[Bug 75244] [BYT Regression]igt/gem_concurrent_blit/gtt-gpu-read-after-write-forked causes *ERROR* timed out waiting for Punit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75244

--- Comment #20 from lu hua <huax.lu at intel.com> ---
Created attachment 102457
  --> https://bugs.freedesktop.org/attachment.cgi?id=102457&action=edit
dmesg

> 
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c
> b/drivers/gpu/drm/i915/intel_pm.c
> index 0115689..1fea122 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3254,18 +3254,18 @@ static void vlv_set_rps_idle(struct drm_i915_private
> *dev_priv)
>         /* Mask turbo interrupt so that they will not come in between */
>         I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
> 
> -       vlv_force_gfx_clock(dev_priv, true);
> -
>         dev_priv->rps.cur_freq = dev_priv->rps.min_freq_softlimit;
> 
> +       gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
> +
>         vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ,
>                                         dev_priv->rps.min_freq_softlimit);
> 
>         if (wait_for(((vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS))
> -                               & GENFREQSTATUS) == 0, 5))
> +                               & GENFREQSTATUS) == 0, 10))
>                 DRM_ERROR("timed out waiting for Punit\n");
> 
> -       vlv_force_gfx_clock(dev_priv, false);
> +       gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
> 
>         I915_WRITE(GEN6_PMINTRMSK,
>                    gen6_rps_pm_mask(dev_priv, dev_priv->rps.cur_freq));


Test this patch, it still exists.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20140709/9cda349c/attachment.html>