drivers/gpu/drm/sti/sti_cursor.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright (C) STMicroelectronics SA 2014
  * Authors: Vincent Abriou <vincent.abriou@st.com>
  *          Fabien Dessenne <fabien.dessenne@st.com>
  *          for STMicroelectronics.
  * License terms:  GNU General Public License (GPL), version 2
  */

 #include <linux/seq_file.h>

 #include <drm/drm_atomic.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_cma_helper.h>

 #include "sti_compositor.h"
 #include "sti_cursor.h"
 #include "sti_plane.h"
 #include "sti_vtg.h"

 /* Registers */
 #define CUR_CTL             0x00
 #define CUR_VPO             0x0C
 #define CUR_PML             0x14
 #define CUR_PMP             0x18
 #define CUR_SIZE            0x1C
 #define CUR_CML             0x20
 #define CUR_AWS             0x28
 #define CUR_AWE             0x2C

 #define CUR_CTL_CLUT_UPDATE BIT(1)

 #define STI_CURS_MIN_SIZE   1
 #define STI_CURS_MAX_SIZE   128

 /*
  * pixmap dma buffer stucture
  *
  * @paddr:  physical address
  * @size:   buffer size
  * @base:   virtual address
  */
 struct dma_pixmap {
 	dma_addr_t paddr;
 	size_t size;
 	void *base;
 };

 /**
  * STI Cursor structure
  *
  * @sti_plane:    sti_plane structure
  * @dev:          driver device
  * @regs:         cursor registers
  * @width:        cursor width
  * @height:       cursor height
  * @clut:         color look up table
  * @clut_paddr:   color look up table physical address
  * @pixmap:       pixmap dma buffer (clut8-format cursor)
  */
 struct sti_cursor {
 	struct sti_plane plane;
 	struct device *dev;
 	void __iomem *regs;
 	unsigned int width;
 	unsigned int height;
 	unsigned short *clut;
 	dma_addr_t clut_paddr;
 	struct dma_pixmap pixmap;
 };

 static const uint32_t cursor_supported_formats[] = {
 	DRM_FORMAT_ARGB8888,
 };

 #define to_sti_cursor(x) container_of(x, struct sti_cursor, plane)

 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
 				   readl(cursor->regs + reg))

 static void cursor_dbg_vpo(struct seq_file *s, u32 val)
 {
 	seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);
 }

 static void cursor_dbg_size(struct seq_file *s, u32 val)
 {
 	seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF);
 }

 static void cursor_dbg_pml(struct seq_file *s,
 			   struct sti_cursor *cursor, u32 val)
 {
 	if (cursor->pixmap.paddr == val)
 		seq_printf(s, "\tVirt @: %p", cursor->pixmap.base);
 }

 static void cursor_dbg_cml(struct seq_file *s,
 			   struct sti_cursor *cursor, u32 val)
 {
 	if (cursor->clut_paddr == val)
 		seq_printf(s, "\tVirt @: %p", cursor->clut);
 }

 static int cursor_dbg_show(struct seq_file *s, void *data)
 {
 	struct drm_info_node *node = s->private;
 	struct sti_cursor *cursor = (struct sti_cursor *)node->info_ent->data;

 	seq_printf(s, "%s: (vaddr = 0x%p)",
 		   sti_plane_to_str(&cursor->plane), cursor->regs);

 	DBGFS_DUMP(CUR_CTL);
 	DBGFS_DUMP(CUR_VPO);
 	cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO));
 	DBGFS_DUMP(CUR_PML);
 	cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML));
 	DBGFS_DUMP(CUR_PMP);
 	DBGFS_DUMP(CUR_SIZE);
 	cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE));
 	DBGFS_DUMP(CUR_CML);
 	cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML));
 	DBGFS_DUMP(CUR_AWS);
 	DBGFS_DUMP(CUR_AWE);
 	seq_puts(s, "\n");

 	return 0;
 }

 static struct drm_info_list cursor_debugfs_files[] = {
 	{ "cursor", cursor_dbg_show, 0, NULL },
 };

 static int cursor_debugfs_init(struct sti_cursor *cursor,
 			       struct drm_minor *minor)
 {
 	unsigned int i;

 	for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++)
 		cursor_debugfs_files[i].data = cursor;

 	return drm_debugfs_create_files(cursor_debugfs_files,
 					ARRAY_SIZE(cursor_debugfs_files),
 					minor->debugfs_root, minor);
 }

