[media] v4l: add G2D driver for s5p device family

G2D is a 2D graphics accelerator engine present in the s5p family
of Samsung SoCs. It is capable of bitblt and raster operations on
images having dimensions of up to 8000x8000.
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig

@@ -1098,6 +1098,15 @@ config VIDEO_MEM2MEM_TESTDEV
 	  This is a virtual test device for the memory-to-memory driver
 	  framework.
 
+config VIDEO_SAMSUNG_S5P_G2D
+	tristate "Samsung S5P and EXYNOS4 G2D 2d graphics accelerator driver"
+	depends on VIDEO_DEV && VIDEO_V4L2 && PLAT_S5P
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
+	default n
+	---help---
+	  This is a v4l2 driver for Samsung S5P and EXYNOS4 G2D
+	  2d graphics accelerator.
 
 config VIDEO_SAMSUNG_S5P_MFC
 	tristate "Samsung S5P MFC 5.1 Video Codec"

drivers/media/video/Makefile

@@ -180,6 +180,8 @@ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) 	+= s5p-fimc/
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC)	+= s5p-mfc/
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV)	+= s5p-tv/
 
+obj-$(CONFIG_VIDEO_SAMSUNG_S5P_G2D)	+= s5p-g2d/
+
 obj-$(CONFIG_ARCH_DAVINCI)		+= davinci/
 
 obj-$(CONFIG_VIDEO_SH_VOU)		+= sh_vou.o

drivers/media/video/s5p-g2d/Makefile

+s5p-g2d-objs := g2d.o g2d-hw.o
+
+obj-$(CONFIG_VIDEO_SAMSUNG_S5P_G2D)	+= s5p-g2d.o

drivers/media/video/s5p-g2d/g2d-hw.c

+/*
+ * Samsung S5P G2D - 2D Graphics Accelerator Driver
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Kamil Debski, <k.debski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+
+#include <linux/io.h>
+
+#include "g2d.h"
+#include "g2d-regs.h"
+
+#define w(x, a)	writel((x), d->regs + (a))
+#define r(a)	readl(d->regs + (a))
+
+/* g2d_reset clears all g2d registers */
+void g2d_reset(struct g2d_dev *d)
+{
+	w(1, SOFT_RESET_REG);
+}
+
+void g2d_set_src_size(struct g2d_dev *d, struct g2d_frame *f)
+{
+	u32 n;
+	u32 stride;
+
+	w(f->stride & 0xFFFF, SRC_STRIDE_REG);
+
+	n = f->o_height & 0xFFF;
+	n <<= 16;
+	n |= f->o_width & 0xFFF;
+	w(n, SRC_LEFT_TOP_REG);
+
+	n = f->bottom & 0xFFF;
+	n <<= 16;
+	n |= f->right & 0xFFF;
+	w(n, SRC_RIGHT_BOTTOM_REG);
+
+	w(f->fmt->hw, SRC_COLOR_MODE_REG);
+}
+
+void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
+{
+	w(a, SRC_BASE_ADDR_REG);
+}
+
+void g2d_set_dst_size(struct g2d_dev *d, struct g2d_frame *f)
+{
+	u32 n;
+	u32 stride;
+
+	w(f->stride & 0xFFFF, DST_STRIDE_REG);
+
+	n = f->o_height & 0xFFF;
+	n <<= 16;
+	n |= f->o_width & 0xFFF;
+	w(n, DST_LEFT_TOP_REG);
+
+	n = f->bottom & 0xFFF;
+	n <<= 16;
+	n |= f->right & 0xFFF;
+	w(n, DST_RIGHT_BOTTOM_REG);
+
+	w(f->fmt->hw, DST_COLOR_MODE_REG);
+}
+
+void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
+{
+	w(a, DST_BASE_ADDR_REG);
+}
+
+void g2d_set_rop4(struct g2d_dev *d, u32 r)
+{
+	w(r, ROP4_REG);
+}
+
+u32 g2d_cmd_stretch(u32 e)
+{
+	e &= 1;
+	return e << 4;
+}
+
+void g2d_set_cmd(struct g2d_dev *d, u32 c)
+{
+	w(c, BITBLT_COMMAND_REG);
+}
+
+void g2d_start(struct g2d_dev *d)
+{
+	/* Clear cache */
+	w(0x7, CACHECTL_REG);
+	/* Enable interrupt */
+	w(1, INTEN_REG);
+	/* Start G2D engine */
+	w(1, BITBLT_START_REG);
+}
+
+void g2d_clear_int(struct g2d_dev *d)
+{
+	w(1, INTC_PEND_REG);
+}

