drm: Import driver for the sil164 I2C TMDS transmitter.
authorFrancisco Jerez <currojerez@riseup.net>
Thu, 22 Jul 2010 15:06:18 +0000 (17:06 +0200)
committerDave Airlie <airlied@redhat.com>
Mon, 2 Aug 2010 00:21:13 +0000 (10:21 +1000)
sil164 transmitters are used for DVI outputs on Intel/nvidia and ATI setups.

So far only nouveau can use this driver.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Tested-by: Patrice Mandin <patmandin@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/i2c/Makefile
drivers/gpu/drm/i2c/sil164_drv.c [new file with mode: 0644]
drivers/gpu/drm/nouveau/Kconfig
include/drm/i2c/sil164.h [new file with mode: 0644]

index 6d2abaf35ba22641a3a8e2d6677ff64fb5571b6e..92862563e7ee3dd8fbafb46d7d319b9dfb432514 100644 (file)
@@ -2,3 +2,6 @@ ccflags-y := -Iinclude/drm
 
 ch7006-y := ch7006_drv.o ch7006_mode.o
 obj-$(CONFIG_DRM_I2C_CH7006) += ch7006.o
+
+sil164-y := sil164_drv.o
+obj-$(CONFIG_DRM_I2C_SIL164) += sil164.o
diff --git a/drivers/gpu/drm/i2c/sil164_drv.c b/drivers/gpu/drm/i2c/sil164_drv.c
new file mode 100644 (file)
index 0000000..0b67732
--- /dev/null
@@ -0,0 +1,462 @@
+/*
+ * Copyright (C) 2010 Francisco Jerez.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "drmP.h"
+#include "drm_crtc_helper.h"
+#include "drm_encoder_slave.h"
+#include "i2c/sil164.h"
+
+struct sil164_priv {
+       struct sil164_encoder_params config;
+       struct i2c_client *duallink_slave;
+
+       uint8_t saved_state[0x10];
+       uint8_t saved_slave_state[0x10];
+};
+
+#define to_sil164_priv(x) \
+       ((struct sil164_priv *)to_encoder_slave(x)->slave_priv)
+
+#define sil164_dbg(client, format, ...) do {                           \
+               if (drm_debug & DRM_UT_KMS)                             \
+                       dev_printk(KERN_DEBUG, &client->dev,            \
+                                  "%s: " format, __func__, ## __VA_ARGS__); \
+       } while (0)
+#define sil164_info(client, format, ...)               \
+       dev_info(&client->dev, format, __VA_ARGS__)
+#define sil164_err(client, format, ...)                        \
+       dev_err(&client->dev, format, __VA_ARGS__)
+
+#define SIL164_I2C_ADDR_MASTER                 0x38
+#define SIL164_I2C_ADDR_SLAVE                  0x39
+
+/* HW register definitions */
+
+#define SIL164_VENDOR_LO                       0x0
+#define SIL164_VENDOR_HI                       0x1
+#define SIL164_DEVICE_LO                       0x2
+#define SIL164_DEVICE_HI                       0x3
+#define SIL164_REVISION                                0x4
+#define SIL164_FREQ_MIN                                0x6
+#define SIL164_FREQ_MAX                                0x7
+#define SIL164_CONTROL0                                0x8
+#  define SIL164_CONTROL0_POWER_ON             0x01
+#  define SIL164_CONTROL0_EDGE_RISING          0x02
+#  define SIL164_CONTROL0_INPUT_24BIT          0x04
+#  define SIL164_CONTROL0_DUAL_EDGE            0x08
+#  define SIL164_CONTROL0_HSYNC_ON             0x10
+#  define SIL164_CONTROL0_VSYNC_ON             0x20
+#define SIL164_DETECT                          0x9
+#  define SIL164_DETECT_INTR_STAT              0x01
+#  define SIL164_DETECT_HOTPLUG_STAT           0x02
+#  define SIL164_DETECT_RECEIVER_STAT          0x04
+#  define SIL164_DETECT_INTR_MODE_RECEIVER     0x00
+#  define SIL164_DETECT_INTR_MODE_HOTPLUG      0x08
+#  define SIL164_DETECT_OUT_MODE_HIGH          0x00
+#  define SIL164_DETECT_OUT_MODE_INTR          0x10
+#  define SIL164_DETECT_OUT_MODE_RECEIVER      0x20
+#  define SIL164_DETECT_OUT_MODE_HOTPLUG       0x30
+#  define SIL164_DETECT_VSWING_STAT            0x80
+#define SIL164_CONTROL1                                0xa
+#  define SIL164_CONTROL1_DESKEW_ENABLE                0x10
+#  define SIL164_CONTROL1_DESKEW_INCR_SHIFT    5
+#define SIL164_GPIO                            0xb
+#define SIL164_CONTROL2                                0xc
+#  define SIL164_CONTROL2_FILTER_ENABLE                0x01
+#  define SIL164_CONTROL2_FILTER_SETTING_SHIFT 1
+#  define SIL164_CONTROL2_DUALLINK_MASTER      0x40
+#  define SIL164_CONTROL2_SYNC_CONT            0x80
+#define SIL164_DUALLINK                                0xd
+#  define SIL164_DUALLINK_ENABLE               0x10
