From: Xiang, Haihao Date: Thu, 16 Sep 2010 02:43:12 +0000 (+0800) Subject: drm/i915: add set_tail hook in struct intel_ring_buffer X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d46eefa29724b1be0e8e90a3a51a190b912ebfab;p=linux-beck.git drm/i915: add set_tail hook in struct intel_ring_buffer This is prepared for video codec ring buffer on Sandybridge. It is needed to read/write more than one register to move the tail pointer of the video codec ring on Sandybridge. Signed-off-by: Xiang, Haihao Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson --- diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 178e2cea9835..7debb1972eb2 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -132,6 +132,12 @@ static unsigned int render_ring_get_tail(struct drm_device *dev, return I915_READ(PRB0_TAIL) & TAIL_ADDR; } +static inline void render_ring_set_tail(struct drm_device *dev, u32 value) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + I915_WRITE(PRB0_TAIL, value); +} + static unsigned int render_ring_get_active_head(struct drm_device *dev, struct intel_ring_buffer *ring) { @@ -144,8 +150,7 @@ static unsigned int render_ring_get_active_head(struct drm_device *dev, static void render_ring_advance_ring(struct drm_device *dev, struct intel_ring_buffer *ring) { - drm_i915_private_t *dev_priv = dev->dev_private; - I915_WRITE(PRB0_TAIL, ring->tail); + render_ring_set_tail(dev, ring->tail); } static int init_ring_common(struct drm_device *dev, @@ -159,7 +164,7 @@ static int init_ring_common(struct drm_device *dev, /* Stop the ring if it's running. */ I915_WRITE(ring->regs.ctl, 0); I915_WRITE(ring->regs.head, 0); - I915_WRITE(ring->regs.tail, 0); + ring->set_tail(dev, 0); /* Initialize the ring. */ I915_WRITE(ring->regs.start, obj_priv->gtt_offset); @@ -400,6 +405,12 @@ static inline unsigned int bsd_ring_get_tail(struct drm_device *dev, return I915_READ(BSD_RING_TAIL) & TAIL_ADDR; } +static inline void bsd_ring_set_tail(struct drm_device *dev, u32 value) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + I915_WRITE(BSD_RING_TAIL, value); +} + static inline unsigned int bsd_ring_get_active_head(struct drm_device *dev, struct intel_ring_buffer *ring) { @@ -410,8 +421,7 @@ static inline unsigned int bsd_ring_get_active_head(struct drm_device *dev, static inline void bsd_ring_advance_ring(struct drm_device *dev, struct intel_ring_buffer *ring) { - drm_i915_private_t *dev_priv = dev->dev_private; - I915_WRITE(BSD_RING_TAIL, ring->tail); + bsd_ring_set_tail(dev, ring->tail); } static int init_bsd_ring(struct drm_device *dev, @@ -817,6 +827,7 @@ static struct intel_ring_buffer render_ring = { .init = init_render_ring, .get_head = render_ring_get_head, .get_tail = render_ring_get_tail, + .set_tail = render_ring_set_tail, .get_active_head = render_ring_get_active_head, .advance_ring = render_ring_advance_ring, .flush = render_ring_flush, @@ -855,6 +866,7 @@ static struct intel_ring_buffer bsd_ring = { .init = init_bsd_ring, .get_head = bsd_ring_get_head, .get_tail = bsd_ring_get_tail, + .set_tail = bsd_ring_set_tail, .get_active_head = bsd_ring_get_active_head, .advance_ring = bsd_ring_advance_ring, .flush = bsd_ring_flush, diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 5603d6e945e9..7bd571c796ae 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -48,6 +48,8 @@ struct intel_ring_buffer { struct intel_ring_buffer *ring); unsigned int (*get_tail)(struct drm_device *dev, struct intel_ring_buffer *ring); + void (*set_tail)(struct drm_device *dev, + u32 value); unsigned int (*get_active_head)(struct drm_device *dev, struct intel_ring_buffer *ring); void (*advance_ring)(struct drm_device *dev,