drivers/media/video/s5p-g2d/g2d-regs.h

+/*
+ * Samsung S5P G2D - 2D Graphics Accelerator Driver
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Kamil Debski, <k.debski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+
+/* General Registers */
+#define SOFT_RESET_REG		0x0000	/* Software reset reg */
+#define INTEN_REG		0x0004	/* Interrupt Enable reg */
+#define INTC_PEND_REG		0x000C	/* Interrupt Control Pending reg */
+#define FIFO_STAT_REG		0x0010	/* Command FIFO Status reg */
+#define AXI_ID_MODE_REG		0x0014	/* AXI Read ID Mode reg */
+#define CACHECTL_REG		0x0018	/* Cache & Buffer clear reg */
+#define AXI_MODE_REG		0x001C	/* AXI Mode reg */
+
+/* Command Registers */
+#define BITBLT_START_REG	0x0100	/* BitBLT Start reg */
+#define BITBLT_COMMAND_REG	0x0104	/* Command reg for BitBLT */
+
+/* Parameter Setting Registers (Rotate & Direction) */
+#define ROTATE_REG		0x0200	/* Rotation reg */
+#define SRC_MSK_DIRECT_REG	0x0204	/* Src and Mask Direction reg */
+#define DST_PAT_DIRECT_REG	0x0208	/* Dest and Pattern Direction reg */
+
+/* Parameter Setting Registers (Src) */
+#define SRC_SELECT_REG		0x0300	/* Src Image Selection reg */
+#define SRC_BASE_ADDR_REG	0x0304	/* Src Image Base Address reg */
+#define SRC_STRIDE_REG		0x0308	/* Src Stride reg */
+#define SRC_COLOR_MODE_REG	0x030C	/* Src Image Color Mode reg */
+#define SRC_LEFT_TOP_REG	0x0310	/* Src Left Top Coordinate reg */
+#define SRC_RIGHT_BOTTOM_REG	0x0314	/* Src Right Bottom Coordinate reg */
+
+/* Parameter Setting Registers (Dest) */
+#define DST_SELECT_REG		0x0400	/* Dest Image Selection reg */
+#define DST_BASE_ADDR_REG	0x0404	/* Dest Image Base Address reg */
+#define DST_STRIDE_REG		0x0408	/* Dest Stride reg */
+#define DST_COLOR_MODE_REG	0x040C	/* Dest Image Color Mode reg */
+#define DST_LEFT_TOP_REG	0x0410	/* Dest Left Top Coordinate reg */
+#define DST_RIGHT_BOTTOM_REG	0x0414	/* Dest Right Bottom Coordinate reg */
+
+/* Parameter Setting Registers (Pattern) */
+#define PAT_BASE_ADDR_REG	0x0500	/* Pattern Image Base Address reg */
+#define PAT_SIZE_REG		0x0504	/* Pattern Image Size reg */
+#define PAT_COLOR_MODE_REG	0x0508	/* Pattern Image Color Mode reg */
+#define PAT_OFFSET_REG		0x050C	/* Pattern Left Top Coordinate reg */
+#define PAT_STRIDE_REG		0x0510	/* Pattern Stride reg */
+
+/* Parameter Setting Registers (Mask) */
+#define MASK_BASE_ADDR_REG	0x0520	/* Mask Base Address reg */
+#define MASK_STRIDE_REG		0x0524	/* Mask Stride reg */
+
+/* Parameter Setting Registers (Clipping Window) */
+#define CW_LT_REG		0x0600	/* LeftTop coordinates of Clip Window */
+#define CW_RB_REG		0x0604	/* RightBottom coordinates of Clip
+								Window */
+
+/* Parameter Setting Registers (ROP & Alpha Setting) */
+#define THIRD_OPERAND_REG	0x0610	/* Third Operand Selection reg */
+#define ROP4_REG		0x0614	/* Raster Operation reg */
+#define ALPHA_REG		0x0618	/* Alpha value, Fading offset value */
+
+/* Parameter Setting Registers (Color) */
+#define FG_COLOR_REG		0x0700	/* Foreground Color reg */
+#define BG_COLOR_REG		0x0704	/* Background Color reg */
+#define BS_COLOR_REG		0x0708	/* Blue Screen Color reg */
+
+/* Parameter Setting Registers (Color Key) */
+#define SRC_COLORKEY_CTRL_REG	0x0710	/* Src Colorkey control reg */
+#define SRC_COLORKEY_DR_MIN_REG	0x0714	/* Src Colorkey Decision Reference
+								Min reg */
+#define SRC_COLORKEY_DR_MAX_REG	0x0718	/* Src Colorkey Decision Reference
+								Max reg */
+#define DST_COLORKEY_CTRL_REG	0x071C	/* Dest Colorkey control reg */
+#define DST_COLORKEY_DR_MIN_REG	0x0720	/* Dest Colorkey Decision Reference
+								Min reg */
+#define DST_COLORKEY_DR_MAX_REG	0x0724	/* Dest Colorkey Decision Reference
+								Max reg */
+
+/* Color mode values */
+
+#define ORDER_XRGB		0
+#define ORDER_RGBX		1
+#define ORDER_XBGR		2
+#define ORDER_BGRX		3
+
+#define MODE_XRGB_8888		0
+#define MODE_ARGB_8888		1
+#define MODE_RGB_565		2
+#define MODE_XRGB_1555		3
+#define MODE_ARGB_1555		4
+#define MODE_XRGB_4444		5
+#define MODE_ARGB_4444		6
+#define MODE_PACKED_RGB_888	7
+
+#define COLOR_MODE(o, m)	(((o) << 4) | (m))
+
+/* ROP4 operation values */
+#define ROP4_COPY		0xCCCC
+#define ROP4_INVERT		0x3333
+
+/* Hardware limits */
+#define MAX_WIDTH		8000
+#define MAX_HEIGHT		8000
+
+#define G2D_TIMEOUT		500
+
+#define DEFAULT_WIDTH		100
+#define DEFAULT_HEIGHT		100
+