+#  define SIL164_DUALLINK_SKEW_SHIFT           5
+#define SIL164_PLLZONE                         0xe
+#  define SIL164_PLLZONE_STAT                  0x08
+#  define SIL164_PLLZONE_FORCE_ON              0x10
+#  define SIL164_PLLZONE_FORCE_HIGH            0x20
+
+/* HW access functions */
+
+static void
+sil164_write(struct i2c_client *client, uint8_t addr, uint8_t val)
+{
+       uint8_t buf[] = {addr, val};
+       int ret;
+
+       ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
+       if (ret < 0)
+               sil164_err(client, "Error %d writing to subaddress 0x%x\n",
+                          ret, addr);
+}
+
+static uint8_t
+sil164_read(struct i2c_client *client, uint8_t addr)
+{
+       uint8_t val;
+       int ret;
+
+       ret = i2c_master_send(client, &addr, sizeof(addr));
+       if (ret < 0)
+               goto fail;
+
+       ret = i2c_master_recv(client, &val, sizeof(val));
+       if (ret < 0)
+               goto fail;
+
+       return val;
+
+fail:
+       sil164_err(client, "Error %d reading from subaddress 0x%x\n",
+                  ret, addr);
+       return 0;
+}
+
+static void
+sil164_save_state(struct i2c_client *client, uint8_t *state)
+{
+       int i;
+
+       for (i = 0x8; i <= 0xe; i++)
+               state[i] = sil164_read(client, i);
+}
+
+static void
+sil164_restore_state(struct i2c_client *client, uint8_t *state)
+{
+       int i;
+
+       for (i = 0x8; i <= 0xe; i++)
+               sil164_write(client, i, state[i]);
+}
+
+static void
+sil164_set_power_state(struct i2c_client *client, bool on)
+{
+       uint8_t control0 = sil164_read(client, SIL164_CONTROL0);
+
+       if (on)
+               control0 |= SIL164_CONTROL0_POWER_ON;
+       else
+               control0 &= ~SIL164_CONTROL0_POWER_ON;
+
+       sil164_write(client, SIL164_CONTROL0, control0);
+}
+
+static void
+sil164_init_state(struct i2c_client *client,
+                 struct sil164_encoder_params *config,
+                 bool duallink)
+{
+       sil164_write(client, SIL164_CONTROL0,
+                    SIL164_CONTROL0_HSYNC_ON |
+                    SIL164_CONTROL0_VSYNC_ON |
+                    (config->input_edge ? SIL164_CONTROL0_EDGE_RISING : 0) |
+                    (config->input_width ? SIL164_CONTROL0_INPUT_24BIT : 0) |
+                    (config->input_dual ? SIL164_CONTROL0_DUAL_EDGE : 0));
+
+       sil164_write(client, SIL164_DETECT,
+                    SIL164_DETECT_INTR_STAT |
+                    SIL164_DETECT_OUT_MODE_RECEIVER);
+
+       sil164_write(client, SIL164_CONTROL1,
+                    (config->input_skew ? SIL164_CONTROL1_DESKEW_ENABLE : 0) |
+                    (((config->input_skew + 4) & 0x7)
+                     << SIL164_CONTROL1_DESKEW_INCR_SHIFT));
+
+       sil164_write(client, SIL164_CONTROL2,
+                    SIL164_CONTROL2_SYNC_CONT |
+                    (config->pll_filter ? 0 : SIL164_CONTROL2_FILTER_ENABLE) |
+                    (4 << SIL164_CONTROL2_FILTER_SETTING_SHIFT));
+
+       sil164_write(client, SIL164_PLLZONE, 0);
+
+       if (duallink)
+               sil164_write(client, SIL164_DUALLINK,
+                            SIL164_DUALLINK_ENABLE |
+                            (((config->duallink_skew + 4) & 0x7)
+                             << SIL164_DUALLINK_SKEW_SHIFT));
+       else
+               sil164_write(client, SIL164_DUALLINK, 0);
+}
+
+/* DRM encoder functions */
+
+static void
+sil164_encoder_set_config(struct drm_encoder *encoder, void *params)
+{
+       struct sil164_priv *priv = to_sil164_priv(encoder);
+
+       priv->config = *(struct sil164_encoder_params *)params;
+}
+
+static void
+sil164_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+       struct sil164_priv *priv = to_sil164_priv(encoder);
+       bool on = (mode == DRM_MODE_DPMS_ON);
+       bool duallink = (on && encoder->crtc->mode.clock > 165000);
+
+       sil164_set_power_state(drm_i2c_encoder_get_client(encoder), on);
+
+       if (priv->duallink_slave)
+               sil164_set_power_state(priv->duallink_slave, duallink);
+}
+
+static void
+sil164_encoder_save(struct drm_encoder *encoder)
+{
+       struct sil164_priv *priv = to_sil164_priv(encoder);
+