 static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src)
 {
 	u8  *dst = cursor->pixmap.base;
 	unsigned int i, j;
 	u32 a, r, g, b;

 	for (i = 0; i < cursor->height; i++) {
 		for (j = 0; j < cursor->width; j++) {
 			/* Pick the 2 higher bits of each component */
 			a = (*src >> 30) & 3;
 			r = (*src >> 22) & 3;
 			g = (*src >> 14) & 3;
 			b = (*src >> 6) & 3;
 			*dst = a << 6 | r << 4 | g << 2 | b;
 			src++;
 			dst++;
 		}
 	}
 }

 static void sti_cursor_init(struct sti_cursor *cursor)
 {
 	unsigned short *base = cursor->clut;
 	unsigned int a, r, g, b;

 	/* Assign CLUT values, ARGB444 format */
 	for (a = 0; a < 4; a++)
 		for (r = 0; r < 4; r++)
 			for (g = 0; g < 4; g++)
 				for (b = 0; b < 4; b++)
 					*base++ = (a * 5) << 12 |
 						  (r * 5) << 8 |
 						  (g * 5) << 4 |
 						  (b * 5);
 }

 static int sti_cursor_atomic_check(struct drm_plane *drm_plane,
 				   struct drm_plane_state *state)
 {
 	struct sti_plane *plane = to_sti_plane(drm_plane);
 	struct sti_cursor *cursor = to_sti_cursor(plane);
 	struct drm_crtc *crtc = state->crtc;
 	struct drm_framebuffer *fb = state->fb;
 	struct drm_crtc_state *crtc_state;
 	struct drm_display_mode *mode;
 	int dst_x, dst_y, dst_w, dst_h;
 	int src_w, src_h;

 	/* no need for further checks if the plane is being disabled */
 	if (!crtc || !fb)
 		return 0;

 	crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
 	mode = &crtc_state->mode;
 	dst_x = state->crtc_x;
 	dst_y = state->crtc_y;
 	dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
 	dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
 	/* src_x are in 16.16 format */
 	src_w = state->src_w >> 16;
 	src_h = state->src_h >> 16;

 	if (src_w < STI_CURS_MIN_SIZE ||
 	    src_h < STI_CURS_MIN_SIZE ||
 	    src_w > STI_CURS_MAX_SIZE ||
 	    src_h > STI_CURS_MAX_SIZE) {
 		DRM_ERROR("Invalid cursor size (%dx%d)\n",
 				src_w, src_h);
 		return -EINVAL;
 	}

 	/* If the cursor size has changed, re-allocated the pixmap */
 	if (!cursor->pixmap.base ||
 	    (cursor->width != src_w) ||
 	    (cursor->height != src_h)) {
 		cursor->width = src_w;
 		cursor->height = src_h;

 		if (cursor->pixmap.base)
 			dma_free_wc(cursor->dev, cursor->pixmap.size,
 				    cursor->pixmap.base, cursor->pixmap.paddr);

 		cursor->pixmap.size = cursor->width * cursor->height;

 		cursor->pixmap.base = dma_alloc_wc(cursor->dev,
 						   cursor->pixmap.size,
 						   &cursor->pixmap.paddr,
 						   GFP_KERNEL | GFP_DMA);
 		if (!cursor->pixmap.base) {
 			DRM_ERROR("Failed to allocate memory for pixmap\n");
 			return -EINVAL;
 		}
 	}

 	if (!drm_fb_cma_get_gem_obj(fb, 0)) {
 		DRM_ERROR("Can't get CMA GEM object for fb\n");
 		return -EINVAL;
 	}

 	DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
 		      crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)),
 		      drm_plane->base.id, sti_plane_to_str(plane));
 	DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y);

 	return 0;
 }

 static void sti_cursor_atomic_update(struct drm_plane *drm_plane,
 				     struct drm_plane_state *oldstate)
 {
 	struct drm_plane_state *state = drm_plane->state;
 	struct sti_plane *plane = to_sti_plane(drm_plane);
 	struct sti_cursor *cursor = to_sti_cursor(plane);
 	struct drm_crtc *crtc = state->crtc;
 	struct drm_framebuffer *fb = state->fb;
 	struct drm_display_mode *mode;
 	int dst_x, dst_y;
 	struct drm_gem_cma_object *cma_obj;
 	u32 y, x;
 	u32 val;

 	if (!crtc || !fb)
 		return;

 	mode = &crtc->mode;
 	dst_x = state->crtc_x;
 	dst_y = state->crtc_y;

 	cma_obj = drm_fb_cma_get_gem_obj(fb, 0);