drivers/media/video/s5p-g2d/g2d.c

+/*
+ * Samsung S5P G2D - 2D Graphics Accelerator Driver
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Kamil Debski, <k.debski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/version.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+
+#include <linux/platform_device.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "g2d.h"
+#include "g2d-regs.h"
+
+#define fh2ctx(__fh) container_of(__fh, struct g2d_ctx, fh)
+
+static struct g2d_fmt formats[] = {
+	{
+		.name	= "XRGB_8888",
+		.fourcc	= V4L2_PIX_FMT_RGB32,
+		.depth	= 32,
+		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_8888),
+	},
+	{
+		.name	= "RGB_565",
+		.fourcc	= V4L2_PIX_FMT_RGB565X,
+		.depth	= 16,
+		.hw	= COLOR_MODE(ORDER_XRGB, MODE_RGB_565),
+	},
+	{
+		.name	= "XRGB_1555",
+		.fourcc	= V4L2_PIX_FMT_RGB555X,
+		.depth	= 16,
+		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_1555),
+	},
+	{
+		.name	= "XRGB_4444",
+		.fourcc	= V4L2_PIX_FMT_RGB444,
+		.depth	= 16,
+		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_4444),
+	},
+	{
+		.name	= "PACKED_RGB_888",
+		.fourcc	= V4L2_PIX_FMT_RGB24,
+		.depth	= 24,
+		.hw	= COLOR_MODE(ORDER_XRGB, MODE_PACKED_RGB_888),
+	},
+};
+#define NUM_FORMATS ARRAY_SIZE(formats)
+
+struct g2d_frame def_frame = {
+	.width		= DEFAULT_WIDTH,
+	.height		= DEFAULT_HEIGHT,
+	.c_width	= DEFAULT_WIDTH,
+	.c_height	= DEFAULT_HEIGHT,
+	.o_width	= 0,
+	.o_height	= 0,
+	.fmt		= &formats[0],
+	.right		= DEFAULT_WIDTH,
+	.bottom		= DEFAULT_HEIGHT,
+};
+
+struct g2d_fmt *find_fmt(struct v4l2_format *f)
+{
+	unsigned int i;
+	for (i = 0; i < NUM_FORMATS; i++) {
+		if (formats[i].fourcc == f->fmt.pix.pixelformat)
+			return &formats[i];
+	}
+	return NULL;
+}
+
+
+static struct g2d_frame *get_frame(struct g2d_ctx *ctx,
+							enum v4l2_buf_type type)
+{
+	switch (type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		return &ctx->in;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+		return &ctx->out;
+	default:
+		return ERR_PTR(-EINVAL);
+	}
+}
+
+static int g2d_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+			   unsigned int *nbuffers, unsigned int *nplanes,
+			   unsigned int sizes[], void *alloc_ctxs[])
+{
+	struct g2d_ctx *ctx = vb2_get_drv_priv(vq);
+	struct g2d_frame *f = get_frame(ctx, vq->type);
+
+	if (IS_ERR(f))
+		return PTR_ERR(f);
+
+	sizes[0] = f->size;
+	*nplanes = 1;
+	alloc_ctxs[0] = ctx->dev->alloc_ctx;
+
+	if (*nbuffers == 0)
+		*nbuffers = 1;
+
+	return 0;
+}
+
+static int g2d_buf_prepare(struct vb2_buffer *vb)
+{
+	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct g2d_frame *f = get_frame(ctx, vb->vb2_queue->type);
+
+	if (IS_ERR(f))
+		return PTR_ERR(f);
+	vb2_set_plane_payload(vb, 0, f->size);
+	return 0;
+}
+
+static void g2d_buf_queue(struct vb2_buffer *vb)
+{
+	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
+}
+
+
+static struct vb2_ops g2d_qops = {
+	.queue_setup	= g2d_queue_setup,
+	.buf_prepare	= g2d_buf_prepare,
+	.buf_queue	= g2d_buf_queue,
+};
+
+static int queue_init(void *priv, struct vb2_queue *src_vq,
+						struct vb2_queue *dst_vq)
+{
+	struct g2d_ctx *ctx = priv;
+	int ret;
+
+	memset(src_vq, 0, sizeof(*src_vq));
+	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+	src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+	src_vq->drv_priv = ctx;
+	src_vq->ops = &g2d_qops;
+	src_vq->mem_ops = &vb2_dma_contig_memops;
+	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+
+	ret = vb2_queue_init(src_vq);
+	if (ret)
+		return ret;
+
+	memset(dst_vq, 0, sizeof(*dst_vq));
+	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+	dst_vq->drv_priv = ctx;
+	dst_vq->ops = &g2d_qops;
+	dst_vq->mem_ops = &vb2_dma_contig_memops;
+	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+
+	return vb2_queue_init(dst_vq);
+}
+
+static int g2d_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct g2d_ctx *ctx = container_of(ctrl->handler, struct g2d_ctx,
