Hi Guennadi,
A few more small comments...
On Fri October 5 2012 11:16:06 Guennadi Liakhovetski wrote:
> Video Engine Unit (VEU) is an IP block, found in multiple SuperH and ARM-
> based sh-mobile and r-mobile SoCs, capable of processing video data. It
> can perform colour-space conversion, scaling and several filtering
> transformations. This patch adds an initial implementation of a mem2mem
> V4L2 driver for VEU. So far only conversion from NV12 to RGB565 is
> supported. Further functionality shall be added in the future.
>
> This driver is based on a VEU vidix driver by Magnus Damm.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
> ---
>
> v3:
> - compliance test is now happy apart from 2 warnings - CREATE_BUFS not
> implemented
> - replaced EPERM with EBUSY
> - use the device instance object as queue private data instead of a random
> first opening file private data
> - S_FMT doesn't promote the caller to a stream owner
>
> drivers/media/platform/Kconfig | 9 +
> drivers/media/platform/Makefile | 2 +
> drivers/media/platform/sh_veu.c | 1306
> +++++++++++++++++++++++++++++++++++++++
> 3 files changed, 1317 insertions(+), 0 deletions(-)
> create mode 100644 drivers/media/platform/sh_veu.c
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index f588d62..6f08746 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -190,6 +190,15 @@ config VIDEO_SAMSUNG_EXYNOS_GSC
> help
> This is a v4l2 driver for Samsung EXYNOS5 SoC G-Scaler.
>
> +config VIDEO_SH_VEU
> + tristate "SuperH VEU mem2mem video processing driver"
> + depends on VIDEO_DEV && VIDEO_V4L2
> + select VIDEOBUF2_DMA_CONTIG
> + select V4L2_MEM2MEM_DEV
> + help
> + Support for the Video Engine Unit (VEU) on SuperH and
> + SH-Mobile SoCs.
> +
> endif # V4L_MEM2MEM_DRIVERS
>
> menuconfig V4L_TEST_DRIVERS
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index baaa550..46669f6 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -27,6 +27,8 @@ obj-$(CONFIG_VIDEO_CODA) += coda.o
>
> obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o
>
> +obj-$(CONFIG_VIDEO_SH_VEU) += sh_veu.o
> +
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/
> diff --git a/drivers/media/platform/sh_veu.c b/drivers/media/platform/sh_veu.c
> new file mode 100644
> index 0000000..dbb773b
> --- /dev/null
> +++ b/drivers/media/platform/sh_veu.c
> @@ -0,0 +1,1306 @@
> +/*
> + * sh-mobile VEU mem2mem driver
> + *
> + * Copyright (C) 2012 Renesas Electronics Corporation
> + * Author: Guennadi Liakhovetski, <g.liakhovet...@gmx.de>
> + * Copyright (C) 2008 Magnus Damm
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the version 2 of the GNU General Public License as
> + * published by the Free Software Foundation
> + */
> +
> +#include <linux/fs.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/videodev2.h>
> +
> +#include <media/v4l2-dev.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-mem2mem.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +#define VEU_STR 0x00 /* start register */
> +#define VEU_SWR 0x10 /* src: line length */
> +#define VEU_SSR 0x14 /* src: image size */
> +#define VEU_SAYR 0x18 /* src: y/rgb plane address */
> +#define VEU_SACR 0x1c /* src: c plane address */
> +#define VEU_BSSR 0x20 /* bundle mode register */
> +#define VEU_EDWR 0x30 /* dst: line length */
> +#define VEU_DAYR 0x34 /* dst: y/rgb plane address */
> +#define VEU_DACR 0x38 /* dst: c plane address */
> +#define VEU_TRCR 0x50 /* transform control */
> +#define VEU_RFCR 0x54 /* resize scale */
> +#define VEU_RFSR 0x58 /* resize clip */
> +#define VEU_ENHR 0x5c /* enhance */
> +#define VEU_FMCR 0x70 /* filter mode */
> +#define VEU_VTCR 0x74 /* lowpass vertical */
> +#define VEU_HTCR 0x78 /* lowpass horizontal */
> +#define VEU_APCR 0x80 /* color match */
> +#define VEU_ECCR 0x84 /* color replace */
> +#define VEU_AFXR 0x90 /* fixed mode */
> +#define VEU_SWPR 0x94 /* swap */
> +#define VEU_EIER 0xa0 /* interrupt mask */
> +#define VEU_EVTR 0xa4 /* interrupt event */
> +#define VEU_STAR 0xb0 /* status */
> +#define VEU_BSRR 0xb4 /* reset */
> +
> +#define VEU_MCR00 0x200 /* color conversion matrix coefficient 00 */
> +#define VEU_MCR01 0x204 /* color conversion matrix coefficient 01 */
> +#define VEU_MCR02 0x208 /* color conversion matrix coefficient 02 */
> +#define VEU_MCR10 0x20c /* color conversion matrix coefficient 10 */
> +#define VEU_MCR11 0x210 /* color conversion matrix coefficient 11 */
> +#define VEU_MCR12 0x214 /* color conversion matrix coefficient 12 */
> +#define VEU_MCR20 0x218 /* color conversion matrix coefficient 20 */
> +#define VEU_MCR21 0x21c /* color conversion matrix coefficient 21 */
> +#define VEU_MCR22 0x220 /* color conversion matrix coefficient 22 */
> +#define VEU_COFFR 0x224 /* color conversion offset */
> +#define VEU_CBR 0x228 /* color conversion clip */
> +
> +/*
> + * 4092x4092 max size is the normal case. In some cases it can be reduced to
> + * 2048x2048, in other cases it can be 4092x8188 or even 8188x8188.
