From c1a54243f8f02f14888d8a0748c55158f167e347 Mon Sep 17 00:00:00 2001
From: Josip Pavic <Josip.Pavic@amd.com>
Date: Fri, 29 Apr 2022 14:03:22 -0400
Subject: drm/amd/display: do not wait for vblank during pipe programming
Git-commit: 5d3e144214105497f6db47f12c94d25df6ba5e52
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
[Why]
Waiting for the vlbank every time a global sync update is requested,
including during full update flips, results in a stutter.
[How]
Do not wait for vblank during pipe programming.
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Josip Pavic <Josip.Pavic@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index b627c41713cc..e1f87bd72e4a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1593,7 +1593,6 @@ static void dcn20_program_pipe(
pipe_ctx->pipe_dlg_param.vupdate_offset,
pipe_ctx->pipe_dlg_param.vupdate_width);
- 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(
--
2.38.1