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drm/amd/display: Fix noise issue on HDMI AV mute

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[ 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@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Leo Ma <hanghong.ma@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Leo Ma 2023-07-28 08:35:07 -04:00 committed by Greg Kroah-Hartman
parent 1a77ee0f06
commit b074a76cbd
1 changed files with 11 additions and 1 deletions
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12
drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c
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@ -641,10 +641,20 @@ void dcn30_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
if (pipe_ctx == NULL)
return;
if (dc_is_hdmi_tmds_signal(pipe_ctx->stream->signal) && pipe_ctx->stream_res.stream_enc != NULL)
if (dc_is_hdmi_tmds_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)