> + */
> +#define MAX_W 4092
> +#define MAX_H 4092
> +#define MIN_W 8
> +#define MIN_H 8
> +#define ALIGN_W 4
> +
> +/* 3 buffers of 2048 x 1536 - 3 megapixels @ 16bpp */
> +#define VIDEO_MEM_LIMIT ALIGN(2048 * 1536 * 2 * 3, 1024 * 1024)
> +
> +#define MEM2MEM_DEF_TRANSLEN 1
> +
> +struct sh_veu_dev;
> +
> +struct sh_veu_file {
> + struct sh_veu_dev *veu_dev;
> + bool cfg_needed;
> +};
> +
> +struct sh_veu_format {
> + char *name;
> + u32 fourcc;
> + unsigned int depth;
> + unsigned int ydepth;
> +};
> +
> +/* video data format */
> +struct sh_veu_vfmt {
> + /* Replace with v4l2_rect */
> + struct v4l2_rect frame;
> + unsigned int bytesperline;
> + unsigned int offset_y;
> + unsigned int offset_c;
> + const struct sh_veu_format *fmt;
> +};
> +
> +struct sh_veu_dev {
> + struct v4l2_device v4l2_dev;
> + struct video_device *vdev;
> + struct v4l2_m2m_dev *m2m_dev;
> + struct device *dev;
> + struct v4l2_m2m_ctx *m2m_ctx;
> + struct sh_veu_vfmt vfmt_out;
> + struct sh_veu_vfmt vfmt_in;
> + /* Only single user per direction so far */
> + struct sh_veu_file *capture;
> + struct sh_veu_file *output;
> + struct mutex fop_lock;
> + void __iomem *base;
> + struct vb2_alloc_ctx *alloc_ctx;
> + spinlock_t lock;
> + bool is_2h;
> + unsigned int xaction;
> + bool aborting;
> +};
> +
> +enum sh_veu_fmt_idx {
> + SH_VEU_FMT_NV12,
> + SH_VEU_FMT_NV16,
> + SH_VEU_FMT_NV24,
> + SH_VEU_FMT_RGB332,
> + SH_VEU_FMT_RGB444,
> + SH_VEU_FMT_RGB565,
> + SH_VEU_FMT_RGB666,
> + SH_VEU_FMT_RGB24,
> +};
> +
> +#define VGA_WIDTH 640
> +#define VGA_HEIGHT 480
> +
> +#define DEFAULT_IN_WIDTH VGA_WIDTH
> +#define DEFAULT_IN_HEIGHT VGA_HEIGHT
> +#define DEFAULT_IN_FMTIDX SH_VEU_FMT_NV12
> +#define DEFAULT_OUT_WIDTH VGA_WIDTH
> +#define DEFAULT_OUT_HEIGHT VGA_HEIGHT
> +#define DEFAULT_OUT_FMTIDX SH_VEU_FMT_RGB565
> +
> +/*
> + * Alignment: Y-plane should be 4-byte aligned for NV12 and NV16, and 8-byte
> + * aligned for NV24.
