diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-09-08 17:02:09 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-09-14 16:17:19 +0300 |
| commit | b41e58ffe49172eb260e95c217d3e1f0f7432ba6 (patch) | |
| tree | dfaf400c2733413c6935a53281cd2fb6904574f2 /drivers/gpu | |
| parent | e8fac46c783a444dd0d140bb84eae3247dfebb59 (diff) | |
| download | linux-b41e58ffe49172eb260e95c217d3e1f0f7432ba6.tar.bz2 | |
drm/i915: Nuke MI_ARB_STATE save/restore
Originally added in commit 1f84e550a870 ("drm/i915 more registers for
S3 (DSPCLK_GATE_D, CACHE_MODE_0, MI_ARB_STATE)") to fix some underruns.
I suspect that was due to the trickle feed settings getting clobbered
during suspend. We've been disabling trickle feed explicitly since
commit 20f949670f51 ("drm/i915: Disable trickle feed via MI_ARB_STATE
for the gen4") so this magic save/restore should no longer be needed.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200908140210.31048-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_suspend.c | 6 |
2 files changed, 0 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 312974d1ffab..3b5166bb8b26 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -538,7 +538,6 @@ struct intel_gmbus { struct i915_suspend_saved_registers { u32 saveDSPARB; u32 saveCACHE_MODE_0; - u32 saveMI_ARB_STATE; u32 saveSWF0[16]; u32 saveSWF1[16]; u32 saveSWF3[3]; diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index 33ee3796c849..80d9d2747640 100644 --- a/drivers/gpu/drm/i915/i915_suspend.c +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -75,9 +75,6 @@ int i915_save_state(struct drm_i915_private *dev_priv) if (INTEL_GEN(dev_priv) < 7) dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0); - /* Memory Arbitration state */ - dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE); - /* Scratch space */ if (IS_GEN(dev_priv, 2) && IS_MOBILE(dev_priv)) { for (i = 0; i < 7; i++) { @@ -112,9 +109,6 @@ int i915_restore_state(struct drm_i915_private *dev_priv) I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 | 0xffff0000); - /* Memory arbitration state */ - I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000); - /* Scratch space */ if (IS_GEN(dev_priv, 2) && IS_MOBILE(dev_priv)) { for (i = 0; i < 7; i++) { |