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From 1a2c10866e21c0fbb5f94164c9ca05cae324ee0e Mon Sep 17 00:00:00 2001
From: David Francis <David.Francis@amd.com>
Date: Thu, 25 Oct 2018 15:47:43 -0400
Subject: [PATCH 0815/2940] drm/amd/display: Get backlight controller id from
link
[Why]
dc_link_set_backlight_level can be called from a context
where the stream is unknown. In this case, we can still
find which controller is driving this particular backlight
[How]
Compare links for equality instead of streams
Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 7494ed791ef1..83c2f757a5fb 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2173,11 +2173,11 @@ bool dc_link_set_backlight_level(const struct dc_link *link,
backlight_pwm_u16_16, backlight_pwm_u16_16);
if (dc_is_embedded_signal(link->connector_signal)) {
- if (stream != NULL) {
- for (i = 0; i < MAX_PIPES; i++) {
+ for (i = 0; i < MAX_PIPES; i++) {
+ if (core_dc->current_state->res_ctx.pipe_ctx[i].stream) {
if (core_dc->current_state->res_ctx.
- pipe_ctx[i].stream
- == stream)
+ pipe_ctx[i].stream->sink->link
+ == link)
/* DMCU -1 for all controller id values,
* therefore +1 here
*/
--
2.17.1
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