Commit 79cf219a authored Aug 24, 2016 by Chris Wilson

drm/i915: Suppress DRM_ERROR for D_COMP write on Haswell

The D_COMP (render decompression) register write is followed by a status
check and another error (either that the decompression shutdown or the
lpll is enabled). Since we are followed by another, more pertinent,
error we can reduce the pcode timeout to a debug and squelch a sporadic
error message during suspend.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97465

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20160824101607.13671-1-chris@chris-wilson.co.uk

Reviewed-by: Matthew Auld <matthew.auld@intel.com>

parent c82dd884

drivers/gpu/drm/i915/intel_display.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -10022,7 +10022,7 @@ static void hsw_write_dcomp(struct drm_i915_private *dev_priv, uint32_t val)
		mutex_lock(&dev_priv->rps.hw_lock);
		if (sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_D_COMP,
		val))
		DRM_ERROR("Failed to write to D_COMP\n");
		DRM_DEBUG_KMS("Failed to write to D_COMP\n");
		mutex_unlock(&dev_priv->rps.hw_lock);
		} else {
		I915_WRITE(D_COMP_BDW, val);