drm/msm: Initial add DSI connector support
authorHai Li <hali@codeaurora.org>
Tue, 31 Mar 2015 18:36:33 +0000 (14:36 -0400)
committerRob Clark <robdclark@gmail.com>
Wed, 1 Apr 2015 23:29:38 +0000 (19:29 -0400)
This change adds the DSI connector support in msm drm driver.

v1: Initial change
v2:
- Address comments from Archit + minor clean-ups
- Rebase to not depend on msm_drm_sub_dev change [Rob's comment]
v3: Fix issues when initialization is failed

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
drivers/gpu/drm/msm/Kconfig
drivers/gpu/drm/msm/Makefile
drivers/gpu/drm/msm/dsi/dsi.c [new file with mode: 0644]
drivers/gpu/drm/msm/dsi/dsi.h [new file with mode: 0644]
drivers/gpu/drm/msm/dsi/dsi_host.c [new file with mode: 0644]
drivers/gpu/drm/msm/dsi/dsi_manager.c [new file with mode: 0644]
drivers/gpu/drm/msm/dsi/dsi_phy.c [new file with mode: 0644]
drivers/gpu/drm/msm/msm_drv.h

index bacbbb70f679a45d1cbe70ec631c19d0be807e4f..0a6f6764a37c26e192e667f3a9bb62d3d14d5ad7 100644 (file)
@@ -35,3 +35,14 @@ config DRM_MSM_REGISTER_LOGGING
          Compile in support for logging register reads/writes in a format
          that can be parsed by envytools demsm tool.  If enabled, register
          logging can be switched on via msm.reglog=y module param.
+
+config DRM_MSM_DSI
+       bool "Enable DSI support in MSM DRM driver"
+       depends on DRM_MSM
+       select DRM_PANEL
+       select DRM_MIPI_DSI
+       default y
+       help
+         Choose this option if you have a need for MIPI DSI connector
+         support.
+
index 674a132fd76e1373e6be33178ba46413a20c6de0..5c144cc5f8db314f6cbcb502290a876d03efb1c1 100644 (file)
@@ -50,5 +50,9 @@ msm-y := \
 
 msm-$(CONFIG_DRM_MSM_FBDEV) += msm_fbdev.o
 msm-$(CONFIG_COMMON_CLK) += mdp/mdp4/mdp4_lvds_pll.o
+msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \
+                       dsi/dsi_host.o \
+                       dsi/dsi_manager.o \
+                       dsi/dsi_phy.o
 
 obj-$(CONFIG_DRM_MSM)  += msm.o
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
new file mode 100644 (file)
index 0000000..28d1f95
--- /dev/null
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "dsi.h"
+
+struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
+{
+       if (!msm_dsi || !msm_dsi->panel)
+               return NULL;
+
+       return (msm_dsi->panel_flags & MIPI_DSI_MODE_VIDEO) ?
+               msm_dsi->encoders[MSM_DSI_VIDEO_ENCODER_ID] :
+               msm_dsi->encoders[MSM_DSI_CMD_ENCODER_ID];
+}
+
+static void dsi_destroy(struct msm_dsi *msm_dsi)
+{
+       if (!msm_dsi)
+               return;
+
+       msm_dsi_manager_unregister(msm_dsi);
+       if (msm_dsi->host) {
+               msm_dsi_host_destroy(msm_dsi->host);
+               msm_dsi->host = NULL;
+       }
+
+       platform_set_drvdata(msm_dsi->pdev, NULL);
+}
+
+static struct msm_dsi *dsi_init(struct platform_device *pdev)
+{
+       struct msm_dsi *msm_dsi = NULL;
+       int ret;
+
+       if (!pdev) {
+               dev_err(&pdev->dev, "no dsi device\n");
+               ret = -ENXIO;
+               goto fail;
+       }
+
+       msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
+       if (!msm_dsi) {
+               ret = -ENOMEM;
+               goto fail;
+       }
+       DBG("dsi probed=%p", msm_dsi);
+
+       msm_dsi->pdev = pdev;
+       platform_set_drvdata(pdev, msm_dsi);
+
+       /* Init dsi host */
+       ret = msm_dsi_host_init(msm_dsi);
+       if (ret)
+               goto fail;
+
+       /* Register to dsi manager */
+       ret = msm_dsi_manager_register(msm_dsi);
+       if (ret)
+               goto fail;
+
+       return msm_dsi;
+
+fail:
+       if (msm_dsi)
+               dsi_destroy(msm_dsi);
+
+       return ERR_PTR(ret);
+}
+
+static int dsi_bind(struct device *dev, struct device *master, void *data)
+{
+       struct drm_device *drm = dev_get_drvdata(master);
+       struct msm_drm_private *priv = drm->dev_private;
+       struct platform_device *pdev = to_platform_device(dev);
+       struct msm_dsi *msm_dsi;
+
+       DBG("");
+       msm_dsi = dsi_init(pdev);
+       if (IS_ERR(msm_dsi))
+               return PTR_ERR(msm_dsi);
+
+       priv->dsi[msm_dsi->id] = msm_dsi;
+
+       return 0;
+}
+
+static void dsi_unbind(struct device *dev, struct device *master,
+               void *data)
+{
+       struct drm_device *drm = dev_get_drvdata(master);
+       struct msm_drm_private *priv = drm->dev_private;
+       struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
+       int id = msm_dsi->id;
+
+       if (priv->dsi[id]) {
+               dsi_destroy(msm_dsi);
+               priv->dsi[id] = NULL;
+       }
+}
+
+static const struct component_ops dsi_ops = {
+       .bind   = dsi_bind,
+       .unbind = dsi_unbind,
+};
+
+static int dsi_dev_probe(struct platform_device *pdev)
+{
+       return component_add(&pdev->dev, &dsi_ops);
+}
+
+static int dsi_dev_remove(struct platform_device *pdev)
+{
+       DBG("");
+       component_del(&pdev->dev, &dsi_ops);
+       return 0;
+}
+
+static const struct of_device_id dt_match[] = {
+       { .compatible = "qcom,mdss-dsi-ctrl" },
+       {}
+};
+
+static struct platform_driver dsi_driver = {
+       .probe = dsi_dev_probe,
+       .remove = dsi_dev_remove,
+       .driver = {
+               .name = "msm_dsi",
+               .of_match_table = dt_match,
+       },
+};
+
+void __init msm_dsi_register(void)
+{
+       DBG("");
+       platform_driver_register(&dsi_driver);
+}
+
+void __exit msm_dsi_unregister(void)
+{
+       DBG("");
+       platform_driver_unregister(&dsi_driver);
+}
+
+int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
+               struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM])
+{
+       struct msm_drm_private *priv = dev->dev_private;
+       int ret, i;
+
+       if (WARN_ON(!encoders[MSM_DSI_VIDEO_ENCODER_ID] ||
+               !encoders[MSM_DSI_CMD_ENCODER_ID]))
+               return -EINVAL;
+
+       msm_dsi->dev = dev;
+
+       ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
+       if (ret) {
+               dev_err(dev->dev, "failed to modeset init host: %d\n", ret);
+               goto fail;
+       }
+
+       msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
+       if (IS_ERR(msm_dsi->bridge)) {
+               ret = PTR_ERR(msm_dsi->bridge);
+               dev_err(dev->dev, "failed to create dsi bridge: %d\n", ret);
+               msm_dsi->bridge = NULL;
+               goto fail;
+       }
+
+       msm_dsi->connector = msm_dsi_manager_connector_init(msm_dsi->id);
+       if (IS_ERR(msm_dsi->connector)) {
+               ret = PTR_ERR(msm_dsi->connector);
+               dev_err(dev->dev, "failed to create dsi connector: %d\n", ret);
+               msm_dsi->connector = NULL;
+               goto fail;
+       }
+
+       for (i = 0; i < MSM_DSI_ENCODER_NUM; i++) {
+               encoders[i]->bridge = msm_dsi->bridge;
+               msm_dsi->encoders[i] = encoders[i];
+       }
+
+       priv->bridges[priv->num_bridges++]       = msm_dsi->bridge;
+       priv->connectors[priv->num_connectors++] = msm_dsi->connector;
+
+       return 0;
+fail:
+       if (msm_dsi) {
+               /* bridge/connector are normally destroyed by drm: */
+               if (msm_dsi->bridge) {
+                       msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
+                       msm_dsi->bridge = NULL;
+               }
+               if (msm_dsi->connector) {
+                       msm_dsi->connector->funcs->destroy(msm_dsi->connector);
+                       msm_dsi->connector = NULL;
+               }
+       }
+
+       return ret;
+}
+
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
new file mode 100644 (file)
index 0000000..10f54d4
--- /dev/null
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __DSI_CONNECTOR_H__
+#define __DSI_CONNECTOR_H__
+
+#include <linux/platform_device.h>
+
+#include "drm_crtc.h"
+#include "drm_mipi_dsi.h"
+#include "drm_panel.h"
+
+#include "msm_drv.h"
+
+#define DSI_0  0
+#define DSI_1  1
+#define DSI_MAX        2
+
+#define DSI_CLOCK_MASTER       DSI_0
+#define DSI_CLOCK_SLAVE                DSI_1
+
+#define DSI_LEFT               DSI_0
+#define DSI_RIGHT              DSI_1
+
+/* According to the current drm framework sequence, take the encoder of
+ * DSI_1 as master encoder
+ */
+#define DSI_ENCODER_MASTER     DSI_1
+#define DSI_ENCODER_SLAVE      DSI_0
+
+struct msm_dsi {
+       struct drm_device *dev;
+       struct platform_device *pdev;
+
+       struct drm_connector *connector;
+       struct drm_bridge *bridge;
+
+       struct mipi_dsi_host *host;
+       struct msm_dsi_phy *phy;
+       struct drm_panel *panel;
+       unsigned long panel_flags;
+       bool phy_enabled;
+
+       /* the encoders we are hooked to (outside of dsi block) */
+       struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM];
+
+       int id;
+};
+
+/* dsi manager */
+struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
+void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
+struct drm_connector *msm_dsi_manager_connector_init(u8 id);
+int msm_dsi_manager_phy_enable(int id,
+               const unsigned long bit_rate, const unsigned long esc_rate,
+               u32 *clk_pre, u32 *clk_post);
+void msm_dsi_manager_phy_disable(int id);
+int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
+bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 iova, u32 len);
+int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
+void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi);
+
+/* msm dsi */
+struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
+
+/* dsi host */
+int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
+                                       const struct mipi_dsi_msg *msg);
+void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
+                                       const struct mipi_dsi_msg *msg);
+int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
+                                       const struct mipi_dsi_msg *msg);
+int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
+                                       const struct mipi_dsi_msg *msg);
+void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host,
+                                       u32 iova, u32 len);
+int msm_dsi_host_enable(struct mipi_dsi_host *host);
+int msm_dsi_host_disable(struct mipi_dsi_host *host);
+int msm_dsi_host_power_on(struct mipi_dsi_host *host);
+int msm_dsi_host_power_off(struct mipi_dsi_host *host);
+int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
+                                       struct drm_display_mode *mode);
+struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
+                                       unsigned long *panel_flags);
+int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer);
+void msm_dsi_host_unregister(struct mipi_dsi_host *host);
+void msm_dsi_host_destroy(struct mipi_dsi_host *host);
+int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
+                                       struct drm_device *dev);
+int msm_dsi_host_init(struct msm_dsi *msm_dsi);
+
+/* dsi phy */
+struct msm_dsi_phy;
+enum msm_dsi_phy_type {
+       MSM_DSI_PHY_UNKNOWN,
+       MSM_DSI_PHY_28NM,
+       MSM_DSI_PHY_MAX
+};
+struct msm_dsi_phy *msm_dsi_phy_init(struct platform_device *pdev,
+                       enum msm_dsi_phy_type type, int id);
+int msm_dsi_phy_enable(struct msm_dsi_phy *phy, bool is_dual_panel,
+       const unsigned long bit_rate, const unsigned long esc_rate);
+int msm_dsi_phy_disable(struct msm_dsi_phy *phy);
+void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy,
+                                       u32 *clk_pre, u32 *clk_post);
+#endif /* __DSI_CONNECTOR_H__ */
+
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
new file mode 100644 (file)
index 0000000..fdc54e3
--- /dev/null
@@ -0,0 +1,1993 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_irq.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spinlock.h>
+#include <video/mipi_display.h>
+
+#include "dsi.h"
+#include "dsi.xml.h"
+
+#define MSM_DSI_VER_MAJOR_V2   0x02
+#define MSM_DSI_VER_MAJOR_6G   0x03
+#define MSM_DSI_6G_VER_MINOR_V1_0      0x10000000
+#define MSM_DSI_6G_VER_MINOR_V1_1      0x10010000
+#define MSM_DSI_6G_VER_MINOR_V1_1_1    0x10010001
+#define MSM_DSI_6G_VER_MINOR_V1_2      0x10020000
+#define MSM_DSI_6G_VER_MINOR_V1_3_1    0x10030001
+
+#define DSI_6G_REG_SHIFT       4
+
+#define DSI_REGULATOR_MAX      8
+struct dsi_reg_entry {
+       char name[32];
+       int min_voltage;
+       int max_voltage;
+       int enable_load;
+       int disable_load;
+};
+
+struct dsi_reg_config {
+       int num;
+       struct dsi_reg_entry regs[DSI_REGULATOR_MAX];
+};
+
+struct dsi_config {
+       u32 major;
+       u32 minor;
+       u32 io_offset;
+       enum msm_dsi_phy_type phy_type;
+       struct dsi_reg_config reg_cfg;
+};
+
