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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-11-29 16:13:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-09 08:32:26 +0100 |
| commit | 6396411054430a6473233735b6e0208759b68291 (patch) | |
| tree | 682917365d4857adb1749fa22bb90ce01bc6a987 | |
| parent | 159e2ea9ed4996e3398cb9174921a4543c785ed2 (diff) | |
| download | linux-stable-6396411054430a6473233735b6e0208759b68291.tar.gz linux-stable-6396411054430a6473233735b6e0208759b68291.tar.bz2 linux-stable-6396411054430a6473233735b6e0208759b68291.zip | |
drm/i915: Initialize dev_priv->atomic_cdclk_freq at init time
commit 1f3dc3e334c1192ebe2939ea17ba12f4776f90c3 upstream.
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: Matthew Auld <matthew.auld@intel.com>
Reported-by: Matthew Auld <matthew.auld@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98902
Fixes: 14676ec6b1a6 ("drm/i915: Fix cdclk vs. dev_cdclk mess when not recomputing things")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1480428837-4207-1-git-send-email-ville.syrjala@linux.intel.com
Tested-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
(cherry picked from commit 6a259b1f8a9e99b1ed114f8bf8b0cfccee130e54)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 592694c9de7d..71441c329603 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -16443,6 +16443,7 @@ void intel_modeset_init(struct drm_device *dev) intel_update_czclk(dev_priv); intel_update_cdclk(dev); + dev_priv->atomic_cdclk_freq = dev_priv->cdclk_freq; intel_shared_dpll_init(dev); |