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Commit ea16a3cd authored by Daniel Vetter's avatar Daniel Vetter
Browse files

drm/i915: add debugfs file for swizzling information 



This will also come handy for the gen6+ swizzling support, where the
driver is supposed to control swizzling depending upon dram
configuration.

v2: CxDRB3 are 16 bit regs! Noticed by Chris Wilson.

Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent c9c4b6f6

drivers/gpu/drm/i915/i915_debugfs.c

+50 −0
Original line number Diff line number Diff line
@@ -1379,6 +1379,55 @@ static int i915_gen6_forcewake_count_info(struct seq_file *m, void *data) 
	return 0;

}



static const char *swizzle_string(unsigned swizzle)

{

	switch(swizzle) {

	case I915_BIT_6_SWIZZLE_NONE:

		return "none";

	case I915_BIT_6_SWIZZLE_9:

		return "bit9";

	case I915_BIT_6_SWIZZLE_9_10:

		return "bit9/bit10";

	case I915_BIT_6_SWIZZLE_9_11:

		return "bit9/bit11";

	case I915_BIT_6_SWIZZLE_9_10_11:

		return "bit9/bit10/bit11";

	case I915_BIT_6_SWIZZLE_9_17:

		return "bit9/bit17";

	case I915_BIT_6_SWIZZLE_9_10_17:

		return "bit9/bit10/bit17";

	case I915_BIT_6_SWIZZLE_UNKNOWN:

		return "unkown";

	}



	return "bug";

}



static int i915_swizzle_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;

	struct drm_i915_private *dev_priv = dev->dev_private;



	mutex_lock(&dev->struct_mutex);

	seq_printf(m, "bit6 swizzle for X-tiling = %s\n",

		   swizzle_string(dev_priv->mm.bit_6_swizzle_x));

	seq_printf(m, "bit6 swizzle for Y-tiling = %s\n",

		   swizzle_string(dev_priv->mm.bit_6_swizzle_y));



	if (IS_GEN3(dev) || IS_GEN4(dev)) {

		seq_printf(m, "DDC = 0x%08x\n",

			   I915_READ(DCC));

		seq_printf(m, "C0DRB3 = 0x%04x\n",

			   I915_READ16(C0DRB3));

		seq_printf(m, "C1DRB3 = 0x%04x\n",

			   I915_READ16(C1DRB3));

	}

	mutex_unlock(&dev->struct_mutex);



	return 0;

}



static int

i915_debugfs_common_open(struct inode *inode,

			 struct file *filp)
@@ -1719,6 +1768,7 @@ static struct drm_info_list i915_debugfs_list[] = { 
	{"i915_gem_framebuffer", i915_gem_framebuffer_info, 0},

	{"i915_context_status", i915_context_status, 0},

	{"i915_gen6_forcewake_count", i915_gen6_forcewake_count_info, 0},

	{"i915_swizzle_info", i915_swizzle_info, 0},

};

#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)