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drm/i915: wire up gmbus irq handler

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Only enables the interrupt and puts a irq handler into place, doesn't
do anything yet.

Unfortunately there's no gmbus interrupt support for gen2/3 (safe for
pnv, but there the irq is marked as "Test mode").

v2: Wire up the irq handler for vlv and gen4 properly.

v3: i915_enable_pipestat expects the mask bit, not the status bits ... and
for added hilarity those are rather inconsistently named.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-12-01 13:53:44 +01:00
parent 61168c53f5
commit 515ac2bb95
1 changed files with 20 additions and 4 deletions
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24
drivers/gpu/drm/i915/i915_irq.c
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@ -525,6 +525,11 @@ static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
queue_work(dev_priv->wq, &dev_priv->rps.work);
}
static void gmbus_irq_handler(struct drm_device *dev)
{
DRM_DEBUG_DRIVER("GMBUS interrupt\n");
}
static irqreturn_t valleyview_irq_handler(int irq, void *arg)
{
struct drm_device *dev = (struct drm_device *) arg;
@ -590,6 +595,9 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
I915_READ(PORT_HOTPLUG_STAT);
}
if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
gmbus_irq_handler(dev);
if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
gen6_queue_rps_work(dev_priv, pm_iir);
@ -616,7 +624,7 @@ static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
SDE_AUDIO_POWER_SHIFT);
if (pch_iir & SDE_GMBUS)
DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
gmbus_irq_handler(dev);
if (pch_iir & SDE_AUDIO_HDCP_MASK)
DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
@ -662,7 +670,7 @@ static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
DRM_DEBUG_DRIVER("AUX channel interrupt\n");
if (pch_iir & SDE_GMBUS_CPT)
DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
gmbus_irq_handler(dev);
if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
@ -1880,12 +1888,14 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
SDE_PORTB_HOTPLUG_CPT |
SDE_PORTC_HOTPLUG_CPT |
SDE_PORTD_HOTPLUG_CPT);
SDE_PORTD_HOTPLUG_CPT |
SDE_GMBUS_CPT);
} else {
hotplug_mask = (SDE_CRT_HOTPLUG |
SDE_PORTB_HOTPLUG |
SDE_PORTC_HOTPLUG |
SDE_PORTD_HOTPLUG |
SDE_GMBUS |
SDE_AUX_MASK);
}
@ -1945,7 +1955,8 @@ static int ivybridge_irq_postinstall(struct drm_device *dev)
hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
SDE_PORTB_HOTPLUG_CPT |
SDE_PORTC_HOTPLUG_CPT |
SDE_PORTD_HOTPLUG_CPT);
SDE_PORTD_HOTPLUG_CPT |
SDE_GMBUS_CPT);
dev_priv->pch_irq_mask = ~hotplug_mask;
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
@ -1999,6 +2010,7 @@ static int valleyview_irq_postinstall(struct drm_device *dev)
POSTING_READ(VLV_IER);
i915_enable_pipestat(dev_priv, 0, pipestat_enable);
i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
i915_enable_pipestat(dev_priv, 1, pipestat_enable);
I915_WRITE(VLV_IIR, 0xffffffff);
@ -2483,6 +2495,7 @@ static int i965_irq_postinstall(struct drm_device *dev)
dev_priv->pipestat[0] = 0;
dev_priv->pipestat[1] = 0;
i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
/*
* Enable some error detection, note the instruction error mask
@ -2636,6 +2649,9 @@ static irqreturn_t i965_irq_handler(int irq, void *arg)
if (blc_event || (iir & I915_ASLE_INTERRUPT))
intel_opregion_asle_intr(dev);
if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
gmbus_irq_handler(dev);
/* With MSI, interrupts are only generated when iir
* transitions from zero to nonzero. If another bit got
* set while we were handling the existing iir bits, then