Commit 20172ff3 authored by Victor Lu's avatar Victor Lu Committed by Alex Deucher
Browse files

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: default avatarVictor Lu <victorchengchi.lu@amd.com>
Reviewed-by: default avatarRoman Li <Roman.Li@amd.com>
Acked-by: default avatarQingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 86b6037f

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c

+3 −3
Original line number Diff line number Diff line
@@ -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 */

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