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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [IGT][BDW] spurious dmesg "Switching to FCLK failed" vairous kms_cursor_crc and/or kms_flip tests"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102243#c13">Comment # 13</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [IGT][BDW] spurious dmesg "Switching to FCLK failed" vairous kms_cursor_crc and/or kms_flip tests"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102243">bug 102243</a>
from <span class="vcard"><a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> <span class="fn">Marta Löfstedt</span></a>
</span></b>
<pre>reproduce 1/10 runs with same list as above with:
+++ b/drivers/gpu/drm/i915/intel_cdclk.c
@@ -665,6 +665,7 @@ static void bdw_set_cdclk(struct drm_i915_private
*dev_priv,
return;
}
+ pm_qos_update_request(&dev_priv->pm_qos, 0);
val = I915_READ(LCPLL_CTL);
val |= LCPLL_CD_SOURCE_FCLK;
I915_WRITE(LCPLL_CTL, val);
@@ -672,7 +673,8 @@ static void bdw_set_cdclk(struct drm_i915_private
*dev_priv,
if (wait_for_us(I915_READ(LCPLL_CTL) &
LCPLL_CD_SOURCE_FCLK_DONE, 1))
DRM_ERROR("Switching to FCLK failed\n");
-
+ pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE);</pre>
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