From: Paulo Zanoni Date: Fri, 4 Jul 2014 14:50:31 +0000 (-0300) Subject: drm/i915: extract and improve gen8_irq_power_well_post_enable X-Git-Tag: firefly_0821_release~176^2~3450^2~20^2~27 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d49bdb0e1054d022cc6f88fcecf9c79bae66eab0;p=firefly-linux-kernel-4.4.55.git drm/i915: extract and improve gen8_irq_power_well_post_enable Move it from hsw_power_well_post_enable() (intel_pm.c) to i915_irq.c so we can reuse the nice IRQ macros we have there. The main difference is that now we're going to check if the IIR register is non-zero when we try to re-enable the interrupts. Signed-off-by: Paulo Zanoni Reviewed-by: Rodrigo Vivi Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 6f19420cc1bf..e2e9bb8f4fe7 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -3478,6 +3478,18 @@ static void gen8_irq_reset(struct drm_device *dev) ibx_irq_reset(dev); } +void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv) +{ + unsigned long irqflags; + + spin_lock_irqsave(&dev_priv->irq_lock, irqflags); + GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_B, dev_priv->de_irq_mask[PIPE_B], + ~dev_priv->de_irq_mask[PIPE_B]); + GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_C, dev_priv->de_irq_mask[PIPE_C], + ~dev_priv->de_irq_mask[PIPE_C]); + spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); +} + static void cherryview_irq_preinstall(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 9d97a50cae4b..bf415df11389 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -693,6 +693,7 @@ void intel_runtime_pm_disable_interrupts(struct drm_device *dev); void intel_runtime_pm_restore_interrupts(struct drm_device *dev); int intel_get_crtc_scanline(struct intel_crtc *crtc); void i9xx_check_fifo_underruns(struct drm_device *dev); +void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv); /* intel_crt.c */ diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 25ae4e6d3dd6..d23ba37e6ab9 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5998,7 +5998,6 @@ bool intel_display_power_enabled(struct drm_i915_private *dev_priv, static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; - unsigned long irqflags; /* * After we re-enable the power well, if we touch VGA register 0x3d5 @@ -6014,21 +6013,8 @@ static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); - if (IS_BROADWELL(dev)) { - spin_lock_irqsave(&dev_priv->irq_lock, irqflags); - I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_B), - dev_priv->de_irq_mask[PIPE_B]); - I915_WRITE(GEN8_DE_PIPE_IER(PIPE_B), - ~dev_priv->de_irq_mask[PIPE_B] | - GEN8_PIPE_VBLANK); - I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_C), - dev_priv->de_irq_mask[PIPE_C]); - I915_WRITE(GEN8_DE_PIPE_IER(PIPE_C), - ~dev_priv->de_irq_mask[PIPE_C] | - GEN8_PIPE_VBLANK); - POSTING_READ(GEN8_DE_PIPE_IER(PIPE_C)); - spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); - } + if (IS_BROADWELL(dev)) + gen8_irq_power_well_post_enable(dev_priv); } static void hsw_set_power_well(struct drm_i915_private *dev_priv,