FROMLIST: drm: bridge: analogix/dp: add edid modes parse in get_modes method

Display Port monitor could support kinds of mode which indicate
in monitor edid, not just one single display resolution which
defined in panel or devivetree property display timing.

Note: Gustavo Padovan try to remove the controller and phy
power on function in bind time at bellow commit:
	drm/exynos: do not start enabling DP at bind() phase

But for now driver need to read edid message in .get_modes()
function, so controller must be inited in bind time, so we
need to add controller init back.

(am from https://patchwork.kernel.org/patch/8312921/)

Change-Id: I32abee21665a7e1470f2898b7fbc925108f9d768
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index cfdf69518ec7c819d638461c4a4f8124b7434678..bc59e8d997b306985a7f7ff10b25badfa4a98749 100644 (file)
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -110,7 +110,7 @@ static unsigned char analogix_dp_calc_edid_check_sum(unsigned char *edid_data)
 
 static int analogix_dp_read_edid(struct analogix_dp_device *dp)
 {
-       unsigned char edid[EDID_BLOCK_LENGTH * 2];
+       unsigned char *edid = dp->edid;
        unsigned int extend_block = 0;
        unsigned char sum;
        unsigned char test_vector;
@@ -904,12 +904,6 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
                        DRM_ERROR("failed to disable the panel\n");
        }
 
-       ret = analogix_dp_handle_edid(dp);
-       if (ret) {
-               dev_err(dp->dev, "unable to handle edid\n");
-               return;
-       }
-
        ret = analogix_dp_set_link_train(dp, dp->video_info.max_lane_count,
                                         dp->video_info.max_link_rate);
        if (ret) {
@@ -939,8 +933,14 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
 int analogix_dp_get_modes(struct drm_connector *connector)
 {
        struct analogix_dp_device *dp = to_dp(connector);
+       struct edid *edid = (struct edid *)dp->edid;
        int num_modes = 0;
 
+       if (analogix_dp_handle_edid(dp) == 0) {
+               drm_mode_connector_update_edid_property(&dp->connector, edid);
+               num_modes += drm_add_edid_modes(&dp->connector, edid);
+       }
+
        if (dp->plat_data->panel)
                num_modes += drm_panel_get_modes(dp->plat_data->panel);
 
@@ -978,6 +978,7 @@ static void analogix_dp_connector_destroy(struct drm_connector *connector)
 {
        drm_connector_unregister(connector);
        drm_connector_cleanup(connector);
+
 }
 
 static const struct drm_connector_funcs analogix_dp_connector_funcs = {
@@ -1348,6 +1349,8 @@ int analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
                }
        }
 
+       analogix_dp_init_dp(dp);
+
        ret = devm_request_irq(&pdev->dev, dp->irq, analogix_dp_irq_handler,
                               irq_flags, "analogix-dp", dp);
        if (ret) {

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
index 22aff07c199577d5a6a145b4e80ef72c8ee1765b..48b4a8723d42a50ae0519dc1d4906d8e36061478 100644 (file)
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -20,6 +20,28 @@
 #define MAX_CR_LOOP 5
 #define MAX_EQ_LOOP 5
 
+/* I2C EDID Chip ID, Slave Address */
+#define I2C_EDID_DEVICE_ADDR                   0x50
+#define I2C_E_EDID_DEVICE_ADDR                 0x30
+
+#define EDID_BLOCK_LENGTH                      0x80
+#define EDID_HEADER_PATTERN                    0x00
+#define EDID_EXTENSION_FLAG                    0x7e
+#define EDID_CHECKSUM                          0x7f
+
+/* DP_MAX_LANE_COUNT */
+#define DPCD_ENHANCED_FRAME_CAP(x)             (((x) >> 7) & 0x1)
+#define DPCD_MAX_LANE_COUNT(x)                 ((x) & 0x1f)
+
+/* DP_LANE_COUNT_SET */
+#define DPCD_LANE_COUNT_SET(x)                 ((x) & 0x1f)
+
+/* DP_TRAINING_LANE0_SET */
+#define DPCD_PRE_EMPHASIS_SET(x)               (((x) & 0x3) << 3)
+#define DPCD_PRE_EMPHASIS_GET(x)               (((x) >> 3) & 0x3)
+#define DPCD_VOLTAGE_SWING_SET(x)              (((x) & 0x3) << 0)
+#define DPCD_VOLTAGE_SWING_GET(x)              (((x) >> 0) & 0x3)
+
 enum link_lane_count_type {
        LANE_COUNT1 = 1,
        LANE_COUNT2 = 2,
@@ -155,6 +177,7 @@ struct analogix_dp_device {
        int                     dpms_mode;
        int                     hpd_gpio;
        bool                    force_hpd;
+       unsigned char           edid[EDID_BLOCK_LENGTH * 2];
 
        struct analogix_dp_plat_data *plat_data;
 };
@@ -254,27 +277,4 @@ int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp);
 void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp);
 void analogix_dp_enable_scrambling(struct analogix_dp_device *dp);
 void analogix_dp_disable_scrambling(struct analogix_dp_device *dp);
-
-/* I2C EDID Chip ID, Slave Address */
-#define I2C_EDID_DEVICE_ADDR                   0x50
-#define I2C_E_EDID_DEVICE_ADDR                 0x30
-
-#define EDID_BLOCK_LENGTH                      0x80
-#define EDID_HEADER_PATTERN                    0x00
-#define EDID_EXTENSION_FLAG                    0x7e
-#define EDID_CHECKSUM                          0x7f
-
-/* DP_MAX_LANE_COUNT */
-#define DPCD_ENHANCED_FRAME_CAP(x)             (((x) >> 7) & 0x1)
-#define DPCD_MAX_LANE_COUNT(x)                 ((x) & 0x1f)
-
-/* DP_LANE_COUNT_SET */
-#define DPCD_LANE_COUNT_SET(x)                 ((x) & 0x1f)
-
-/* DP_TRAINING_LANE0_SET */
-#define DPCD_PRE_EMPHASIS_SET(x)               (((x) & 0x3) << 3)
-#define DPCD_PRE_EMPHASIS_GET(x)               (((x) >> 3) & 0x3)
-#define DPCD_VOLTAGE_SWING_SET(x)              (((x) & 0x3) << 0)
-#define DPCD_VOLTAGE_SWING_GET(x)              (((x) >> 0) & 0x3)
-
 #endif /* _ANALOGIX_DP_CORE_H */