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Commit 9e3a6d15 authored by Ben Gamari's avatar Ben Gamari Committed by Eric Anholt
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drm/i915: Add i915 register dumping debugfs file 



Add a debugfs file to dump the entire register range. Here we
assume that reading write-only/reserved registers won't make the chip
angry. Seems to hold true, thankfully.

Signed-off-by: default avatarBen Gamari <bgamari.foss@gmail.com>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 27c202ad

drivers/gpu/drm/i915/i915_debugfs.c

+30 −0
Original line number Diff line number Diff line
@@ -363,7 +363,37 @@ out: 
	return 0;

}



static int i915_registers_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;

	uint32_t reg;



#define DUMP_RANGE(start, end) \

	for (reg=start; reg < end; reg += 4) \

	seq_printf(m, "%08x\t%08x\n", reg, I915_READ(reg));



	DUMP_RANGE(0x00000, 0x00fff);   /* VGA registers */

	DUMP_RANGE(0x02000, 0x02fff);   /* instruction, memory, interrupt control registers */

	DUMP_RANGE(0x03000, 0x031ff);   /* FENCE and PPGTT control registers */

	DUMP_RANGE(0x03200, 0x03fff);   /* frame buffer compression registers */

	DUMP_RANGE(0x05000, 0x05fff);   /* I/O control registers */

	DUMP_RANGE(0x06000, 0x06fff);   /* clock control registers */

	DUMP_RANGE(0x07000, 0x07fff);   /* 3D internal debug registers */

	DUMP_RANGE(0x07400, 0x088ff);   /* GPE debug registers */

	DUMP_RANGE(0x0a000, 0x0afff);   /* display palette registers */

	DUMP_RANGE(0x10000, 0x13fff);   /* MMIO MCHBAR */

	DUMP_RANGE(0x30000, 0x3ffff);   /* overlay registers */

	DUMP_RANGE(0x60000, 0x6ffff);   /* display engine pipeline registers */

	DUMP_RANGE(0x70000, 0x72fff);   /* display and cursor registers */

	DUMP_RANGE(0x73000, 0x73fff);   /* performance counters */



	return 0;

}





static struct drm_info_list i915_debugfs_list[] = {

	{"i915_regs", i915_registers_info, 0},

	{"i915_gem_active", i915_gem_object_list_info, 0, (void *) ACTIVE_LIST},

	{"i915_gem_flushing", i915_gem_object_list_info, 0, (void *) FLUSHING_LIST},

	{"i915_gem_inactive", i915_gem_object_list_info, 0, (void *) INACTIVE_LIST},