| From | Kamal Mostafa <> | Subject | [PATCH 4.2.y-ckt 004/206] drm/i915: Call intel_dp_mst_resume() before resuming displays | Date | Thu, 9 Jun 2016 14:13:33 -0700 |
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4.2.8-ckt12 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Lyude <cpaul@redhat.com>
commit a16b7658f4e0d4aec9bc3e75a5f0cc3f7a3a0422 upstream.
Since we need MST devices ready before we try to resume displays, calling this after intel_display_resume() can result in some issues with various laptop docks where the monitor won't turn back on after suspending the system.
This order was originally changed in
commit e7d6f7d70829 ("drm/i915: resume MST after reading back hw state")
In order to fix some unclaimed register errors, however the actual cause of those has since been fixed.
Signed-off-by: Lyude <cpaul@redhat.com> [danvet: Resolve conflicts with locking changes.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> [ kamal: backport to 4.2-stable: context ] Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/gpu/drm/i915/i915_drv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 9d42aeb..2188b7f 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -762,12 +762,12 @@ static int i915_drm_resume(struct drm_device *dev) dev_priv->display.hpd_irq_setup(dev); spin_unlock_irq(&dev_priv->irq_lock); + intel_dp_mst_resume(dev); + drm_modeset_lock_all(dev); intel_modeset_setup_hw_state(dev, true); drm_modeset_unlock_all(dev); - intel_dp_mst_resume(dev); - /* * ... but also need to make sure that hotplug processing * doesn't cause havoc. Like in the driver load code we don't -- 2.7.4
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