+								ctrl_handler);
+	switch (ctrl->id) {
+	case V4L2_CID_COLORFX:
+		if (ctrl->val == V4L2_COLORFX_NEGATIVE)
+			ctx->rop = ROP4_INVERT;
+		else
+			ctx->rop = ROP4_COPY;
+	default:
+		v4l2_err(&ctx->dev->v4l2_dev, "unknown control\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops g2d_ctrl_ops = {
+	.s_ctrl		= g2d_s_ctrl,
+};
+
+int g2d_setup_ctrls(struct g2d_ctx *ctx)
+{
+	struct g2d_dev *dev = ctx->dev;
+
+	v4l2_ctrl_handler_init(&ctx->ctrl_handler, 1);
+	if (ctx->ctrl_handler.error) {
+		v4l2_err(&dev->v4l2_dev, "v4l2_ctrl_handler_init failed\n");
+		return ctx->ctrl_handler.error;
+	}
+
+	v4l2_ctrl_new_std_menu(
+		&ctx->ctrl_handler,
+		&g2d_ctrl_ops,
+		V4L2_CID_COLORFX,
+		V4L2_COLORFX_NEGATIVE,
+		~((1 << V4L2_COLORFX_NONE) | (1 << V4L2_COLORFX_NEGATIVE)),
+		V4L2_COLORFX_NONE);
+
+	if (ctx->ctrl_handler.error) {
+		v4l2_err(&dev->v4l2_dev, "v4l2_ctrl_handler_init failed\n");
+		return ctx->ctrl_handler.error;
+	}
+
+	return 0;
+}
+
+static int g2d_open(struct file *file)
+{
+	struct g2d_dev *dev = video_drvdata(file);
+	struct g2d_ctx *ctx = NULL;
+	int ret = 0;
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+	ctx->dev = dev;
+	/* Set default formats */
+	ctx->in		= def_frame;
+	ctx->out	= def_frame;
+
+	ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
+	if (IS_ERR(ctx->m2m_ctx)) {
+		ret = PTR_ERR(ctx->m2m_ctx);
+		kfree(ctx);
+		return ret;
+	}
+	v4l2_fh_init(&ctx->fh, video_devdata(file));
+	file->private_data = &ctx->fh;
+	v4l2_fh_add(&ctx->fh);
+
+	g2d_setup_ctrls(ctx);
+
+	/* Write the default values to the ctx struct */
+	v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
+
+	ctx->fh.ctrl_handler = &ctx->ctrl_handler;
+
+	v4l2_info(&dev->v4l2_dev, "instance opened\n");
+	return 0;
+}
+
+static int g2d_release(struct file *file)
+{
+	struct g2d_dev *dev = video_drvdata(file);
+	struct g2d_ctx *ctx = fh2ctx(file->private_data);
+
+	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+	v4l2_fh_del(&ctx->fh);
+	v4l2_fh_exit(&ctx->fh);
+	kfree(ctx);
+	v4l2_info(&dev->v4l2_dev, "instance closed\n");
+	return 0;
+}
+
+
+static int vidioc_querycap(struct file *file, void *priv,
+				struct v4l2_capability *cap)
+{
+	strncpy(cap->driver, G2D_NAME, sizeof(cap->driver) - 1);
+	strncpy(cap->card, G2D_NAME, sizeof(cap->card) - 1);
+	cap->bus_info[0] = 0;
+	cap->version = KERNEL_VERSION(1, 0, 0);
+	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
+							| V4L2_CAP_STREAMING;
+	return 0;
+}
+
+static int vidioc_enum_fmt(struct file *file, void *prv, struct v4l2_fmtdesc *f)
+{
+	struct g2d_fmt *fmt;
+	if (f->index >= NUM_FORMATS)
+		return -EINVAL;
+	fmt = &formats[f->index];
+	f->pixelformat = fmt->fourcc;
+	strncpy(f->description, fmt->name, sizeof(f->description) - 1);
+	return 0;
+}
+
+static int vidioc_g_fmt(struct file *file, void *prv, struct v4l2_format *f)
+{
+	struct g2d_ctx *ctx = prv;
+	struct vb2_queue *vq;
+	struct g2d_frame *frm;
+
+	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+	if (!vq)
+		return -EINVAL;
+	frm = get_frame(ctx, f->type);
+	if (IS_ERR(frm))
+		return PTR_ERR(frm);
+
+	f->fmt.pix.width		= frm->width;
+	f->fmt.pix.height		= frm->height;
+	f->fmt.pix.field		= V4L2_FIELD_NONE;
+	f->fmt.pix.pixelformat		= frm->fmt->fourcc;
+	f->fmt.pix.bytesperline		= (frm->width * frm->fmt->depth) >> 3;
+	f->fmt.pix.sizeimage		= frm->size;
+	return 0;
+}
+
+static int vidioc_try_fmt(struct file *file, void *prv, struct v4l2_format *f)
+{
+	struct g2d_fmt *fmt;
+	enum v4l2_field *field;
+
+	fmt = find_fmt(f);
+	if (!fmt)
+		return -EINVAL;
+
+	field = &f->fmt.pix.field;
+	if (*field == V4L2_FIELD_ANY)
+		*field = V4L2_FIELD_NONE;
+	else if (*field != V4L2_FIELD_NONE)
+		return -EINVAL;
+
+	if (f->fmt.pix.width > MAX_WIDTH)
+		f->fmt.pix.width = MAX_WIDTH;
+	if (f->fmt.pix.height > MAX_HEIGHT)
+		f->fmt.pix.height = MAX_HEIGHT;
+
