drm/panel: add Innolux P079ZCA panel driver
authorChris Zhong <zyw@rock-chips.com>
Fri, 24 Mar 2017 00:51:32 +0000 (08:51 +0800)
committerThierry Reding <treding@nvidia.com>
Wed, 14 Jun 2017 17:31:45 +0000 (19:31 +0200)
Support Innolux P079ZCA 7.85" 768x1024 TFT LCD panel, it is a MIPI DSI
panel.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1490316692-20506-2-git-send-email-zyw@rock-chips.com
drivers/gpu/drm/panel/Kconfig
drivers/gpu/drm/panel/Makefile
drivers/gpu/drm/panel/panel-innolux-p079zca.c [new file with mode: 0644]

index 3e29a9903303eb6c3f916bbfc3a06c538880d1b3..9334d86b0da350126b92855502e5b6b49ae43123 100644 (file)
@@ -28,6 +28,17 @@ config DRM_PANEL_SIMPLE
          that it can be automatically turned off when the panel goes into a
          low power state.
 
+config DRM_PANEL_INNOLUX_P079ZCA
+       tristate "Innolux P079ZCA panel"
+       depends on OF
+       depends on DRM_MIPI_DSI
+       depends on BACKLIGHT_CLASS_DEVICE
+       help
+         Say Y here if you want to enable support for Innolux P079ZCA
+         TFT-LCD modules. The panel has a 1024x768 resolution and uses
+         24 bit RGB per pixel. It provides a MIPI DSI interface to
+         the host and has a built-in LED backlight.
+
 config DRM_PANEL_JDI_LT070ME05000
        tristate "JDI LT070ME05000 WUXGA DSI panel"
        depends on OF
index 292b3c77aede43fd8239a4b0a90571d68f83ace0..9f6610d08b009e99b18034a3bdd4656832c1f695 100644 (file)
@@ -1,5 +1,6 @@
 obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
 obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
new file mode 100644 (file)
index 0000000..6ba9344
--- /dev/null
@@ -0,0 +1,340 @@
+/*
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/backlight.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+struct innolux_panel {
+       struct drm_panel base;
+       struct mipi_dsi_device *link;
+
+       struct backlight_device *backlight;
+       struct regulator *supply;
+       struct gpio_desc *enable_gpio;
+
+       bool prepared;
+       bool enabled;
+};
+
+static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
+{
+       return container_of(panel, struct innolux_panel, base);
+}
+
+static int innolux_panel_disable(struct drm_panel *panel)
+{
+       struct innolux_panel *innolux = to_innolux_panel(panel);
+       int err;
+
+       if (!innolux->enabled)
+               return 0;
+
+       innolux->backlight->props.power = FB_BLANK_POWERDOWN;
+       backlight_update_status(innolux->backlight);
+
+       err = mipi_dsi_dcs_set_display_off(innolux->link);
+       if (err < 0)
+               DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
+                             err);
+
+       innolux->enabled = false;
+
+       return 0;
+}
+
+static int innolux_panel_unprepare(struct drm_panel *panel)
+{
+       struct innolux_panel *innolux = to_innolux_panel(panel);
+       int err;
+
+       if (!innolux->prepared)
+               return 0;
+
+       err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
+       if (err < 0) {
+               DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
+                             err);
+               return err;
+       }
+
+       gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+
+       /* T8: 80ms - 1000ms */
+       msleep(80);
+
+       err = regulator_disable(innolux->supply);
+       if (err < 0)
+               return err;
+
+       innolux->prepared = false;
+
+       return 0;
+}
+
+static int innolux_panel_prepare(struct drm_panel *panel)
+{
+       struct innolux_panel *innolux = to_innolux_panel(panel);
+       int err, regulator_err;
+
+       if (innolux->prepared)
+               return 0;
+
+       gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+
+       err = regulator_enable(innolux->supply);
+       if (err < 0)
+               return err;
+
+       /* T2: 15ms - 1000ms */
+       usleep_range(15000, 16000);
+
+       gpiod_set_value_cansleep(innolux->enable_gpio, 1);
+
+       /* T4: 15ms - 1000ms */
+       usleep_range(15000, 16000);
+
+       err = mipi_dsi_dcs_exit_sleep_mode(innolux->link);
+       if (err < 0) {
+               DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n",
+                             err);
+               goto poweroff;
+       }
+
+       /* T6: 120ms - 1000ms*/
+       msleep(120);
+
+       err = mipi_dsi_dcs_set_display_on(innolux->link);
+       if (err < 0) {
+               DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n",
+                             err);
+               goto poweroff;
+       }
+
+       /* T7: 5ms */
+       usleep_range(5000, 6000);
+
+       innolux->prepared = true;
+
+       return 0;
+
+poweroff:
+       regulator_err = regulator_disable(innolux->supply);
+       if (regulator_err)
+               DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
+                             regulator_err);
+
+       gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+       return err;
+}
+
+static int innolux_panel_enable(struct drm_panel *panel)
+{
+       struct innolux_panel *innolux = to_innolux_panel(panel);
+       int ret;
+
+       if (innolux->enabled)
+               return 0;
+
+       innolux->backlight->props.power = FB_BLANK_UNBLANK;
+       ret = backlight_update_status(innolux->backlight);
+       if (ret) {
+               DRM_DEV_ERROR(panel->drm->dev,
