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drm/i915/cnp: Don't touch other PCH clock gating bits.

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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: 0a46ddd57c ("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
This commit is contained in:
Rodrigo Vivi 2017-09-08 16:45:33 -07:00
parent da83ef85f5
commit 4cc6feb715
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_pm.c
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@ -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)