> + */
> +static const struct sh_veu_format sh_veu_fmt[] = {
> + [SH_VEU_FMT_NV12] = { .ydepth = 8, .depth = 12, .name = "NV12",
> .fourcc = V4L2_PIX_FMT_NV12 },
> + [SH_VEU_FMT_NV16] = { .ydepth = 8, .depth = 16, .name = "NV16",
> .fourcc = V4L2_PIX_FMT_NV16 },
> + [SH_VEU_FMT_NV24] = { .ydepth = 8, .depth = 24, .name = "NV24",
> .fourcc = V4L2_PIX_FMT_NV24 },
> + [SH_VEU_FMT_RGB332] = { .ydepth = 8, .depth = 8, .name = "RGB332",
> .fourcc = V4L2_PIX_FMT_RGB332 },
> + [SH_VEU_FMT_RGB444] = { .ydepth = 16, .depth = 16, .name = "RGB444",
> .fourcc = V4L2_PIX_FMT_RGB444 },
> + [SH_VEU_FMT_RGB565] = { .ydepth = 16, .depth = 16, .name = "RGB565",
> .fourcc = V4L2_PIX_FMT_RGB565 },
> + [SH_VEU_FMT_RGB666] = { .ydepth = 32, .depth = 32, .name = "BGR666",
> .fourcc = V4L2_PIX_FMT_BGR666 },
> + [SH_VEU_FMT_RGB24] = { .ydepth = 24, .depth = 24, .name = "RGB24",
> .fourcc = V4L2_PIX_FMT_RGB24 },
> +};
> +
> +#define DEFAULT_IN_VFMT (struct sh_veu_vfmt){
> \
> + .frame = {
> \
> + .width = VGA_WIDTH,
> \
> + .height = VGA_HEIGHT,
> \
> + },
> \
> + .bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_IN_FMTIDX].ydepth) >>
> 3, \
> + .fmt = &sh_veu_fmt[DEFAULT_IN_FMTIDX],
> \
> +}
> +
> +#define DEFAULT_OUT_VFMT (struct sh_veu_vfmt){
> \
> + .frame = {
> \
> + .width = VGA_WIDTH,
> \
> + .height = VGA_HEIGHT,
> \
> + },
> \
> + .bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_OUT_FMTIDX].ydepth) >>
> 3, \
> + .fmt = &sh_veu_fmt[DEFAULT_OUT_FMTIDX],
> \
> +}
> +
> +/*
> + * TODO: add support for further output formats:
> + * SH_VEU_FMT_NV12,
> + * SH_VEU_FMT_NV16,
> + * SH_VEU_FMT_NV24,
> + * SH_VEU_FMT_RGB332,
> + * SH_VEU_FMT_RGB444,
> + * SH_VEU_FMT_RGB666,
> + * SH_VEU_FMT_RGB24,
> + */
> +
> +static const int sh_veu_fmt_out[] = {
> + SH_VEU_FMT_RGB565,
> +};
> +
> +/*
> + * TODO: add support for further input formats:
> + * SH_VEU_FMT_NV16,
> + * SH_VEU_FMT_NV24,
> + * SH_VEU_FMT_RGB565,
> + * SH_VEU_FMT_RGB666,
> + * SH_VEU_FMT_RGB24,
> + */
> +static const int sh_veu_fmt_in[] = {
> + SH_VEU_FMT_NV12,
> +};
> +
> +static enum v4l2_colorspace sh_veu_4cc2cspace(u32 fourcc)
> +{
> + switch (fourcc) {
> + default:
> + BUG();
> + case V4L2_PIX_FMT_NV12:
> + case V4L2_PIX_FMT_NV16:
> + case V4L2_PIX_FMT_NV24:
> + return V4L2_COLORSPACE_JPEG;
> + case V4L2_PIX_FMT_RGB332:
> + case V4L2_PIX_FMT_RGB444:
> + case V4L2_PIX_FMT_RGB565:
> + case V4L2_PIX_FMT_BGR666:
> + case V4L2_PIX_FMT_RGB24:
> + return V4L2_COLORSPACE_SRGB;
> + }
> +}
> +
> +static u32 sh_veu_reg_read(struct sh_veu_dev *veu, unsigned int reg)
> +{
> + return ioread32(veu->base + reg);
> +}
> +
> +static void sh_veu_reg_write(struct sh_veu_dev *veu, unsigned int reg,
> + u32 value)
> +{
> + iowrite32(value, veu->base + reg);
> +}
> +
> + /* ========== mem2mem callbacks ========== */
> +
> +static void sh_veu_job_abort(void *priv)
> +{
> + struct sh_veu_dev *veu = priv;
> +
> + /* Will cancel the transaction in the next interrupt handler */
> + veu->aborting = true;
> +}
> +
> +static void sh_veu_lock(void *priv)
> +{
> + struct sh_veu_dev *veu = priv;
> +
> + mutex_lock(&veu->fop_lock);
> +}
> +
> +static void sh_veu_unlock(void *priv)
> +{
> + struct sh_veu_dev *veu = priv;
> +
> + mutex_unlock(&veu->fop_lock);
> +}
> +
> +static void sh_veu_process(struct sh_veu_dev *veu,
> + struct vb2_buffer *src_buf,
> + struct vb2_buffer *dst_buf)
> +{
> + dma_addr_t addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
> +
> + sh_veu_reg_write(veu, VEU_DAYR, addr + veu->vfmt_out.offset_y);
> + sh_veu_reg_write(veu, VEU_DACR, veu->vfmt_out.offset_c ?
