Commit ffa2151a authored May 27, 2020 by Yongqiang Sun Committed by Alex Deucher Jul 01, 2020

drm/amd/display: not reset dmub in driver.



[Why]
during S0i3, set power state is toggled a few times,
and dmub uC will restart with current reset/hw_init.

[How]
Remove reset in set power state, and before doing hw_init,
check if dmub is enabled, and doing FW autoload check only
if dmub is already enabled.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent a0a85ac4

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -275,7 +275,11 @@ void dmub_dcn20_set_inbox1_wptr(struct dmub_srv *dmub, uint32_t wptr_offset)

		bool dmub_dcn20_is_hw_init(struct dmub_srv *dmub)
		{
		return REG_READ(DMCUB_REGION3_CW2_BASE_ADDRESS) != 0;
		uint32_t is_hw_init;

		REG_GET(DMCUB_CNTL, DMCUB_ENABLE, &is_hw_init);

		return is_hw_init != 0;
		}

		bool dmub_dcn20_is_supported(struct dmub_srv *dmub)

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