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drm/i915: don't save/restore DSPARB on gen5+

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Because the register does not exist in gen5+.

This patch solves "unclaimed register" messages on Haswell after
suspend/resume.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2013-01-18 18:29:03 -02:00 committed by Daniel Vetter
parent c00db24639
commit 8de0add723
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/i915_suspend.c
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@ -620,7 +620,8 @@ static void i915_save_display(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
/* Display arbitration control */
dev_priv->regfile.saveDSPARB = I915_READ(DSPARB);
if (INTEL_INFO(dev)->gen <= 4)
dev_priv->regfile.saveDSPARB = I915_READ(DSPARB);
/* This is only meaningful in non-KMS mode */
/* Don't regfile.save them in KMS mode */
@ -707,7 +708,8 @@ static void i915_restore_display(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
/* Display arbitration */
I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB);
if (INTEL_INFO(dev)->gen <= 4)
I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB);
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
/* Display port ratios (must be done before clock is set) */