drm/amd/display: disable eDP backlight for extend monitor only reboot use case.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 7938c17468415acacf55cb7835bf378431496f29..36b761a3bfc6f605a2cef31346279cd602569d4c 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -649,7 +649,31 @@ bool dc_enable_stereo(
        return ret;
 }
 
+static void disable_eDP_not_in_use(struct dc *dc, struct dc_state *context)
+{
+       int i;
+       struct dc_link *link = NULL;
 
+       /* check if eDP panel is suppose to be set mode, if yes, no need to disable */
+       for (i = 0; i < context->stream_count; i++) {
+               if (context->streams[i]->signal == SIGNAL_TYPE_EDP)
+                       return;
+       }
+
+       /* check if there is an eDP panel not in use */
+       for (i = 0; i < dc->link_count; i++) {
+               if (dc->links[i]->local_sink &&
+                       dc->links[i]->local_sink->sink_signal == SIGNAL_TYPE_EDP) {
+                       link = dc->links[i];
+                       break;
+               }
+       }
+
+       if (link) {
+               dc->hwss.edp_backlight_control(link, false);
+               dc->hwss.edp_power_control(link, false);
+       }
+}
 /*
  * Applies given context to HW and copy it into current context.
  * It's up to the user to release the src context afterwards.
@@ -667,8 +691,10 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
        for (i = 0; i < context->stream_count; i++)
                dc_streams[i] =  context->streams[i];
 
-       if (!dcb->funcs->is_accelerated_mode(dcb))
+       if (!dcb->funcs->is_accelerated_mode(dcb)) {
                dc->hwss.enable_accelerated_mode(dc);
+               disable_eDP_not_in_use(dc, context);
+       }
 
        /* re-program planes for existing stream, in case we need to
         * free up plane resource for later use