drm/i915: Capture ERROR register on Sandybridge hangs
This holds error state from the main graphics arbiter mainly involving
the DMA engine and address translation.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 29cbcb3..2a29497 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -592,13 +592,11 @@
error->pipeastat = I915_READ(PIPEASTAT);
error->pipebstat = I915_READ(PIPEBSTAT);
error->instpm = I915_READ(INSTPM);
- if (INTEL_INFO(dev)->gen < 4) {
- error->ipeir = I915_READ(IPEIR);
- error->ipehr = I915_READ(IPEHR);
- error->instdone = I915_READ(INSTDONE);
- error->acthd = I915_READ(ACTHD);
- error->bbaddr = 0;
- } else {
+ error->error = 0;
+ if (INTEL_INFO(dev)->gen >= 6) {
+ error->error = I915_READ(ERROR_GEN6);
+ }
+ if (INTEL_INFO(dev)->gen >= 4) {
error->ipeir = I915_READ(IPEIR_I965);
error->ipehr = I915_READ(IPEHR_I965);
error->instdone = I915_READ(INSTDONE_I965);
@@ -606,6 +604,12 @@
error->instdone1 = I915_READ(INSTDONE1);
error->acthd = I915_READ(ACTHD_I965);
error->bbaddr = I915_READ64(BB_ADDR);
+ } else {
+ error->ipeir = I915_READ(IPEIR);
+ error->ipehr = I915_READ(IPEHR);
+ error->instdone = I915_READ(INSTDONE);
+ error->acthd = I915_READ(ACTHD);
+ error->bbaddr = 0;
}
bbaddr = i915_ringbuffer_last_batch(dev);