drivers/gpu/drm/radeon/radeon_cursor.c - arm/linux - Git at Google

 /*
  * Copyright 2007-8 Advanced Micro Devices, Inc.
  * Copyright 2008 Red Hat Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: Dave Airlie
  *          Alex Deucher
  */
 #include <drm/drmP.h>
 #include <drm/radeon_drm.h>
 #include "radeon.h"

 #define CURSOR_WIDTH 64
 #define CURSOR_HEIGHT 64

 static void radeon_lock_cursor(struct drm_crtc *crtc, bool lock)
 {
 	struct radeon_device *rdev = crtc->dev->dev_private;
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	uint32_t cur_lock;

 	if (ASIC_IS_DCE4(rdev)) {
 		cur_lock = RREG32(EVERGREEN_CUR_UPDATE + radeon_crtc->crtc_offset);
 		if (lock)
 			cur_lock |= EVERGREEN_CURSOR_UPDATE_LOCK;
 		else
 			cur_lock &= ~EVERGREEN_CURSOR_UPDATE_LOCK;
 		WREG32(EVERGREEN_CUR_UPDATE + radeon_crtc->crtc_offset, cur_lock);
 	} else if (ASIC_IS_AVIVO(rdev)) {
 		cur_lock = RREG32(AVIVO_D1CUR_UPDATE + radeon_crtc->crtc_offset);
 		if (lock)
 			cur_lock |= AVIVO_D1CURSOR_UPDATE_LOCK;
 		else
 			cur_lock &= ~AVIVO_D1CURSOR_UPDATE_LOCK;
 		WREG32(AVIVO_D1CUR_UPDATE + radeon_crtc->crtc_offset, cur_lock);
 	} else {
 		cur_lock = RREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset);
 		if (lock)
 			cur_lock |= RADEON_CUR_LOCK;
 		else
 			cur_lock &= ~RADEON_CUR_LOCK;
 		WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, cur_lock);
 	}
 }

 static void radeon_hide_cursor(struct drm_crtc *crtc)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;

 	if (ASIC_IS_DCE4(rdev)) {
 		WREG32_IDX(EVERGREEN_CUR_CONTROL + radeon_crtc->crtc_offset,
 			   EVERGREEN_CURSOR_MODE(EVERGREEN_CURSOR_24_8_PRE_MULT) |
 			   EVERGREEN_CURSOR_URGENT_CONTROL(EVERGREEN_CURSOR_URGENT_1_2));
 	} else if (ASIC_IS_AVIVO(rdev)) {
 		WREG32_IDX(AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset,
 			   (AVIVO_D1CURSOR_MODE_24BPP << AVIVO_D1CURSOR_MODE_SHIFT));
 	} else {
 		u32 reg;
 		switch (radeon_crtc->crtc_id) {
 		case 0:
 			reg = RADEON_CRTC_GEN_CNTL;
 			break;
 		case 1:
 			reg = RADEON_CRTC2_GEN_CNTL;
 			break;
 		default:
 			return;
 		}
 		WREG32_IDX(reg, RREG32_IDX(reg) & ~RADEON_CRTC_CUR_EN);
 	}
 }

 static void radeon_show_cursor(struct drm_crtc *crtc)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;

 	if (ASIC_IS_DCE4(rdev)) {
 		WREG32(RADEON_MM_INDEX, EVERGREEN_CUR_CONTROL + radeon_crtc->crtc_offset);
 		WREG32(RADEON_MM_DATA, EVERGREEN_CURSOR_EN |
 		       EVERGREEN_CURSOR_MODE(EVERGREEN_CURSOR_24_8_PRE_MULT) |
 		       EVERGREEN_CURSOR_URGENT_CONTROL(EVERGREEN_CURSOR_URGENT_1_2));
 	} else if (ASIC_IS_AVIVO(rdev)) {
 		WREG32(RADEON_MM_INDEX, AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset);
 		WREG32(RADEON_MM_DATA, AVIVO_D1CURSOR_EN |
 		       (AVIVO_D1CURSOR_MODE_24BPP << AVIVO_D1CURSOR_MODE_SHIFT));
 	} else {
 		switch (radeon_crtc->crtc_id) {
 		case 0:
 			WREG32(RADEON_MM_INDEX, RADEON_CRTC_GEN_CNTL);
 			break;
 		case 1:
 			WREG32(RADEON_MM_INDEX, RADEON_CRTC2_GEN_CNTL);
 			break;
 		default:
 			return;
 		}

