drm/i915: print Gen5+ CPU/PCH poison interrupts
This is bad news and shouldn't be happening.
V2: Rebase.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index c79793e..dae8953 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1023,6 +1023,9 @@
struct drm_i915_private *dev_priv = dev->dev_private;
u32 err_int = I915_READ(GEN7_ERR_INT);
+ if (err_int & ERR_INT_POISON)
+ DRM_ERROR("Poison interrupt\n");
+
if (err_int & ERR_INT_FIFO_UNDERRUN_A)
if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
@@ -1043,6 +1046,9 @@
struct drm_i915_private *dev_priv = dev->dev_private;
u32 serr_int = I915_READ(SERR_INT);
+ if (serr_int & SERR_INT_POISON)
+ DRM_ERROR("PCH poison interrupt\n");
+
if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
false))
@@ -1261,6 +1267,9 @@
if (de_iir & DE_PIPEB_VBLANK)
drm_handle_vblank(dev, 1);
+ if (de_iir & DE_POISON)
+ DRM_ERROR("Poison interrupt\n");
+
if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
@@ -2496,7 +2505,7 @@
if (HAS_PCH_IBX(dev)) {
mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER |
- SDE_TRANSA_FIFO_UNDER;
+ SDE_TRANSA_FIFO_UNDER | SDE_POISON;
} else {
mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT;
@@ -2517,7 +2526,7 @@
u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
DE_AUX_CHANNEL_A | DE_PIPEB_FIFO_UNDERRUN |
- DE_PIPEA_FIFO_UNDERRUN;
+ DE_PIPEA_FIFO_UNDERRUN | DE_POISON;
u32 render_irqs;
dev_priv->irq_mask = ~display_mask;