+static const struct dsi_config dsi_cfgs[] = {
+       {MSM_DSI_VER_MAJOR_V2, 0, 0, MSM_DSI_PHY_UNKNOWN},
+       { /* 8974 v1 */
+               .major = MSM_DSI_VER_MAJOR_6G,
+               .minor = MSM_DSI_6G_VER_MINOR_V1_0,
+               .io_offset = DSI_6G_REG_SHIFT,
+               .phy_type = MSM_DSI_PHY_28NM,
+               .reg_cfg = {
+                       .num = 4,
+                       .regs = {
+                               {"gdsc", -1, -1, -1, -1},
+                               {"vdd", 3000000, 3000000, 150000, 100},
+                               {"vdda", 1200000, 1200000, 100000, 100},
+                               {"vddio", 1800000, 1800000, 100000, 100},
+                       },
+               },
+       },
+       { /* 8974 v2 */
+               .major = MSM_DSI_VER_MAJOR_6G,
+               .minor = MSM_DSI_6G_VER_MINOR_V1_1,
+               .io_offset = DSI_6G_REG_SHIFT,
+               .phy_type = MSM_DSI_PHY_28NM,
+               .reg_cfg = {
+                       .num = 4,
+                       .regs = {
+                               {"gdsc", -1, -1, -1, -1},
+                               {"vdd", 3000000, 3000000, 150000, 100},
+                               {"vdda", 1200000, 1200000, 100000, 100},
+                               {"vddio", 1800000, 1800000, 100000, 100},
+                       },
+               },
+       },
+       { /* 8974 v3 */
+               .major = MSM_DSI_VER_MAJOR_6G,
+               .minor = MSM_DSI_6G_VER_MINOR_V1_1_1,
+               .io_offset = DSI_6G_REG_SHIFT,
+               .phy_type = MSM_DSI_PHY_28NM,
+               .reg_cfg = {
+                       .num = 4,
+                       .regs = {
+                               {"gdsc", -1, -1, -1, -1},
+                               {"vdd", 3000000, 3000000, 150000, 100},
+                               {"vdda", 1200000, 1200000, 100000, 100},
+                               {"vddio", 1800000, 1800000, 100000, 100},
+                       },
+               },
+       },
+       { /* 8084 */
+               .major = MSM_DSI_VER_MAJOR_6G,
+               .minor = MSM_DSI_6G_VER_MINOR_V1_2,
+               .io_offset = DSI_6G_REG_SHIFT,
+               .phy_type = MSM_DSI_PHY_28NM,
+               .reg_cfg = {
+                       .num = 4,
+                       .regs = {
+                               {"gdsc", -1, -1, -1, -1},
+                               {"vdd", 3000000, 3000000, 150000, 100},
+                               {"vdda", 1200000, 1200000, 100000, 100},
+                               {"vddio", 1800000, 1800000, 100000, 100},
+                       },
+               },
+       },
+       { /* 8916 */
+               .major = MSM_DSI_VER_MAJOR_6G,
+               .minor = MSM_DSI_6G_VER_MINOR_V1_3_1,
+               .io_offset = DSI_6G_REG_SHIFT,
+               .phy_type = MSM_DSI_PHY_28NM,
+               .reg_cfg = {
+                       .num = 4,
+                       .regs = {
+                               {"gdsc", -1, -1, -1, -1},
+                               {"vdd", 2850000, 2850000, 100000, 100},
+                               {"vdda", 1200000, 1200000, 100000, 100},
+                               {"vddio", 1800000, 1800000, 100000, 100},
+                       },
+               },
+       },
+};
+
+static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
+{
+       u32 ver;
+       u32 ver_6g;
+
+       if (!major || !minor)
+               return -EINVAL;
+
+       /* From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
+        * makes all other registers 4-byte shifted down.
+        */
+       ver_6g = msm_readl(base + REG_DSI_6G_HW_VERSION);
+       if (ver_6g == 0) {
+               ver = msm_readl(base + REG_DSI_VERSION);
+               ver = FIELD(ver, DSI_VERSION_MAJOR);
+               if (ver <= MSM_DSI_VER_MAJOR_V2) {
+                       /* old versions */
+                       *major = ver;
+                       *minor = 0;
+                       return 0;
+               } else {
+                       return -EINVAL;
+               }
+       } else {
+               ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
+               ver = FIELD(ver, DSI_VERSION_MAJOR);
+               if (ver == MSM_DSI_VER_MAJOR_6G) {
+                       /* 6G version */
+                       *major = ver;
+                       *minor = ver_6g;
+                       return 0;
+               } else {
+                       return -EINVAL;
+               }
+       }
+}
+
+#define DSI_ERR_STATE_ACK                      0x0000
+#define DSI_ERR_STATE_TIMEOUT                  0x0001
+#define DSI_ERR_STATE_DLN0_PHY                 0x0002
+#define DSI_ERR_STATE_FIFO                     0x0004
+#define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW       0x0008
+#define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
+#define DSI_ERR_STATE_PLL_UNLOCKED             0x0020
+
+#define DSI_CLK_CTRL_ENABLE_CLKS       \
+               (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
+               DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
+               DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
+               DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
+
+struct msm_dsi_host {
+       struct mipi_dsi_host base;
+
+       struct platform_device *pdev;
+       struct drm_device *dev;
+
+       int id;
+
+       void __iomem *ctrl_base;
+       struct regulator_bulk_data supplies[DSI_REGULATOR_MAX];
+       struct clk *mdp_core_clk;
+       struct clk *ahb_clk;
+       struct clk *axi_clk;
+       struct clk *mmss_misc_ahb_clk;
+       struct clk *byte_clk;
+       struct clk *esc_clk;
+       struct clk *pixel_clk;
+       u32 byte_clk_rate;
+
+       struct gpio_desc *disp_en_gpio;
+       struct gpio_desc *te_gpio;
+
+       const struct dsi_config *cfg;
+
+       struct completion dma_comp;
+       struct completion video_comp;
+       struct mutex dev_mutex;
+       struct mutex cmd_mutex;
+       struct mutex clk_mutex;
+       spinlock_t intr_lock; /* Protect interrupt ctrl register */
+
+       u32 err_work_state;
+       struct work_struct err_work;
+       struct workqueue_struct *workqueue;
+
+       struct drm_gem_object *tx_gem_obj;
+       u8 *rx_buf;
+
+       struct drm_display_mode *mode;
+
+       /* Panel info */
+       struct device_node *panel_node;
+       unsigned int channel;
+       unsigned int lanes;
+       enum mipi_dsi_pixel_format format;
+       unsigned long mode_flags;
+
+       u32 dma_cmd_ctrl_restore;
+
+       bool registered;
+       bool power_on;
+       int irq;
+};
+
+static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
+{
+       switch (fmt) {
+       case MIPI_DSI_FMT_RGB565:               return 16;
+       case MIPI_DSI_FMT_RGB666_PACKED:        return 18;
+       case MIPI_DSI_FMT_RGB666:
+       case MIPI_DSI_FMT_RGB888:
+       default:                                return 24;
+       }
+}
+
+static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
+{
+       return msm_readl(msm_host->ctrl_base + msm_host->cfg->io_offset + reg);
+}
+static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
+{
+       msm_writel(data, msm_host->ctrl_base + msm_host->cfg->io_offset + reg);
+}
+
+static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host);
+static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host);
+
+static const struct dsi_config *dsi_get_config(struct msm_dsi_host *msm_host)
+{
+       const struct dsi_config *cfg;
+       struct regulator *gdsc_reg;
+       int i, ret;
+       u32 major = 0, minor = 0;
+
+       gdsc_reg = regulator_get(&msm_host->pdev->dev, "gdsc");
+       if (IS_ERR_OR_NULL(gdsc_reg)) {
+               pr_err("%s: cannot get gdsc\n", __func__);
+               goto fail;
+       }
+       ret = regulator_enable(gdsc_reg);
+       if (ret) {
+               pr_err("%s: unable to enable gdsc\n", __func__);
+               regulator_put(gdsc_reg);
+               goto fail;
+       }
+       ret = clk_prepare_enable(msm_host->ahb_clk);
+       if (ret) {
+               pr_err("%s: unable to enable ahb_clk\n", __func__);
+               regulator_disable(gdsc_reg);
+               regulator_put(gdsc_reg);
+               goto fail;
+       }
+
+       ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
+
+       clk_disable_unprepare(msm_host->ahb_clk);
+       regulator_disable(gdsc_reg);
+       regulator_put(gdsc_reg);
+       if (ret) {
+               pr_err("%s: Invalid version\n", __func__);
+               goto fail;
+       }
+
+       for (i = 0; i < ARRAY_SIZE(dsi_cfgs); i++) {
+               cfg = dsi_cfgs + i;
+               if ((cfg->major == major) && (cfg->minor == minor))
+                       return cfg;
+       }
+       pr_err("%s: Version %x:%x not support\n", __func__, major, minor);
+
+fail:
+       return NULL;
+}
+
+static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
+{
+       return container_of(host, struct msm_dsi_host, base);
+}
+
+static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host)
+{
+       struct regulator_bulk_data *s = msm_host->supplies;
+       const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
+       int num = msm_host->cfg->reg_cfg.num;
+       int i;
+
+       DBG("");
+       for (i = num - 1; i >= 0; i--)
+               if (regs[i].disable_load >= 0)
+                       regulator_set_optimum_mode(s[i].consumer,
+                                               regs[i].disable_load);
+
+       regulator_bulk_disable(num, s);
+}
+
+static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host)
+{
+       struct regulator_bulk_data *s = msm_host->supplies;
+       const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
+       int num = msm_host->cfg->reg_cfg.num;
+       int ret, i;
+
+       DBG("");
+       for (i = 0; i < num; i++) {
+               if (regs[i].enable_load >= 0) {
+                       ret = regulator_set_optimum_mode(s[i].consumer,
+                                                       regs[i].enable_load);
+                       if (ret < 0) {
+                               pr_err("regulator %d set op mode failed, %d\n",
+                                       i, ret);
+                               goto fail;
+                       }
+               }
+       }
+
+       ret = regulator_bulk_enable(num, s);
+       if (ret < 0) {
+               pr_err("regulator enable failed, %d\n", ret);
+               goto fail;
+       }
+
+       return 0;
+
+fail:
+       for (i--; i >= 0; i--)
+               regulator_set_optimum_mode(s[i].consumer, regs[i].disable_load);
+       return ret;
+}
+
+static int dsi_regulator_init(struct msm_dsi_host *msm_host)
+{
+       struct regulator_bulk_data *s = msm_host->supplies;
+       const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
+       int num = msm_host->cfg->reg_cfg.num;
+       int i, ret;
+
+       for (i = 0; i < num; i++)
+               s[i].supply = regs[i].name;
+
+       ret = devm_regulator_bulk_get(&msm_host->pdev->dev, num, s);
+       if (ret < 0) {
+               pr_err("%s: failed to init regulator, ret=%d\n",
+                                               __func__, ret);
+               return ret;
+       }
+
+       for (i = 0; i < num; i++) {
+               if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) {
+                       ret = regulator_set_voltage(s[i].consumer,
+                               regs[i].min_voltage, regs[i].max_voltage);
+                       if (ret < 0) {
+                               pr_err("regulator %d set voltage failed, %d\n",
+                                       i, ret);
+                               return ret;
+                       }
+               }
+       }
+
+       return 0;
+}
+
+static int dsi_clk_init(struct msm_dsi_host *msm_host)
+{
+       struct device *dev = &msm_host->pdev->dev;
+       int ret = 0;
+
+       msm_host->mdp_core_clk = devm_clk_get(dev, "mdp_core_clk");
+       if (IS_ERR(msm_host->mdp_core_clk)) {
+               ret = PTR_ERR(msm_host->mdp_core_clk);
+               pr_err("%s: Unable to get mdp core clk. ret=%d\n",
+                       __func__, ret);
+               goto exit;
+       }
+
+       msm_host->ahb_clk = devm_clk_get(dev, "iface_clk");
+       if (IS_ERR(msm_host->ahb_clk)) {
+               ret = PTR_ERR(msm_host->ahb_clk);
+               pr_err("%s: Unable to get mdss ahb clk. ret=%d\n",
+                       __func__, ret);
+               goto exit;
+       }
+
+       msm_host->axi_clk = devm_clk_get(dev, "bus_clk");
+       if (IS_ERR(msm_host->axi_clk)) {
+               ret = PTR_ERR(msm_host->axi_clk);
+               pr_err("%s: Unable to get axi bus clk. ret=%d\n",
+                       __func__, ret);
+               goto exit;
+       }
+
