On Fri, 18 Jan 2013, Paulo Zanoni <przan...@gmail.com> wrote:
> From: Paulo Zanoni <paulo.r.zan...@intel.com>
>
> Because the register does not exist in gen5+.
>
> This patch solves "unclaimed register" messages on Haswell after
> suspend/resume.
Reviewed-by: Jani Nikula <jani.nik...@intel.com>
>
> Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com>
> ---
> drivers/gpu/drm/i915/i915_suspend.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_suspend.c
> b/drivers/gpu/drm/i915/i915_suspend.c
> index 63d4d30..95c0582 100644
> --- a/drivers/gpu/drm/i915/i915_suspend.c
> +++ b/drivers/gpu/drm/i915/i915_suspend.c
> @@ -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) */
> --
> 1.7.10.4
>
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