+       sil164_save_state(drm_i2c_encoder_get_client(encoder),
+                         priv->saved_state);
+
+       if (priv->duallink_slave)
+               sil164_save_state(priv->duallink_slave,
+                                 priv->saved_slave_state);
+}
+
+static void
+sil164_encoder_restore(struct drm_encoder *encoder)
+{
+       struct sil164_priv *priv = to_sil164_priv(encoder);
+
+       sil164_restore_state(drm_i2c_encoder_get_client(encoder),
+                            priv->saved_state);
+
+       if (priv->duallink_slave)
+               sil164_restore_state(priv->duallink_slave,
+                                    priv->saved_slave_state);
+}
+
+static bool
+sil164_encoder_mode_fixup(struct drm_encoder *encoder,
+                         struct drm_display_mode *mode,
+                         struct drm_display_mode *adjusted_mode)
+{
+       return true;
+}
+
+static int
+sil164_encoder_mode_valid(struct drm_encoder *encoder,
+                         struct drm_display_mode *mode)
+{
+       struct sil164_priv *priv = to_sil164_priv(encoder);
+
+       if (mode->clock < 32000)
+               return MODE_CLOCK_LOW;
+
+       if (mode->clock > 330000 ||
+           (mode->clock > 165000 && !priv->duallink_slave))
+               return MODE_CLOCK_HIGH;
+
+       return MODE_OK;
+}
+
+static void
+sil164_encoder_mode_set(struct drm_encoder *encoder,
+                       struct drm_display_mode *mode,
+                       struct drm_display_mode *adjusted_mode)
+{
+       struct sil164_priv *priv = to_sil164_priv(encoder);
+       bool duallink = adjusted_mode->clock > 165000;
+
+       sil164_init_state(drm_i2c_encoder_get_client(encoder),
+                         &priv->config, duallink);
+
+       if (priv->duallink_slave)
+               sil164_init_state(priv->duallink_slave,
+                                 &priv->config, duallink);
+
+       sil164_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
+}
+
+static enum drm_connector_status
+sil164_encoder_detect(struct drm_encoder *encoder,
+                     struct drm_connector *connector)
+{
+       struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
+
+       if (sil164_read(client, SIL164_DETECT) & SIL164_DETECT_HOTPLUG_STAT)
+               return connector_status_connected;
+       else
+               return connector_status_disconnected;
+}
+
+static int
+sil164_encoder_get_modes(struct drm_encoder *encoder,
+                        struct drm_connector *connector)
+{
+       return 0;
+}
+
+static int
+sil164_encoder_create_resources(struct drm_encoder *encoder,
+                               struct drm_connector *connector)
+{
+       return 0;
+}
+
+static int
+sil164_encoder_set_property(struct drm_encoder *encoder,
+                           struct drm_connector *connector,
+                           struct drm_property *property,
+                           uint64_t val)
+{
+       return 0;
+}
+
+static void
+sil164_encoder_destroy(struct drm_encoder *encoder)
+{
+       struct sil164_priv *priv = to_sil164_priv(encoder);
+
+       if (priv->duallink_slave)
+               i2c_unregister_device(priv->duallink_slave);
+
+       kfree(priv);
+       drm_i2c_encoder_destroy(encoder);
+}
+
+static struct drm_encoder_slave_funcs sil164_encoder_funcs = {
+       .set_config = sil164_encoder_set_config,
+       .destroy = sil164_encoder_destroy,
+       .dpms = sil164_encoder_dpms,
+       .save = sil164_encoder_save,
+       .restore = sil164_encoder_restore,
+       .mode_fixup = sil164_encoder_mode_fixup,
+       .mode_valid = sil164_encoder_mode_valid,
+       .mode_set = sil164_encoder_mode_set,
+       .detect = sil164_encoder_detect,
+       .get_modes = sil164_encoder_get_modes,
+       .create_resources = sil164_encoder_create_resources,
+       .set_property = sil164_encoder_set_property,
+};
+
+/* I2C driver functions */
+
+static int
+sil164_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+       int vendor = sil164_read(client, SIL164_VENDOR_HI) << 8 |
+               sil164_read(client, SIL164_VENDOR_LO);
+       int device = sil164_read(client, SIL164_DEVICE_HI) << 8 |
+               sil164_read(client, SIL164_DEVICE_LO);
+       int rev = sil164_read(client, SIL164_REVISION);