> + addr + veu->vfmt_out.offset_c : 0);
> + dev_dbg(veu->dev, "%s(): dst base %x, y: %x, c: %x\n", __func__,
> + addr, veu->vfmt_out.offset_y, veu->vfmt_out.offset_c);
> +
> + addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
> + sh_veu_reg_write(veu, VEU_SAYR, addr + veu->vfmt_in.offset_y);
> + sh_veu_reg_write(veu, VEU_SACR, veu->vfmt_in.offset_c ?
> + addr + veu->vfmt_in.offset_c : 0);
> + dev_dbg(veu->dev, "%s(): src base %x, y: %x, c: %x\n", __func__,
> + addr, veu->vfmt_in.offset_y, veu->vfmt_in.offset_c);
> +
> + sh_veu_reg_write(veu, VEU_STR, 1);
> +
> + sh_veu_reg_write(veu, VEU_EIER, 1); /* enable interrupt in VEU */
> +}
> +
> +/**
> + * sh_veu_device_run() - prepares and starts the device
> + *
> + * This will be called by the framework when it decides to schedule a
> particular
> + * instance.
> + */
> +static void sh_veu_device_run(void *priv)
> +{
> + struct sh_veu_dev *veu = priv;
> + struct vb2_buffer *src_buf, *dst_buf;
> +
> + src_buf = v4l2_m2m_next_src_buf(veu->m2m_ctx);
> + dst_buf = v4l2_m2m_next_dst_buf(veu->m2m_ctx);
> +
> + if (src_buf && dst_buf)
> + sh_veu_process(veu, src_buf, dst_buf);
> +}
> +
> + /* ========== video ioctls ========== */
> +
> +static bool sh_veu_is_streamer(struct sh_veu_dev *veu, struct sh_veu_file
> *veu_file,
> + enum v4l2_buf_type type)
> +{
> + return (type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
> + veu_file == veu->capture) ||
> + (type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
> + veu_file == veu->output);
> +}
> +
> +static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
> + struct vb2_queue *dst_vq);
> +
> +/*
> + * It is not unusual to have video nodes open()ed multiple times. While some
> + * V4L2 operations are non-intrusive, like querying formats and various
> + * parameters, others, like setting formats, starting and stopping streaming,
> + * queuing and dequeuing buffers, directly affect hardware configuration and
> /
> + * or execution. This function verifies availability of the requested
> interface
> + * and, if available, reserves it for the requesting user.
> + */
> +static int sh_veu_stream_init(struct sh_veu_dev *veu, struct sh_veu_file
> *veu_file,
> + enum v4l2_buf_type type)
> +{
> + struct sh_veu_file **stream;
> +
> + switch (type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + stream = &veu->capture;
> + break;
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + stream = &veu->output;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + if (*stream == veu_file)
> + return 0;
> +
> + if (*stream)
> + return -EBUSY;
> +
> + *stream = veu_file;
> +
> + return 0;
> +}
> +
> +static int sh_veu_context_init(struct sh_veu_dev *veu)
> +{
> + if (veu->m2m_ctx)
> + return 0;
> +
> + veu->m2m_ctx = v4l2_m2m_ctx_init(veu->m2m_dev, veu,
> + sh_veu_queue_init);
> +
> + if (IS_ERR(veu->m2m_ctx))
> + return PTR_ERR(veu->m2m_ctx);
> +
> + return 0;
> +}
> +
> +static int sh_veu_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + strlcpy(cap->driver, "sh-veu", sizeof(cap->driver));
> + strlcpy(cap->card, "sh-mobile VEU", sizeof(cap->card));
> + strlcpy(cap->bus_info, "platform:sh-veu", sizeof(cap->bus_info));
> + cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
> +
> + return 0;
> +}
> +
> +static int sh_veu_enum_fmt(struct v4l2_fmtdesc *f, const int *fmt, int
> fmt_num)
> +{
> + if (f->index >= fmt_num)
> + return -EINVAL;
> +
> + strlcpy(f->description, sh_veu_fmt[fmt[f->index]].name,
> sizeof(f->description));
> + f->pixelformat = sh_veu_fmt[fmt[f->index]].fourcc;
> + return 0;
> +}
> +
> +static int sh_veu_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + return -EINVAL;
This check is not necessary, the core will do that for you.
