UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915/chv: Skip gen6_gt_check_fifodbg() on CHV 

CHV uses the gen8 shadow register mechanism so we shouldn't be
checking the GT FIFO status.

This effectively removes the posting read, so add an explicit
posting read using FORCEWAKE_ACK_VLV (which is what use in
vlv_forcewake_reset()).

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-05-23 21:00:19 +05:30 committed by Daniel Vetter
parent 3f4e349587
commit ab53c267f2
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/intel_uncore.c
View File

@ -250,9 +250,10 @@ static void __vlv_force_wake_put(struct drm_i915_private *dev_priv,
__raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
_MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
/* The below doubles as a POSTING_READ */
gen6_gt_check_fifodbg(dev_priv);
/* something from same cacheline, but !FORCEWAKE_VLV */
__raw_posting_read(dev_priv, FORCEWAKE_ACK_VLV);
if (!IS_CHERRYVIEW(dev_priv->dev))
gen6_gt_check_fifodbg(dev_priv);
}
static void vlv_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)