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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>
This commit is contained in:
Yongqiang Sun 2020-05-27 13:57:55 -04:00 committed by Alex Deucher
parent a0a85ac4ea
commit ffa2151a8f
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c
View File

@ -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)