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From 4628395c0e38641015d90c146f59180bc4c7e886 Mon Sep 17 00:00:00 2001
From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Mon, 18 Dec 2017 16:59:44 -0500
Subject: [PATCH 3101/4131] 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>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index a744dee..9427eaf 100644
--- 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
--
2.7.4
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