 		WREG32_P(RADEON_MM_DATA, (RADEON_CRTC_CUR_EN |
 					  (RADEON_CRTC_CUR_MODE_24BPP << RADEON_CRTC_CUR_MODE_SHIFT)),
 			 ~(RADEON_CRTC_CUR_EN | RADEON_CRTC_CUR_MODE_MASK));
 	}
 }

 static void radeon_set_cursor(struct drm_crtc *crtc, struct drm_gem_object *obj,
 			      uint64_t gpu_addr)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;

 	if (ASIC_IS_DCE4(rdev)) {
 		WREG32(EVERGREEN_CUR_SURFACE_ADDRESS_HIGH + radeon_crtc->crtc_offset,
 		       upper_32_bits(gpu_addr));
 		WREG32(EVERGREEN_CUR_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
 		       gpu_addr & 0xffffffff);
 	} else if (ASIC_IS_AVIVO(rdev)) {
 		if (rdev->family >= CHIP_RV770) {
 			if (radeon_crtc->crtc_id)
 				WREG32(R700_D2CUR_SURFACE_ADDRESS_HIGH, upper_32_bits(gpu_addr));
 			else
 				WREG32(R700_D1CUR_SURFACE_ADDRESS_HIGH, upper_32_bits(gpu_addr));
 		}
 		WREG32(AVIVO_D1CUR_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
 		       gpu_addr & 0xffffffff);
 	} else {
 		radeon_crtc->legacy_cursor_offset = gpu_addr - radeon_crtc->legacy_display_base_addr;
 		/* offset is from DISP(2)_BASE_ADDRESS */
 		WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, radeon_crtc->legacy_cursor_offset);
 	}
 }

 int radeon_crtc_cursor_set(struct drm_crtc *crtc,
 			   struct drm_file *file_priv,
 			   uint32_t handle,
 			   uint32_t width,
 			   uint32_t height)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;
 	struct drm_gem_object *obj;
 	struct radeon_bo *robj;
 	uint64_t gpu_addr;
 	int ret;

 	if (!handle) {
 		/* turn off cursor */
 		radeon_hide_cursor(crtc);
 		obj = NULL;
 		goto unpin;
 	}

 	if ((width > CURSOR_WIDTH) || (height > CURSOR_HEIGHT)) {
 		DRM_ERROR("bad cursor width or height %d x %d\n", width, height);
 		return -EINVAL;
 	}

 	obj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
 	if (!obj) {
 		DRM_ERROR("Cannot find cursor object %x for crtc %d\n", handle, radeon_crtc->crtc_id);
 		return -ENOENT;
 	}

 	robj = gem_to_radeon_bo(obj);
 	ret = radeon_bo_reserve(robj, false);
 	if (unlikely(ret != 0))
 		goto fail;
 	/* Only 27 bit offset for legacy cursor */
 	ret = radeon_bo_pin_restricted(robj, RADEON_GEM_DOMAIN_VRAM,
 				       ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 				       &gpu_addr);
 	radeon_bo_unreserve(robj);
 	if (ret)
 		goto fail;

 	radeon_crtc->cursor_width = width;
 	radeon_crtc->cursor_height = height;

 	radeon_lock_cursor(crtc, true);
 	radeon_set_cursor(crtc, obj, gpu_addr);
 	radeon_show_cursor(crtc);
 	radeon_lock_cursor(crtc, false);

 unpin:
 	if (radeon_crtc->cursor_bo) {
 		robj = gem_to_radeon_bo(radeon_crtc->cursor_bo);
 		ret = radeon_bo_reserve(robj, false);
 		if (likely(ret == 0)) {
 			radeon_bo_unpin(robj);
 			radeon_bo_unreserve(robj);
 		}
 		drm_gem_object_unreference_unlocked(radeon_crtc->cursor_bo);
 	}

