From: Ville Syrjälä Date: Mon, 11 Apr 2016 13:56:27 +0000 (+0300) Subject: drm/i915: Clear display interrupt before enabling when turning on the power well X-Git-Tag: v4.7-rc1~77^2~37^2~119 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d6c698035892c143e5cff5342477d3fd755b13fe;p=karo-tx-linux.git drm/i915: Clear display interrupt before enabling when turning on the power well For a bit of extra paranoia make sure the display irqs are all cleared before we enabled them when turning on the power well. This should really be the case already since the power well was off which resets everything. Signed-off-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1460382992-28728-6-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak --- diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 6885c0d12167..5fc0f2e3b083 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -3309,13 +3309,6 @@ static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv) u32 iir_mask; enum pipe pipe; - pipestat_mask = PIPESTAT_INT_STATUS_MASK | - PIPE_FIFO_UNDERRUN_STATUS; - - for_each_pipe(dev_priv, pipe) - I915_WRITE(PIPESTAT(pipe), pipestat_mask); - POSTING_READ(PIPESTAT(PIPE_A)); - pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV | PIPE_CRC_DONE_INTERRUPT_STATUS; @@ -3699,8 +3692,10 @@ void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv) dev_priv->display_irqs_enabled = true; - if (intel_irqs_enabled(dev_priv)) + if (intel_irqs_enabled(dev_priv)) { + vlv_display_irq_reset(dev_priv); vlv_display_irq_postinstall(dev_priv); + } } void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)