From: Victor Lu Date: Tue, 24 Nov 2020 15:06:04 +0000 (-0500) Subject: drm/amd/display: Change pstate expected timeout warning to 180us on linux X-Git-Tag: accepted/tizen/unified/20230118.172025~7733^2~22^2~152 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=20172ff3f0b4eddcdd1cf4ca31a7d922e9b4c662;p=platform%2Fkernel%2Flinux-rpi.git drm/amd/display: Change pstate expected timeout warning to 180us on linux [Why] There is a warning that triggers when pstate takes too long. Pstate can take up to ~200us on Linux without hanging but it is currently set to 40us. [How] Change the timeout for the warning to be 180us on Linux. Signed-off-by: Victor Lu Reviewed-by: Roman Li Acked-by: Qingqing Zhuo Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c index 75637c2..6f42d10 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c @@ -124,11 +124,11 @@ bool hubbub1_verify_allow_pstate_change_high( * still not asserted, we are probably stuck and going to hang * * TODO: Figure out why it takes ~100us on linux - * pstate takes around ~100us on linux. Unknown currently as to - * why it takes that long on linux + * pstate takes around ~100us (up to 200us) on linux. Unknown currently + * as to why it takes that long on linux */ const unsigned int pstate_wait_timeout_us = 200; - const unsigned int pstate_wait_expected_timeout_us = 40; + const unsigned int pstate_wait_expected_timeout_us = 180; static unsigned int max_sampled_pstate_wait_us; /* data collection */ static bool forced_pstate_allow; /* help with revert wa */