> + return sh_veu_enum_fmt(f, sh_veu_fmt_out, ARRAY_SIZE(sh_veu_fmt_out));
> +}
> +
> +static int sh_veu_enum_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + if (f->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
> + return -EINVAL;
This check is not necessary, the core will do that for you.
> + return sh_veu_enum_fmt(f, sh_veu_fmt_in, ARRAY_SIZE(sh_veu_fmt_in));
> +}
> +
> +static struct sh_veu_vfmt *sh_veu_get_vfmt(struct sh_veu_dev *veu,
> + enum v4l2_buf_type type)
> +{
> + switch (type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + return &veu->vfmt_out;
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + return &veu->vfmt_in;
> + default:
> + return NULL;
> + }
> +}
> +
> +static int sh_veu_g_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
> +{
> + struct v4l2_pix_format *pix = &f->fmt.pix;
> + struct sh_veu_dev *veu = veu_file->veu_dev;
> + struct sh_veu_vfmt *vfmt;
> +
> + vfmt = sh_veu_get_vfmt(veu, f->type);
> +
> + pix->width = vfmt->frame.width;
> + pix->height = vfmt->frame.height;
> + pix->field = V4L2_FIELD_NONE;
> + pix->pixelformat = vfmt->fmt->fourcc;
> + pix->colorspace = sh_veu_4cc2cspace(pix->pixelformat);
> + pix->bytesperline = vfmt->bytesperline;
> + pix->sizeimage = vfmt->bytesperline * pix->height *
> + vfmt->fmt->depth / vfmt->fmt->ydepth;
> + pix->priv = 0;
> + dev_dbg(veu->dev, "%s(): type: %d, size %u @ %ux%u, fmt %x\n", __func__,
> + f->type, pix->sizeimage, pix->width, pix->height,
> pix->pixelformat);
> +
> + return 0;
> +}
> +
> +static int sh_veu_g_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return sh_veu_g_fmt(priv, f);
> +}
> +
> +static int sh_veu_g_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return sh_veu_g_fmt(priv, f);
> +}
> +
> +static int sh_veu_try_fmt(struct v4l2_format *f, const struct sh_veu_format
> *fmt)
> +{
> + struct v4l2_pix_format *pix = &f->fmt.pix;
> + unsigned int y_bytes_used;
> +
> + /*
> + * V4L2 specification suggests, that the driver should correct the
> + * format struct if any of the dimensions is unsupported
> + */
> + switch (pix->field) {
> + default:
> + case V4L2_FIELD_ANY:
> + pix->field = V4L2_FIELD_NONE;
> + /* fall through: continue handling V4L2_FIELD_NONE */
> + case V4L2_FIELD_NONE:
> + break;
> + }
> +
> + v4l_bound_align_image(&pix->width, MIN_W, MAX_W, ALIGN_W,
> + &pix->height, MIN_H, MAX_H, 0, 0);
> +
> + y_bytes_used = (pix->width * fmt->ydepth) >> 3;
> +
> + if (pix->bytesperline < y_bytes_used)
> + pix->bytesperline = y_bytes_used;
> + pix->sizeimage = pix->height * pix->bytesperline * fmt->depth /
> fmt->ydepth;
> +
> + pix->pixelformat = fmt->fourcc;
> + pix->colorspace = sh_veu_4cc2cspace(pix->pixelformat);
> + pix->priv = 0;
> +
> + pr_debug("%s(): type: %d, size %u\n", __func__, f->type,
> pix->sizeimage);
> +
> + return 0;
> +}
> +
> +static const struct sh_veu_format *sh_veu_find_fmt(const struct v4l2_format
> *f)
> +{
> + const int *fmt;
> + int i, n, dflt;
> +
> + pr_debug("%s(%d;%d)\n", __func__, f->type, f->fmt.pix.field);
> +
