drm/amd/display: only blank dp stream which will be powered off

[why]
blank all dp stream would impact edp

[how]
only blank the one which will be powered off

Signed-off-by: Xiaodong Yan <Xiaodong.Yan@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 6086bbe..ac133fa 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1238,7 +1238,7 @@ void dcn10_init_pipes(struct dc *dc, struct dc_state *context)
 
 void dcn10_init_hw(struct dc *dc)
 {
-       int i;
+       int i, j;
        struct abm *abm = dc->res_pool->abm;
        struct dmcu *dmcu = dc->res_pool->dmcu;
        struct dce_hwseq *hws = dc->hwseq;
@@ -1328,14 +1328,6 @@ 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;
@@ -1350,8 +1342,21 @@ void dcn10_init_hw(struct dc *dc)
                                /* if any of the displays are lit up turn them off */
                                status = core_link_read_dpcd(dc->links[i], DP_SET_POWER,
                                                                &dpcd_power_state, sizeof(dpcd_power_state));
-                               if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0)
+                               if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0) {
+                                       /* blank dp stream before power off receiver*/
+                                       if (dc->links[i]->link_enc->funcs->get_dig_frontend) {
+                                               unsigned int fe = dc->links[i]->link_enc->funcs->get_dig_frontend(dc->links[i]->link_enc);
+
+                                               for (j = 0; j < dc->res_pool->stream_enc_count; j++) {
+                                                       if (fe == dc->res_pool->stream_enc[j]->id) {
+                                                               dc->res_pool->stream_enc[j]->funcs->dp_blank(
+                                                                                       dc->res_pool->stream_enc[j]);
+                                                               break;
+                                                       }
+                                               }
+                                       }
                                        dp_receiver_power_ctrl(dc->links[i], false);
+                               }
                        }
                }
        }