 	/* Convert ARGB8888 to CLUT8 */
 	sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr);

 	/* AWS and AWE depend on the mode */
 	y = sti_vtg_get_line_number(*mode, 0);
 	x = sti_vtg_get_pixel_number(*mode, 0);
 	val = y << 16 | x;
 	writel(val, cursor->regs + CUR_AWS);
 	y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
 	x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
 	val = y << 16 | x;
 	writel(val, cursor->regs + CUR_AWE);

 	/* Set memory location, size, and position */
 	writel(cursor->pixmap.paddr, cursor->regs + CUR_PML);
 	writel(cursor->width, cursor->regs + CUR_PMP);
 	writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE);

 	y = sti_vtg_get_line_number(*mode, dst_y);
 	x = sti_vtg_get_pixel_number(*mode, dst_x);
 	writel((y << 16) | x, cursor->regs + CUR_VPO);

 	/* Set and fetch CLUT */
 	writel(cursor->clut_paddr, cursor->regs + CUR_CML);
 	writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL);

 	sti_plane_update_fps(plane, true, false);

 	plane->status = STI_PLANE_UPDATED;
 }

 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane,
 				      struct drm_plane_state *oldstate)
 {
 	struct sti_plane *plane = to_sti_plane(drm_plane);

 	if (!drm_plane->crtc) {
 		DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
 				 drm_plane->base.id);
 		return;
 	}

 	DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
 			 drm_plane->crtc->base.id,
 			 sti_mixer_to_str(to_sti_mixer(drm_plane->crtc)),
 			 drm_plane->base.id, sti_plane_to_str(plane));

 	plane->status = STI_PLANE_DISABLING;
 }

 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
 	.atomic_check = sti_cursor_atomic_check,
 	.atomic_update = sti_cursor_atomic_update,
 	.atomic_disable = sti_cursor_atomic_disable,
 };

 static void sti_cursor_destroy(struct drm_plane *drm_plane)
 {
 	DRM_DEBUG_DRIVER("\n");

 	drm_plane_helper_disable(drm_plane);
 	drm_plane_cleanup(drm_plane);
 }

 static int sti_cursor_late_register(struct drm_plane *drm_plane)
 {
 	struct sti_plane *plane = to_sti_plane(drm_plane);
 	struct sti_cursor *cursor = to_sti_cursor(plane);

 	return cursor_debugfs_init(cursor, drm_plane->dev->primary);
 }

 struct drm_plane_funcs sti_cursor_plane_helpers_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
 	.destroy = sti_cursor_destroy,
 	.set_property = drm_atomic_helper_plane_set_property,
 	.reset = sti_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 	.late_register = sti_cursor_late_register,
 };

 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev,
 				    struct device *dev, int desc,
 				    void __iomem *baseaddr,
 				    unsigned int possible_crtcs)
 {
 	struct sti_cursor *cursor;
 	size_t size;
 	int res;

 	cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL);
 	if (!cursor) {
 		DRM_ERROR("Failed to allocate memory for cursor\n");
 		return NULL;
 	}

 	/* Allocate clut buffer */
 	size = 0x100 * sizeof(unsigned short);
 	cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr,
 				    GFP_KERNEL | GFP_DMA);

 	if (!cursor->clut) {
 		DRM_ERROR("Failed to allocate memory for cursor clut\n");
 		goto err_clut;
 	}

 	cursor->dev = dev;
 	cursor->regs = baseaddr;
 	cursor->plane.desc = desc;
 	cursor->plane.status = STI_PLANE_DISABLED;

 	sti_cursor_init(cursor);

 	res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane,
 				       possible_crtcs,
 				       &sti_cursor_plane_helpers_funcs,
 				       cursor_supported_formats,
 				       ARRAY_SIZE(cursor_supported_formats),
 				       DRM_PLANE_TYPE_CURSOR, NULL);
 	if (res) {
 		DRM_ERROR("Failed to initialize universal plane\n");
 		goto err_plane;
 	}

 	drm_plane_helper_add(&cursor->plane.drm_plane,
 			     &sti_cursor_helpers_funcs);

 	sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR);

 	return &cursor->plane.drm_plane;

 err_plane:
 	dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr);
 err_clut:
 	devm_kfree(dev, cursor);
 	return NULL;
 }
	/*
	* Copyright (C) STMicroelectronics SA 2014
	* Authors: Vincent Abriou <vincent.abriou@st.com>
	* Fabien Dessenne <fabien.dessenne@st.com>
	* for STMicroelectronics.
	* License terms: GNU General Public License (GPL), version 2
	*/