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + fmt = sh_veu_fmt_out;
> + n = ARRAY_SIZE(sh_veu_fmt_out);
> + dflt = DEFAULT_OUT_FMTIDX;
> + break;
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + default:
> + fmt = sh_veu_fmt_in;
> + n = ARRAY_SIZE(sh_veu_fmt_in);
> + dflt = DEFAULT_IN_FMTIDX;
> + break;
> + }
> +
> + for (i = 0; i < n; i++)
> + if (sh_veu_fmt[fmt[i]].fourcc == f->fmt.pix.pixelformat)
> + return &sh_veu_fmt[fmt[i]];
> +
> + return &sh_veu_fmt[dflt];
> +}
> +
> +static int sh_veu_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + const struct sh_veu_format *fmt;
> +
> + fmt = sh_veu_find_fmt(f);
> + if (!fmt)
> + /* wrong buffer type */
> + return -EINVAL;
> +
> + return sh_veu_try_fmt(f, fmt);
> +}
> +
> +static int sh_veu_try_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + const struct sh_veu_format *fmt;
> +
> + fmt = sh_veu_find_fmt(f);
> + if (!fmt)
> + /* wrong buffer type */
> + return -EINVAL;
> +
> + return sh_veu_try_fmt(f, fmt);
> +}
> +
> +static void sh_veu_colour_offset(struct sh_veu_dev *veu, struct sh_veu_vfmt
> *vfmt)
> +{
> + /* dst_left and dst_top validity will be verified in CROP / COMPOSE */
> + unsigned int left = vfmt->frame.left & ~0x03;
> + unsigned int top = vfmt->frame.top;
> + dma_addr_t offset = ((left * veu->vfmt_out.fmt->depth) >> 3) +
> + top * veu->vfmt_out.bytesperline;
> + unsigned int y_line;
> +
> + vfmt->offset_y = offset;
> +
> + switch (vfmt->fmt->fourcc) {
> + case V4L2_PIX_FMT_NV12:
> + case V4L2_PIX_FMT_NV16:
> + case V4L2_PIX_FMT_NV24:
> + y_line = ALIGN(vfmt->frame.width, 16);
> + vfmt->offset_c = offset + y_line * vfmt->frame.height;
> + break;
> + case V4L2_PIX_FMT_RGB332:
> + case V4L2_PIX_FMT_RGB444:
> + case V4L2_PIX_FMT_RGB565:
> + case V4L2_PIX_FMT_BGR666:
> + case V4L2_PIX_FMT_RGB24:
> + vfmt->offset_c = 0;
> + break;
> + default:
> + BUG();
> + }
> +}
> +
> +static int sh_veu_s_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
> +{
> + struct v4l2_pix_format *pix = &f->fmt.pix;
> + struct sh_veu_dev *veu = veu_file->veu_dev;
> + struct sh_veu_vfmt *vfmt;
> + struct vb2_queue *vq;
> + int ret = sh_veu_context_init(veu);
> + if (ret < 0)
> + return ret;
> +
> + vq = v4l2_m2m_get_vq(veu->m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + if (vb2_is_busy(vq)) {
> + v4l2_err(&veu_file->veu_dev->v4l2_dev, "%s queue busy\n",
> __func__);
> + return -EBUSY;
> + }
> +
> + vfmt = sh_veu_get_vfmt(veu, f->type);
> + /* called after try_fmt(), hence vfmt != NULL. Implicit BUG_ON() below
> */
> +
> + vfmt->fmt = sh_veu_find_fmt(f);
> + /* vfmt->fmt != NULL following the same argument as above */
> + vfmt->frame.width = pix->width;
> + vfmt->frame.height = pix->height;
> + vfmt->bytesperline = pix->bytesperline;
> +
> + sh_veu_colour_offset(veu, vfmt);
> +
> + /*
> + * We could also verify and require configuration only if any parameters
> + * actually have changed, but it is unlikely, that the user requests the
> + * same configuration several times without closing the device.