 	radeon_crtc->cursor_bo = obj;
 	return 0;
 fail:
 	drm_gem_object_unreference_unlocked(obj);

 	return ret;
 }

 int radeon_crtc_cursor_move(struct drm_crtc *crtc,
 			    int x, int y)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;
 	int xorigin = 0, yorigin = 0;
 	int w = radeon_crtc->cursor_width;

 	if (ASIC_IS_AVIVO(rdev)) {
 		/* avivo cursor are offset into the total surface */
 		x += crtc->x;
 		y += crtc->y;
 	}
 	DRM_DEBUG("x %d y %d c->x %d c->y %d\n", x, y, crtc->x, crtc->y);

 	if (x < 0) {
 		xorigin = min(-x, CURSOR_WIDTH - 1);
 		x = 0;
 	}
 	if (y < 0) {
 		yorigin = min(-y, CURSOR_HEIGHT - 1);
 		y = 0;
 	}

 	/* fixed on DCE6 and newer */
 	if (ASIC_IS_AVIVO(rdev) && !ASIC_IS_DCE6(rdev)) {
 		int i = 0;
 		struct drm_crtc *crtc_p;

 		/*
 		 * avivo cursor image can't end on 128 pixel boundary or
 		 * go past the end of the frame if both crtcs are enabled
 		 *
 		 * NOTE: It is safe to access crtc->enabled of other crtcs
 		 * without holding either the mode_config lock or the other
 		 * crtc's lock as long as write access to this flag _always_
 		 * grabs all locks.
 		 */
 		list_for_each_entry(crtc_p, &crtc->dev->mode_config.crtc_list, head) {
 			if (crtc_p->enabled)
 				i++;
 		}
 		if (i > 1) {
 			int cursor_end, frame_end;

 			cursor_end = x - xorigin + w;
 			frame_end = crtc->x + crtc->mode.crtc_hdisplay;
 			if (cursor_end >= frame_end) {
 				w = w - (cursor_end - frame_end);
 				if (!(frame_end & 0x7f))
 					w--;
 			} else {
 				if (!(cursor_end & 0x7f))
 					w--;
 			}
 			if (w <= 0) {
 				w = 1;
 				cursor_end = x - xorigin + w;
 				if (!(cursor_end & 0x7f)) {
 					x--;
 					WARN_ON_ONCE(x < 0);
 				}
 			}
 		}
 	}

 	radeon_lock_cursor(crtc, true);
 	if (ASIC_IS_DCE4(rdev)) {
 		WREG32(EVERGREEN_CUR_POSITION + radeon_crtc->crtc_offset, (x << 16) | y);
 		WREG32(EVERGREEN_CUR_HOT_SPOT + radeon_crtc->crtc_offset, (xorigin << 16) | yorigin);
 		WREG32(EVERGREEN_CUR_SIZE + radeon_crtc->crtc_offset,
 		       ((w - 1) << 16) | (radeon_crtc->cursor_height - 1));
 	} else if (ASIC_IS_AVIVO(rdev)) {
 		WREG32(AVIVO_D1CUR_POSITION + radeon_crtc->crtc_offset, (x << 16) | y);
 		WREG32(AVIVO_D1CUR_HOT_SPOT + radeon_crtc->crtc_offset, (xorigin << 16) | yorigin);
 		WREG32(AVIVO_D1CUR_SIZE + radeon_crtc->crtc_offset,
 		       ((w - 1) << 16) | (radeon_crtc->cursor_height - 1));
 	} else {
 		if (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)
 			y *= 2;

 		WREG32(RADEON_CUR_HORZ_VERT_OFF + radeon_crtc->crtc_offset,
 		       (RADEON_CUR_LOCK
 			| (xorigin << 16)
 			| yorigin));
 		WREG32(RADEON_CUR_HORZ_VERT_POSN + radeon_crtc->crtc_offset,
 		       (RADEON_CUR_LOCK
 			| (x << 16)
 			| y));
 		/* offset is from DISP(2)_BASE_ADDRESS */
 		WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, (radeon_crtc->legacy_cursor_offset +
 								      (yorigin * 256)));
 	}
 	radeon_lock_cursor(crtc, false);

 	return 0;
 }
	/*
	* Copyright 2007-8 Advanced Micro Devices, Inc.
	* Copyright 2008 Red Hat Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	* Authors: Dave Airlie
	* Alex Deucher
	*/
	#include <drm/drmP.h>
	#include <drm/radeon_drm.h>
	#include "radeon.h"

