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

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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>
This commit is contained in:
Kamil Debski 2011-10-06 11:32:12 -03:00 committed by Mauro Carvalho Chehab
parent 8c8ee11345
commit 918847341a
7 changed files with 1142 additions and 0 deletions
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9
drivers/media/video/Kconfig
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@ -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"

2
drivers/media/video/Makefile
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@ -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

3
drivers/media/video/s5p-g2d/Makefile Normal file
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@ -0,0 +1,3 @@
s5p-g2d-objs := g2d.o g2d-hw.o
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_G2D) += s5p-g2d.o

106
drivers/media/video/s5p-g2d/g2d-hw.c Normal file
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@ -0,0 +1,106 @@
/*
* 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);
}

115
drivers/media/video/s5p-g2d/g2d-regs.h Normal file
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@ -0,0 +1,115 @@
/*
* 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

824
drivers/media/video/s5p-g2d/g2d.c Normal file
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@ -0,0 +1,824 @@
/*
* 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");

83
drivers/media/video/s5p-g2d/g2d.h Normal file
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@ -0,0 +1,83 @@
/*
* 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);