+	if (f->fmt.pix.width < 1)
+		f->fmt.pix.width = 1;
+	if (f->fmt.pix.height < 1)
+		f->fmt.pix.height = 1;
+
+	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
+	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+	return 0;
+}
+
+static int vidioc_s_fmt(struct file *file, void *prv, struct v4l2_format *f)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_dev *dev = ctx->dev;
+	struct vb2_queue *vq;
+	struct g2d_frame *frm;
+	struct g2d_fmt *fmt;
+	int ret = 0;
+
+	/* Adjust all values accordingly to the hardware capabilities
+	 * and chosen format. */
+	ret = vidioc_try_fmt(file, prv, f);
+	if (ret)
+		return ret;
+	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+	if (vb2_is_busy(vq)) {
+		v4l2_err(&dev->v4l2_dev, "queue (%d) bust\n", f->type);
+		return -EBUSY;
+	}
+	frm = get_frame(ctx, f->type);
+	if (IS_ERR(frm))
+		return PTR_ERR(frm);
+	fmt = find_fmt(f);
+	if (!fmt)
+		return -EINVAL;
+	frm->width	= f->fmt.pix.width;
+	frm->height	= f->fmt.pix.height;
+	frm->size	= f->fmt.pix.sizeimage;
+	/* Reset crop settings */
+	frm->o_width	= 0;
+	frm->o_height	= 0;
+	frm->c_width	= frm->width;
+	frm->c_height	= frm->height;
+	frm->right	= frm->width;
+	frm->bottom	= frm->height;
+	frm->fmt	= fmt;
+	frm->stride	= f->fmt.pix.bytesperline;
+	return 0;
+}
+
+static unsigned int g2d_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct g2d_ctx *ctx = fh2ctx(file->private_data);
+	return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
+}
+
+static int g2d_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct g2d_ctx *ctx = fh2ctx(file->private_data);
+	return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
+}
+
+static int vidioc_reqbufs(struct file *file, void *priv,
+			struct v4l2_requestbuffers *reqbufs)
+{
+	struct g2d_ctx *ctx = priv;
+	return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
+}
+
+static int vidioc_querybuf(struct file *file, void *priv,
+			struct v4l2_buffer *buf)
+{
+	struct g2d_ctx *ctx = priv;
+	return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+	struct g2d_ctx *ctx = priv;
+	return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+	struct g2d_ctx *ctx = priv;
+	return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
+}
+
+
+static int vidioc_streamon(struct file *file, void *priv,
+					enum v4l2_buf_type type)
+{
+	struct g2d_ctx *ctx = priv;
+	return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
+}
+
+static int vidioc_streamoff(struct file *file, void *priv,
+					enum v4l2_buf_type type)
+{
+	struct g2d_ctx *ctx = priv;
+	return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
+}
+
+static int vidioc_cropcap(struct file *file, void *priv,
+					struct v4l2_cropcap *cr)
+{
+	struct g2d_ctx *ctx = priv;
+	struct g2d_frame *f;
+
+	f = get_frame(ctx, cr->type);
+	if (IS_ERR(f))
+		return PTR_ERR(f);
+
+	cr->bounds.left		= 0;
+	cr->bounds.top		= 0;
+	cr->bounds.width	= f->width;
+	cr->bounds.height	= f->height;
+	cr->defrect		= cr->bounds;
+	return 0;
+}
+
+static int vidioc_g_crop(struct file *file, void *prv, struct v4l2_crop *cr)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_frame *f;
+
+	f = get_frame(ctx, cr->type);
+	if (IS_ERR(f))
+		return PTR_ERR(f);
+
+	cr->c.left	= f->o_height;
+	cr->c.top	= f->o_width;
+	cr->c.width	= f->c_width;
+	cr->c.height	= f->c_height;
+	return 0;
+}
+
+static int vidioc_try_crop(struct file *file, void *prv, struct v4l2_crop *cr)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_dev *dev = ctx->dev;
+	struct g2d_frame *f;
+
+	f = get_frame(ctx, cr->type);
+	if (IS_ERR(f))
+		return PTR_ERR(f);
+
+	if (cr->c.top < 0 || cr->c.left < 0) {
+		v4l2_err(&dev->v4l2_dev,
+			"doesn't support negative values for top & left\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int vidioc_s_crop(struct file *file, void *prv, struct v4l2_crop *cr)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_frame *f;