	#include <linux/seq_file.h>

	#include <drm/drm_atomic.h>
	#include <drm/drm_fb_cma_helper.h>
	#include <drm/drm_gem_cma_helper.h>

	#include "sti_compositor.h"
	#include "sti_cursor.h"
	#include "sti_plane.h"
	#include "sti_vtg.h"

	/* Registers */
	#define CUR_CTL 0x00
	#define CUR_VPO 0x0C
	#define CUR_PML 0x14
	#define CUR_PMP 0x18
	#define CUR_SIZE 0x1C
	#define CUR_CML 0x20
	#define CUR_AWS 0x28
	#define CUR_AWE 0x2C

	#define CUR_CTL_CLUT_UPDATE BIT(1)

	#define STI_CURS_MIN_SIZE 1
	#define STI_CURS_MAX_SIZE 128

	/*
	* pixmap dma buffer stucture
	*
	* @paddr: physical address
	* @size: buffer size
	* @base: virtual address
	*/
	struct dma_pixmap {
	dma_addr_t paddr;
	size_t size;
	void *base;
	};

	/**
	* STI Cursor structure
	*
	* @sti_plane: sti_plane structure
	* @dev: driver device
	* @regs: cursor registers
	* @width: cursor width
	* @height: cursor height
	* @clut: color look up table
	* @clut_paddr: color look up table physical address
	* @pixmap: pixmap dma buffer (clut8-format cursor)
	*/
	struct sti_cursor {
	struct sti_plane plane;
	struct device *dev;
	void __iomem *regs;
	unsigned int width;
	unsigned int height;
	unsigned short *clut;
	dma_addr_t clut_paddr;
	struct dma_pixmap pixmap;
	};

	static const uint32_t cursor_supported_formats[] = {
	DRM_FORMAT_ARGB8888,
	};

	#define to_sti_cursor(x) container_of(x, struct sti_cursor, plane)

	#define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
	readl(cursor->regs + reg))

	static void cursor_dbg_vpo(struct seq_file *s, u32 val)
	{
	seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);
	}

	static void cursor_dbg_size(struct seq_file *s, u32 val)
	{
	seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF);
	}

	static void cursor_dbg_pml(struct seq_file *s,
	struct sti_cursor *cursor, u32 val)
	{
	if (cursor->pixmap.paddr == val)
	seq_printf(s, "\tVirt @: %p", cursor->pixmap.base);
	}

	static void cursor_dbg_cml(struct seq_file *s,
	struct sti_cursor *cursor, u32 val)
	{
	if (cursor->clut_paddr == val)
	seq_printf(s, "\tVirt @: %p", cursor->clut);
	}

	static int cursor_dbg_show(struct seq_file s, void data)
	{
	struct drm_info_node *node = s->private;
	struct sti_cursor cursor = (struct sti_cursor )node->info_ent->data;

	seq_printf(s, "%s: (vaddr = 0x%p)",
	sti_plane_to_str(&cursor->plane), cursor->regs);

	DBGFS_DUMP(CUR_CTL);
	DBGFS_DUMP(CUR_VPO);
	cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO));
	DBGFS_DUMP(CUR_PML);
	cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML));
	DBGFS_DUMP(CUR_PMP);
	DBGFS_DUMP(CUR_SIZE);
	cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE));
	DBGFS_DUMP(CUR_CML);
	cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML));
	DBGFS_DUMP(CUR_AWS);
	DBGFS_DUMP(CUR_AWE);
	seq_puts(s, "\n");

	return 0;
	}

	static struct drm_info_list cursor_debugfs_files[] = {
	{ "cursor", cursor_dbg_show, 0, NULL },
	};

	static int cursor_debugfs_init(struct sti_cursor *cursor,
	struct drm_minor *minor)
	{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++)
	cursor_debugfs_files[i].data = cursor;

	return drm_debugfs_create_files(cursor_debugfs_files,
	ARRAY_SIZE(cursor_debugfs_files),
	minor->debugfs_root, minor);
	}