+
+       if (vendor != 0x1 || device != 0x6) {
+               sil164_dbg(client, "Unknown device %x:%x.%x\n",
+                          vendor, device, rev);
+               return -ENODEV;
+       }
+
+       sil164_info(client, "Detected device %x:%x.%x\n",
+                   vendor, device, rev);
+
+       return 0;
+}
+
+static int
+sil164_remove(struct i2c_client *client)
+{
+       return 0;
+}
+
+static struct i2c_client *
+sil164_detect_slave(struct i2c_client *client)
+{
+       struct i2c_adapter *adap = client->adapter;
+       struct i2c_msg msg = {
+               .addr = SIL164_I2C_ADDR_SLAVE,
+               .len = 0,
+       };
+       const struct i2c_board_info info = {
+               I2C_BOARD_INFO("sil164", SIL164_I2C_ADDR_SLAVE)
+       };
+
+       if (i2c_transfer(adap, &msg, 1) != 1) {
+               sil164_dbg(adap, "No dual-link slave found.");
+               return NULL;
+       }
+
+       return i2c_new_device(adap, &info);
+}
+
+static int
+sil164_encoder_init(struct i2c_client *client,
+                   struct drm_device *dev,
+                   struct drm_encoder_slave *encoder)
+{
+       struct sil164_priv *priv;
+
+       priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+       if (!priv)
+               return -ENOMEM;
+
+       encoder->slave_priv = priv;
+       encoder->slave_funcs = &sil164_encoder_funcs;
+
+       priv->duallink_slave = sil164_detect_slave(client);
+
+       return 0;
+}
+
+static struct i2c_device_id sil164_ids[] = {
+       { "sil164", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, sil164_ids);
+
+static struct drm_i2c_encoder_driver sil164_driver = {
+       .i2c_driver = {
+               .probe = sil164_probe,
+               .remove = sil164_remove,
+               .driver = {
+                       .name = "sil164",
+               },
+               .id_table = sil164_ids,
+       },
+       .encoder_init = sil164_encoder_init,
+};
+
+/* Module initialization */
+
+static int __init
+sil164_init(void)
+{
+       return drm_i2c_encoder_register(THIS_MODULE, &sil164_driver);
+}
+
+static void __exit
+sil164_exit(void)
+{
+       drm_i2c_encoder_unregister(&sil164_driver);
+}
+
+MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>");
+MODULE_DESCRIPTION("Silicon Image sil164 TMDS transmitter driver");
+MODULE_LICENSE("GPL and additional rights");
+
+module_init(sil164_init);
+module_exit(sil164_exit);
index b6f5239c2efb07004d7caa084fbefd62aa1b742c..d2d28048efb23e1759c4368a2dbb2a64ac12675e 100644 (file)
@@ -41,4 +41,13 @@ config DRM_I2C_CH7006
 
          This driver is currently only useful if you're also using
          the nouveau driver.
+
+config DRM_I2C_SIL164
+       tristate "Silicon Image sil164 TMDS transmitter"
+       default m if DRM_NOUVEAU
+       help
+         Support for sil164 and similar single-link (or dual-link
+         when used in pairs) TMDS transmitters, used in some nVidia
+         video cards.
+
 endmenu
diff --git a/include/drm/i2c/sil164.h b/include/drm/i2c/sil164.h
new file mode 100644 (file)
index 0000000..205e273
--- /dev/null
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2010 Francisco Jerez.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __DRM_I2C_SIL164_H__
+#define __DRM_I2C_SIL164_H__
+
+/**
+ * struct sil164_encoder_params
+ *
+ * Describes how the sil164 is connected to the GPU. It should be used
+ * as the @params parameter of its @set_config method.
+ *
+ * See "http://www.siliconimage.com/docs/SiI-DS-0021-E-164.pdf".
+ */
+struct sil164_encoder_params {
+       enum {
+               SIL164_INPUT_EDGE_FALLING = 0,
+               SIL164_INPUT_EDGE_RISING
+       } input_edge;
+
+       enum {
+               SIL164_INPUT_WIDTH_12BIT = 0,
+               SIL164_INPUT_WIDTH_24BIT
+       } input_width;
+
+       enum {
+               SIL164_INPUT_SINGLE_EDGE = 0,
+               SIL164_INPUT_DUAL_EDGE
+       } input_dual;
+
+       enum {
+               SIL164_PLL_FILTER_ON = 0,
+               SIL164_PLL_FILTER_OFF,
+       } pll_filter;
+
+       int input_skew; /** < Allowed range [-4, 3], use 0 for no de-skew. */
+       int duallink_skew; /** < Allowed range [-4, 3]. */
+};
+
+#endif