diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 8d960d240611..dd157add7492 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4594,6 +4594,8 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc) intel_crtc->active = true; + intel_set_cpu_fifo_underrun_reporting(dev, pipe, true); + for_each_encoder_on_crtc(dev, crtc, encoder) if (encoder->pre_pll_enable) encoder->pre_pll_enable(encoder); @@ -4617,7 +4619,6 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc) intel_update_watermarks(crtc); intel_enable_pipe(intel_crtc); - intel_set_cpu_fifo_underrun_reporting(dev, pipe, true); for_each_encoder_on_crtc(dev, crtc, encoder) encoder->enable(encoder); @@ -4687,6 +4688,9 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc) intel_crtc->active = true; + if (!IS_GEN2(dev)) + intel_set_cpu_fifo_underrun_reporting(dev, pipe, true); + for_each_encoder_on_crtc(dev, crtc, encoder) if (encoder->pre_enable) encoder->pre_enable(encoder); @@ -4699,13 +4703,22 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc) intel_update_watermarks(crtc); intel_enable_pipe(intel_crtc); - intel_set_cpu_fifo_underrun_reporting(dev, pipe, true); for_each_encoder_on_crtc(dev, crtc, encoder) encoder->enable(encoder); intel_crtc_enable_planes(crtc); + /* + * Gen2 reports pipe underruns whenever all planes are disabled. + * So don't enable underrun reporting before at least some planes + * are enabled. + * FIXME: Need to fix the logic to work when we turn off all planes + * but leave the pipe running. + */ + if (IS_GEN2(dev)) + intel_set_cpu_fifo_underrun_reporting(dev, pipe, true); + drm_crtc_vblank_on(crtc); /* Underruns don't raise interrupts, so check manually. */ @@ -4738,6 +4751,15 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) if (!intel_crtc->active) return; + /* + * Gen2 reports pipe underruns whenever all planes are disabled. + * So diasble underrun reporting before all the planes get disabled. + * FIXME: Need to fix the logic to work when we turn off all planes + * but leave the pipe running. + */ + if (IS_GEN2(dev)) + intel_set_cpu_fifo_underrun_reporting(dev, pipe, false); + intel_crtc_disable_planes(crtc); for_each_encoder_on_crtc(dev, crtc, encoder) @@ -4750,7 +4772,6 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) if (IS_GEN2(dev)) intel_wait_for_vblank(dev, pipe); - intel_set_cpu_fifo_underrun_reporting(dev, pipe, false); intel_disable_pipe(dev_priv, pipe); i9xx_pfit_disable(intel_crtc); @@ -4768,6 +4789,9 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) i9xx_disable_pll(dev_priv, pipe); } + if (!IS_GEN2(dev)) + intel_set_cpu_fifo_underrun_reporting(dev, pipe, false); + intel_crtc->active = false; intel_update_watermarks(crtc);