xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/i915: Report the failure to write to the punit

Browse Source 
The write to the punit may fail, so propagate the error code back to its
callers. Of particular interest are the RPS writes, so add appropriate
user error codes and logging.

v2: Add DEBUG for failed frequency changes during RPS.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170126101919.13211-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
This commit is contained in:
Chris Wilson
2017-01-26 10:19:19 +00:00
parent 611032bfa7
commit 9fcee2f77e
6 changed files with 53 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/i915/intel_sideband.c
View File

@@ -93,14 +93,18 @@ u32 vlv_punit_read(struct drm_i915_private *dev_priv, u32 addr)
return val;
}
void vlv_punit_write(struct drm_i915_private *dev_priv, u32 addr, u32 val)
int vlv_punit_write(struct drm_i915_private *dev_priv, u32 addr, u32 val)
{
int err;
WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
mutex_lock(&dev_priv->sb_lock);
vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
SB_CRWRDA_NP, addr, &val);
err = vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
SB_CRWRDA_NP, addr, &val);
mutex_unlock(&dev_priv->sb_lock);
return err;
}
u32 vlv_bunit_read(struct drm_i915_private *dev_priv, u32 reg)