+       msm_host->mmss_misc_ahb_clk = devm_clk_get(dev, "core_mmss_clk");
+       if (IS_ERR(msm_host->mmss_misc_ahb_clk)) {
+               ret = PTR_ERR(msm_host->mmss_misc_ahb_clk);
+               pr_err("%s: Unable to get mmss misc ahb clk. ret=%d\n",
+                       __func__, ret);
+               goto exit;
+       }
+
+       msm_host->byte_clk = devm_clk_get(dev, "byte_clk");
+       if (IS_ERR(msm_host->byte_clk)) {
+               ret = PTR_ERR(msm_host->byte_clk);
+               pr_err("%s: can't find dsi_byte_clk. ret=%d\n",
+                       __func__, ret);
+               msm_host->byte_clk = NULL;
+               goto exit;
+       }
+
+       msm_host->pixel_clk = devm_clk_get(dev, "pixel_clk");
+       if (IS_ERR(msm_host->pixel_clk)) {
+               ret = PTR_ERR(msm_host->pixel_clk);
+               pr_err("%s: can't find dsi_pixel_clk. ret=%d\n",
+                       __func__, ret);
+               msm_host->pixel_clk = NULL;
+               goto exit;
+       }
+
+       msm_host->esc_clk = devm_clk_get(dev, "core_clk");
+       if (IS_ERR(msm_host->esc_clk)) {
+               ret = PTR_ERR(msm_host->esc_clk);
+               pr_err("%s: can't find dsi_esc_clk. ret=%d\n",
+                       __func__, ret);
+               msm_host->esc_clk = NULL;
+               goto exit;
+       }
+
+exit:
+       return ret;
+}
+
+static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
+{
+       int ret;
+
+       DBG("id=%d", msm_host->id);
+
+       ret = clk_prepare_enable(msm_host->mdp_core_clk);
+       if (ret) {
+               pr_err("%s: failed to enable mdp_core_clock, %d\n",
+                                                        __func__, ret);
+               goto core_clk_err;
+       }
+
+       ret = clk_prepare_enable(msm_host->ahb_clk);
+       if (ret) {
+               pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret);
+               goto ahb_clk_err;
+       }
+
+       ret = clk_prepare_enable(msm_host->axi_clk);
+       if (ret) {
+               pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret);
+               goto axi_clk_err;
+       }
+
+       ret = clk_prepare_enable(msm_host->mmss_misc_ahb_clk);
+       if (ret) {
+               pr_err("%s: failed to enable mmss misc ahb clk, %d\n",
+                       __func__, ret);
+               goto misc_ahb_clk_err;
+       }
+
+       return 0;
+
+misc_ahb_clk_err:
+       clk_disable_unprepare(msm_host->axi_clk);
+axi_clk_err:
+       clk_disable_unprepare(msm_host->ahb_clk);
+ahb_clk_err:
+       clk_disable_unprepare(msm_host->mdp_core_clk);
+core_clk_err:
+       return ret;
+}
+
+static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
+{
+       DBG("");
+       clk_disable_unprepare(msm_host->mmss_misc_ahb_clk);
+       clk_disable_unprepare(msm_host->axi_clk);
+       clk_disable_unprepare(msm_host->ahb_clk);
+       clk_disable_unprepare(msm_host->mdp_core_clk);
+}
+
+static int dsi_link_clk_enable(struct msm_dsi_host *msm_host)
+{
+       int ret;
+
+       DBG("Set clk rates: pclk=%d, byteclk=%d",
+               msm_host->mode->clock, msm_host->byte_clk_rate);
+
+       ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
+       if (ret) {
+               pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
+               goto error;
+       }
+
+       ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
+       if (ret) {
+               pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
+               goto error;
+       }
+
+       ret = clk_prepare_enable(msm_host->esc_clk);
+       if (ret) {
+               pr_err("%s: Failed to enable dsi esc clk\n", __func__);
+               goto error;
+       }
+
+       ret = clk_prepare_enable(msm_host->byte_clk);
+       if (ret) {
+               pr_err("%s: Failed to enable dsi byte clk\n", __func__);
+               goto byte_clk_err;
+       }
+
+       ret = clk_prepare_enable(msm_host->pixel_clk);
+       if (ret) {
+               pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
+               goto pixel_clk_err;
+       }
+
+       return 0;
+
+pixel_clk_err:
+       clk_disable_unprepare(msm_host->byte_clk);
+byte_clk_err:
+       clk_disable_unprepare(msm_host->esc_clk);
+error:
+       return ret;
+}
+
+static void dsi_link_clk_disable(struct msm_dsi_host *msm_host)
+{
+       clk_disable_unprepare(msm_host->esc_clk);
+       clk_disable_unprepare(msm_host->pixel_clk);
+       clk_disable_unprepare(msm_host->byte_clk);
+}
+
+static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable)
+{
+       int ret = 0;
+
+       mutex_lock(&msm_host->clk_mutex);
+       if (enable) {
+               ret = dsi_bus_clk_enable(msm_host);
+               if (ret) {
+                       pr_err("%s: Can not enable bus clk, %d\n",
+                               __func__, ret);
+                       goto unlock_ret;
+               }
+               ret = dsi_link_clk_enable(msm_host);
+               if (ret) {
+                       pr_err("%s: Can not enable link clk, %d\n",
+                               __func__, ret);
+                       dsi_bus_clk_disable(msm_host);
+                       goto unlock_ret;
+               }
+       } else {
+               dsi_link_clk_disable(msm_host);
+               dsi_bus_clk_disable(msm_host);
+       }
+
+unlock_ret:
+       mutex_unlock(&msm_host->clk_mutex);
+       return ret;
+}
+
+static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
+{
+       struct drm_display_mode *mode = msm_host->mode;
+       u8 lanes = msm_host->lanes;
+       u32 bpp = dsi_get_bpp(msm_host->format);
+       u32 pclk_rate;
+
+       if (!mode) {
+               pr_err("%s: mode not set\n", __func__);
+               return -EINVAL;
+       }
+
+       pclk_rate = mode->clock * 1000;
+       if (lanes > 0) {
+               msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes);
+       } else {
+               pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
+               msm_host->byte_clk_rate = (pclk_rate * bpp) / 8;
+       }
+
+       DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
+
+       return 0;
+}
+
+static void dsi_phy_sw_reset(struct msm_dsi_host *msm_host)
+{
+       DBG("");
+       dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
+       /* Make sure fully reset */
+       wmb();
+       udelay(1000);
+       dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
+       udelay(100);
+}
+
+static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
+{
+       u32 intr;
+       unsigned long flags;
+
+       spin_lock_irqsave(&msm_host->intr_lock, flags);
+       intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
+
+       if (enable)
+               intr |= mask;
+       else
+               intr &= ~mask;
+
+       DBG("intr=%x enable=%d", intr, enable);
+
+       dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
+       spin_unlock_irqrestore(&msm_host->intr_lock, flags);
+}
+
+static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
+{
+       if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+               return BURST_MODE;
+       else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+               return NON_BURST_SYNCH_PULSE;
+
+       return NON_BURST_SYNCH_EVENT;
+}
+
+static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
+                               const enum mipi_dsi_pixel_format mipi_fmt)
+{
+       switch (mipi_fmt) {
+       case MIPI_DSI_FMT_RGB888:       return VID_DST_FORMAT_RGB888;
+       case MIPI_DSI_FMT_RGB666:       return VID_DST_FORMAT_RGB666_LOOSE;
+       case MIPI_DSI_FMT_RGB666_PACKED:        return VID_DST_FORMAT_RGB666;
+       case MIPI_DSI_FMT_RGB565:       return VID_DST_FORMAT_RGB565;
+       default:                        return VID_DST_FORMAT_RGB888;
+       }
+}
+
+static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
+                               const enum mipi_dsi_pixel_format mipi_fmt)
+{
+       switch (mipi_fmt) {
+       case MIPI_DSI_FMT_RGB888:       return CMD_DST_FORMAT_RGB888;
+       case MIPI_DSI_FMT_RGB666_PACKED:
+       case MIPI_DSI_FMT_RGB666:       return VID_DST_FORMAT_RGB666;
+       case MIPI_DSI_FMT_RGB565:       return CMD_DST_FORMAT_RGB565;
+       default:                        return CMD_DST_FORMAT_RGB888;
+       }
+}
+
+static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
+                               u32 clk_pre, u32 clk_post)
+{
+       u32 flags = msm_host->mode_flags;
+       enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
+       u32 data = 0;
+
+       if (!enable) {
+               dsi_write(msm_host, REG_DSI_CTRL, 0);
+               return;
+       }
+
+       if (flags & MIPI_DSI_MODE_VIDEO) {
+               if (flags & MIPI_DSI_MODE_VIDEO_HSE)
+                       data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
+               if (flags & MIPI_DSI_MODE_VIDEO_HFP)
+                       data |= DSI_VID_CFG0_HFP_POWER_STOP;
+               if (flags & MIPI_DSI_MODE_VIDEO_HBP)
+                       data |= DSI_VID_CFG0_HBP_POWER_STOP;
+               if (flags & MIPI_DSI_MODE_VIDEO_HSA)
+                       data |= DSI_VID_CFG0_HSA_POWER_STOP;
+               /* Always set low power stop mode for BLLP
+                * to let command engine send packets
+                */
+               data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
+                       DSI_VID_CFG0_BLLP_POWER_STOP;
+               data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
+               data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
+               data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
+               dsi_write(msm_host, REG_DSI_VID_CFG0, data);
+
+               /* Do not swap RGB colors */
+               data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
+               dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
+       } else {
+               /* Do not swap RGB colors */
+               data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
+               data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
+               dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
+
+               data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
+                       DSI_CMD_CFG1_WR_MEM_CONTINUE(
+                                       MIPI_DCS_WRITE_MEMORY_CONTINUE);
+               /* Always insert DCS command */
+               data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
+               dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
+       }
+
+       dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
+                       DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
+                       DSI_CMD_DMA_CTRL_LOW_POWER);
+
+       data = 0;
+       /* Always assume dedicated TE pin */
+       data |= DSI_TRIG_CTRL_TE;
+       data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
+       data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
+       data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
+       if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) &&
+               (msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
+               data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
+       dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
+
+       data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(clk_post) |
+               DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(clk_pre);
+       dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
+
+       data = 0;
+       if (!(flags & MIPI_DSI_MODE_EOT_PACKET))
+               data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
+       dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
+
+       /* allow only ack-err-status to generate interrupt */
+       dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
+
+       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
+
+       dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
+
+       data = DSI_CTRL_CLK_EN;
+
+       DBG("lane number=%d", msm_host->lanes);
+       if (msm_host->lanes == 2) {
+               data |= DSI_CTRL_LANE1 | DSI_CTRL_LANE2;
+               /* swap lanes for 2-lane panel for better performance */
+               dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
+                       DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_1230));
+       } else {
+               /* Take 4 lanes as default */
+               data |= DSI_CTRL_LANE0 | DSI_CTRL_LANE1 | DSI_CTRL_LANE2 |
+                       DSI_CTRL_LANE3;
+               /* Do not swap lanes for 4-lane panel */
+               dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
+                       DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_0123));
+       }
