[Intel-gfx] [PATCH 2/4] drm/i915: Turn on watchdog interrupts

[Ben Widawsky]

Now that we are actually using the watch timers, enabling the interrupts
just makes sense.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_irq.c         | 8 ++++++++
 drivers/gpu/drm/i915/i915_reg.h         | 3 +++
 drivers/gpu/drm/i915/intel_ringbuffer.c | 4 ++--
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 566f61b..a376371 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -475,6 +475,12 @@ static void snb_gt_irq_handler(struct drm_device *dev,
 		i915_handle_error(dev, false);
 	}
 
+	if (gt_iir & (GT_GEN6_RENDER_TIMEOUT_COUNTER_EXPIRED))
+		DRM_ERROR("Render timeout expired\n");
+
+	if (gt_iir & (GT_GEN6_BSD_TIMEOUT_COUNTER_EXPIRED))
+		DRM_ERROR("BSD timeout expired\n");
+
 	if (gt_iir & GT_GEN7_L3_PARITY_ERROR_INTERRUPT)
 		ivybridge_handle_parity_error(dev);
 }
@@ -1816,6 +1822,8 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
 	if (IS_GEN6(dev))
 		render_irqs =
 			GT_USER_INTERRUPT |
+			GT_GEN6_RENDER_TIMEOUT_COUNTER_EXPIRED |
+			GT_GEN6_BSD_TIMEOUT_COUNTER_EXPIRED |
 			GEN6_BSD_USER_INTERRUPT |
 			GEN6_BLITTER_USER_INTERRUPT;
 	else
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 195154b..558ed9a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -699,6 +699,7 @@
 
 #define GEN6_BSD_HWSTAM			0x12098
 #define GEN6_BSD_IMR			0x120a8
+#define   GEN6_BSD_TIMEOUT_COUNTER_EXPIRED (1 << 18)
 #define   GEN6_BSD_USER_INTERRUPT	(1 << 12)
 
 #define GEN6_BSD_RNCID			0x12198
@@ -3346,8 +3347,10 @@
 #define GT_GEN6_BLT_FLUSHDW_NOTIFY_INTERRUPT	(1 << 26)
 #define GT_GEN6_BLT_CS_ERROR_INTERRUPT		(1 << 25)
 #define GT_GEN6_BLT_USER_INTERRUPT		(1 << 22)
+#define GT_GEN6_BSD_TIMEOUT_COUNTER_EXPIRED	(1 << 18)
 #define GT_GEN6_BSD_CS_ERROR_INTERRUPT		(1 << 15)
 #define GT_GEN6_BSD_USER_INTERRUPT		(1 << 12)
+#define GT_GEN6_RENDER_TIMEOUT_COUNTER_EXPIRED  (1 << 6)
 #define GT_BSD_USER_INTERRUPT			(1 << 5) /* ilk only */
 #define GT_GEN7_L3_PARITY_ERROR_INTERRUPT	(1 << 5)
 #define GT_PIPE_NOTIFY				(1 << 4)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index f61b4a0..82bd0cd 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1397,7 +1397,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 		ring->flush = gen6_render_ring_flush;
 		ring->irq_get = gen6_ring_get_irq;
 		ring->irq_put = gen6_ring_put_irq;
-		ring->irq_enable_mask = GT_USER_INTERRUPT;
+		ring->irq_enable_mask = GT_USER_INTERRUPT | GEN6_RENDER_TIMEOUT_COUNTER_EXPIRED;
 		ring->get_seqno = gen6_ring_get_seqno;
 		ring->sync_to = gen6_ring_sync;
 		ring->semaphore_register[0] = MI_SEMAPHORE_SYNC_INVALID;
@@ -1530,7 +1530,7 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
 		ring->flush = gen6_ring_flush;
 		ring->add_request = gen6_add_request;
 		ring->get_seqno = gen6_ring_get_seqno;
-		ring->irq_enable_mask = GEN6_BSD_USER_INTERRUPT;
+		ring->irq_enable_mask = GEN6_BSD_USER_INTERRUPT | GEN6_BSD_TIMEOUT_COUNTER_EXPIRED;
 		ring->irq_get = gen6_ring_get_irq;
 		ring->irq_put = gen6_ring_put_irq;
 		ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
-- 
1.7.11.2