diff options
| author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-09-09 02:45:33 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-09-19 02:08:38 +0300 |
| commit | 4cc6feb715c223d59c8cad0dc71bce1a574a2c67 (patch) | |
| tree | 7fcc5cb5256804100363f9df9ea19d5370e3f711 | |
| parent | da83ef85f5356b4bdf534add20fb34dcc6b53fc1 (diff) | |
| download | linux-4cc6feb715c223d59c8cad0dc71bce1a574a2c67.tar.xz | |
drm/i915/cnp: Don't touch other PCH clock gating bits.
Don't touch other bits. My bad.
I haven't seen any case where those other bits appeard to be
set before we touch it, but it is safe to avoid touching
other bits we weren't told to touch.
Fixes: 0a46ddd57c9e ("drm/i915/cnp: Wa 1181: Fix Backlight issue")
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170908234534.17986-1-rodrigo.vivi@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 94624ede3479..adfeb7bb8874 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -8369,7 +8369,8 @@ static void cnp_init_clock_gating(struct drm_i915_private *dev_priv) return; /* Wa #1181 */ - I915_WRITE(SOUTH_DSPCLK_GATE_D, CNP_PWM_CGE_GATING_DISABLE); + I915_WRITE(SOUTH_DSPCLK_GATE_D, I915_READ(SOUTH_DSPCLK_GATE_D) | + CNP_PWM_CGE_GATING_DISABLE); } static void cnl_init_clock_gating(struct drm_i915_private *dev_priv) |