diff options
| author | Austin Zheng | 2023-07-26 10:40:48 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-09-23 11:11:04 +0200 |
| commit | 506d2ee72af2ffc4173537eb001d7d4d57781ec7 (patch) | |
| tree | bd433061a0060263e5ba0c50a9700ee4ec9905f6 | |
| parent | 2d027da82a96153eaa22570e549e5d43cbfd84fc (diff) | |
drm/amd/display: Use DTBCLK as refclk instead of DPREFCLK
[ Upstream commit 4a30cc2bd281fa176a68b5305cd3695d636152ad ]
[Why]
Flash of corruption observed when UCLK switching after transitioning
from DTBCLK to DPREFCLK on subVP(DP) + subVP(HDMI) config
Scenario where DPREFCLK is required instead of DTBCLK is not expected
[How]
Always set the DTBCLK source as DTBCLK0
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Austin Zheng <austin.zheng@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>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c index ffbb739d85b6..8496ff4a25e3 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c @@ -290,7 +290,8 @@ static void dccg32_set_dpstreamclk( struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); /* set the dtbclk_p source */ - dccg32_set_dtbclk_p_src(dccg, src, otg_inst); + /* always program refclk as DTBCLK. No use-case expected to require DPREFCLK as refclk */ + dccg32_set_dtbclk_p_src(dccg, DTBCLK0, otg_inst); /* enabled to select one of the DTBCLKs for pipe */ switch (dp_hpo_inst) { |