	#define CURSOR_WIDTH 64
	#define CURSOR_HEIGHT 64

	static void radeon_lock_cursor(struct drm_crtc *crtc, bool lock)
	{
	struct radeon_device *rdev = crtc->dev->dev_private;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	uint32_t cur_lock;

	if (ASIC_IS_DCE4(rdev)) {
	cur_lock = RREG32(EVERGREEN_CUR_UPDATE + radeon_crtc->crtc_offset);
	if (lock)
	cur_lock \|= EVERGREEN_CURSOR_UPDATE_LOCK;
	else
	cur_lock &= ~EVERGREEN_CURSOR_UPDATE_LOCK;
	WREG32(EVERGREEN_CUR_UPDATE + radeon_crtc->crtc_offset, cur_lock);
	} else if (ASIC_IS_AVIVO(rdev)) {
	cur_lock = RREG32(AVIVO_D1CUR_UPDATE + radeon_crtc->crtc_offset);
	if (lock)
	cur_lock \|= AVIVO_D1CURSOR_UPDATE_LOCK;
	else
	cur_lock &= ~AVIVO_D1CURSOR_UPDATE_LOCK;
	WREG32(AVIVO_D1CUR_UPDATE + radeon_crtc->crtc_offset, cur_lock);
	} else {
	cur_lock = RREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset);
	if (lock)
	cur_lock \|= RADEON_CUR_LOCK;
	else
	cur_lock &= ~RADEON_CUR_LOCK;
	WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, cur_lock);
	}
	}

	static void radeon_hide_cursor(struct drm_crtc *crtc)
	{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct radeon_device *rdev = crtc->dev->dev_private;

	if (ASIC_IS_DCE4(rdev)) {
	WREG32_IDX(EVERGREEN_CUR_CONTROL + radeon_crtc->crtc_offset,
	EVERGREEN_CURSOR_MODE(EVERGREEN_CURSOR_24_8_PRE_MULT) \|
	EVERGREEN_CURSOR_URGENT_CONTROL(EVERGREEN_CURSOR_URGENT_1_2));
	} else if (ASIC_IS_AVIVO(rdev)) {
	WREG32_IDX(AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset,
	(AVIVO_D1CURSOR_MODE_24BPP << AVIVO_D1CURSOR_MODE_SHIFT));
	} else {
	u32 reg;
	switch (radeon_crtc->crtc_id) {
	case 0:
	reg = RADEON_CRTC_GEN_CNTL;
	break;
	case 1:
	reg = RADEON_CRTC2_GEN_CNTL;
	break;
	default:
	return;
	}
	WREG32_IDX(reg, RREG32_IDX(reg) & ~RADEON_CRTC_CUR_EN);
	}
	}

	static void radeon_show_cursor(struct drm_crtc *crtc)
	{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct radeon_device *rdev = crtc->dev->dev_private;

	if (ASIC_IS_DCE4(rdev)) {
	WREG32(RADEON_MM_INDEX, EVERGREEN_CUR_CONTROL + radeon_crtc->crtc_offset);
	WREG32(RADEON_MM_DATA, EVERGREEN_CURSOR_EN \|
	EVERGREEN_CURSOR_MODE(EVERGREEN_CURSOR_24_8_PRE_MULT) \|
	EVERGREEN_CURSOR_URGENT_CONTROL(EVERGREEN_CURSOR_URGENT_1_2));
	} else if (ASIC_IS_AVIVO(rdev)) {
	WREG32(RADEON_MM_INDEX, AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset);
	WREG32(RADEON_MM_DATA, AVIVO_D1CURSOR_EN \|
	(AVIVO_D1CURSOR_MODE_24BPP << AVIVO_D1CURSOR_MODE_SHIFT));
	} else {
	switch (radeon_crtc->crtc_id) {
	case 0:
	WREG32(RADEON_MM_INDEX, RADEON_CRTC_GEN_CNTL);
	break;
	case 1:
	WREG32(RADEON_MM_INDEX, RADEON_CRTC2_GEN_CNTL);
	break;
	default:
	return;
	}

