From: Xiaodong Yan <Xiaodong.Yan@xxxxxxx>
[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@xxxxxxx>
Reviewed-by: Tony Cheng <Tony.Cheng@xxxxxxx>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index dad95f1a7041..079a33a96f90 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -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;
--
2.26.0
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