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drm/i915: Apply HWSTAM workaround for BSD ring on SandyBridge
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...we need to apply exactly the same workaround for missing interrupts
from BSD as for the BLT ring, apparently.

See also commit 498e720
(drm/i915: Fix gen6 (SNB) missed BLT ring interrupts).

Reported-and-tested-by: nkalkhof@web.de
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=38529
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>
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Chris Wilson authored and Keith Packard committed Jun 21, 2011
1 parent efc2924 commit ec6a890
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1 change: 1 addition & 0 deletions drivers/gpu/drm/i915/i915_irq.c
Original file line number Diff line number Diff line change
Expand Up @@ -1749,6 +1749,7 @@ void ironlake_irq_preinstall(struct drm_device *dev)
* happens.
*/
I915_WRITE(GEN6_BLITTER_HWSTAM, ~GEN6_BLITTER_USER_INTERRUPT);
I915_WRITE(GEN6_BSD_HWSTAM, ~GEN6_BSD_USER_INTERRUPT);
}

/* XXX hotplug from PCH */
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1 change: 1 addition & 0 deletions drivers/gpu/drm/i915/i915_reg.h
Original file line number Diff line number Diff line change
Expand Up @@ -531,6 +531,7 @@
#define GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_ENABLE 0
#define GEN6_BSD_SLEEP_PSMI_CONTROL_IDLE_INDICATOR (1 << 3)

#define GEN6_BSD_HWSTAM 0x12098
#define GEN6_BSD_IMR 0x120a8
#define GEN6_BSD_USER_INTERRUPT (1 << 12)

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