	static void sti_cursor_argb8888_to_clut8(struct sti_cursor cursor, u32 src)
	{
	u8 *dst = cursor->pixmap.base;
	unsigned int i, j;
	u32 a, r, g, b;

	for (i = 0; i < cursor->height; i++) {
	for (j = 0; j < cursor->width; j++) {
	/* Pick the 2 higher bits of each component */
	a = (*src >> 30) & 3;
	r = (*src >> 22) & 3;
	g = (*src >> 14) & 3;
	b = (*src >> 6) & 3;
	*dst = a << 6 \| r << 4 \| g << 2 \| b;
	src++;
	dst++;
	}
	}
	}

	static void sti_cursor_init(struct sti_cursor *cursor)
	{
	unsigned short *base = cursor->clut;
	unsigned int a, r, g, b;

	/* Assign CLUT values, ARGB444 format */
	for (a = 0; a < 4; a++)
	for (r = 0; r < 4; r++)
	for (g = 0; g < 4; g++)
	for (b = 0; b < 4; b++)
	base++ = (a 5) << 12 \|
	(r * 5) << 8 \|
	(g * 5) << 4 \|
	(b * 5);
	}

	static int sti_cursor_atomic_check(struct drm_plane *drm_plane,
	struct drm_plane_state *state)
	{
	struct sti_plane *plane = to_sti_plane(drm_plane);
	struct sti_cursor *cursor = to_sti_cursor(plane);
	struct drm_crtc *crtc = state->crtc;
	struct drm_framebuffer *fb = state->fb;
	struct drm_crtc_state *crtc_state;
	struct drm_display_mode *mode;
	int dst_x, dst_y, dst_w, dst_h;
	int src_w, src_h;

	/* no need for further checks if the plane is being disabled */
	if (!crtc \|\| !fb)
	return 0;

	crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
	mode = &crtc_state->mode;
	dst_x = state->crtc_x;
	dst_y = state->crtc_y;
	dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
	dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
	/* src_x are in 16.16 format */
	src_w = state->src_w >> 16;
	src_h = state->src_h >> 16;

	if (src_w < STI_CURS_MIN_SIZE \|\|
	src_h < STI_CURS_MIN_SIZE \|\|
	src_w > STI_CURS_MAX_SIZE \|\|
	src_h > STI_CURS_MAX_SIZE) {
	DRM_ERROR("Invalid cursor size (%dx%d)\n",
	src_w, src_h);
	return -EINVAL;
	}

	/* If the cursor size has changed, re-allocated the pixmap */
	if (!cursor->pixmap.base \|\|
	(cursor->width != src_w) \|\|
	(cursor->height != src_h)) {
	cursor->width = src_w;
	cursor->height = src_h;

	if (cursor->pixmap.base)
	dma_free_wc(cursor->dev, cursor->pixmap.size,
	cursor->pixmap.base, cursor->pixmap.paddr);

	cursor->pixmap.size = cursor->width * cursor->height;

	cursor->pixmap.base = dma_alloc_wc(cursor->dev,
	cursor->pixmap.size,
	&cursor->pixmap.paddr,
	GFP_KERNEL \| GFP_DMA);
	if (!cursor->pixmap.base) {
	DRM_ERROR("Failed to allocate memory for pixmap\n");
	return -EINVAL;
	}
	}

	if (!drm_fb_cma_get_gem_obj(fb, 0)) {
	DRM_ERROR("Can't get CMA GEM object for fb\n");
	return -EINVAL;
	}

	DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
	crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)),
	drm_plane->base.id, sti_plane_to_str(plane));
	DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y);

	return 0;
	}

	static void sti_cursor_atomic_update(struct drm_plane *drm_plane,
	struct drm_plane_state *oldstate)
	{
	struct drm_plane_state *state = drm_plane->state;
	struct sti_plane *plane = to_sti_plane(drm_plane);
	struct sti_cursor *cursor = to_sti_cursor(plane);
	struct drm_crtc *crtc = state->crtc;
	struct drm_framebuffer *fb = state->fb;
	struct drm_display_mode *mode;
	int dst_x, dst_y;
	struct drm_gem_cma_object *cma_obj;
	u32 y, x;
	u32 val;

	if (!crtc \|\| !fb)
	return;

	mode = &crtc->mode;
	dst_x = state->crtc_x;
	dst_y = state->crtc_y;

	cma_obj = drm_fb_cma_get_gem_obj(fb, 0);