+       data |= DSI_CTRL_ENABLE;
+
+       dsi_write(msm_host, REG_DSI_CTRL, data);
+}
+
+static void dsi_timing_setup(struct msm_dsi_host *msm_host)
+{
+       struct drm_display_mode *mode = msm_host->mode;
+       u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
+       u32 h_total = mode->htotal;
+       u32 v_total = mode->vtotal;
+       u32 hs_end = mode->hsync_end - mode->hsync_start;
+       u32 vs_end = mode->vsync_end - mode->vsync_start;
+       u32 ha_start = h_total - mode->hsync_start;
+       u32 ha_end = ha_start + mode->hdisplay;
+       u32 va_start = v_total - mode->vsync_start;
+       u32 va_end = va_start + mode->vdisplay;
+       u32 wc;
+
+       DBG("");
+
+       if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
+               dsi_write(msm_host, REG_DSI_ACTIVE_H,
+                       DSI_ACTIVE_H_START(ha_start) |
+                       DSI_ACTIVE_H_END(ha_end));
+               dsi_write(msm_host, REG_DSI_ACTIVE_V,
+                       DSI_ACTIVE_V_START(va_start) |
+                       DSI_ACTIVE_V_END(va_end));
+               dsi_write(msm_host, REG_DSI_TOTAL,
+                       DSI_TOTAL_H_TOTAL(h_total - 1) |
+                       DSI_TOTAL_V_TOTAL(v_total - 1));
+
+               dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
+                       DSI_ACTIVE_HSYNC_START(hs_start) |
+                       DSI_ACTIVE_HSYNC_END(hs_end));
+               dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
+               dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
+                       DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
+                       DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
+       } else {                /* command mode */
+               /* image data and 1 byte write_memory_start cmd */
+               wc = mode->hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
+
+               dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_CTRL,
+                       DSI_CMD_MDP_STREAM_CTRL_WORD_COUNT(wc) |
+                       DSI_CMD_MDP_STREAM_CTRL_VIRTUAL_CHANNEL(
+                                       msm_host->channel) |
+                       DSI_CMD_MDP_STREAM_CTRL_DATA_TYPE(
+                                       MIPI_DSI_DCS_LONG_WRITE));
+
+               dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_TOTAL,
+                       DSI_CMD_MDP_STREAM_TOTAL_H_TOTAL(mode->hdisplay) |
+                       DSI_CMD_MDP_STREAM_TOTAL_V_TOTAL(mode->vdisplay));
+       }
+}
+
+static void dsi_sw_reset(struct msm_dsi_host *msm_host)
+{
+       dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
+       wmb(); /* clocks need to be enabled before reset */
+
+       dsi_write(msm_host, REG_DSI_RESET, 1);
+       wmb(); /* make sure reset happen */
+       dsi_write(msm_host, REG_DSI_RESET, 0);
+}
+
+static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
+                                       bool video_mode, bool enable)
+{
+       u32 dsi_ctrl;
+
+       dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
+
+       if (!enable) {
+               dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
+                               DSI_CTRL_CMD_MODE_EN);
+               dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
+                                       DSI_IRQ_MASK_VIDEO_DONE, 0);
+       } else {
+               if (video_mode) {
+                       dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
+               } else {                /* command mode */
+                       dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
+                       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
+               }
+               dsi_ctrl |= DSI_CTRL_ENABLE;
+       }
+
+       dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
+}
+
+static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
+{
+       u32 data;
+
+       data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
+
+       if (mode == 0)
+               data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
+       else
+               data |= DSI_CMD_DMA_CTRL_LOW_POWER;
+
+       dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
+}
+
+static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
+{
+       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
+
+       reinit_completion(&msm_host->video_comp);
+
+       wait_for_completion_timeout(&msm_host->video_comp,
+                       msecs_to_jiffies(70));
+
+       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
+}
+
+static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
+{
+       if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
+               return;
+
+       if (msm_host->power_on) {
+               dsi_wait4video_done(msm_host);
+               /* delay 4 ms to skip BLLP */
+               usleep_range(2000, 4000);
+       }
+}
+
+/* dsi_cmd */
+static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
+{
+       struct drm_device *dev = msm_host->dev;
+       int ret;
+       u32 iova;
+
+       mutex_lock(&dev->struct_mutex);
+       msm_host->tx_gem_obj = msm_gem_new(dev, size, MSM_BO_UNCACHED);
+       if (IS_ERR(msm_host->tx_gem_obj)) {
+               ret = PTR_ERR(msm_host->tx_gem_obj);
+               pr_err("%s: failed to allocate gem, %d\n", __func__, ret);
+               msm_host->tx_gem_obj = NULL;
+               mutex_unlock(&dev->struct_mutex);
+               return ret;
+       }
+
+       ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj, 0, &iova);
+       if (ret) {
+               pr_err("%s: failed to get iova, %d\n", __func__, ret);
+               return ret;
+       }
+       mutex_unlock(&dev->struct_mutex);
+
+       if (iova & 0x07) {
+               pr_err("%s: buf NOT 8 bytes aligned\n", __func__);
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
+{
+       struct drm_device *dev = msm_host->dev;
+
+       if (msm_host->tx_gem_obj) {
+               msm_gem_put_iova(msm_host->tx_gem_obj, 0);
+               mutex_lock(&dev->struct_mutex);
+               msm_gem_free_object(msm_host->tx_gem_obj);
+               msm_host->tx_gem_obj = NULL;
+               mutex_unlock(&dev->struct_mutex);
+       }
+}
+
+/*
+ * prepare cmd buffer to be txed
+ */
+static int dsi_cmd_dma_add(struct drm_gem_object *tx_gem,
+                       const struct mipi_dsi_msg *msg)
+{
+       struct mipi_dsi_packet packet;
+       int len;
+       int ret;
+       u8 *data;
+
+       ret = mipi_dsi_create_packet(&packet, msg);
+       if (ret) {
+               pr_err("%s: create packet failed, %d\n", __func__, ret);
+               return ret;
+       }
+       len = (packet.size + 3) & (~0x3);
+
+       if (len > tx_gem->size) {
+               pr_err("%s: packet size is too big\n", __func__);
+               return -EINVAL;
+       }
+
+       data = msm_gem_vaddr(tx_gem);
+
+       if (IS_ERR(data)) {
+               ret = PTR_ERR(data);
+               pr_err("%s: get vaddr failed, %d\n", __func__, ret);
+               return ret;
+       }
+
+       /* MSM specific command format in memory */
+       data[0] = packet.header[1];
+       data[1] = packet.header[2];
+       data[2] = packet.header[0];
+       data[3] = BIT(7); /* Last packet */
+       if (mipi_dsi_packet_format_is_long(msg->type))
+               data[3] |= BIT(6);
+       if (msg->rx_buf && msg->rx_len)
+               data[3] |= BIT(5);
+
+       /* Long packet */
+       if (packet.payload && packet.payload_length)
+               memcpy(data + 4, packet.payload, packet.payload_length);
+
+       /* Append 0xff to the end */
+       if (packet.size < len)
+               memset(data + packet.size, 0xff, len - packet.size);
+
+       return len;
+}
+
+/*
+ * dsi_short_read1_resp: 1 parameter
+ */
+static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
+{
+       u8 *data = msg->rx_buf;
+       if (data && (msg->rx_len >= 1)) {
+               *data = buf[1]; /* strip out dcs type */
+               return 1;
+       } else {
+               pr_err("%s: read data does not match with rx_buf len %d\n",
+                       __func__, msg->rx_len);
+               return -EINVAL;
+       }
+}
+
+/*
+ * dsi_short_read2_resp: 2 parameter
+ */
+static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
+{
+       u8 *data = msg->rx_buf;
+       if (data && (msg->rx_len >= 2)) {
+               data[0] = buf[1]; /* strip out dcs type */
+               data[1] = buf[2];
+               return 2;
+       } else {
+               pr_err("%s: read data does not match with rx_buf len %d\n",
+                       __func__, msg->rx_len);
+               return -EINVAL;
+       }
+}
+
+static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
+{
+       /* strip out 4 byte dcs header */
+       if (msg->rx_buf && msg->rx_len)
+               memcpy(msg->rx_buf, buf + 4, msg->rx_len);
+
+       return msg->rx_len;
+}
+
+
+static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
+{
+       int ret;
+       u32 iova;
+       bool triggered;
+
+       ret = msm_gem_get_iova(msm_host->tx_gem_obj, 0, &iova);
+       if (ret) {
+               pr_err("%s: failed to get iova: %d\n", __func__, ret);
+               return ret;
+       }
+
+       reinit_completion(&msm_host->dma_comp);
+
+       dsi_wait4video_eng_busy(msm_host);
+
+       triggered = msm_dsi_manager_cmd_xfer_trigger(
+                                               msm_host->id, iova, len);
+       if (triggered) {
+               ret = wait_for_completion_timeout(&msm_host->dma_comp,
+                                       msecs_to_jiffies(200));
+               DBG("ret=%d", ret);
+               if (ret == 0)
+                       ret = -ETIMEDOUT;
+               else
+                       ret = len;
+       } else
+               ret = len;
+
+       return ret;
+}
+
+static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
+                       u8 *buf, int rx_byte, int pkt_size)
+{
+       u32 *lp, *temp, data;
+       int i, j = 0, cnt;
+       bool ack_error = false;
+       u32 read_cnt;
+       u8 reg[16];
+       int repeated_bytes = 0;
+       int buf_offset = buf - msm_host->rx_buf;
+
+       lp = (u32 *)buf;
+       temp = (u32 *)reg;
+       cnt = (rx_byte + 3) >> 2;
+       if (cnt > 4)
+               cnt = 4; /* 4 x 32 bits registers only */
+
+       /* Calculate real read data count */
+       read_cnt = dsi_read(msm_host, 0x1d4) >> 16;
+
+       ack_error = (rx_byte == 4) ?
+               (read_cnt == 8) : /* short pkt + 4-byte error pkt */
+               (read_cnt == (pkt_size + 6 + 4)); /* long pkt+4-byte error pkt*/
+
+       if (ack_error)
+               read_cnt -= 4; /* Remove 4 byte error pkt */
+
+       /*
+        * In case of multiple reads from the panel, after the first read, there
+        * is possibility that there are some bytes in the payload repeating in
+        * the RDBK_DATA registers. Since we read all the parameters from the
+        * panel right from the first byte for every pass. We need to skip the
+        * repeating bytes and then append the new parameters to the rx buffer.
+        */
+       if (read_cnt > 16) {
+               int bytes_shifted;
+               /* Any data more than 16 bytes will be shifted out.
+                * The temp read buffer should already contain these bytes.
+                * The remaining bytes in read buffer are the repeated bytes.
+                */
+               bytes_shifted = read_cnt - 16;
+               repeated_bytes = buf_offset - bytes_shifted;
+       }
+
+       for (i = cnt - 1; i >= 0; i--) {
+               data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
+               *temp++ = ntohl(data); /* to host byte order */
+               DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
+       }
+
+       for (i = repeated_bytes; i < 16; i++)
+               buf[j++] = reg[i];
+
+       return j;
+}
+
+static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
+                               const struct mipi_dsi_msg *msg)
+{
+       int len, ret;
+       int bllp_len = msm_host->mode->hdisplay *
+                       dsi_get_bpp(msm_host->format) / 8;
+
+       len = dsi_cmd_dma_add(msm_host->tx_gem_obj, msg);
+       if (!len) {
+               pr_err("%s: failed to add cmd type = 0x%x\n",
+                       __func__,  msg->type);
+               return -EINVAL;
+       }
+
+       /* for video mode, do not send cmds more than
+       * one pixel line, since it only transmit it
+       * during BLLP.
+       */
+       /* TODO: if the command is sent in LP mode, the bit rate is only
+        * half of esc clk rate. In this case, if the video is already
+        * actively streaming, we need to check more carefully if the
+        * command can be fit into one BLLP.
