From b0cd324faed23d10d66ba6ade66579c681feef6f Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Wed, 12 Nov 2014 16:25:43 +0200 Subject: drm/i915: don't save/restore backlight hist ctl registers This is not used within the driver, and merely saving/restoring these registers isn't going to do any good anyway. In fact, it's possible it's actively harmful. Any code enabling the feature should handle this completely in the regular platform specific enable/disable backlight functions. Signed-off-by: Jani Nikula Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_suspend.c | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-) (limited to 'drivers/gpu/drm/i915/i915_suspend.c') diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index df2b7f18a679..3c1fccfacac1 100644 --- a/drivers/gpu/drm/i915/i915_suspend.c +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -207,14 +207,8 @@ static void i915_save_display(struct drm_device *dev) dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL); if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) dev_priv->regfile.saveLVDS = I915_READ(PCH_LVDS); - } else if (IS_VALLEYVIEW(dev)) { - dev_priv->regfile.saveBLC_HIST_CTL = - I915_READ(VLV_BLC_HIST_CTL(PIPE_A)); - dev_priv->regfile.saveBLC_HIST_CTL_B = - I915_READ(VLV_BLC_HIST_CTL(PIPE_B)); - } else { + } else if (!IS_VALLEYVIEW(dev)) { dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL); - dev_priv->regfile.saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL); if (IS_MOBILE(dev) && !IS_I830(dev)) dev_priv->regfile.saveLVDS = I915_READ(LVDS); } @@ -262,13 +256,7 @@ static void i915_restore_display(struct drm_device *dev) I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); I915_WRITE(PCH_PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); I915_WRITE(PCH_PP_CONTROL, dev_priv->regfile.savePP_CONTROL); - } else if (IS_VALLEYVIEW(dev)) { - I915_WRITE(VLV_BLC_HIST_CTL(PIPE_A), - dev_priv->regfile.saveBLC_HIST_CTL); - I915_WRITE(VLV_BLC_HIST_CTL(PIPE_B), - dev_priv->regfile.saveBLC_HIST_CTL); - } else { - I915_WRITE(BLC_HIST_CTL, dev_priv->regfile.saveBLC_HIST_CTL); + } else if (!IS_VALLEYVIEW(dev)) { I915_WRITE(PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS); I915_WRITE(PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); I915_WRITE(PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); -- cgit v1.2.1