+	int ret;
+
+	ret = vidioc_try_crop(file, prv, cr);
+	if (ret)
+		return ret;
+	f = get_frame(ctx, cr->type);
+	if (IS_ERR(f))
+		return PTR_ERR(f);
+
+	f->c_width	= cr->c.width;
+	f->c_height	= cr->c.height;
+	f->o_width	= cr->c.left;
+	f->o_height	= cr->c.top;
+	f->bottom	= f->o_height + f->c_height;
+	f->right	= f->o_width + f->c_width;
+	return 0;
+}
+
+static void g2d_lock(void *prv)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_dev *dev = ctx->dev;
+	mutex_lock(&dev->mutex);
+}
+
+static void g2d_unlock(void *prv)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_dev *dev = ctx->dev;
+	mutex_unlock(&dev->mutex);
+}
+
+static void job_abort(void *prv)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_dev *dev = ctx->dev;
+	int ret;
+
+	if (dev->curr == 0) /* No job currently running */
+		return;
+
+	ret = wait_event_timeout(dev->irq_queue,
+		dev->curr == 0,
+		msecs_to_jiffies(G2D_TIMEOUT));
+}
+
+static void device_run(void *prv)
+{
+	struct g2d_ctx *ctx = prv;
+	struct g2d_dev *dev = ctx->dev;
+	struct vb2_buffer *src, *dst;
+	u32 cmd = 0;
+
+	dev->curr = ctx;
+
+	src = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
+	dst = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
+
+	clk_enable(dev->gate);
+	g2d_reset(dev);
+
+	g2d_set_src_size(dev, &ctx->in);
+	g2d_set_src_addr(dev, vb2_dma_contig_plane_dma_addr(src, 0));
+
+	g2d_set_dst_size(dev, &ctx->out);
+	g2d_set_dst_addr(dev, vb2_dma_contig_plane_dma_addr(dst, 0));
+
+	g2d_set_rop4(dev, ctx->rop);
+	if (ctx->in.c_width != ctx->out.c_width ||
+		ctx->in.c_height != ctx->out.c_height)
+		cmd |= g2d_cmd_stretch(1);
+	g2d_set_cmd(dev, cmd);
+	g2d_start(dev);
+}
+
+static irqreturn_t g2d_isr(int irq, void *prv)
+{
+	struct g2d_dev *dev = prv;
+	struct g2d_ctx *ctx = dev->curr;
+	struct vb2_buffer *src, *dst;
+
+	g2d_clear_int(dev);
+	clk_disable(dev->gate);
+
+	BUG_ON(ctx == 0);
+
+	src = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
+	dst = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
+
+	BUG_ON(src == 0);
+	BUG_ON(dst == 0);
+
+	v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
+	v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
+	v4l2_m2m_job_finish(dev->m2m_dev, ctx->m2m_ctx);
+
+	dev->curr = 0;
+	wake_up(&dev->irq_queue);
+	return IRQ_HANDLED;
+}
+
+static const struct v4l2_file_operations g2d_fops = {
+	.owner		= THIS_MODULE,
+	.open		= g2d_open,
+	.release	= g2d_release,
+	.poll		= g2d_poll,
+	.unlocked_ioctl	= video_ioctl2,
+	.mmap		= g2d_mmap,
+};
+
+static const struct v4l2_ioctl_ops g2d_ioctl_ops = {
+	.vidioc_querycap	= vidioc_querycap,
+
+	.vidioc_enum_fmt_vid_cap	= vidioc_enum_fmt,
+	.vidioc_g_fmt_vid_cap		= vidioc_g_fmt,
+	.vidioc_try_fmt_vid_cap		= vidioc_try_fmt,
+	.vidioc_s_fmt_vid_cap		= vidioc_s_fmt,
+
+	.vidioc_enum_fmt_vid_out	= vidioc_enum_fmt,
+	.vidioc_g_fmt_vid_out		= vidioc_g_fmt,
+	.vidioc_try_fmt_vid_out		= vidioc_try_fmt,
+	.vidioc_s_fmt_vid_out		= vidioc_s_fmt,
+
+	.vidioc_reqbufs			= vidioc_reqbufs,
+	.vidioc_querybuf		= vidioc_querybuf,
+
+	.vidioc_qbuf			= vidioc_qbuf,
+	.vidioc_dqbuf			= vidioc_dqbuf,
+
+	.vidioc_streamon		= vidioc_streamon,
+	.vidioc_streamoff		= vidioc_streamoff,
+
+	.vidioc_g_crop			= vidioc_g_crop,
+	.vidioc_s_crop			= vidioc_s_crop,
+	.vidioc_cropcap			= vidioc_cropcap,
+};
+
+static struct video_device g2d_videodev = {
+	.name		= G2D_NAME,
+	.fops		= &g2d_fops,
+	.ioctl_ops	= &g2d_ioctl_ops,
+	.minor		= -1,
+	.release	= video_device_release,
+};
+
+static struct v4l2_m2m_ops g2d_m2m_ops = {
+	.device_run	= device_run,
+	.job_abort	= job_abort,
+	.lock		= g2d_lock,
+	.unlock		= g2d_unlock,
+};
+
+static int g2d_probe(struct platform_device *pdev)
+{
+	struct g2d_dev *dev;
+	struct video_device *vfd;
+	struct resource *res;
+	int ret = 0;
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+	spin_lock_init(&dev->irqlock);
+	mutex_init(&dev->mutex);