	WREG32_P(RADEON_MM_DATA, (RADEON_CRTC_CUR_EN \|
	(RADEON_CRTC_CUR_MODE_24BPP << RADEON_CRTC_CUR_MODE_SHIFT)),
	~(RADEON_CRTC_CUR_EN \| RADEON_CRTC_CUR_MODE_MASK));
	}
	}

	static void radeon_set_cursor(struct drm_crtc crtc, struct drm_gem_object obj,
	uint64_t gpu_addr)
	{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct radeon_device *rdev = crtc->dev->dev_private;

	if (ASIC_IS_DCE4(rdev)) {
	WREG32(EVERGREEN_CUR_SURFACE_ADDRESS_HIGH + radeon_crtc->crtc_offset,
	upper_32_bits(gpu_addr));
	WREG32(EVERGREEN_CUR_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
	gpu_addr & 0xffffffff);
	} else if (ASIC_IS_AVIVO(rdev)) {
	if (rdev->family >= CHIP_RV770) {
	if (radeon_crtc->crtc_id)
	WREG32(R700_D2CUR_SURFACE_ADDRESS_HIGH, upper_32_bits(gpu_addr));
	else
	WREG32(R700_D1CUR_SURFACE_ADDRESS_HIGH, upper_32_bits(gpu_addr));
	}
	WREG32(AVIVO_D1CUR_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
	gpu_addr & 0xffffffff);
	} else {
	radeon_crtc->legacy_cursor_offset = gpu_addr - radeon_crtc->legacy_display_base_addr;
	/* offset is from DISP(2)_BASE_ADDRESS */
	WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, radeon_crtc->legacy_cursor_offset);
	}
	}

	int radeon_crtc_cursor_set(struct drm_crtc *crtc,
	struct drm_file *file_priv,
	uint32_t handle,
	uint32_t width,
	uint32_t height)
	{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct radeon_device *rdev = crtc->dev->dev_private;
	struct drm_gem_object *obj;
	struct radeon_bo *robj;
	uint64_t gpu_addr;
	int ret;

	if (!handle) {
	/* turn off cursor */
	radeon_hide_cursor(crtc);
	obj = NULL;
	goto unpin;
	}

	if ((width > CURSOR_WIDTH) \|\| (height > CURSOR_HEIGHT)) {
	DRM_ERROR("bad cursor width or height %d x %d\n", width, height);
	return -EINVAL;
	}

	obj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
	if (!obj) {
	DRM_ERROR("Cannot find cursor object %x for crtc %d\n", handle, radeon_crtc->crtc_id);
	return -ENOENT;
	}

	robj = gem_to_radeon_bo(obj);
	ret = radeon_bo_reserve(robj, false);
	if (unlikely(ret != 0))
	goto fail;
	/* Only 27 bit offset for legacy cursor */
	ret = radeon_bo_pin_restricted(robj, RADEON_GEM_DOMAIN_VRAM,
	ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
	&gpu_addr);
	radeon_bo_unreserve(robj);
	if (ret)
	goto fail;

	radeon_crtc->cursor_width = width;
	radeon_crtc->cursor_height = height;

	radeon_lock_cursor(crtc, true);
	radeon_set_cursor(crtc, obj, gpu_addr);
	radeon_show_cursor(crtc);
	radeon_lock_cursor(crtc, false);

	unpin:
	if (radeon_crtc->cursor_bo) {
	robj = gem_to_radeon_bo(radeon_crtc->cursor_bo);
	ret = radeon_bo_reserve(robj, false);
	if (likely(ret == 0)) {
	radeon_bo_unpin(robj);
	radeon_bo_unreserve(robj);
	}
	drm_gem_object_unreference_unlocked(radeon_crtc->cursor_bo);
	}

