drm/i915/gen9: Initialize intel_state->active_crtcs during WM sanitization (v2)
authorMatt Roper <matthew.d.roper@intel.com>
Fri, 17 Jun 2016 20:42:18 +0000 (13:42 -0700)
committerMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Thu, 18 Aug 2016 12:26:41 +0000 (14:26 +0200)
commit1b54a880b250acc226b13cea221b90aa1b3e37dd
treefa30a36076f3ed6dad7e969580ad8880eaa5b4f8
parentceae5317f608aaabf3e03377e061e44c7345cc6a
drm/i915/gen9: Initialize intel_state->active_crtcs during WM sanitization (v2)

intel_state->active_crtcs is usually only initialized when doing a
modeset.  During our first atomic commit after boot, we're effectively
faking a modeset to sanitize the DDB/wm setup, so ensure that this field
gets initialized before use.

v2:
 - Don't clobber active_crtcs if our first commit really is a modeset
   (Maarten)
 - Grab connection_mutex when faking a modeset during sanitization
   (Maarten)

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Tested-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466196140-16336-2-git-send-email-matthew.d.roper@intel.com
Cc: stable@vger.kernel.org #v4.7+
drivers/gpu/drm/i915/intel_pm.c