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drm/amd/display: blank dp stream before power off receiver

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[why]
power off dp receiver directly cause garbage during hw init

[how]
blank dp stream and then power off receiver

Signed-off-by: Xiaodong Yan <Xiaodong.Yan@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Xiaodong Yan 2020-04-05 16:40:46 -04:00 committed by Alex Deucher
parent b3a941df69
commit c5f5b9d934
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
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@ -1328,6 +1328,14 @@ void dcn10_init_hw(struct dc *dc)
uint8_t dpcd_power_state = '\0';
enum dc_status status = DC_ERROR_UNEXPECTED;
/* blank all dp streams before power off receiver,
* this should only impact DP
*/
for (i = 0; i < dc->res_pool->stream_enc_count; i++) {
dc->res_pool->stream_enc[i]->funcs->dp_blank(
dc->res_pool->stream_enc[i]);
}
for (i = 0; i < dc->link_count; i++) {
if (dc->links[i]->connector_signal != SIGNAL_TYPE_DISPLAY_PORT)
continue;