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Commit be282fd4 authored by Jesse Barnes's avatar Jesse Barnes Committed by Chris Wilson
Browse files

drm/i915: add MMIO debug output 



Useful for capturing register read/write traces to send to the hw guys.

Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 6c9547ff

drivers/gpu/drm/i915/i915_drv.h

+28 −2
Original line number Original line Diff line number Diff line
@@ -264,6 +264,9 @@ typedef struct drm_i915_private { 
	int front_offset;

	int front_offset;

	int current_page;

	int current_page;

	int page_flipping;

	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;

	wait_queue_head_t irq_queue;

	atomic_t irq_received;

	atomic_t irq_received;
@@ -1100,8 +1103,26 @@ extern void intel_overlay_print_error_state(struct seq_file *m, struct intel_ove 
		LOCK_TEST_WITH_RETURN(dev, file_priv);			\

		LOCK_TEST_WITH_RETURN(dev, file_priv);			\

} while (0)

} while (0)





#define I915_READ(reg)          readl(dev_priv->regs + (reg))

static inline u32 i915_read(struct drm_i915_private *dev_priv, u32 reg)

#define I915_WRITE(reg, val)     writel(val, dev_priv->regs + (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_READ16(reg)	readw(dev_priv->regs + (reg))

#define I915_WRITE16(reg, val)	writel(val, dev_priv->regs + (reg))

#define I915_WRITE16(reg, val)	writel(val, dev_priv->regs + (reg))

#define I915_READ8(reg)		readb(dev_priv->regs + (reg))

#define I915_READ8(reg)		readb(dev_priv->regs + (reg))
@@ -1111,6 +1132,11 @@ extern void intel_overlay_print_error_state(struct seq_file *m, struct intel_ove 
#define POSTING_READ(reg)	(void)I915_READ(reg)

#define POSTING_READ(reg)	(void)I915_READ(reg)

#define POSTING_READ16(reg)	(void)I915_READ16(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 I915_VERBOSE 0





#define BEGIN_LP_RING(n)  do { \

#define BEGIN_LP_RING(n)  do { \