From: Wenjing Liu <wenjing....@amd.com>
[why]
According to specs, it expects us to write all 4 bytes even if
current lane count is less than 4.
Reviewed-by: George Shen <george.s...@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahf...@amd.com>
Signed-off-by: Wenjing Liu <wenjing....@amd.com>
---
.../gpu/drm/amd/display/dc/core/dc_link_dp.c | 37 +++++++++----------
1 file changed, 18 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 4ea8acb16161..c4acadba78d6 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -944,6 +944,23 @@ enum dc_status dp_get_lane_status_and_lane_adjust(
return status;
}
+static enum dc_status dpcd_128b_132b_set_lane_settings(
+ struct dc_link *link,
+ const struct link_training_settings *link_training_setting)
+{
+ enum dc_status status = core_link_write_dpcd(link,
+ DP_TRAINING_LANE0_SET,
+ (uint8_t *)(link_training_setting->dpcd_lane_settings),
+ sizeof(link_training_setting->dpcd_lane_settings));
+
+ DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X TX_FFE_PRESET_VALUE = %x\n",
+ __func__,
+ DP_TRAINING_LANE0_SET,
+
link_training_setting->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE);
+ return status;
+}
+
+
enum dc_status dpcd_set_lane_settings(
struct dc_link *link,
const struct link_training_settings *link_training_setting,
@@ -964,16 +981,6 @@ enum dc_status dpcd_set_lane_settings(
link_training_setting->link_settings.lane_count);
if (is_repeater(link_training_setting, offset)) {
- if
(dp_get_link_encoding_format(&link_training_setting->link_settings) ==
- DP_128b_132b_ENCODING)
- DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n"
- " 0x%X TX_FFE_PRESET_VALUE = %x\n",
- __func__,
- offset,
- lane0_set_address,
-
link_training_setting->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE);
- else if
(dp_get_link_encoding_format(&link_training_setting->link_settings) ==
- DP_8b_10b_ENCODING)
DC_LOG_HW_LINK_TRAINING("%s\n LTTPR Repeater ID: %d\n"
" 0x%X VS set = %x PE set = %x max VS Reached
= %x max PE Reached = %x\n",
__func__,
@@ -985,14 +992,6 @@ enum dc_status dpcd_set_lane_settings(
link_training_setting->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED);
} else {
- if
(dp_get_link_encoding_format(&link_training_setting->link_settings) ==
- DP_128b_132b_ENCODING)
- DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X TX_FFE_PRESET_VALUE
= %x\n",
- __func__,
- lane0_set_address,
-
link_training_setting->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE);
- else if
(dp_get_link_encoding_format(&link_training_setting->link_settings) ==
- DP_8b_10b_ENCODING)
DC_LOG_HW_LINK_TRAINING("%s\n 0x%X VS set = %x PE set = %x max
VS Reached = %x max PE Reached = %x\n",
__func__,
lane0_set_address,
@@ -2023,7 +2022,7 @@ static enum link_training_result
dp_perform_128b_132b_channel_eq_done_sequence(
result = DP_128b_132b_LT_FAILED;
} else {
dp_set_hw_lane_settings(link, link_res, lt_settings,
DPRX);
- dpcd_set_lane_settings(link, lt_settings, DPRX);
+ dpcd_128b_132b_set_lane_settings(link, lt_settings);
}
loop_count++;
}
--
2.37.2
