drm/i915: don't save/restore DP regs for kms
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>
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 4776ccf..69b2d7f 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -654,21 +654,23 @@
dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
}
- /* Display Port state */
- if (SUPPORTS_INTEGRATED_DP(dev)) {
- dev_priv->saveDP_B = I915_READ(DP_B);
- dev_priv->saveDP_C = I915_READ(DP_C);
- dev_priv->saveDP_D = I915_READ(DP_D);
- dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(_PIPEA_GMCH_DATA_M);
- dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(_PIPEB_GMCH_DATA_M);
- dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(_PIPEA_GMCH_DATA_N);
- dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(_PIPEB_GMCH_DATA_N);
- dev_priv->savePIPEA_DP_LINK_M = I915_READ(_PIPEA_DP_LINK_M);
- dev_priv->savePIPEB_DP_LINK_M = I915_READ(_PIPEB_DP_LINK_M);
- dev_priv->savePIPEA_DP_LINK_N = I915_READ(_PIPEA_DP_LINK_N);
- dev_priv->savePIPEB_DP_LINK_N = I915_READ(_PIPEB_DP_LINK_N);
+ if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
+ /* Display Port state */
+ if (SUPPORTS_INTEGRATED_DP(dev)) {
+ dev_priv->saveDP_B = I915_READ(DP_B);
+ dev_priv->saveDP_C = I915_READ(DP_C);
+ dev_priv->saveDP_D = I915_READ(DP_D);
+ dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(_PIPEA_GMCH_DATA_M);
+ dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(_PIPEB_GMCH_DATA_M);
+ dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(_PIPEA_GMCH_DATA_N);
+ dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(_PIPEB_GMCH_DATA_N);
+ dev_priv->savePIPEA_DP_LINK_M = I915_READ(_PIPEA_DP_LINK_M);
+ dev_priv->savePIPEB_DP_LINK_M = I915_READ(_PIPEB_DP_LINK_M);
+ dev_priv->savePIPEA_DP_LINK_N = I915_READ(_PIPEA_DP_LINK_N);
+ dev_priv->savePIPEB_DP_LINK_N = I915_READ(_PIPEB_DP_LINK_N);
+ }
+ /* FIXME: save TV & SDVO state */
}
- /* FIXME: save TV & SDVO state */
/* Only save FBC state on the platform that supports FBC */
if (I915_HAS_FBC(dev)) {
@@ -703,16 +705,18 @@
/* Display arbitration */
I915_WRITE(DSPARB, dev_priv->saveDSPARB);
- /* 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);
- I915_WRITE(_PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
- I915_WRITE(_PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
- I915_WRITE(_PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
- I915_WRITE(_PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
- I915_WRITE(_PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
- I915_WRITE(_PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
- I915_WRITE(_PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
+ 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);
+ I915_WRITE(_PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
+ I915_WRITE(_PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
+ I915_WRITE(_PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
+ I915_WRITE(_PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
+ I915_WRITE(_PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
+ 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 */
@@ -761,13 +765,15 @@
I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
}
- /* Display Port state */
- if (SUPPORTS_INTEGRATED_DP(dev)) {
- I915_WRITE(DP_B, dev_priv->saveDP_B);
- I915_WRITE(DP_C, dev_priv->saveDP_C);
- I915_WRITE(DP_D, dev_priv->saveDP_D);
+ if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
+ /* Display Port state */
+ if (SUPPORTS_INTEGRATED_DP(dev)) {
+ I915_WRITE(DP_B, dev_priv->saveDP_B);
+ I915_WRITE(DP_C, dev_priv->saveDP_C);
+ I915_WRITE(DP_D, dev_priv->saveDP_D);
+ }
+ /* FIXME: restore TV & SDVO state */
}
- /* FIXME: restore TV & SDVO state */
/* only restore FBC info on the platform that supports FBC*/
intel_disable_fbc(dev);