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drm/amd/display: wait for vblank during pipe programming

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[WHY]
Skipping vblank during global sync update request can result in
underflow on certain displays.

[HOW]
Roll back to the previous behavior where DC waits for vblank during pipe
programming.

Fixes: 5d3e144214 ("drm/amd/display: do not wait for vblank during pipe programming")
Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Haiyi Zhou <Haiyi.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Haiyi Zhou 2022-10-20 11:46:54 -04:00 • committed by Alex Deucher
parent 6bf20b9ba7
commit 203ccaf586
1 changed files with 2 additions and 4 deletions
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6
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
View file

@ -1640,10 +1640,8 @@ static void dcn20_program_pipe(
pipe_ctx->pipe_dlg_param.vupdate_width);
if (pipe_ctx->stream->mall_stream_config.type != SUBVP_PHANTOM) {
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);
}
pipe_ctx->stream_res.tg->funcs->set_vtg_params(