+        */
+       if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
+               pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
+                       __func__, len);
+               return -EINVAL;
+       }
+
+       ret = dsi_cmd_dma_tx(msm_host, len);
+       if (ret < len) {
+               pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d\n",
+                       __func__, msg->type, (*(u8 *)(msg->tx_buf)), len);
+               return -ECOMM;
+       }
+
+       return len;
+}
+
+static void dsi_sw_reset_restore(struct msm_dsi_host *msm_host)
+{
+       u32 data0, data1;
+
+       data0 = dsi_read(msm_host, REG_DSI_CTRL);
+       data1 = data0;
+       data1 &= ~DSI_CTRL_ENABLE;
+       dsi_write(msm_host, REG_DSI_CTRL, data1);
+       /*
+        * dsi controller need to be disabled before
+        * clocks turned on
+        */
+       wmb();
+
+       dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
+       wmb();  /* make sure clocks enabled */
+
+       /* dsi controller can only be reset while clocks are running */
+       dsi_write(msm_host, REG_DSI_RESET, 1);
+       wmb();  /* make sure reset happen */
+       dsi_write(msm_host, REG_DSI_RESET, 0);
+       wmb();  /* controller out of reset */
+       dsi_write(msm_host, REG_DSI_CTRL, data0);
+       wmb();  /* make sure dsi controller enabled again */
+}
+
+static void dsi_err_worker(struct work_struct *work)
+{
+       struct msm_dsi_host *msm_host =
+               container_of(work, struct msm_dsi_host, err_work);
+       u32 status = msm_host->err_work_state;
+
+       pr_err("%s: status=%x\n", __func__, status);
+       if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
+               dsi_sw_reset_restore(msm_host);
+
+       /* It is safe to clear here because error irq is disabled. */
+       msm_host->err_work_state = 0;
+
+       /* enable dsi error interrupt */
+       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
+}
+
+static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
+{
+       u32 status;
+
+       status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
+
+       if (status) {
+               dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
+               /* Writing of an extra 0 needed to clear error bits */
+               dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
+               msm_host->err_work_state |= DSI_ERR_STATE_ACK;
+       }
+}
+
+static void dsi_timeout_status(struct msm_dsi_host *msm_host)
+{
+       u32 status;
+
+       status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
+
+       if (status) {
+               dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
+               msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
+       }
+}
+
+static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
+{
+       u32 status;
+
+       status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
+
+       if (status) {
+               dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
+               msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
+       }
+}
+
+static void dsi_fifo_status(struct msm_dsi_host *msm_host)
+{
+       u32 status;
+
+       status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
+
+       /* fifo underflow, overflow */
+       if (status) {
+               dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
+               msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
+               if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
+                       msm_host->err_work_state |=
+                                       DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
+       }
+}
+
+static void dsi_status(struct msm_dsi_host *msm_host)
+{
+       u32 status;
+
+       status = dsi_read(msm_host, REG_DSI_STATUS0);
+
+       if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
+               dsi_write(msm_host, REG_DSI_STATUS0, status);
+               msm_host->err_work_state |=
+                       DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
+       }
+}
+
+static void dsi_clk_status(struct msm_dsi_host *msm_host)
+{
+       u32 status;
+
+       status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
+
+       if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
+               dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
+               msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
+       }
+}
+
+static void dsi_error(struct msm_dsi_host *msm_host)
+{
+       /* disable dsi error interrupt */
+       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
+
+       dsi_clk_status(msm_host);
+       dsi_fifo_status(msm_host);
+       dsi_ack_err_status(msm_host);
+       dsi_timeout_status(msm_host);
+       dsi_status(msm_host);
+       dsi_dln0_phy_err(msm_host);
+
+       queue_work(msm_host->workqueue, &msm_host->err_work);
+}
+
+static irqreturn_t dsi_host_irq(int irq, void *ptr)
+{
+       struct msm_dsi_host *msm_host = ptr;
+       u32 isr;
+       unsigned long flags;
+
+       if (!msm_host->ctrl_base)
+               return IRQ_HANDLED;
+
+       spin_lock_irqsave(&msm_host->intr_lock, flags);
+       isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
+       dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
+       spin_unlock_irqrestore(&msm_host->intr_lock, flags);
+
+       DBG("isr=0x%x, id=%d", isr, msm_host->id);
+
+       if (isr & DSI_IRQ_ERROR)
+               dsi_error(msm_host);
+
+       if (isr & DSI_IRQ_VIDEO_DONE)
+               complete(&msm_host->video_comp);
+
+       if (isr & DSI_IRQ_CMD_DMA_DONE)
+               complete(&msm_host->dma_comp);
+
+       return IRQ_HANDLED;
+}
+
+static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
+                       struct device *panel_device)
+{
+       int ret;
+
+       msm_host->disp_en_gpio = devm_gpiod_get(panel_device,
+                                               "disp-enable");
+       if (IS_ERR(msm_host->disp_en_gpio)) {
+               DBG("cannot get disp-enable-gpios %ld",
+                               PTR_ERR(msm_host->disp_en_gpio));
+               msm_host->disp_en_gpio = NULL;
+       }
+       if (msm_host->disp_en_gpio) {
+               ret = gpiod_direction_output(msm_host->disp_en_gpio, 0);
+               if (ret) {
+                       pr_err("cannot set dir to disp-en-gpios %d\n", ret);
+                       return ret;
+               }
+       }
+
+       msm_host->te_gpio = devm_gpiod_get(panel_device, "disp-te");
+       if (IS_ERR(msm_host->te_gpio)) {
+               DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
+               msm_host->te_gpio = NULL;
+       }
+
+       if (msm_host->te_gpio) {
+               ret = gpiod_direction_input(msm_host->te_gpio);
+               if (ret) {
+                       pr_err("%s: cannot set dir to disp-te-gpios, %d\n",
+                               __func__, ret);
+                       return ret;
+               }
+       }
+
+       return 0;
+}
+
+static int dsi_host_attach(struct mipi_dsi_host *host,
+                                       struct mipi_dsi_device *dsi)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+       int ret;
+
+       msm_host->channel = dsi->channel;
+       msm_host->lanes = dsi->lanes;
+       msm_host->format = dsi->format;
+       msm_host->mode_flags = dsi->mode_flags;
+
+       msm_host->panel_node = dsi->dev.of_node;
+
+       /* Some gpios defined in panel DT need to be controlled by host */
+       ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
+       if (ret)
+               return ret;
+
+       DBG("id=%d", msm_host->id);
+       if (msm_host->dev)
+               drm_helper_hpd_irq_event(msm_host->dev);
+
+       return 0;
+}
+
+static int dsi_host_detach(struct mipi_dsi_host *host,
+                                       struct mipi_dsi_device *dsi)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       msm_host->panel_node = NULL;
+
+       DBG("id=%d", msm_host->id);
+       if (msm_host->dev)
+               drm_helper_hpd_irq_event(msm_host->dev);
+
+       return 0;
+}
+
+static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
+                                       const struct mipi_dsi_msg *msg)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+       int ret;
+
+       if (!msg || !msm_host->power_on)
+               return -EINVAL;
+
+       mutex_lock(&msm_host->cmd_mutex);
+       ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
+       mutex_unlock(&msm_host->cmd_mutex);
+
+       return ret;
+}
+
+static struct mipi_dsi_host_ops dsi_host_ops = {
+       .attach = dsi_host_attach,
+       .detach = dsi_host_detach,
+       .transfer = dsi_host_transfer,
+};
+
+int msm_dsi_host_init(struct msm_dsi *msm_dsi)
+{
+       struct msm_dsi_host *msm_host = NULL;
+       struct platform_device *pdev = msm_dsi->pdev;
+       int ret;
+
+       msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
+       if (!msm_host) {
+               pr_err("%s: FAILED: cannot alloc dsi host\n",
+                      __func__);
+               ret = -ENOMEM;
+               goto fail;
+       }
+
+       ret = of_property_read_u32(pdev->dev.of_node,
+                               "qcom,dsi-host-index", &msm_host->id);
+       if (ret) {
+               dev_err(&pdev->dev,
+                       "%s: host index not specified, ret=%d\n",
+                       __func__, ret);
+               goto fail;
+       }
+       msm_host->pdev = pdev;
+
+       ret = dsi_clk_init(msm_host);
+       if (ret) {
+               pr_err("%s: unable to initialize dsi clks\n", __func__);
+               goto fail;
+       }
+
+       msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL");
+       if (IS_ERR(msm_host->ctrl_base)) {
+               pr_err("%s: unable to map Dsi ctrl base\n", __func__);
+               ret = PTR_ERR(msm_host->ctrl_base);
+               goto fail;
+       }
+
+       msm_host->cfg = dsi_get_config(msm_host);
+       if (!msm_host->cfg) {
+               ret = -EINVAL;
+               pr_err("%s: get config failed\n", __func__);
+               goto fail;
+       }
+
+       ret = dsi_regulator_init(msm_host);
+       if (ret) {
+               pr_err("%s: regulator init failed\n", __func__);
+               goto fail;
+       }
+
+       msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
+       if (!msm_host->rx_buf) {
+               pr_err("%s: alloc rx temp buf failed\n", __func__);
+               goto fail;
+       }
+
+       init_completion(&msm_host->dma_comp);
+       init_completion(&msm_host->video_comp);
+       mutex_init(&msm_host->dev_mutex);
+       mutex_init(&msm_host->cmd_mutex);
+       mutex_init(&msm_host->clk_mutex);
+       spin_lock_init(&msm_host->intr_lock);
+
+       /* setup workqueue */
+       msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
+       INIT_WORK(&msm_host->err_work, dsi_err_worker);
+
+       msm_dsi->phy = msm_dsi_phy_init(pdev, msm_host->cfg->phy_type,
+                                       msm_host->id);
+       if (!msm_dsi->phy) {
+               ret = -EINVAL;
+               pr_err("%s: phy init failed\n", __func__);
+               goto fail;
+       }
+       msm_dsi->host = &msm_host->base;
+       msm_dsi->id = msm_host->id;
+
+       DBG("Dsi Host %d initialized", msm_host->id);
+       return 0;
+
+fail:
+       return ret;
+}
+
+void msm_dsi_host_destroy(struct mipi_dsi_host *host)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       DBG("");
+       dsi_tx_buf_free(msm_host);
+       if (msm_host->workqueue) {
+               flush_workqueue(msm_host->workqueue);
+               destroy_workqueue(msm_host->workqueue);
+               msm_host->workqueue = NULL;
+       }
+
+       mutex_destroy(&msm_host->clk_mutex);
+       mutex_destroy(&msm_host->cmd_mutex);
+       mutex_destroy(&msm_host->dev_mutex);
+}
+
+int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
+                                       struct drm_device *dev)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+       struct platform_device *pdev = msm_host->pdev;
+       int ret;
+
+       msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+       if (msm_host->irq < 0) {
+               ret = msm_host->irq;
+               dev_err(dev->dev, "failed to get irq: %d\n", ret);
+               return ret;
+       }
+
+       ret = devm_request_irq(&pdev->dev, msm_host->irq,
+                       dsi_host_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+                       "dsi_isr", msm_host);
+       if (ret < 0) {
+               dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
+                               msm_host->irq, ret);
+               return ret;
+       }
+
+       msm_host->dev = dev;
+       ret = dsi_tx_buf_alloc(msm_host, SZ_4K);
+       if (ret) {
+               pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+       struct device_node *node;
+       int ret;
+
+       /* Register mipi dsi host */
+       if (!msm_host->registered) {
+               host->dev = &msm_host->pdev->dev;
+               host->ops = &dsi_host_ops;
+               ret = mipi_dsi_host_register(host);
+               if (ret)
+                       return ret;
+
+               msm_host->registered = true;
+
+               /* If the panel driver has not been probed after host register,
+                * we should defer the host's probe.
+                * It makes sure panel is connected when fbcon detects
+                * connector status and gets the proper display mode to
+                * create framebuffer.
+                */
+               if (check_defer) {
+                       node = of_get_child_by_name(msm_host->pdev->dev.of_node,
+                                                       "panel");
+                       if (node) {
+                               if (!of_drm_find_panel(node))
+                                       return -EPROBE_DEFER;
+                       }
+               }
+       }
+
+       return 0;
+}
+
+void msm_dsi_host_unregister(struct mipi_dsi_host *host)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       if (msm_host->registered) {
+               mipi_dsi_host_unregister(host);
+               host->dev = NULL;
+               host->ops = NULL;
+               msm_host->registered = false;
+       }
+}
+
+int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
+                               const struct mipi_dsi_msg *msg)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       /* TODO: make sure dsi_cmd_mdp is idle.
+        * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
+        * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
+        * How to handle the old versions? Wait for mdp cmd done?
+        */
+
+       /*
+        * mdss interrupt is generated in mdp core clock domain
+        * mdp clock need to be enabled to receive dsi interrupt
+        */
+       dsi_clk_ctrl(msm_host, 1);
+
+       /* TODO: vote for bus bandwidth */
+
+       if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
+               dsi_set_tx_power_mode(0, msm_host);
+
+       msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
+       dsi_write(msm_host, REG_DSI_CTRL,
+               msm_host->dma_cmd_ctrl_restore |
+               DSI_CTRL_CMD_MODE_EN |
+               DSI_CTRL_ENABLE);
+       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
+
+       return 0;
+}
+
+void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
+                               const struct mipi_dsi_msg *msg)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
+       dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
+
+       if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
+               dsi_set_tx_power_mode(1, msm_host);
+
+       /* TODO: unvote for bus bandwidth */
+
+       dsi_clk_ctrl(msm_host, 0);
+}
+
+int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
+                               const struct mipi_dsi_msg *msg)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       return dsi_cmds2buf_tx(msm_host, msg);
+}
+
+int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
+                               const struct mipi_dsi_msg *msg)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+       int data_byte, rx_byte, dlen, end;
+       int short_response, diff, pkt_size, ret = 0;
+       char cmd;
+       int rlen = msg->rx_len;
+       u8 *buf;
+
+       if (rlen <= 2) {
+               short_response = 1;
+               pkt_size = rlen;
+               rx_byte = 4;
+       } else {
+               short_response = 0;
+               data_byte = 10; /* first read */
+               if (rlen < data_byte)
+                       pkt_size = rlen;
+               else
+                       pkt_size = data_byte;
+               rx_byte = data_byte + 6; /* 4 header + 2 crc */
+       }
+
+       buf = msm_host->rx_buf;
+       end = 0;
+       while (!end) {
+               u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
+               struct mipi_dsi_msg max_pkt_size_msg = {
+                       .channel = msg->channel,
+                       .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
+                       .tx_len = 2,
+                       .tx_buf = tx,
+               };
+
+               DBG("rlen=%d pkt_size=%d rx_byte=%d",
+                       rlen, pkt_size, rx_byte);
+
+               ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
+               if (ret < 2) {
+                       pr_err("%s: Set max pkt size failed, %d\n",
+                               __func__, ret);
+                       return -EINVAL;
+               }
+
+               if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) &&
+                       (msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
+                       /* Clear the RDBK_DATA registers */
+                       dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
+                                       DSI_RDBK_DATA_CTRL_CLR);
+                       wmb(); /* make sure the RDBK registers are cleared */
+                       dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
+                       wmb(); /* release cleared status before transfer */
+               }
+
+               ret = dsi_cmds2buf_tx(msm_host, msg);
+               if (ret < msg->tx_len) {
+                       pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
+                       return ret;
+               }
+
+               /*
+                * once cmd_dma_done interrupt received,
+                * return data from client is ready and stored
+                * at RDBK_DATA register already
+                * since rx fifo is 16 bytes, dcs header is kept at first loop,
+                * after that dcs header lost during shift into registers
+                */
+               dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
+
+               if (dlen <= 0)
+                       return 0;
+
+               if (short_response)
+                       break;
+
+               if (rlen <= data_byte) {
+                       diff = data_byte - rlen;
+                       end = 1;
+               } else {
+                       diff = 0;
+                       rlen -= data_byte;
+               }
+
+               if (!end) {
+                       dlen -= 2; /* 2 crc */
+                       dlen -= diff;
+                       buf += dlen;    /* next start position */
+                       data_byte = 14; /* NOT first read */
+                       if (rlen < data_byte)
+                               pkt_size += rlen;
+                       else
+                               pkt_size += data_byte;
+                       DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
+               }
+       }
+
+       /*
+        * For single Long read, if the requested rlen < 10,
+        * we need to shift the start position of rx
+        * data buffer to skip the bytes which are not
+        * updated.
