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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>
This commit is contained in:
David Francis 2018-10-25 15:47:43 -04:00 committed by Alex Deucher
parent d9672a5bfb
commit 6ccda15773
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@ -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
*/