+	atomic_set(&dev->num_inst, 0);
+	init_waitqueue_head(&dev->irq_queue);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "failed to find registers\n");
+		ret = -ENOENT;
+		goto free_dev;
+	}
+
+	dev->res_regs = request_mem_region(res->start, resource_size(res),
+						dev_name(&pdev->dev));
+
+	if (!dev->res_regs) {
+		dev_err(&pdev->dev, "failed to obtain register region\n");
+		ret = -ENOENT;
+		goto free_dev;
+	}
+
+	dev->regs = ioremap(res->start, resource_size(res));
+	if (!dev->regs) {
+		dev_err(&pdev->dev, "failed to map registers\n");
+		ret = -ENOENT;
+		goto rel_res_regs;
+	}
+
+	dev->clk = clk_get(&pdev->dev, "sclk_fimg2d");
+	if (IS_ERR_OR_NULL(dev->clk)) {
+		dev_err(&pdev->dev, "failed to get g2d clock\n");
+		ret = -ENXIO;
+		goto unmap_regs;
+	}
+
+	dev->gate = clk_get(&pdev->dev, "fimg2d");
+	if (IS_ERR_OR_NULL(dev->gate)) {
+		dev_err(&pdev->dev, "failed to get g2d clock gate\n");
+		ret = -ENXIO;
+		goto put_clk;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "failed to find IRQ\n");
+		ret = -ENXIO;
+		goto put_clk_gate;
+	}
+
+	dev->irq = res->start;
+
+	ret = request_irq(dev->irq, g2d_isr, 0, pdev->name, dev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to install IRQ\n");
+		goto put_clk_gate;
+	}
+
+	dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+	if (IS_ERR(dev->alloc_ctx)) {
+		ret = PTR_ERR(dev->alloc_ctx);
+		goto rel_irq;
+	}
+
+	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
+	if (ret)
+		goto alloc_ctx_cleanup;
+	vfd = video_device_alloc();
+	if (!vfd) {
+		v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
+		ret = -ENOMEM;
+		goto unreg_v4l2_dev;
+	}
+	*vfd = g2d_videodev;
+	vfd->lock = &dev->mutex;
+	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
+	if (ret) {
+		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+		goto rel_vdev;
+	}
+	video_set_drvdata(vfd, dev);
+	snprintf(vfd->name, sizeof(vfd->name), "%s", g2d_videodev.name);
+	dev->vfd = vfd;
+	v4l2_info(&dev->v4l2_dev, "device registered as /dev/video%d\n",
+								vfd->num);
+	platform_set_drvdata(pdev, dev);
+	dev->m2m_dev = v4l2_m2m_init(&g2d_m2m_ops);
+	if (IS_ERR(dev->m2m_dev)) {
+		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
+		ret = PTR_ERR(dev->m2m_dev);
+		goto unreg_video_dev;
+	}
+
+	def_frame.stride = (def_frame.width * def_frame.fmt->depth) >> 3;
+
+	return 0;
+
+unreg_video_dev:
+	video_unregister_device(dev->vfd);
+rel_vdev:
+	video_device_release(vfd);
+unreg_v4l2_dev:
+	v4l2_device_unregister(&dev->v4l2_dev);
+alloc_ctx_cleanup:
+	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
+rel_irq:
+	free_irq(dev->irq, dev);
+put_clk_gate:
+	clk_put(dev->gate);
+put_clk:
+	clk_put(dev->clk);
+unmap_regs:
+	iounmap(dev->regs);
+rel_res_regs:
+	release_resource(dev->res_regs);
+free_dev:
+	kfree(dev);
+	return ret;
+}
+
+static int g2d_remove(struct platform_device *pdev)
+{
+	struct g2d_dev *dev = (struct g2d_dev *)platform_get_drvdata(pdev);
+
+	v4l2_info(&dev->v4l2_dev, "Removing " G2D_NAME);
+	v4l2_m2m_release(dev->m2m_dev);
+	video_unregister_device(dev->vfd);
+	v4l2_device_unregister(&dev->v4l2_dev);
+	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
+	free_irq(dev->irq, dev);
+	clk_put(dev->gate);
+	clk_put(dev->clk);
+	iounmap(dev->regs);
+	release_resource(dev->res_regs);
+	kfree(dev);
+	return 0;
+}
+
+static struct platform_driver g2d_pdrv = {
+	.probe		= g2d_probe,
+	.remove		= g2d_remove,
+	.driver		= {
+		.name = G2D_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+static void __exit g2d_exit(void)
+{
+	platform_driver_unregister(&g2d_pdrv);
+};
+
+static int  __init g2d_init(void)
+{
+	int ret = 0;
+
+	ret = platform_driver_register(&g2d_pdrv);
+	return ret;
+};
+
+module_init(g2d_init);
+module_exit(g2d_exit);
+
+MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
+MODULE_DESCRIPTION("S5P G2D 2d graphics accelerator driver");
+MODULE_LICENSE("GPL");

