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drm/amd/powerplay: Enable/Disable NBPSTATE on On/OFF of UVD 

We observe black lines (underflow) on display when playing a
4K video with UVD. On Disabling Low memory P state this issue is
not seen.
Multiple runs of power measurement shows no imapct.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Signed-off-by: Satyajit Sahu <satyajit.sahu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Akshu Agrawal 2018-09-24 15:48:02 +05:30 committed by Alex Deucher
parent 479afffe21
commit 51ef434a15
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/amd/powerplay/hwmgr/smu8_hwmgr.c
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@ -1228,14 +1228,17 @@ static int smu8_dpm_force_dpm_level(struct pp_hwmgr *hwmgr,
static int smu8_dpm_powerdown_uvd(struct pp_hwmgr *hwmgr)
{
if (PP_CAP(PHM_PlatformCaps_UVDPowerGating))
if (PP_CAP(PHM_PlatformCaps_UVDPowerGating)) {
smu8_nbdpm_pstate_enable_disable(hwmgr, true, true);
return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_UVDPowerOFF);
}
return 0;
}
static int smu8_dpm_powerup_uvd(struct pp_hwmgr *hwmgr)
{
if (PP_CAP(PHM_PlatformCaps_UVDPowerGating)) {
smu8_nbdpm_pstate_enable_disable(hwmgr, false, true);
return smum_send_msg_to_smc_with_parameter(
hwmgr,
PPSMC_MSG_UVDPowerON,