+        */
+       if (pkt_size < 10 && !short_response)
+               buf = msm_host->rx_buf + (10 - rlen);
+       else
+               buf = msm_host->rx_buf;
+
+       cmd = buf[0];
+       switch (cmd) {
+       case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
+               pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
+               ret = 0;
+       case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
+       case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
+               ret = dsi_short_read1_resp(buf, msg);
+               break;
+       case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
+       case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
+               ret = dsi_short_read2_resp(buf, msg);
+               break;
+       case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
+       case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
+               ret = dsi_long_read_resp(buf, msg);
+               break;
+       default:
+               pr_warn("%s:Invalid response cmd\n", __func__);
+               ret = 0;
+       }
+
+       return ret;
+}
+
+void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 iova, u32 len)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       dsi_write(msm_host, REG_DSI_DMA_BASE, iova);
+       dsi_write(msm_host, REG_DSI_DMA_LEN, len);
+       dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
+
+       /* Make sure trigger happens */
+       wmb();
+}
+
+int msm_dsi_host_enable(struct mipi_dsi_host *host)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       dsi_op_mode_config(msm_host,
+               !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
+
+       /* TODO: clock should be turned off for command mode,
+        * and only turned on before MDP START.
+        * This part of code should be enabled once mdp driver support it.
+        */
+       /* if (msm_panel->mode == MSM_DSI_CMD_MODE)
+               dsi_clk_ctrl(msm_host, 0); */
+
+       return 0;
+}
+
+int msm_dsi_host_disable(struct mipi_dsi_host *host)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       dsi_op_mode_config(msm_host,
+               !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
+
+       /* Since we have disabled INTF, the video engine won't stop so that
+        * the cmd engine will be blocked.
+        * Reset to disable video engine so that we can send off cmd.
+        */
+       dsi_sw_reset(msm_host);
+
+       return 0;
+}
+
+int msm_dsi_host_power_on(struct mipi_dsi_host *host)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+       u32 clk_pre = 0, clk_post = 0;
+       int ret = 0;
+
+       mutex_lock(&msm_host->dev_mutex);
+       if (msm_host->power_on) {
+               DBG("dsi host already on");
+               goto unlock_ret;
+       }
+
+       ret = dsi_calc_clk_rate(msm_host);
+       if (ret) {
+               pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
+               goto unlock_ret;
+       }
+
+       ret = dsi_host_regulator_enable(msm_host);
+       if (ret) {
+               pr_err("%s:Failed to enable vregs.ret=%d\n",
+                       __func__, ret);
+               goto unlock_ret;
+       }
+
+       ret = dsi_bus_clk_enable(msm_host);
+       if (ret) {
+               pr_err("%s: failed to enable bus clocks, %d\n", __func__, ret);
+               goto fail_disable_reg;
+       }
+
+       dsi_phy_sw_reset(msm_host);
+       ret = msm_dsi_manager_phy_enable(msm_host->id,
+                                       msm_host->byte_clk_rate * 8,
+                                       clk_get_rate(msm_host->esc_clk),
+                                       &clk_pre, &clk_post);
+       dsi_bus_clk_disable(msm_host);
+       if (ret) {
+               pr_err("%s: failed to enable phy, %d\n", __func__, ret);
+               goto fail_disable_reg;
+       }
+
+       ret = dsi_clk_ctrl(msm_host, 1);
+       if (ret) {
+               pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret);
+               goto fail_disable_reg;
+       }
+
+       dsi_timing_setup(msm_host);
+       dsi_sw_reset(msm_host);
+       dsi_ctrl_config(msm_host, true, clk_pre, clk_post);
+
+       if (msm_host->disp_en_gpio)
+               gpiod_set_value(msm_host->disp_en_gpio, 1);
+
+       msm_host->power_on = true;
+       mutex_unlock(&msm_host->dev_mutex);
+
+       return 0;
+
+fail_disable_reg:
+       dsi_host_regulator_disable(msm_host);
+unlock_ret:
+       mutex_unlock(&msm_host->dev_mutex);
+       return ret;
+}
+
+int msm_dsi_host_power_off(struct mipi_dsi_host *host)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       mutex_lock(&msm_host->dev_mutex);
+       if (!msm_host->power_on) {
+               DBG("dsi host already off");
+               goto unlock_ret;
+       }
+
+       dsi_ctrl_config(msm_host, false, 0, 0);
+
+       if (msm_host->disp_en_gpio)
+               gpiod_set_value(msm_host->disp_en_gpio, 0);
+
+       msm_dsi_manager_phy_disable(msm_host->id);
+
+       dsi_clk_ctrl(msm_host, 0);
+
+       dsi_host_regulator_disable(msm_host);
+
+       DBG("-");
+
+       msm_host->power_on = false;
+
+unlock_ret:
+       mutex_unlock(&msm_host->dev_mutex);
+       return 0;
+}
+
+int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
+                                       struct drm_display_mode *mode)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+       if (msm_host->mode) {
+               drm_mode_destroy(msm_host->dev, msm_host->mode);
+               msm_host->mode = NULL;
+       }
+
+       msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
+       if (IS_ERR(msm_host->mode)) {
+               pr_err("%s: cannot duplicate mode\n", __func__);
+               return PTR_ERR(msm_host->mode);
+       }
+
+       return 0;
+}
+
+struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
+                               unsigned long *panel_flags)
+{
+       struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+       struct drm_panel *panel;
+
+       panel = of_drm_find_panel(msm_host->panel_node);
+       if (panel_flags)
+                       *panel_flags = msm_host->mode_flags;
+
+       return panel;
+}
+
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
new file mode 100644 (file)
index 0000000..ee3ebca
--- /dev/null
@@ -0,0 +1,705 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "msm_kms.h"
+#include "dsi.h"
+
+struct msm_dsi_manager {
+       struct msm_dsi *dsi[DSI_MAX];
+
+       bool is_dual_panel;
+       bool is_sync_needed;
+       int master_panel_id;
+};
+
+static struct msm_dsi_manager msm_dsim_glb;
+
+#define IS_DUAL_PANEL()                (msm_dsim_glb.is_dual_panel)
+#define IS_SYNC_NEEDED()       (msm_dsim_glb.is_sync_needed)
+#define IS_MASTER_PANEL(id)    (msm_dsim_glb.master_panel_id == id)
+
+static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
+{
+       return msm_dsim_glb.dsi[id];
+}
+
+static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
+{
+       return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
+}
+
+static int dsi_mgr_parse_dual_panel(struct device_node *np, int id)
+{
+       struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
+
+       /* We assume 2 dsi nodes have the same information of dual-panel and
+        * sync-mode, and only one node specifies master in case of dual mode.
+        */
+       if (!msm_dsim->is_dual_panel)
+               msm_dsim->is_dual_panel = of_property_read_bool(
+                                               np, "qcom,dual-panel-mode");
+
+       if (msm_dsim->is_dual_panel) {
+               if (of_property_read_bool(np, "qcom,master-panel"))
+                       msm_dsim->master_panel_id = id;
+               if (!msm_dsim->is_sync_needed)
+                       msm_dsim->is_sync_needed = of_property_read_bool(
+                                       np, "qcom,sync-dual-panel");
+       }
+
+       return 0;
+}
+
+struct dsi_connector {
+       struct drm_connector base;
+       int id;
+};
+
+struct dsi_bridge {
+       struct drm_bridge base;
+       int id;
+};
+
+#define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
+#define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
+
+static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
+{
+       struct dsi_connector *dsi_connector = to_dsi_connector(connector);
+       return dsi_connector->id;
+}
+
+static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
+{
+       struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
+       return dsi_bridge->id;
+}
+
+static enum drm_connector_status dsi_mgr_connector_detect(
+               struct drm_connector *connector, bool force)
+{
+       int id = dsi_mgr_connector_get_id(connector);
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
+       struct msm_drm_private *priv = connector->dev->dev_private;
+       struct msm_kms *kms = priv->kms;
+
+       DBG("id=%d", id);
+       if (!msm_dsi->panel) {
+               msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
+                                               &msm_dsi->panel_flags);
+
+               /* There is only 1 panel in the global panel list
+                * for dual panel mode. Therefore slave dsi should get
+                * the drm_panel instance from master dsi, and
+                * keep using the panel flags got from the current DSI link.
+                */
+               if (!msm_dsi->panel && IS_DUAL_PANEL() &&
+                       !IS_MASTER_PANEL(id) && other_dsi)
+                       msm_dsi->panel = msm_dsi_host_get_panel(
+                                       other_dsi->host, NULL);
+
+               if (msm_dsi->panel && IS_DUAL_PANEL())
+                       drm_object_attach_property(&connector->base,
+                               connector->dev->mode_config.tile_property, 0);
+
+               /* Set split display info to kms once dual panel is connected
+                * to both hosts
+                */
+               if (msm_dsi->panel && IS_DUAL_PANEL() &&
+                       other_dsi && other_dsi->panel) {
+                       bool cmd_mode = !(msm_dsi->panel_flags &
+                                               MIPI_DSI_MODE_VIDEO);
+                       struct drm_encoder *encoder = msm_dsi_get_encoder(
+                                       dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
+                       struct drm_encoder *slave_enc = msm_dsi_get_encoder(
+                                       dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
+
+                       if (kms->funcs->set_split_display)
+                               kms->funcs->set_split_display(kms, encoder,
+                                                       slave_enc, cmd_mode);
+                       else
+                               pr_err("mdp does not support dual panel\n");
+               }
+       }
+
+       return msm_dsi->panel ? connector_status_connected :
+               connector_status_disconnected;
+}
+
+static void dsi_mgr_connector_destroy(struct drm_connector *connector)
+{
+       DBG("");
+       drm_connector_unregister(connector);
+       drm_connector_cleanup(connector);
+}
+
+static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
+{
+       struct drm_display_mode *mode, *m;
+
+       /* Only support left-right mode */
+       list_for_each_entry_safe(mode, m, &connector->probed_modes, head) {
+               mode->clock >>= 1;
+               mode->hdisplay >>= 1;
+               mode->hsync_start >>= 1;
+               mode->hsync_end >>= 1;
+               mode->htotal >>= 1;
+               drm_mode_set_name(mode);
+       }
+}
+
+static int dsi_dual_connector_tile_init(
+                       struct drm_connector *connector, int id)
+{
+       struct drm_display_mode *mode;
+       /* Fake topology id */
+       char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'};
+
+       if (connector->tile_group) {
+               DBG("Tile property has been initialized");
+               return 0;
+       }
+
+       /* Use the first mode only for now */
+       mode = list_first_entry(&connector->probed_modes,
+                               struct drm_display_mode,
+                               head);
+       if (!mode)
+               return -EINVAL;
+
+       connector->tile_group = drm_mode_get_tile_group(
+                                       connector->dev, topo_id);
+       if (!connector->tile_group)
+               connector->tile_group = drm_mode_create_tile_group(
+                                       connector->dev, topo_id);
+       if (!connector->tile_group) {
+               pr_err("%s: failed to create tile group\n", __func__);
+               return -ENOMEM;
+       }
+
+       connector->has_tile = true;
+       connector->tile_is_single_monitor = true;
+
+       /* mode has been fixed */
+       connector->tile_h_size = mode->hdisplay;
+       connector->tile_v_size = mode->vdisplay;
+
+       /* Only support left-right mode */
+       connector->num_h_tile = 2;
+       connector->num_v_tile = 1;
+
+       connector->tile_v_loc = 0;
+       connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0;
+
+       return 0;
+}
+
+static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
+{
+       int id = dsi_mgr_connector_get_id(connector);
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct drm_panel *panel = msm_dsi->panel;
+       int ret, num;
+
+       if (!panel)
+               return 0;
+
+       /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode,
+        * panel should not attach to any connector.
+        * Only temporarily attach panel to the current connector here,
+        * to let panel set mode to this connector.
+        */
+       drm_panel_attach(panel, connector);
+       num = drm_panel_get_modes(panel);
+       drm_panel_detach(panel);
+       if (!num)
+               return 0;
+
+       if (IS_DUAL_PANEL()) {
+               /* report half resolution to user */
+               dsi_dual_connector_fix_modes(connector);
+               ret = dsi_dual_connector_tile_init(connector, id);
+               if (ret)
+                       return ret;
+               ret = drm_mode_connector_set_tile_property(connector);
+               if (ret) {
+                       pr_err("%s: set tile property failed, %d\n",
+                                       __func__, ret);
+                       return ret;
+               }
+       }
+
+       return num;
+}
+
+static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
+                               struct drm_display_mode *mode)
+{
+       int id = dsi_mgr_connector_get_id(connector);
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
+       struct msm_drm_private *priv = connector->dev->dev_private;
+       struct msm_kms *kms = priv->kms;
+       long actual, requested;
+
+       DBG("");
+       requested = 1000 * mode->clock;
+       actual = kms->funcs->round_pixclk(kms, requested, encoder);
+
+       DBG("requested=%ld, actual=%ld", requested, actual);
+       if (actual != requested)
+               return MODE_CLOCK_RANGE;
+
+       return MODE_OK;
+}
+
+static struct drm_encoder *
+dsi_mgr_connector_best_encoder(struct drm_connector *connector)
+{
+       int id = dsi_mgr_connector_get_id(connector);
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+
+       DBG("");
+       return msm_dsi_get_encoder(msm_dsi);
+}
+
+static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
+{
+       int id = dsi_mgr_bridge_get_id(bridge);
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
+       struct mipi_dsi_host *host = msm_dsi->host;
+       struct drm_panel *panel = msm_dsi->panel;
+       bool is_dual_panel = IS_DUAL_PANEL();
+       int ret;
+
+       DBG("id=%d", id);
+       if (!panel || (is_dual_panel && (DSI_1 == id)))
+               return;
+
+       ret = msm_dsi_host_power_on(host);
+       if (ret) {
+               pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
+               goto host_on_fail;
+       }
+
+       if (is_dual_panel && msm_dsi1) {
+               ret = msm_dsi_host_power_on(msm_dsi1->host);
+               if (ret) {
+                       pr_err("%s: power on host1 failed, %d\n",
+                                                       __func__, ret);
+                       goto host1_on_fail;
+               }
+       }
+
+       /* Always call panel functions once, because even for dual panels,
+        * there is only one drm_panel instance.
