@@ -256,6 +256,9 @@ typedef struct drm_i915_private {
int front_offset;
int current_page;
int page_flipping;
+#define I915_DEBUG_READ (1<<0)
+#define I915_DEBUG_WRITE (1<<1)
+ unsigned long debug_flags;
wait_queue_head_t irq_queue;
atomic_t irq_received;
@@ -1065,8 +1068,26 @@ extern int intel_trans_dp_port_sel (struct drm_crtc *crtc);
LOCK_TEST_WITH_RETURN(dev, file_priv); \
} while (0)
-#define I915_READ(reg) readl(dev_priv->regs + (reg))
-#define I915_WRITE(reg, val) writel(val, dev_priv->regs + (reg))
+static inline u32 i915_read(struct drm_i915_private *dev_priv, u32 reg)
+{
+ u32 val;
+
+ val = readl(dev_priv->regs + reg);
+ if (dev_priv->debug_flags & I915_DEBUG_READ)
+ printk(KERN_ERR "read 0x%08x from 0x%08x\n", val, reg);
+ return val;
+}
+
+static inline void i915_write(struct drm_i915_private *dev_priv, u32 reg,
+ u32 val)
+{
+ writel(val, dev_priv->regs + reg);
+ if (dev_priv->debug_flags & I915_DEBUG_WRITE)
+ printk(KERN_ERR "wrote 0x%08x to 0x%08x\n", val, reg);
+}
+
+#define I915_READ(reg) i915_read(dev_priv, (reg))
+#define I915_WRITE(reg, val) i915_write(dev_priv, (reg), (val))
#define I915_READ16(reg) readw(dev_priv->regs + (reg))
#define I915_WRITE16(reg, val) writel(val, dev_priv->regs + (reg))
#define I915_READ8(reg) readb(dev_priv->regs + (reg))
@@ -1076,6 +1097,11 @@ extern int intel_trans_dp_port_sel (struct drm_crtc *crtc);
#define POSTING_READ(reg) (void)I915_READ(reg)
#define POSTING_READ16(reg) (void)I915_READ16(reg)
+#define I915_DEBUG_ENABLE_IO() (dev_priv->debug_flags |= I915_DEBUG_READ | \
+ I915_DEBUG_WRITE)
+#define I915_DEBUG_DISABLE_IO() (dev_priv->debug_flags &= ~(I915_DEBUG_READ | \
+ I915_DEBUG_WRITE))
+
#define I915_VERBOSE 0
#define BEGIN_LP_RING(n) do { \