This is a note to let you know that I've just added the patch titled
drm/amd/powerplay: Enable/Disable NBPSTATE on On/OFF of UVD
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-powerplay-enable-disable-nbpstate-on-on-off-of-uvd.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 51ef434a15b450bfbef1e06cc87ee4e98a224486 Mon Sep 17 00:00:00 2001
From: Akshu Agrawal <akshu.agrawal@xxxxxxx>
Date: Mon, 24 Sep 2018 15:48:02 +0530
Subject: drm/amd/powerplay: Enable/Disable NBPSTATE on On/OFF of UVD
From: Akshu Agrawal <akshu.agrawal@xxxxxxx>
commit 51ef434a15b450bfbef1e06cc87ee4e98a224486 upstream.
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@xxxxxxx>
Signed-off-by: Satyajit Sahu <satyajit.sahu@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/powerplay/hwmgr/smu8_hwmgr.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu8_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu8_hwmgr.c
@@ -1222,14 +1222,17 @@ static int smu8_dpm_force_dpm_level(stru
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,
Patches currently in stable-queue which might be from akshu.agrawal@xxxxxxx are
queue-4.19/drm-amd-powerplay-enable-disable-nbpstate-on-on-off-of-uvd.patch