	radeon_crtc->cursor_bo = obj;
	return 0;
	fail:
	drm_gem_object_unreference_unlocked(obj);

	return ret;
	}

	int radeon_crtc_cursor_move(struct drm_crtc *crtc,
	int x, int y)
	{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct radeon_device *rdev = crtc->dev->dev_private;
	int xorigin = 0, yorigin = 0;
	int w = radeon_crtc->cursor_width;

	if (ASIC_IS_AVIVO(rdev)) {
	/* avivo cursor are offset into the total surface */
	x += crtc->x;
	y += crtc->y;
	}
	DRM_DEBUG("x %d y %d c->x %d c->y %d\n", x, y, crtc->x, crtc->y);

	if (x < 0) {
	xorigin = min(-x, CURSOR_WIDTH - 1);
	x = 0;
	}
	if (y < 0) {
	yorigin = min(-y, CURSOR_HEIGHT - 1);
	y = 0;
	}

	/* fixed on DCE6 and newer */
	if (ASIC_IS_AVIVO(rdev) && !ASIC_IS_DCE6(rdev)) {
	int i = 0;
	struct drm_crtc *crtc_p;

	/*
	* avivo cursor image can't end on 128 pixel boundary or
	* go past the end of the frame if both crtcs are enabled
	*
	* NOTE: It is safe to access crtc->enabled of other crtcs
	* without holding either the mode_config lock or the other
	* crtc's lock as long as write access to this flag _always_
	* grabs all locks.
	*/
	list_for_each_entry(crtc_p, &crtc->dev->mode_config.crtc_list, head) {
	if (crtc_p->enabled)
	i++;
	}
	if (i > 1) {
	int cursor_end, frame_end;

	cursor_end = x - xorigin + w;
	frame_end = crtc->x + crtc->mode.crtc_hdisplay;
	if (cursor_end >= frame_end) {
	w = w - (cursor_end - frame_end);
	if (!(frame_end & 0x7f))
	w--;
	} else {
	if (!(cursor_end & 0x7f))
	w--;
	}
	if (w <= 0) {
	w = 1;
	cursor_end = x - xorigin + w;
	if (!(cursor_end & 0x7f)) {
	x--;
	WARN_ON_ONCE(x < 0);
	}
	}
	}
	}

	radeon_lock_cursor(crtc, true);
	if (ASIC_IS_DCE4(rdev)) {
	WREG32(EVERGREEN_CUR_POSITION + radeon_crtc->crtc_offset, (x << 16) \| y);
	WREG32(EVERGREEN_CUR_HOT_SPOT + radeon_crtc->crtc_offset, (xorigin << 16) \| yorigin);
	WREG32(EVERGREEN_CUR_SIZE + radeon_crtc->crtc_offset,
	((w - 1) << 16) \| (radeon_crtc->cursor_height - 1));
	} else if (ASIC_IS_AVIVO(rdev)) {
	WREG32(AVIVO_D1CUR_POSITION + radeon_crtc->crtc_offset, (x << 16) \| y);
	WREG32(AVIVO_D1CUR_HOT_SPOT + radeon_crtc->crtc_offset, (xorigin << 16) \| yorigin);
	WREG32(AVIVO_D1CUR_SIZE + radeon_crtc->crtc_offset,
	((w - 1) << 16) \| (radeon_crtc->cursor_height - 1));
	} else {
	if (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)
	y *= 2;

	WREG32(RADEON_CUR_HORZ_VERT_OFF + radeon_crtc->crtc_offset,
	(RADEON_CUR_LOCK
	\| (xorigin << 16)
	\| yorigin));
	WREG32(RADEON_CUR_HORZ_VERT_POSN + radeon_crtc->crtc_offset,
	(RADEON_CUR_LOCK
	\| (x << 16)
	\| y));
	/* offset is from DISP(2)_BASE_ADDRESS */
	WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, (radeon_crtc->legacy_cursor_offset +
	(yorigin * 256)));
	}
	radeon_lock_cursor(crtc, false);

	return 0;
	}