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drm/amd/display: Force delay after DP receive power up 

[Why]
Some sprcified monitor scalar cannot recognize timing
change on demand. Once the link phy disable and enable
during a short period then the Sink protection mechanism
could keep the screen in blank and cannot be recoverred.

[How]
To add 100ms delay between enable link phy and link training.

Signed-off-by: Martin Tsai <martin.tsai@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Martin Tsai 2020-05-22 15:50:11 +08:00 committed by Alex Deucher
parent c69553ebdf
commit 013cce49f7
2 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@ -1559,9 +1559,10 @@ bool perform_link_training_with_retries(
pipe_ctx->clock_source->id,
link_setting);
if (stream->sink_patches.dppowerup_delay > 0) {
int delay_dp_power_up_in_ms = stream->sink_patches.dppowerup_delay;
if ((link && link->dc->debug.dppowerup_delay > 0) || stream->sink_patches.dppowerup_delay > 0) {
int delay_dp_power_up_in_ms =
(link->dc->debug.dppowerup_delay >= stream->sink_patches.dppowerup_delay) ?
link->dc->debug.dppowerup_delay : stream->sink_patches.dppowerup_delay;
msleep(delay_dp_power_up_in_ms);
}

1
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -498,6 +498,7 @@ struct dc_debug_options {
bool usbc_combo_phy_reset_wa;
bool disable_dsc;
bool enable_dram_clock_change_one_display_vactive;
unsigned int dppowerup_delay;
};
struct dc_debug_data {