> + */
> + veu_file->cfg_needed = true;
> +
> + dev_dbg(veu->dev,
> + "Setting format for type %d, wxh: %dx%d, fmt: %x\n",
> + f->type, pix->width, pix->height, vfmt->fmt->fourcc);
> +
> + return 0;
> +}
> +
> +static int sh_veu_s_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret = sh_veu_try_fmt_vid_cap(file, priv, f);
> + if (ret)
> + return ret;
> +
> + return sh_veu_s_fmt(priv, f);
> +}
> +
> +static int sh_veu_s_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret = sh_veu_try_fmt_vid_out(file, priv, f);
> + if (ret)
> + return ret;
> +
> + return sh_veu_s_fmt(priv, f);
> +}
> +
> +static int sh_veu_reqbufs(struct file *file, void *priv,
> + struct v4l2_requestbuffers *reqbufs)
> +{
> + struct sh_veu_file *veu_file = priv;
> + struct sh_veu_dev *veu = veu_file->veu_dev;
> + int ret = sh_veu_context_init(veu);
> + if (ret < 0)
> + return ret;
> +
> + ret = sh_veu_stream_init(veu, veu_file, reqbufs->type);
> + if (ret < 0)
> + return ret;
> +
> + return v4l2_m2m_reqbufs(file, veu->m2m_ctx, reqbufs);
> +}
> +
> +static int sh_veu_querybuf(struct file *file, void *priv,
> + struct v4l2_buffer *buf)
> +{
> + struct sh_veu_file *veu_file = priv;
> +
> + if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
> + return -EBUSY;
> +
> + return v4l2_m2m_querybuf(file, veu_file->veu_dev->m2m_ctx, buf);
> +}
> +
> +static int sh_veu_qbuf(struct file *file, void *priv, struct v4l2_buffer
> *buf)
> +{
> + struct sh_veu_file *veu_file = priv;
> +
> + dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
> + if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
> + return -EBUSY;
> +
> + return v4l2_m2m_qbuf(file, veu_file->veu_dev->m2m_ctx, buf);
> +}
> +
> +static int sh_veu_dqbuf(struct file *file, void *priv, struct v4l2_buffer
> *buf)
> +{
> + struct sh_veu_file *veu_file = priv;
> +
> + dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
> + if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
> + return -EBUSY;
> +
> + return v4l2_m2m_dqbuf(file, veu_file->veu_dev->m2m_ctx, buf);
> +}
> +
> +static void sh_veu_calc_scale(struct sh_veu_dev *veu,
> + int size_in, int size_out, int crop_out,
> + u32 *mant, u32 *frac, u32 *rep)
> +{
> + u32 fixpoint;
> +
> + /* calculate FRAC and MANT */
> + *rep = *mant = *frac = 0;
> +
> + if (size_in == size_out) {
> + if (crop_out != size_out)
> + *mant = 1; /* needed for cropping */
> + return;
> + }
> +
> + /* VEU2H special upscale */
> + if (veu->is_2h && size_out > size_in) {
> + u32 fixpoint = (4096 * size_in) / size_out;
> + *mant = fixpoint / 4096;
> + *frac = (fixpoint - (*mant * 4096)) & ~0x07;
> +
> + switch (*frac) {
> + case 0x800:
> + *rep = 1;
> + break;
> + case 0x400:
> + *rep = 3;
> + break;
> + case 0x200:
> + *rep = 7;
> + break;
> + }
> + if (*rep)
> + return;
> + }
> +
> + fixpoint = (4096 * (size_in - 1)) / (size_out + 1);
> + *mant = fixpoint / 4096;
> + *frac = fixpoint - (*mant * 4096);
> +
> + if (*frac & 0x07) {
> + /*
> + * FIXME: do we really have to round down twice in the
> + * up-scaling case?
> + */
> + *frac &= ~0x07;
> + if (size_out > size_in)
> + *frac -= 8; /* round down if scaling up */
> + else
> + *frac += 8; /* round up if scaling down */
> + }
> +}
> +
> +static unsigned long sh_veu_scale_v(struct sh_veu_dev *veu,
> + int size_in, int size_out, int crop_out)
> +{
> + u32 mant, frac, value, rep;
> +
> + sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
> +
> + /* set scale */
> + value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff0000) |
> + (((mant << 12) | frac) << 16);
> +
> + sh_veu_reg_write(veu, VEU_RFCR, value);
> +
> + /* set clip */
> + value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff0000) |
> + (((rep << 12) | crop_out) << 16);
> +
> + sh_veu_reg_write(veu, VEU_RFSR, value);
> +
> + return ALIGN((size_in * crop_out) / size_out, 4);
> +}
> +
> +static unsigned long sh_veu_scale_h(struct sh_veu_dev *veu,
> + int size_in, int size_out, int crop_out)
> +{
> + u32 mant, frac, value, rep;
> +
> + sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
> +
> + /* set scale */
> + value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff) |
> + (mant << 12) | frac;
> +
> + sh_veu_reg_write(veu, VEU_RFCR, value);
> +
> + /* set clip */
> + value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff) |
> + (rep << 12) | crop_out;
> +
> + sh_veu_reg_write(veu, VEU_RFSR, value);
> +
> + return ALIGN((size_in * crop_out) / size_out, 4);
> +}
> +
> +static void sh_veu_configure(struct sh_veu_dev *veu)
> +{
> + u32 src_width, src_stride, src_height;
> + u32 dst_width, dst_stride, dst_height;
> + u32 real_w, real_h;
> +
> + /* reset VEU */
> + sh_veu_reg_write(veu, VEU_BSRR, 0x100);
> +
> + src_width = veu->vfmt_in.frame.width;
> + src_height = veu->vfmt_in.frame.height;
> + src_stride = ALIGN(veu->vfmt_in.frame.width, 16);
> +
> + dst_width = real_w = veu->vfmt_out.frame.width;
> + dst_height = real_h = veu->vfmt_out.frame.height;
> + /* Datasheet is unclear - whether it's always number of bytes or not */
> + dst_stride = veu->vfmt_out.bytesperline;
> +
> + /*
> + * So far real_w == dst_width && real_h == dst_height, but it wasn't
> + * necessarily the case in the original vidix driver, so, it may change
> + * here in the future too.
