From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Unify the appearance of the gen2 irq code with the gen3+ code by
introducing the GEN2_IRQ_RESET/INIT macros.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_irq.c | 53 +++++++++++++++++++++++++++++++----------
1 file changed, 41 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 997c1955c88b..204dac7a5529 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -136,6 +136,16 @@ static const u32 hpd_bxt[HPD_NUM_PINS] = {
POSTING_READ(type##IIR); \
} while (0)
+#define GEN2_IRQ_RESET(type) do { \
+ I915_WRITE16(type##IMR, 0xffff); \
+ POSTING_READ16(type##IMR); \
+ I915_WRITE16(type##IER, 0); \
+ I915_WRITE16(type##IIR, 0xffff); \
+ POSTING_READ16(type##IIR); \
+ I915_WRITE16(type##IIR, 0xffff); \
+ POSTING_READ16(type##IIR); \
+} while (0)
+
/*
* We should clear IMR at preinstall/uninstall, and just check at postinstall.
*/
@@ -155,6 +165,22 @@ static void gen3_assert_iir_is_zero(struct drm_i915_private *dev_priv,
POSTING_READ(reg);
}
+static void gen2_assert_iir_is_zero(struct drm_i915_private *dev_priv,
+ i915_reg_t reg)
+{
+ u16 val = I915_READ16(reg);
+
+ if (val == 0)
+ return;
+
+ WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
+ i915_mmio_reg_offset(reg), val);
+ I915_WRITE16(reg, 0xffff);
+ POSTING_READ16(reg);
+ I915_WRITE16(reg, 0xffff);
+ POSTING_READ16(reg);
+}
+
#define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
gen3_assert_iir_is_zero(dev_priv, GEN8_##type##_IIR(which)); \
I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
@@ -169,6 +195,13 @@ static void gen3_assert_iir_is_zero(struct drm_i915_private *dev_priv,
POSTING_READ(type##IMR); \
} while (0)
+#define GEN2_IRQ_INIT(type, imr_val, ier_val) do { \
+ gen2_assert_iir_is_zero(dev_priv, type##IIR); \
+ I915_WRITE16(type##IER, (ier_val)); \
+ I915_WRITE16(type##IMR, (imr_val)); \
+ POSTING_READ16(type##IMR); \
+} while (0)
+
static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
@@ -3613,14 +3646,13 @@ static void i8xx_irq_preinstall(struct drm_device * dev)
i9xx_pipestat_irq_reset(dev_priv);
- I915_WRITE16(IMR, 0xffff);
- I915_WRITE16(IER, 0x0);
- POSTING_READ16(IER);
+ GEN2_IRQ_RESET();
}
static int i8xx_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ u16 enable_mask;
I915_WRITE16(EMR,
~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
@@ -3631,13 +3663,12 @@ static int i8xx_irq_postinstall(struct drm_device *dev)
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
- I915_WRITE16(IMR, dev_priv->irq_mask);
+ enable_mask =
+ I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
+ I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
+ I915_USER_INTERRUPT;
- I915_WRITE16(IER,
- I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
- I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
- I915_USER_INTERRUPT);
- POSTING_READ16(IER);
+ GEN2_IRQ_INIT(, dev_priv->irq_mask, enable_mask);
/* Interrupt setup is already guaranteed to be single-threaded, this is
* just to make the assert_spin_locked check happy. */
@@ -3764,9 +3795,7 @@ static void i8xx_irq_uninstall(struct drm_device * dev)
i9xx_pipestat_irq_reset(dev_priv);
- I915_WRITE16(IMR, 0xffff);
- I915_WRITE16(IER, 0x0);
- I915_WRITE16(IIR, I915_READ16(IIR));
+ GEN2_IRQ_RESET();
}
static void i915_irq_preinstall(struct drm_device * dev)
--
2.13.0
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