+        */
+       ret = drm_panel_prepare(panel);
+       if (ret) {
+               pr_err("%s: prepare panel %d failed, %d\n", __func__, id, ret);
+               goto panel_prep_fail;
+       }
+
+       ret = msm_dsi_host_enable(host);
+       if (ret) {
+               pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
+               goto host_en_fail;
+       }
+
+       if (is_dual_panel && msm_dsi1) {
+               ret = msm_dsi_host_enable(msm_dsi1->host);
+               if (ret) {
+                       pr_err("%s: enable host1 failed, %d\n", __func__, ret);
+                       goto host1_en_fail;
+               }
+       }
+
+       ret = drm_panel_enable(panel);
+       if (ret) {
+               pr_err("%s: enable panel %d failed, %d\n", __func__, id, ret);
+               goto panel_en_fail;
+       }
+
+       return;
+
+panel_en_fail:
+       if (is_dual_panel && msm_dsi1)
+               msm_dsi_host_disable(msm_dsi1->host);
+host1_en_fail:
+       msm_dsi_host_disable(host);
+host_en_fail:
+       drm_panel_unprepare(panel);
+panel_prep_fail:
+       if (is_dual_panel && msm_dsi1)
+               msm_dsi_host_power_off(msm_dsi1->host);
+host1_on_fail:
+       msm_dsi_host_power_off(host);
+host_on_fail:
+       return;
+}
+
+static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
+{
+       DBG("");
+}
+
+static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
+{
+       DBG("");
+}
+
+static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
+{
+       int id = dsi_mgr_bridge_get_id(bridge);
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
+       struct mipi_dsi_host *host = msm_dsi->host;
+       struct drm_panel *panel = msm_dsi->panel;
+       bool is_dual_panel = IS_DUAL_PANEL();
+       int ret;
+
+       DBG("id=%d", id);
+
+       if (!panel || (is_dual_panel && (DSI_1 == id)))
+               return;
+
+       ret = drm_panel_disable(panel);
+       if (ret)
+               pr_err("%s: Panel %d OFF failed, %d\n", __func__, id, ret);
+
+       ret = msm_dsi_host_disable(host);
+       if (ret)
+               pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
+
+       if (is_dual_panel && msm_dsi1) {
+               ret = msm_dsi_host_disable(msm_dsi1->host);
+               if (ret)
+                       pr_err("%s: host1 disable failed, %d\n", __func__, ret);
+       }
+
+       ret = drm_panel_unprepare(panel);
+       if (ret)
+               pr_err("%s: Panel %d unprepare failed,%d\n", __func__, id, ret);
+
+       ret = msm_dsi_host_power_off(host);
+       if (ret)
+               pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
+
+       if (is_dual_panel && msm_dsi1) {
+               ret = msm_dsi_host_power_off(msm_dsi1->host);
+               if (ret)
+                       pr_err("%s: host1 power off failed, %d\n",
+                                                               __func__, ret);
+       }
+}
+
+static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
+               struct drm_display_mode *mode,
+               struct drm_display_mode *adjusted_mode)
+{
+       int id = dsi_mgr_bridge_get_id(bridge);
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
+       struct mipi_dsi_host *host = msm_dsi->host;
+       bool is_dual_panel = IS_DUAL_PANEL();
+
+       DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
+                       mode->base.id, mode->name,
+                       mode->vrefresh, mode->clock,
+                       mode->hdisplay, mode->hsync_start,
+                       mode->hsync_end, mode->htotal,
+                       mode->vdisplay, mode->vsync_start,
+                       mode->vsync_end, mode->vtotal,
+                       mode->type, mode->flags);
+
+       if (is_dual_panel && (DSI_1 == id))
+               return;
+
+       msm_dsi_host_set_display_mode(host, adjusted_mode);
+       if (is_dual_panel && other_dsi)
+               msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
+}
+
+static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
+       .dpms = drm_atomic_helper_connector_dpms,
+       .detect = dsi_mgr_connector_detect,
+       .fill_modes = drm_helper_probe_single_connector_modes,
+       .destroy = dsi_mgr_connector_destroy,
+       .reset = drm_atomic_helper_connector_reset,
+       .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+       .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
+       .get_modes = dsi_mgr_connector_get_modes,
+       .mode_valid = dsi_mgr_connector_mode_valid,
+       .best_encoder = dsi_mgr_connector_best_encoder,
+};
+
+static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
+       .pre_enable = dsi_mgr_bridge_pre_enable,
+       .enable = dsi_mgr_bridge_enable,
+       .disable = dsi_mgr_bridge_disable,
+       .post_disable = dsi_mgr_bridge_post_disable,
+       .mode_set = dsi_mgr_bridge_mode_set,
+};
+
+/* initialize connector */
+struct drm_connector *msm_dsi_manager_connector_init(u8 id)
+{
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct drm_connector *connector = NULL;
+       struct dsi_connector *dsi_connector;
+       int ret;
+
+       dsi_connector = devm_kzalloc(msm_dsi->dev->dev,
+                               sizeof(*dsi_connector), GFP_KERNEL);
+       if (!dsi_connector) {
+               ret = -ENOMEM;
+               goto fail;
+       }
+
+       dsi_connector->id = id;
+
+       connector = &dsi_connector->base;
+
+       ret = drm_connector_init(msm_dsi->dev, connector,
+                       &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
+       if (ret)
+               goto fail;
+
+       drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
+
+       /* Enable HPD to let hpd event is handled
+        * when panel is attached to the host.
+        */
+       connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+       /* Display driver doesn't support interlace now. */
+       connector->interlace_allowed = 0;
+       connector->doublescan_allowed = 0;
+
+       ret = drm_connector_register(connector);
+       if (ret)
+               goto fail;
+
+       return connector;
+
+fail:
+       if (connector)
+               dsi_mgr_connector_destroy(connector);
+
+       return ERR_PTR(ret);
+}
+
+/* initialize bridge */
+struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
+{
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct drm_bridge *bridge = NULL;
+       struct dsi_bridge *dsi_bridge;
+       int ret;
+
+       dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
+                               sizeof(*dsi_bridge), GFP_KERNEL);
+       if (!dsi_bridge) {
+               ret = -ENOMEM;
+               goto fail;
+       }
+
+       dsi_bridge->id = id;
+
+       bridge = &dsi_bridge->base;
+       bridge->funcs = &dsi_mgr_bridge_funcs;
+
+       ret = drm_bridge_attach(msm_dsi->dev, bridge);
+       if (ret)
+               goto fail;
+
+       return bridge;
+
+fail:
+       if (bridge)
+               msm_dsi_manager_bridge_destroy(bridge);
+
+       return ERR_PTR(ret);
+}
+
+void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
+{
+}
+
+int msm_dsi_manager_phy_enable(int id,
+               const unsigned long bit_rate, const unsigned long esc_rate,
+               u32 *clk_pre, u32 *clk_post)
+{
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi_phy *phy = msm_dsi->phy;
+       int ret;
+
+       ret = msm_dsi_phy_enable(phy, IS_DUAL_PANEL(), bit_rate, esc_rate);
+       if (ret)
+               return ret;
+
+       msm_dsi->phy_enabled = true;
+       msm_dsi_phy_get_clk_pre_post(phy, clk_pre, clk_post);
+
+       return 0;
+}
+
+void msm_dsi_manager_phy_disable(int id)
+{
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
+       struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
+       struct msm_dsi_phy *phy = msm_dsi->phy;
+
+       /* disable DSI phy
+        * In dual-dsi configuration, the phy should be disabled for the
+        * first controller only when the second controller is disabled.
+        */
+       msm_dsi->phy_enabled = false;
+       if (IS_DUAL_PANEL() && mdsi && sdsi) {
+               if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
+                       msm_dsi_phy_disable(sdsi->phy);
+                       msm_dsi_phy_disable(mdsi->phy);
+               }
+       } else {
+               msm_dsi_phy_disable(phy);
+       }
+}
+
+int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
+{
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
+       struct mipi_dsi_host *host = msm_dsi->host;
+       bool is_read = (msg->rx_buf && msg->rx_len);
+       bool need_sync = (IS_SYNC_NEEDED() && !is_read);
+       int ret;
+
+       if (!msg->tx_buf || !msg->tx_len)
+               return 0;
+
+       /* In dual master case, panel requires the same commands sent to
+        * both DSI links. Host issues the command trigger to both links
+        * when DSI_1 calls the cmd transfer function, no matter it happens
+        * before or after DSI_0 cmd transfer.
+        */
+       if (need_sync && (id == DSI_0))
+               return is_read ? msg->rx_len : msg->tx_len;
+
+       if (need_sync && msm_dsi0) {
+               ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
+               if (ret) {
+                       pr_err("%s: failed to prepare non-trigger host, %d\n",
+                               __func__, ret);
+                       return ret;
+               }
+       }
+       ret = msm_dsi_host_xfer_prepare(host, msg);
+       if (ret) {
+               pr_err("%s: failed to prepare host, %d\n", __func__, ret);
+               goto restore_host0;
+       }
+
+       ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
+                       msm_dsi_host_cmd_tx(host, msg);
+
+       msm_dsi_host_xfer_restore(host, msg);
+
+restore_host0:
+       if (need_sync && msm_dsi0)
+               msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
+
+       return ret;
+}
+
+bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 iova, u32 len)
+{
+       struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
+       struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
+       struct mipi_dsi_host *host = msm_dsi->host;
+
+       if (IS_SYNC_NEEDED() && (id == DSI_0))
+               return false;
+
+       if (IS_SYNC_NEEDED() && msm_dsi0)
+               msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, iova, len);
+
+       msm_dsi_host_cmd_xfer_commit(host, iova, len);
+
+       return true;
+}
+
+int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
+{
+       struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
+       int id = msm_dsi->id;
+       struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
+       int ret;
+
+       if (id > DSI_MAX) {
+               pr_err("%s: invalid id %d\n", __func__, id);
+               return -EINVAL;
+       }
+
+       if (msm_dsim->dsi[id]) {
+               pr_err("%s: dsi%d already registered\n", __func__, id);
+               return -EBUSY;
+       }
+
+       msm_dsim->dsi[id] = msm_dsi;
+
+       ret = dsi_mgr_parse_dual_panel(msm_dsi->pdev->dev.of_node, id);
+       if (ret) {
+               pr_err("%s: failed to parse dual panel info\n", __func__);
+               return ret;
+       }
+
+       if (!IS_DUAL_PANEL()) {
+               ret = msm_dsi_host_register(msm_dsi->host, true);
+       } else if (!other_dsi) {
+               return 0;
+       } else {
+               struct msm_dsi *mdsi = IS_MASTER_PANEL(id) ?
+                                       msm_dsi : other_dsi;
+               struct msm_dsi *sdsi = IS_MASTER_PANEL(id) ?
+                                       other_dsi : msm_dsi;
+               /* Register slave host first, so that slave DSI device
+                * has a chance to probe, and do not block the master
+                * DSI device's probe.
+                * Also, do not check defer for the slave host,
+                * because only master DSI device adds the panel to global
+                * panel list. The panel's device is the master DSI device.
