From 6fd3d8bf89fc6525264552910accb09c93abba02 Mon Sep 17 00:00:00 2001 From: Ashutosh Dixit Date: Thu, 16 Feb 2023 08:49:44 -0800 Subject: [PATCH] drm/i915/hwmon: Enable PL1 limit when writing limit value to HW Previous documentation suggested that the PL1 power limit is always enabled in HW. However we now find this not to be the case on some platforms (such as ATSM). Therefore enable the PL1 power limit (by setting the enable bit) when writing the PL1 limit value to HW. Bspec: 51864 Signed-off-by: Ashutosh Dixit Reviewed-by: Rodrigo Vivi Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20230216164944.2366150-3-ashutosh.dixit@intel.com --- drivers/gpu/drm/i915/i915_hwmon.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 85195d61f89c7..7c20a6f47b92e 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -385,10 +385,11 @@ hwm_power_max_write(struct hwm_drvdata *ddat, long val) /* Computation in 64-bits to avoid overflow. Round to nearest. */ nval = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_power, SF_POWER); + nval = PKG_PWR_LIM_1_EN | REG_FIELD_PREP(PKG_PWR_LIM_1, nval); hwm_locked_with_pm_intel_uncore_rmw(ddat, hwmon->rg.pkg_rapl_limit, - PKG_PWR_LIM_1, - REG_FIELD_PREP(PKG_PWR_LIM_1, nval)); + PKG_PWR_LIM_1_EN | PKG_PWR_LIM_1, + nval); return 0; } -- 2.30.2