From: Ville Syrjälä Date: Tue, 29 Nov 2016 14:13:57 +0000 (+0200) Subject: drm/i915: Initialize dev_priv->atomic_cdclk_freq at init time X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6a259b1f8a9e99b1ed114f8bf8b0cfccee130e54;p=linux-beck.git drm/i915: Initialize dev_priv->atomic_cdclk_freq at init time 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@vger.kernel.org Cc: Matthew Auld Reported-by: Matthew Auld 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 Link: http://patchwork.freedesktop.org/patch/msgid/1480428837-4207-1-git-send-email-ville.syrjala@linux.intel.com Tested-by: Matthew Auld Reviewed-by: Matthew Auld --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3b9e60aeca51..978463671462 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -16516,6 +16516,7 @@ int intel_modeset_init(struct drm_device *dev) intel_update_czclk(dev_priv); intel_update_cdclk(dev_priv); + dev_priv->atomic_cdclk_freq = dev_priv->cdclk_freq; intel_shared_dpll_init(dev);