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drm/amd/display: Improvement for handling edp link training fails 

[Why]
The eDP retrain will cause the DPCD 300 to be reset to default.
And cause the brightness can't be set correctly.

[How]
delete the call to edp panel power control in both
enable_link_output/disable_link_output entirely and
only call edp panel control in enable_link_dp and 
disable_link_dp once.

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Jingwen Zhu <Jingwen.Zhu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jingwen Zhu 2023-03-30 16:38:59 +08:00 committed by Alex Deucher
parent 56d8ce9d8c
commit e0cce12251
2 changed files with 16 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
View File

@ -3031,10 +3031,12 @@ void dce110_enable_dp_link_output(
const struct link_hwss *link_hwss = get_link_hwss(link, link_res);
unsigned int i;
/*
* Add the logic to extract BOTH power up and power down sequences
* from enable/disable link output and only call edp panel control
* in enable_link_dp and disable_link_dp once.
*/
if (link->connector_signal == SIGNAL_TYPE_EDP) {
if (!link->dc->config.edp_no_power_sequencing)
link->dc->hwss.edp_power_control(link, true);
link->dc->hwss.edp_wait_for_hpd_ready(link, true);
}
@ -3096,11 +3098,12 @@ void dce110_disable_link_output(struct dc_link *link,
link_hwss->disable_link_output(link, link_res, signal);
link->phy_state.symclk_state = SYMCLK_OFF_TX_OFF;
if (signal == SIGNAL_TYPE_EDP &&
link->dc->hwss.edp_backlight_control)
link->dc->hwss.edp_power_control(link, false);
else if (dmcu != NULL && dmcu->funcs->lock_phy)
/*
* Add the logic to extract BOTH power up and power down sequences
* from enable/disable link output and only call edp panel control
* in enable_link_dp and disable_link_dp once.
*/
if (dmcu != NULL && dmcu->funcs->lock_phy)
dmcu->funcs->unlock_phy(dmcu);
dc->link_srv->dp_trace_source_sequence(link, DPCD_SOURCE_SEQ_AFTER_DISABLE_LINK_PHY);
}

5
drivers/gpu/drm/amd/display/dc/link/link_dpms.c
View File

@ -1927,6 +1927,11 @@ static void disable_link_dp(struct dc_link *link,
dp_disable_link_phy(link, link_res, signal);
if (link->connector_signal == SIGNAL_TYPE_EDP) {
if (!link->dc->config.edp_no_power_sequencing)
link->dc->hwss.edp_power_control(link, false);
}
if (signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
/* set the sink to SST mode after disabling the link */
enable_mst_on_sink(link, false);