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drm/i915: don't save/restore DP regs for kms

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We completely compute these anew in each modeset, hence we don't rely
on them containing anything valid after resume.

To avoid breaking any ums setup due to reordering of the reads/writes
simply don't reorder anything, but bracket the reads/writes into if
(!kms) conditionals. More churn, but safer.

v2: Fixup the logic, noticed by Paulo Zanoni.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-10-17 11:32:55 +02:00
parent 7346bfa00d
commit f81183f76a
1 changed files with 36 additions and 30 deletions
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6
drivers/gpu/drm/i915/i915_suspend.c
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@ -654,6 +654,7 @@ static void i915_save_display(struct drm_device *dev)
dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
}
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
/* Display Port state */
if (SUPPORTS_INTEGRATED_DP(dev)) {
dev_priv->saveDP_B = I915_READ(DP_B);
@ -669,6 +670,7 @@ static void i915_save_display(struct drm_device *dev)
dev_priv->savePIPEB_DP_LINK_N = I915_READ(_PIPEB_DP_LINK_N);
}
/* FIXME: save TV & SDVO state */
}
/* Only save FBC state on the platform that supports FBC */
if (I915_HAS_FBC(dev)) {
@ -703,6 +705,7 @@ static void i915_restore_display(struct drm_device *dev)
/* Display arbitration */
I915_WRITE(DSPARB, dev_priv->saveDSPARB);
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
/* Display port ratios (must be done before clock is set) */
if (SUPPORTS_INTEGRATED_DP(dev)) {
I915_WRITE(_PIPEA_GMCH_DATA_M, dev_priv->savePIPEA_GMCH_DATA_M);
@ -714,6 +717,7 @@ static void i915_restore_display(struct drm_device *dev)
I915_WRITE(_PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
I915_WRITE(_PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
}
}
/* This is only meaningful in non-KMS mode */
/* Don't restore them in KMS mode */
@ -761,6 +765,7 @@ static void i915_restore_display(struct drm_device *dev)
I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
}
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
/* Display Port state */
if (SUPPORTS_INTEGRATED_DP(dev)) {
I915_WRITE(DP_B, dev_priv->saveDP_B);
@ -768,6 +773,7 @@ static void i915_restore_display(struct drm_device *dev)
I915_WRITE(DP_D, dev_priv->saveDP_D);
}
/* FIXME: restore TV & SDVO state */
}
/* only restore FBC info on the platform that supports FBC*/
intel_disable_fbc(dev);