From: Ville Syrjälä Date: Fri, 21 Nov 2014 19:54:26 +0000 (+0200) Subject: drm/i915: Restore the display config after a GPU reset on gen4 X-Git-Tag: v3.19-rc2~5^2~4^2~26 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ca83b9361bf70d5d4171ba54a598a8c8f981f091;p=platform%2Fkernel%2Flinux-exynos.git drm/i915: Restore the display config after a GPU reset on gen4 On pre-ctg GPU reset also resets the display hardware. Force a mode restore after the GPU reset, and also re-init clock gating. v2: Use intel_modeset_init_hw() instead of intel_init_clock_gating() in case more relevant stuff gets added there at some point Restore interrupts after the reset as well Tested-by: Kenneth Graunke Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 1e9c136..68e4239 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -880,6 +880,24 @@ int i915_reset(struct drm_device *dev) */ if (INTEL_INFO(dev)->gen > 5) intel_reset_gt_powersave(dev); + + if (IS_GEN4(dev) && !IS_G4X(dev)) { + intel_runtime_pm_disable_interrupts(dev_priv); + intel_runtime_pm_enable_interrupts(dev_priv); + + intel_modeset_init_hw(dev); + + spin_lock_irq(&dev_priv->irq_lock); + if (dev_priv->display.hpd_irq_setup) + dev_priv->display.hpd_irq_setup(dev); + spin_unlock_irq(&dev_priv->irq_lock); + + drm_modeset_lock_all(dev); + intel_modeset_setup_hw_state(dev, true); + drm_modeset_unlock_all(dev); + + intel_hpd_init(dev_priv); + } } else { mutex_unlock(&dev->struct_mutex); }