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drm/amd/display: Skip unnecessary abm disable

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[Why]
We try to disable abm immediately when it's being gradually
disabled, which causes backlight ramping being paused in the
middle

[How]
Don't disable abm immediately if abm has been or is being
disabled through set_abm_level path

Reviewed-by: Anthony Koo <anthony.koo@amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo@amd.com>
Signed-off-by: Sherry Wang <yao.wang1@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sherry Wang
2024-06-06 16:51:43 +08:00
committed by Alex Deucher
parent bbd0d1c942
commit 3269d6fb75
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c
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@@ -183,6 +183,12 @@ void dcn21_set_abm_immediate_disable(struct pipe_ctx *pipe_ctx)
struct panel_cntl *panel_cntl = pipe_ctx->stream->link->panel_cntl;
struct dmcu *dmcu = pipe_ctx->stream->ctx->dc->res_pool->dmcu;
// make a short term w/a for an issue that backlight ramping unexpectedly paused in the middle,
// will decouple backlight from ABM and redefine DMUB interface, then this w/a could be removed
if (pipe_ctx->stream->abm_level == 0 || pipe_ctx->stream->abm_level == ABM_LEVEL_IMMEDIATE_DISABLE) {
return;
}
if (dmcu) {
dce110_set_abm_immediate_disable(pipe_ctx);
return;