This is a note to let you know that I've just added the patch titled
drm/amd/display: Fix noise issue on HDMI AV mute
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-fix-noise-issue-on-hdmi-av-mute.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4919c596bdda383651b9c6dda33c24583ae7e5d8
Author: Leo Ma <hanghong.ma@xxxxxxx>
Date: Fri Jul 28 08:35:07 2023 -0400
drm/amd/display: Fix noise issue on HDMI AV mute
[ Upstream commit 69e3be6893a7e668660b05a966bead82bbddb01d ]
[Why]
When mode switching is triggered there is momentary noise visible on
some HDMI TV or displays.
[How]
Wait for 2 frames to make sure we have enough time to send out AV mute
and sink receives a full frame.
Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Wenjing Liu <wenjing.liu@xxxxxxx>
Acked-by: Wayne Lin <wayne.lin@xxxxxxx>
Signed-off-by: Leo Ma <hanghong.ma@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c
index f834573758113..8d8114ee67f67 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c
@@ -673,10 +673,20 @@ void dcn30_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
if (pipe_ctx == NULL)
return;
- if (dc_is_hdmi_signal(pipe_ctx->stream->signal) && pipe_ctx->stream_res.stream_enc != NULL)
+ if (dc_is_hdmi_signal(pipe_ctx->stream->signal) && pipe_ctx->stream_res.stream_enc != NULL) {
pipe_ctx->stream_res.stream_enc->funcs->set_avmute(
pipe_ctx->stream_res.stream_enc,
enable);
+
+ /* Wait for two frame to make sure AV mute is sent out */
+ if (enable) {
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VBLANK);
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VBLANK);
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
+ }
+ }
}
void dcn30_update_info_frame(struct pipe_ctx *pipe_ctx)