+                */
+               ret = msm_dsi_host_register(sdsi->host, false);
+               if (ret)
+                       return ret;
+               ret = msm_dsi_host_register(mdsi->host, true);
+       }
+
+       return ret;
+}
+
+void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
+{
+       struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
+
+       if (msm_dsi->host)
+               msm_dsi_host_unregister(msm_dsi->host);
+       msm_dsim->dsi[msm_dsi->id] = NULL;
+}
+
diff --git a/drivers/gpu/drm/msm/dsi/dsi_phy.c b/drivers/gpu/drm/msm/dsi/dsi_phy.c
new file mode 100644 (file)
index 0000000..f0cea89
--- /dev/null
@@ -0,0 +1,352 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "dsi.h"
+#include "dsi.xml.h"
+
+#define dsi_phy_read(offset) msm_readl((offset))
+#define dsi_phy_write(offset, data) msm_writel((data), (offset))
+
+struct dsi_dphy_timing {
+       u32 clk_pre;
+       u32 clk_post;
+       u32 clk_zero;
+       u32 clk_trail;
+       u32 clk_prepare;
+       u32 hs_exit;
+       u32 hs_zero;
+       u32 hs_prepare;
+       u32 hs_trail;
+       u32 hs_rqst;
+       u32 ta_go;
+       u32 ta_sure;
+       u32 ta_get;
+};
+
+struct msm_dsi_phy {
+       void __iomem *base;
+       void __iomem *reg_base;
+       int id;
+       struct dsi_dphy_timing timing;
+       int (*enable)(struct msm_dsi_phy *phy, bool is_dual_panel,
+               const unsigned long bit_rate, const unsigned long esc_rate);
+       int (*disable)(struct msm_dsi_phy *phy);
+};
+
+#define S_DIV_ROUND_UP(n, d)   \
+       (((n) >= 0) ? (((n) + (d) - 1) / (d)) : (((n) - (d) + 1) / (d)))
+
+static inline s32 linear_inter(s32 tmax, s32 tmin, s32 percent,
+                               s32 min_result, bool even)
+{
+       s32 v;
+       v = (tmax - tmin) * percent;
+       v = S_DIV_ROUND_UP(v, 100) + tmin;
+       if (even && (v & 0x1))
+               return max_t(s32, min_result, v - 1);
+       else
+               return max_t(s32, min_result, v);
+}
+
+static void dsi_dphy_timing_calc_clk_zero(struct dsi_dphy_timing *timing,
+                                       s32 ui, s32 coeff, s32 pcnt)
+{
+       s32 tmax, tmin, clk_z;
+       s32 temp;
+
+       /* reset */
+       temp = 300 * coeff - ((timing->clk_prepare >> 1) + 1) * 2 * ui;
+       tmin = S_DIV_ROUND_UP(temp, ui) - 2;
+       if (tmin > 255) {
+               tmax = 511;
+               clk_z = linear_inter(2 * tmin, tmin, pcnt, 0, true);
+       } else {
+               tmax = 255;
+               clk_z = linear_inter(tmax, tmin, pcnt, 0, true);
+       }
+
+       /* adjust */
+       temp = (timing->hs_rqst + timing->clk_prepare + clk_z) & 0x7;
+       timing->clk_zero = clk_z + 8 - temp;
+}
+
+static int dsi_dphy_timing_calc(struct dsi_dphy_timing *timing,
+       const unsigned long bit_rate, const unsigned long esc_rate)
+{
+       s32 ui, lpx;
+       s32 tmax, tmin;
+       s32 pcnt0 = 10;
+       s32 pcnt1 = (bit_rate > 1200000000) ? 15 : 10;
+       s32 pcnt2 = 10;
+       s32 pcnt3 = (bit_rate > 180000000) ? 10 : 40;
+       s32 coeff = 1000; /* Precision, should avoid overflow */
+       s32 temp;
+
+       if (!bit_rate || !esc_rate)
+               return -EINVAL;
+
+       ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
+       lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000);
+
+       tmax = S_DIV_ROUND_UP(95 * coeff, ui) - 2;
+       tmin = S_DIV_ROUND_UP(38 * coeff, ui) - 2;
+       timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, true);
+
+       temp = lpx / ui;
+       if (temp & 0x1)
+               timing->hs_rqst = temp;
+       else
+               timing->hs_rqst = max_t(s32, 0, temp - 2);
+
+       /* Calculate clk_zero after clk_prepare and hs_rqst */
+       dsi_dphy_timing_calc_clk_zero(timing, ui, coeff, pcnt2);
+
+       temp = 105 * coeff + 12 * ui - 20 * coeff;
+       tmax = S_DIV_ROUND_UP(temp, ui) - 2;
+       tmin = S_DIV_ROUND_UP(60 * coeff, ui) - 2;
+       timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, true);
+
+       temp = 85 * coeff + 6 * ui;
+       tmax = S_DIV_ROUND_UP(temp, ui) - 2;
+       temp = 40 * coeff + 4 * ui;
+       tmin = S_DIV_ROUND_UP(temp, ui) - 2;
+       timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, true);
+
+       tmax = 255;
+       temp = ((timing->hs_prepare >> 1) + 1) * 2 * ui + 2 * ui;
+       temp = 145 * coeff + 10 * ui - temp;
+       tmin = S_DIV_ROUND_UP(temp, ui) - 2;
+       timing->hs_zero = linear_inter(tmax, tmin, pcnt2, 24, true);
+
+       temp = 105 * coeff + 12 * ui - 20 * coeff;
+       tmax = S_DIV_ROUND_UP(temp, ui) - 2;
+       temp = 60 * coeff + 4 * ui;
+       tmin = DIV_ROUND_UP(temp, ui) - 2;
+       timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, true);
+
+       tmax = 255;
+       tmin = S_DIV_ROUND_UP(100 * coeff, ui) - 2;
+       timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, true);
+
+       tmax = 63;
+       temp = ((timing->hs_exit >> 1) + 1) * 2 * ui;
+       temp = 60 * coeff + 52 * ui - 24 * ui - temp;
+       tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1;
+       timing->clk_post = linear_inter(tmax, tmin, pcnt2, 0, false);
+
+       tmax = 63;
+       temp = ((timing->clk_prepare >> 1) + 1) * 2 * ui;
+       temp += ((timing->clk_zero >> 1) + 1) * 2 * ui;
+       temp += 8 * ui + lpx;
+       tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1;
+       if (tmin > tmax) {
+               temp = linear_inter(2 * tmax, tmin, pcnt2, 0, false) >> 1;
+               timing->clk_pre = temp >> 1;
+               temp = (2 * tmax - tmin) * pcnt2;
+       } else {
+               timing->clk_pre = linear_inter(tmax, tmin, pcnt2, 0, false);
+       }
+
+       timing->ta_go = 3;
+       timing->ta_sure = 0;
+       timing->ta_get = 4;
+
+       DBG("PHY timings: %d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
+               timing->clk_pre, timing->clk_post, timing->clk_zero,
+               timing->clk_trail, timing->clk_prepare, timing->hs_exit,
+               timing->hs_zero, timing->hs_prepare, timing->hs_trail,
+               timing->hs_rqst);
+
+       return 0;
+}
+
+static void dsi_28nm_phy_regulator_ctrl(struct msm_dsi_phy *phy, bool enable)
+{
+       void __iomem *base = phy->reg_base;
+
+       if (!enable) {
+               dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 0);
+               return;
+       }
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x0);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 1);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_5, 0);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_3, 0);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_2, 0x3);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_1, 0x9);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x7);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_4, 0x20);
+}
+
+static int dsi_28nm_phy_enable(struct msm_dsi_phy *phy, bool is_dual_panel,
+               const unsigned long bit_rate, const unsigned long esc_rate)
+{
+       struct dsi_dphy_timing *timing = &phy->timing;
+       int i;
+       void __iomem *base = phy->base;
+
+       DBG("");
+
+       if (dsi_dphy_timing_calc(timing, bit_rate, esc_rate)) {
+               pr_err("%s: D-PHY timing calculation failed\n", __func__);
+               return -EINVAL;
+       }
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_0, 0xff);
+
+       dsi_28nm_phy_regulator_ctrl(phy, true);
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LDO_CNTRL, 0x00);
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_0,
+               DSI_28nm_PHY_TIMING_CTRL_0_CLK_ZERO(timing->clk_zero));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_1,
+               DSI_28nm_PHY_TIMING_CTRL_1_CLK_TRAIL(timing->clk_trail));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_2,
+               DSI_28nm_PHY_TIMING_CTRL_2_CLK_PREPARE(timing->clk_prepare));
+       if (timing->clk_zero & BIT(8))
+               dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_3,
+                       DSI_28nm_PHY_TIMING_CTRL_3_CLK_ZERO_8);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_4,
+               DSI_28nm_PHY_TIMING_CTRL_4_HS_EXIT(timing->hs_exit));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_5,
+               DSI_28nm_PHY_TIMING_CTRL_5_HS_ZERO(timing->hs_zero));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_6,
+               DSI_28nm_PHY_TIMING_CTRL_6_HS_PREPARE(timing->hs_prepare));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_7,
+               DSI_28nm_PHY_TIMING_CTRL_7_HS_TRAIL(timing->hs_trail));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_8,
+               DSI_28nm_PHY_TIMING_CTRL_8_HS_RQST(timing->hs_rqst));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_9,
+               DSI_28nm_PHY_TIMING_CTRL_9_TA_GO(timing->ta_go) |
+               DSI_28nm_PHY_TIMING_CTRL_9_TA_SURE(timing->ta_sure));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_10,
+               DSI_28nm_PHY_TIMING_CTRL_10_TA_GET(timing->ta_get));
+       dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_11,
+               DSI_28nm_PHY_TIMING_CTRL_11_TRIG3_CMD(0));
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_1, 0x00);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f);
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_1, 0x6);
+
+       for (i = 0; i < 4; i++) {
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_0(i), 0);
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_1(i), 0);
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_2(i), 0);
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_3(i), 0);
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_DATAPATH(i), 0);
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_DEBUG_SEL(i), 0);
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_0(i), 0x1);
+               dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_1(i), 0x97);
+       }
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(0), 0);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(1), 0x5);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(2), 0xa);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(3), 0xf);
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_CFG_1, 0xc0);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR0, 0x1);
+       dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR1, 0xbb);
+
+       dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f);
+
+       if (is_dual_panel && (phy->id != DSI_CLOCK_MASTER))
+               dsi_phy_write(base + REG_DSI_28nm_PHY_GLBL_TEST_CTRL, 0x00);
+       else
+               dsi_phy_write(base + REG_DSI_28nm_PHY_GLBL_TEST_CTRL, 0x01);
+
+       return 0;
+}
+
+static int dsi_28nm_phy_disable(struct msm_dsi_phy *phy)
+{
+       dsi_phy_write(phy->base + REG_DSI_28nm_PHY_CTRL_0, 0);
+       dsi_28nm_phy_regulator_ctrl(phy, false);
+
+       /*
+        * Wait for the registers writes to complete in order to
+        * ensure that the phy is completely disabled
+        */
+       wmb();
+
+       return 0;
+}
+
+#define dsi_phy_func_init(name)        \
+       do {    \
+               phy->enable = dsi_##name##_phy_enable;  \
+               phy->disable = dsi_##name##_phy_disable;        \
+       } while (0)
+
+struct msm_dsi_phy *msm_dsi_phy_init(struct platform_device *pdev,
+                       enum msm_dsi_phy_type type, int id)
+{
+       struct msm_dsi_phy *phy;
+
+       phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
+       if (!phy)
+               return NULL;
+
+       phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
+       if (IS_ERR_OR_NULL(phy->base)) {
+               pr_err("%s: failed to map phy base\n", __func__);
+               return NULL;
+       }
+       phy->reg_base = msm_ioremap(pdev, "dsi_phy_regulator", "DSI_PHY_REG");
+       if (IS_ERR_OR_NULL(phy->reg_base)) {
+               pr_err("%s: failed to map phy regulator base\n", __func__);
+               return NULL;
+       }
+
+       switch (type) {
+       case MSM_DSI_PHY_28NM:
+               dsi_phy_func_init(28nm);
+               break;
+       default:
+               pr_err("%s: unsupported type, %d\n", __func__, type);
+               return NULL;
+       }
+
+       phy->id = id;
+
+       return phy;
+}
+
+int msm_dsi_phy_enable(struct msm_dsi_phy *phy, bool is_dual_panel,
+       const unsigned long bit_rate, const unsigned long esc_rate)
+{
+       if (!phy || !phy->enable)
+               return -EINVAL;
+       return phy->enable(phy, is_dual_panel, bit_rate, esc_rate);
+}
+
+int msm_dsi_phy_disable(struct msm_dsi_phy *phy)
+{
+       if (!phy || !phy->disable)
+               return -EINVAL;
+       return phy->disable(phy);
+}
+
+void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy,
+       u32 *clk_pre, u32 *clk_post)
+{
+       if (!phy)
+               return;
+       if (clk_pre)
+               *clk_pre = phy->timing.clk_pre;
+       if (clk_post)
+               *clk_post = phy->timing.clk_post;
+}
+
index 9e8d441b61c37f2abe0f14bb16a45bda717ba3c3..04db4bd1b5b614b31905b66e56d4388938df19e1 100644 (file)
@@ -82,6 +82,9 @@ struct msm_drm_private {
         */
        struct msm_edp *edp;
 
+       /* DSI is shared by mdp4 and mdp5 */
+       struct msm_dsi *dsi[2];
+
        /* when we have more than one 'msm_gpu' these need to be an array: */
        struct msm_gpu *gpu;
        struct msm_file_private *lastctx;
@@ -236,6 +239,32 @@ void __exit msm_edp_unregister(void);
 int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev,
                struct drm_encoder *encoder);
 
+struct msm_dsi;
+enum msm_dsi_encoder_id {
+       MSM_DSI_VIDEO_ENCODER_ID = 0,
+       MSM_DSI_CMD_ENCODER_ID = 1,
+       MSM_DSI_ENCODER_NUM = 2
+};
+#ifdef CONFIG_DRM_MSM_DSI
+void __init msm_dsi_register(void);
+void __exit msm_dsi_unregister(void);
+int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
+               struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM]);
+#else
+static inline void __init msm_dsi_register(void)
+{
+}
+static inline void __exit msm_dsi_unregister(void)
+{
+}
+static inline int msm_dsi_modeset_init(struct msm_dsi *msm_dsi,
+               struct drm_device *dev,
+               struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM])
+{
+       return -EINVAL;
+}
+#endif
+
 #ifdef CONFIG_DEBUG_FS
 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m);
 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m);