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.
Signed-off-by: Yakir Yang <ykk@xxxxxxxxxxxxxx>
---
Changes in v3:
- Add edid modes parse support
Changes in v2: None
drivers/gpu/drm/bridge/analogix_dp_core.c | 17 +++++++-----
drivers/gpu/drm/bridge/analogix_dp_core.h | 45 ++++++++++++++++---------------
2 files changed, 33 insertions(+), 29 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix_dp_core.c
index 052b9b3..83698c6 100644
--- a/drivers/gpu/drm/bridge/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix_dp_core.c
@@ -111,7 +111,7 @@ 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;
@@ -915,12 +915,6 @@ 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) {
@@ -976,8 +970,17 @@ static int analogix_dp_get_modes(struct drm_connector *connector)
{
struct analogix_dp_device *dp = connector_to_dp(connector);
struct analogix_dp_plat_data *plat_data = dp->plat_data;
+ struct edid *edid = (struct edid *)dp->edid;
int num_modes = 0;
+ if (analogix_dp_handle_edid(dp)) {
+ dev_err(dp->dev, "unable to handle edid\n");
+ return -EINVAL;
+ }
+
+ drm_mode_connector_update_edid_property(connector, edid);
+ num_modes += drm_add_edid_modes(connector, edid);
+
if (plat_data && plat_data->panel)
num_modes += drm_panel_get_modes(plat_data->panel);
diff --git a/drivers/gpu/drm/bridge/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix_dp_core.h
index 2405155..950b6ca 100644
--- a/drivers/gpu/drm/bridge/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/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_rate_type {
LINK_RATE_1_62GBPS = DP_LINK_BW_1_62,
LINK_RATE_2_70GBPS = DP_LINK_BW_2_7,
@@ -161,6 +183,7 @@ struct analogix_dp_device {
int dpms_mode;
int hpd_gpio;
bool need_force_hpd;
+ unsigned char edid[EDID_BLOCK_LENGTH * 2];
struct analogix_dp_plat_data *plat_data;
};
@@ -260,26 +283,4 @@ 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 */
--
1.9.1
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