diff options
Diffstat (limited to '0041-drm-amd-display-clear-optc-underflow-before-turn-off.patch')
| -rw-r--r-- | 0041-drm-amd-display-clear-optc-underflow-before-turn-off.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/0041-drm-amd-display-clear-optc-underflow-before-turn-off.patch b/0041-drm-amd-display-clear-optc-underflow-before-turn-off.patch new file mode 100644 index 000000000000..1eb0e65821bb --- /dev/null +++ b/0041-drm-amd-display-clear-optc-underflow-before-turn-off.patch @@ -0,0 +1,44 @@ +From 3101839b080137c367f3f88c2a040f791de880aa Mon Sep 17 00:00:00 2001 +From: Fudong Wang <Fudong.Wang@amd.com> +Date: Wed, 27 Jul 2022 12:01:29 +0800 +Subject: [PATCH 41/73] drm/amd/display: clear optc underflow before turn off + odm clock + +[ Upstream commit b2a93490201300a749ad261b5c5d05cb50179c44 ] + +[Why] +After ODM clock off, optc underflow bit will be kept there always and clear not work. +We need to clear that before clock off. + +[How] +Clear that if have when clock off. + +Reviewed-by: Alvin Lee <alvin.lee2@amd.com> +Acked-by: Tom Chung <chiahsuan.chung@amd.com> +Signed-off-by: Fudong Wang <Fudong.Wang@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> +--- + drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c +index b1671b00ce40..2349977b0abb 100644 +--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c ++++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c +@@ -464,6 +464,11 @@ void optc1_enable_optc_clock(struct timing_generator *optc, bool enable) + OTG_CLOCK_ON, 1, + 1, 1000); + } else { ++ ++ //last chance to clear underflow, otherwise, it will always there due to clock is off. ++ if (optc->funcs->is_optc_underflow_occurred(optc) == true) ++ optc->funcs->clear_optc_underflow(optc); ++ + REG_UPDATE_2(OTG_CLOCK_CONTROL, + OTG_CLOCK_GATE_DIS, 0, + OTG_CLOCK_EN, 0); +-- +2.37.3 + |