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drm/i915: extract ibx_display_interrupt_update 

This way all changes to SDEIMR all go through the same function, with
the exception of the (single-threaded) setup/teardown code.

For paranoia again add an assert_spin_locked.

v2: For even more paranoia also sprinkle a spinlock assert over
cpt_can_enable_serr_int since we need to have that one there, too.

v3: Fix the logic of interrupt enabling, add enable/disable macros for
the simple cases in the fifo code and add a comment. All requested by
Paulo.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2013-07-04 23:35:21 +02:00
parent 12f56f5192
commit fee884ed28
1 changed files with 36 additions and 15 deletions
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51
drivers/gpu/drm/i915/i915_irq.c
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@ -128,6 +128,8 @@ static bool cpt_can_enable_serr_int(struct drm_device *dev)
enum pipe pipe;
struct intel_crtc *crtc;
assert_spin_locked(&dev_priv->irq_lock);
for_each_pipe(pipe) {
crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
@ -170,6 +172,30 @@ static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
}
}
/**
* ibx_display_interrupt_update - update SDEIMR
* @dev_priv: driver private
* @interrupt_mask: mask of interrupt bits to update
* @enabled_irq_mask: mask of interrupt bits to enable
*/
static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
uint32_t sdeimr = I915_READ(SDEIMR);
sdeimr &= ~interrupt_mask;
sdeimr |= (~enabled_irq_mask & interrupt_mask);
assert_spin_locked(&dev_priv->irq_lock);
I915_WRITE(SDEIMR, sdeimr);
POSTING_READ(SDEIMR);
}
#define ibx_enable_display_interrupt(dev_priv, bits) \
ibx_display_interrupt_update((dev_priv), (bits), (bits))
#define ibx_disable_display_interrupt(dev_priv, bits) \
ibx_display_interrupt_update((dev_priv), (bits), 0)
static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc,
bool enable)
{
@ -179,11 +205,9 @@ static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc,
SDE_TRANSB_FIFO_UNDER;
if (enable)
I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~bit);
ibx_enable_display_interrupt(dev_priv, bit);
else
I915_WRITE(SDEIMR, I915_READ(SDEIMR) | bit);
POSTING_READ(SDEIMR);
ibx_disable_display_interrupt(dev_priv, bit);
}
static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
@ -200,12 +224,10 @@ static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
SERR_INT_TRANS_B_FIFO_UNDERRUN |
SERR_INT_TRANS_C_FIFO_UNDERRUN);
I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~SDE_ERROR_CPT);
ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT);
} else {
I915_WRITE(SDEIMR, I915_READ(SDEIMR) | SDE_ERROR_CPT);
ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT);
}
POSTING_READ(SDEIMR);
}
/**
@ -2652,22 +2674,21 @@ static void ibx_hpd_irq_setup(struct drm_device *dev)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
struct drm_mode_config *mode_config = &dev->mode_config;
struct intel_encoder *intel_encoder;
u32 mask = ~I915_READ(SDEIMR);
u32 hotplug;
u32 hotplug_irqs, hotplug, enabled_irqs = 0;
if (HAS_PCH_IBX(dev)) {
mask &= ~SDE_HOTPLUG_MASK;
hotplug_irqs = SDE_HOTPLUG_MASK;
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
mask |= hpd_ibx[intel_encoder->hpd_pin];
enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin];
} else {
mask &= ~SDE_HOTPLUG_MASK_CPT;
hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
mask |= hpd_cpt[intel_encoder->hpd_pin];
enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin];
}
I915_WRITE(SDEIMR, ~mask);
ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
/*
* Enable digital hotplug on the PCH, and configure the DP short pulse