[Intel-gfx] [PATCH] drm/i915: Initialize dev_priv->atomic_cdclk_freq at init time

[Matthew Auld]

On 29 November 2016 at 14:13,  <ville.syrjala at linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Looks like we're only initializing dev_priv->atomic_cdclk_freq
> at resume and commit times, not at init time. Let's do that as
> well.
>
> We're now hitting the 'WARN_ON(intel_state->cdclk == 0)' in
> hsw_compute_linetime_wm() on account of populating
> intel_state->cdclk from dev_priv->atomic_cdclk_freq.
> Previously we were mispopulating intel_state->cdclk with
> dev_priv->cdclk_freq which always had a proper value at init
> time and hence the WARN_ON() didn't trigger.
>
> Cc: stable at vger.kernel.org
> Cc: Matthew Auld <matthew.auld at intel.com>
> Reported-by: Matthew Auld <matthew.auld at intel.com>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98902
> Fixes: e0ca7a6be38c ("drm/i915: Fix cdclk vs. dev_cdclk mess when not recomputing things")
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Tested-by: Matthew Auld <matthew.auld at intel.com>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>