[PATCH 3/5] drm/i915: extract and improve gen8_irq_power_well_post_enable

Paulo Zanoni
2014-07-04T14:50:48Z

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

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 <paulo.r.zanoni@intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 12 ++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_pm.c | 18 ++----------------
3 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 2e116e9d..a8b8b6b 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3204,6 +3204,18 @@ 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 5f7c7bd..46a3a09 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -687,6 +687,7 @@ 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 31ae2b4..4cc9e5c 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5913,7 +5913,6 @@ 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
@@ -5929,21 +5928,8 @@ 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,
--
2.0.0