drm/i915: move vbetool invoked ier stuff
This extra bit of interrupt enabling code doesn't belong in the wait
seqno function. If anything we should pull it out to a helper so the
throttle code can also use it. The history is a bit vague, but I am
going to attempt to just dump it, unless someone can argue otherwise.
Removing this allows for a shared lock free wait seqno function. To keep
tabs on this issue though, the IER value is stored on error capture
(recommended by Chris Wilson)
v2: fixed typo EIR->IER (Ben)
Fix some white space (Ben)
Move IER capture to globally instead of per ring (Ben)
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: ier is a 16 bit reg on gen2!]
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 5c360ee..0acadc5e 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1122,6 +1122,16 @@
error->eir = I915_READ(EIR);
error->pgtbl_er = I915_READ(PGTBL_ER);
+
+ if (HAS_PCH_SPLIT(dev))
+ error->ier = I915_READ(DEIER) | I915_READ(GTIER);
+ else if (IS_VALLEYVIEW(dev))
+ error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
+ else if (IS_GEN2(dev))
+ error->ier = I915_READ16(IER);
+ else
+ error->ier = I915_READ(IER);
+
for_each_pipe(pipe)
error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));