[Intel-gfx] [PATCH 1/2] drm/i915: ringbuffer: use defined get_head/tail method

[Yuanhan Liu]

Use defined get_head/tail method to get the vaule of head/tail. Since each
ring buffer has it's own get_head/tail method defined, use it.

Signed-off-by: Yuanhan Liu <yuanhan.liu at intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c     |    5 +++--
 drivers/gpu/drm/i915/i915_dma.c         |    4 ++--
 drivers/gpu/drm/i915/i915_irq.c         |    2 +-
 drivers/gpu/drm/i915/intel_ringbuffer.c |    2 +-
 4 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 92d5605..068e3fa 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -339,10 +339,11 @@ static int i915_ringbuffer_info(struct seq_file *m, void *data)
 	struct drm_info_node *node = (struct drm_info_node *) m->private;
 	struct drm_device *dev = node->minor->dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct intel_ring_buffer *ring = &dev_priv->render_ring;
 	unsigned int head, tail;
 
-	head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-	tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
+	head = ring->get_head(dev, ring);
+	tail = ring->get_tail(dev, ring);
 
 	seq_printf(m, "RingHead :  %08x\n", head);
 	seq_printf(m, "RingTail :  %08x\n", tail);
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 44af317..c5d6021 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -107,8 +107,8 @@ void i915_kernel_lost_context(struct drm_device * dev)
 	if (drm_core_check_feature(dev, DRIVER_MODESET))
 		return;
 
-	ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-	ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
+	ring->head = ring->get_head(dev, ring);
+	ring->tail = ring->get_tail(dev, ring);
 	ring->space = ring->head - (ring->tail + 8);
 	if (ring->space < 0)
 		ring->space += ring->size;
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 16861b8..a2d130a 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -531,7 +531,7 @@ i915_ringbuffer_last_batch(struct drm_device *dev)
 	 * to find the most recently dispatched batch buffer.
 	 */
 	bbaddr = 0;
-	head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
+	head = dev_priv->render_ring.get_head(dev, &dev_priv->render_ring);
 	ring = (u32 *)(dev_priv->render_ring.virtual_start + head);
 
 	while (--ring >= (u32 *)dev_priv->render_ring.virtual_start) {
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 51e9c9e7..0140f80 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -190,7 +190,7 @@ static int init_ring_common(struct drm_device *dev,
 			((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES)
 			| RING_NO_REPORT | RING_VALID);
 
-	head = I915_READ(ring->regs.head) & HEAD_ADDR;
+	head = ring->get_head(dev, ring);
 	/* If the head is still not zero, the ring is dead */
 	if (head != 0) {
 		DRM_ERROR("%s initialization failed "
-- 
1.7.2.1