+                             "Failed to enable backlight %d\n", ret);
+               return ret;
+       }
+
+       innolux->enabled = true;
+
+       return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+       .clock = 56900,
+       .hdisplay = 768,
+       .hsync_start = 768 + 40,
+       .hsync_end = 768 + 40 + 40,
+       .htotal = 768 + 40 + 40 + 40,
+       .vdisplay = 1024,
+       .vsync_start = 1024 + 20,
+       .vsync_end = 1024 + 20 + 4,
+       .vtotal = 1024 + 20 + 4 + 20,
+       .vrefresh = 60,
+};
+
+static int innolux_panel_get_modes(struct drm_panel *panel)
+{
+       struct drm_display_mode *mode;
+
+       mode = drm_mode_duplicate(panel->drm, &default_mode);
+       if (!mode) {
+               DRM_DEV_ERROR(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
+                             default_mode.hdisplay, default_mode.vdisplay,
+                             default_mode.vrefresh);
+               return -ENOMEM;
+       }
+
+       drm_mode_set_name(mode);
+
+       drm_mode_probed_add(panel->connector, mode);
+
+       panel->connector->display_info.width_mm = 120;
+       panel->connector->display_info.height_mm = 160;
+       panel->connector->display_info.bpc = 8;
+
+       return 1;
+}
+
+static const struct drm_panel_funcs innolux_panel_funcs = {
+       .disable = innolux_panel_disable,
+       .unprepare = innolux_panel_unprepare,
+       .prepare = innolux_panel_prepare,
+       .enable = innolux_panel_enable,
+       .get_modes = innolux_panel_get_modes,
+};
+
+static const struct of_device_id innolux_of_match[] = {
+       { .compatible = "innolux,p079zca", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, innolux_of_match);
+
+static int innolux_panel_add(struct innolux_panel *innolux)
+{
+       struct device *dev = &innolux->link->dev;
+       struct device_node *np;
+       int err;
+
+       innolux->supply = devm_regulator_get(dev, "power");
+       if (IS_ERR(innolux->supply))
+               return PTR_ERR(innolux->supply);
+
+       innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+                                                      GPIOD_OUT_HIGH);
+       if (IS_ERR(innolux->enable_gpio)) {
+               err = PTR_ERR(innolux->enable_gpio);
+               dev_dbg(dev, "failed to get enable gpio: %d\n", err);
+               innolux->enable_gpio = NULL;
+       }
+
+       np = of_parse_phandle(dev->of_node, "backlight", 0);
+       if (np) {
+               innolux->backlight = of_find_backlight_by_node(np);
+               of_node_put(np);
+
+               if (!innolux->backlight)
+                       return -EPROBE_DEFER;
+       }
+
+       drm_panel_init(&innolux->base);
+       innolux->base.funcs = &innolux_panel_funcs;
+       innolux->base.dev = &innolux->link->dev;
+
+       err = drm_panel_add(&innolux->base);
+       if (err < 0)
+               goto put_backlight;
+
+       return 0;
+
+put_backlight:
+       put_device(&innolux->backlight->dev);
+
+       return err;
+}
+
+static void innolux_panel_del(struct innolux_panel *innolux)
+{
+       if (innolux->base.dev)
+               drm_panel_remove(&innolux->base);
+
+       put_device(&innolux->backlight->dev);
+}
+
+static int innolux_panel_probe(struct mipi_dsi_device *dsi)
+{
+       struct innolux_panel *innolux;
+       int err;
+
+       dsi->lanes = 4;
+       dsi->format = MIPI_DSI_FMT_RGB888;
+       dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+                         MIPI_DSI_MODE_LPM;
+
+       innolux = devm_kzalloc(&dsi->dev, sizeof(*innolux), GFP_KERNEL);
+       if (!innolux)
+               return -ENOMEM;
+
+       mipi_dsi_set_drvdata(dsi, innolux);
+
+       innolux->link = dsi;
+
+       err = innolux_panel_add(innolux);
+       if (err < 0)
+               return err;
+
+       err = mipi_dsi_attach(dsi);
+       return err;
+}
+
+static int innolux_panel_remove(struct mipi_dsi_device *dsi)
+{
+       struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
+       int err;
+
+       err = innolux_panel_unprepare(&innolux->base);
+       if (err < 0)
+               DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n",
+                             err);
+
+       err = innolux_panel_disable(&innolux->base);
+       if (err < 0)
+               DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err);
+
+       err = mipi_dsi_detach(dsi);
+       if (err < 0)
+               DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n",
+                             err);
+
+       drm_panel_detach(&innolux->base);
+       innolux_panel_del(innolux);
+
+       return 0;
+}
+
+static void innolux_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+       struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
+
+       innolux_panel_unprepare(&innolux->base);
+       innolux_panel_disable(&innolux->base);
+}
+
+static struct mipi_dsi_driver innolux_panel_driver = {
+       .driver = {
+               .name = "panel-innolux-p079zca",
+               .of_match_table = innolux_of_match,
+       },
+       .probe = innolux_panel_probe,
+       .remove = innolux_panel_remove,
+       .shutdown = innolux_panel_shutdown,
+};
+module_mipi_dsi_driver(innolux_panel_driver);
+
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_DESCRIPTION("Innolux P079ZCA panel driver");
+MODULE_LICENSE("GPL v2");