	/* Convert ARGB8888 to CLUT8 */
	sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr);

	/* AWS and AWE depend on the mode */
	y = sti_vtg_get_line_number(*mode, 0);
	x = sti_vtg_get_pixel_number(*mode, 0);
	val = y << 16 \| x;
	writel(val, cursor->regs + CUR_AWS);
	y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
	x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
	val = y << 16 \| x;
	writel(val, cursor->regs + CUR_AWE);

	/* Set memory location, size, and position */
	writel(cursor->pixmap.paddr, cursor->regs + CUR_PML);
	writel(cursor->width, cursor->regs + CUR_PMP);
	writel(cursor->height << 16 \| cursor->width, cursor->regs + CUR_SIZE);

	y = sti_vtg_get_line_number(*mode, dst_y);
	x = sti_vtg_get_pixel_number(*mode, dst_x);
	writel((y << 16) \| x, cursor->regs + CUR_VPO);

	/* Set and fetch CLUT */
	writel(cursor->clut_paddr, cursor->regs + CUR_CML);
	writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL);

	sti_plane_update_fps(plane, true, false);

	plane->status = STI_PLANE_UPDATED;
	}

	static void sti_cursor_atomic_disable(struct drm_plane *drm_plane,
	struct drm_plane_state *oldstate)
	{
	struct sti_plane *plane = to_sti_plane(drm_plane);

	if (!drm_plane->crtc) {
	DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
	drm_plane->base.id);
	return;
	}

	DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
	drm_plane->crtc->base.id,
	sti_mixer_to_str(to_sti_mixer(drm_plane->crtc)),
	drm_plane->base.id, sti_plane_to_str(plane));

	plane->status = STI_PLANE_DISABLING;
	}

	static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
	.atomic_check = sti_cursor_atomic_check,
	.atomic_update = sti_cursor_atomic_update,
	.atomic_disable = sti_cursor_atomic_disable,
	};

	static void sti_cursor_destroy(struct drm_plane *drm_plane)
	{
	DRM_DEBUG_DRIVER("\n");

	drm_plane_helper_disable(drm_plane);
	drm_plane_cleanup(drm_plane);
	}

	static int sti_cursor_late_register(struct drm_plane *drm_plane)
	{
	struct sti_plane *plane = to_sti_plane(drm_plane);
	struct sti_cursor *cursor = to_sti_cursor(plane);

	return cursor_debugfs_init(cursor, drm_plane->dev->primary);
	}

	struct drm_plane_funcs sti_cursor_plane_helpers_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.destroy = sti_cursor_destroy,
	.set_property = drm_atomic_helper_plane_set_property,
	.reset = sti_plane_reset,
	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
	.late_register = sti_cursor_late_register,
	};

	struct drm_plane sti_cursor_create(struct drm_device drm_dev,
	struct device *dev, int desc,
	void __iomem *baseaddr,
	unsigned int possible_crtcs)
	{
	struct sti_cursor *cursor;
	size_t size;
	int res;

	cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL);
	if (!cursor) {
	DRM_ERROR("Failed to allocate memory for cursor\n");
	return NULL;
	}

	/* Allocate clut buffer */
	size = 0x100 * sizeof(unsigned short);
	cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr,
	GFP_KERNEL \| GFP_DMA);

	if (!cursor->clut) {
	DRM_ERROR("Failed to allocate memory for cursor clut\n");
	goto err_clut;
	}

	cursor->dev = dev;
	cursor->regs = baseaddr;
	cursor->plane.desc = desc;
	cursor->plane.status = STI_PLANE_DISABLED;

	sti_cursor_init(cursor);

	res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane,
	possible_crtcs,
	&sti_cursor_plane_helpers_funcs,
	cursor_supported_formats,
	ARRAY_SIZE(cursor_supported_formats),
	DRM_PLANE_TYPE_CURSOR, NULL);
	if (res) {
	DRM_ERROR("Failed to initialize universal plane\n");
	goto err_plane;
	}

	drm_plane_helper_add(&cursor->plane.drm_plane,
	&sti_cursor_helpers_funcs);

	sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR);

	return &cursor->plane.drm_plane;

	err_plane:
	dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr);
	err_clut:
	devm_kfree(dev, cursor);
	return NULL;
	}