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drm/i915: Introduce VECS: the 4th ring 

The video enhancement command streamer is a new ring on HSW which does
what it sounds like it does. This patch provides the most minimal
inception of the ring.

In order to support a new ring, we need to bump the number. The patch
may look trivial to the untrained eye, but bumping the number of rings
is a bit scary. As such the patch is not terribly useful by itself, but
a pretty nice place to find issues during a bisection.

Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-05-28 19:22:19 -07:00 committed by Daniel Vetter
parent ad776f8b09
commit 4a3dd19d94
2 changed files with 4 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_ringbuffer.c
View File

@ -915,6 +915,8 @@ void intel_ring_setup_status_page(struct intel_ring_buffer *ring)
case VCS: case VCS:
mmio = BSD_HWS_PGA_GEN7; mmio = BSD_HWS_PGA_GEN7;
break; break;
case VECS:
BUG();
} }
} else if (IS_GEN6(ring->dev)) { } else if (IS_GEN6(ring->dev)) {
mmio = RING_HWS_PGA_GEN6(ring->mmio_base); mmio = RING_HWS_PGA_GEN6(ring->mmio_base);

3
drivers/gpu/drm/i915/intel_ringbuffer.h
View File

@ -47,8 +47,9 @@ struct intel_ring_buffer {
RCS = 0x0, RCS = 0x0,
VCS, VCS,
BCS, BCS,
VECS,
} id; } id;
#define I915_NUM_RINGS 3 #define I915_NUM_RINGS 4
u32 mmio_base; u32 mmio_base;
void __iomem *virtual_start; void __iomem *virtual_start;
struct drm_device *dev; struct drm_device *dev;