[Bug 71701] Regression, Dual-Head, i915 mode-setting driver, "pipe B stuck"
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Mon Mar 10 14:23:16 PDT 2014
https://bugzilla.kernel.org/show_bug.cgi?id=71701
Chris Wilson <chris at chris-wilson.co.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |chris at chris-wilson.co.uk
--- Comment #5 from Chris Wilson <chris at chris-wilson.co.uk> ---
That's an unexpected result. There is one issue in the patch, but it should be
harmless:
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c
b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 10fd19f..bc7abf4 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1638,14 +1638,16 @@ int intel_ring_begin(struct intel_ring_buffer *ring,
}
/* Align the ring tail to a cacheline boundary */
+#define CACHELINE_ALIGN 64
int intel_ring_cacheline_align(struct intel_ring_buffer *ring)
{
- int num_dwords = (64 - (ring->tail & 63)) / sizeof(uint32_t);
+ int num_dwords = (ring->tail & (CACHELINE_ALIGN - 1)) /
sizeof(uint32_t);
int ret;
if (num_dwords == 0)
return 0;
+ num_dwords = CACHELINE_ALIGN / sizeof(uint32_t) - num_dwords;
ret = intel_ring_begin(ring, num_dwords);
if (ret)
return ret;
--
You are receiving this mail because:
You are on the CC list for the bug.
More information about the intel-gfx-bugs
mailing list