drivers/media/video/s5p-g2d/g2d.h

+/*
+ * Samsung S5P G2D - 2D Graphics Accelerator Driver
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Kamil Debski, <k.debski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+#define G2D_NAME "s5p-g2d"
+
+struct g2d_dev {
+	struct v4l2_device	v4l2_dev;
+	struct v4l2_m2m_dev	*m2m_dev;
+	struct video_device	*vfd;
+	struct mutex		mutex;
+	spinlock_t		irqlock;
+	atomic_t		num_inst;
+	struct vb2_alloc_ctx	*alloc_ctx;
+	struct resource		*res_regs;
+	void __iomem		*regs;
+	struct clk		*clk;
+	struct clk		*gate;
+	struct g2d_ctx		*curr;
+	int irq;
+	wait_queue_head_t	irq_queue;
+};
+
+struct g2d_frame {
+	/* Original dimensions */
+	u32	width;
+	u32	height;
+	/* Crop size */
+	u32	c_width;
+	u32	c_height;
+	/* Offset */
+	u32	o_width;
+	u32	o_height;
+	/* Image format */
+	struct g2d_fmt *fmt;
+	/* Variables that can calculated once and reused */
+	u32	stride;
+	u32	bottom;
+	u32	right;
+	u32	size;
+};
+
+struct g2d_ctx {
+	struct v4l2_fh fh;
+	struct g2d_dev		*dev;
+	struct v4l2_m2m_ctx     *m2m_ctx;
+	struct g2d_frame	in;
+	struct g2d_frame	out;
+	struct v4l2_ctrl_handler ctrl_handler;
+	u32 rop;
+};
+
+struct g2d_fmt {
+	char	*name;
+	u32	fourcc;
+	int	depth;
+	u32	hw;
+};
+
+
+void g2d_reset(struct g2d_dev *d);
+void g2d_set_src_size(struct g2d_dev *d, struct g2d_frame *f);
+void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a);
+void g2d_set_dst_size(struct g2d_dev *d, struct g2d_frame *f);
+void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a);
+void g2d_start(struct g2d_dev *d);
+void g2d_clear_int(struct g2d_dev *d);
+void g2d_set_rop4(struct g2d_dev *d, u32 r);
+u32 g2d_cmd_stretch(u32 e);
+void g2d_set_cmd(struct g2d_dev *d, u32 c);
+
+