From: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Just like irq_mask and gt_irq_mask, use it to track the status of
GEN6_PMIMR so we don't need to read it again every time we call
snb_update_pm_irq.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_irq.c | 12 +++++++-----
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9ff09a2..b621f5e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1097,6 +1097,7 @@ typedef struct drm_i915_private {
/** Cached value of IMR to avoid reads in updating the bitfield */
u32 irq_mask;
u32 gt_irq_mask;
+ u32 pm_irq_mask;
struct work_struct hotplug_work;
bool enable_hotplug_processing;
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index a1255da..d96bd1b 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -142,16 +142,17 @@ static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
- uint32_t pmimr, new_val;
+ uint32_t new_val;
assert_spin_locked(&dev_priv->irq_lock);
- pmimr = new_val = I915_READ(GEN6_PMIMR);
+ new_val = dev_priv->pm_irq_mask;
new_val &= ~interrupt_mask;
new_val |= (~enabled_irq_mask & interrupt_mask);
- if (new_val != pmimr) {
- I915_WRITE(GEN6_PMIMR, new_val);
+ if (new_val != dev_priv->pm_irq_mask) {
+ dev_priv->pm_irq_mask = new_val;
+ I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
POSTING_READ(GEN6_PMIMR);
}
}
@@ -2221,8 +2222,9 @@ static void gen5_gt_irq_postinstall(struct drm_device *dev)
if (HAS_VEBOX(dev))
pm_irqs |= PM_VEBOX_USER_INTERRUPT;
+ dev_priv->pm_irq_mask = 0xffffffff;
I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
- I915_WRITE(GEN6_PMIMR, 0xffffffff);
+ I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
I915_WRITE(GEN6_PMIER, pm_irqs);
POSTING_READ(GEN6_PMIER);
}
--
1.8.1.2
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