drm/radeon: improve ring debugfs a bit

	struct radeon_device *rdev = dev->dev_private;

	int ridx = *(int*)node->info_ent->data;

	struct radeon_ring *ring = &rdev->ring[ridx];

	uint32_t rptr, wptr, rptr_next;

	unsigned count, i, j;

	u32 tmp;

	radeon_ring_free_size(rdev, ring);

	count = (ring->ring_size / 4) - ring->ring_free_dw;

	tmp = radeon_ring_get_wptr(rdev, ring);

	seq_printf(m, "wptr(0x%04x): 0x%08x [%5d]\n", ring->wptr_reg, tmp, tmp);

	tmp = radeon_ring_get_rptr(rdev, ring);

	seq_printf(m, "rptr(0x%04x): 0x%08x [%5d]\n", ring->rptr_reg, tmp, tmp);

	wptr = radeon_ring_get_wptr(rdev, ring);

	seq_printf(m, "wptr(0x%04x): 0x%08x [%5d]\n",

		   ring->wptr_reg, wptr, wptr);

	rptr = radeon_ring_get_rptr(rdev, ring);

	seq_printf(m, "rptr(0x%04x): 0x%08x [%5d]\n",

		   ring->rptr_reg, rptr, rptr);

	if (ring->rptr_save_reg) {

		seq_printf(m, "rptr next(0x%04x): 0x%08x\n", ring->rptr_save_reg,

			   RREG32(ring->rptr_save_reg));

	}

	seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n", ring->wptr, ring->wptr);

	seq_printf(m, "driver's copy of the rptr: 0x%08x [%5d]\n", ring->rptr, ring->rptr);

	seq_printf(m, "last semaphore signal addr : 0x%016llx\n", ring->last_semaphore_signal_addr);

	seq_printf(m, "last semaphore wait addr   : 0x%016llx\n", ring->last_semaphore_wait_addr);

		rptr_next = RREG32(ring->rptr_save_reg);

		seq_printf(m, "rptr next(0x%04x): 0x%08x [%5d]\n",

			   ring->rptr_save_reg, rptr_next, rptr_next);

	} else

		rptr_next = ~0;

	seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n",

		   ring->wptr, ring->wptr);

	seq_printf(m, "driver's copy of the rptr: 0x%08x [%5d]\n",

		   ring->rptr, ring->rptr);

	seq_printf(m, "last semaphore signal addr : 0x%016llx\n",

		   ring->last_semaphore_signal_addr);

	seq_printf(m, "last semaphore wait addr   : 0x%016llx\n",

		   ring->last_semaphore_wait_addr);

	seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw);

	seq_printf(m, "%u dwords in ring\n", count);

	if (!ring->ready)

		return 0;

	/* print 8 dw before current rptr as often it's the last executed

	 * packet that is the root issue

	 */

	i = (ring->rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask;

	if (ring->ready) {

	i = (rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask;

	for (j = 0; j <= (count + 32); j++) {

			seq_printf(m, "r[%5d]=0x%08x\n", i, ring->ring[i]);

		seq_printf(m, "r[%5d]=0x%08x", i, ring->ring[i]);

		if (rptr == i)

			seq_puts(m, " *");

		if (rptr_next == i)

			seq_puts(m, " #");

		seq_puts(m, "\n");

		i = (i + 1) & ring->ptr_mask;

	}

	}

	return 0;

}