This is a note to let you know that I've just added the patch titled
drm/i915/hwmon: Enable PL1 power limit
to the 6.2-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-i915-hwmon-enable-pl1-power-limit.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 45abf2df92eab433d48738c4d71356c8a9e73d52
Author: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
Date: Fri Feb 3 07:53:09 2023 -0800
drm/i915/hwmon: Enable PL1 power limit
[ Upstream commit 0349c41b05968befaffa5fbb7e73d0ee6004f610 ]
Previous documentation suggested that PL1 power limit is always
enabled. However we now find this not to be the case on some
platforms (such as ATSM). Therefore enable PL1 power limit during hwmon
initialization.
Bspec: 51864
v2: Add Bspec reference (Gwan-gyeong)
v3: Add Fixes tag
Fixes: 99f55efb79114 ("drm/i915/hwmon: Power PL1 limit and TDP setting")
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230203155309.1042297-1-ashutosh.dixit@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c
index c588a17f97e98..6ef7af7c17460 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -656,6 +656,11 @@ hwm_get_preregistration_info(struct drm_i915_private *i915)
for_each_gt(gt, i915, i)
hwm_energy(&hwmon->ddat_gt[i], &energy);
}
+
+ /* Enable PL1 power limit */
+ if (i915_mmio_reg_valid(hwmon->rg.pkg_rapl_limit))
+ hwm_locked_with_pm_intel_uncore_rmw(ddat, hwmon->rg.pkg_rapl_limit,
+ PKG_PWR_LIM_1_EN, PKG_PWR_LIM_1_EN);
}
void i915_hwmon_register(struct drm_i915_private *i915)