> + */
> + src_width = sh_veu_scale_h(veu, src_width, real_w, dst_width);
> + src_height = sh_veu_scale_v(veu, src_height, real_h, dst_height);
> +
> + sh_veu_reg_write(veu, VEU_SWR, src_stride);
> + sh_veu_reg_write(veu, VEU_SSR, src_width | (src_height << 16));
> + sh_veu_reg_write(veu, VEU_BSSR, 0); /* not using bundle mode */
> +
> + sh_veu_reg_write(veu, VEU_EDWR, dst_stride);
> + sh_veu_reg_write(veu, VEU_DACR, 0); /* unused for RGB */
> +
> + sh_veu_reg_write(veu, VEU_SWPR, 0x67);
> + sh_veu_reg_write(veu, VEU_TRCR, (6 << 16) | (0 << 14) | 2 | 4);
> +
> + if (veu->is_2h) {
> + sh_veu_reg_write(veu, VEU_MCR00, 0x0cc5);
> + sh_veu_reg_write(veu, VEU_MCR01, 0x0950);
> + sh_veu_reg_write(veu, VEU_MCR02, 0x0000);
> +
> + sh_veu_reg_write(veu, VEU_MCR10, 0x397f);
> + sh_veu_reg_write(veu, VEU_MCR11, 0x0950);
> + sh_veu_reg_write(veu, VEU_MCR12, 0x3ccd);
> +
> + sh_veu_reg_write(veu, VEU_MCR20, 0x0000);
> + sh_veu_reg_write(veu, VEU_MCR21, 0x0950);
> + sh_veu_reg_write(veu, VEU_MCR22, 0x1023);
> +
> + sh_veu_reg_write(veu, VEU_COFFR, 0x00800010);
> + }
> +}
> +
> +static int sh_veu_streamon(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct sh_veu_file *veu_file = priv;
> +
> + if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
> + return -EBUSY;
> +
> + if (veu_file->cfg_needed) {
> + struct sh_veu_dev *veu = veu_file->veu_dev;
> + veu_file->cfg_needed = false;
> + sh_veu_configure(veu_file->veu_dev);
> + veu->xaction = 0;
> + veu->aborting = false;
> + }
> +
> + return v4l2_m2m_streamon(file, veu_file->veu_dev->m2m_ctx, type);
> +}
> +
> +static int sh_veu_streamoff(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct sh_veu_file *veu_file = priv;
> +
> + if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
> + return -EBUSY;
> +
> + return v4l2_m2m_streamoff(file, veu_file->veu_dev->m2m_ctx, type);
> +}
> +
> +static const struct v4l2_ioctl_ops sh_veu_ioctl_ops = {
> + .vidioc_querycap = sh_veu_querycap,
> +
> + .vidioc_enum_fmt_vid_cap = sh_veu_enum_fmt_vid_cap,
> + .vidioc_g_fmt_vid_cap = sh_veu_g_fmt_vid_cap,
> + .vidioc_try_fmt_vid_cap = sh_veu_try_fmt_vid_cap,
> + .vidioc_s_fmt_vid_cap = sh_veu_s_fmt_vid_cap,
> +
> + .vidioc_enum_fmt_vid_out = sh_veu_enum_fmt_vid_out,
> + .vidioc_g_fmt_vid_out = sh_veu_g_fmt_vid_out,
> + .vidioc_try_fmt_vid_out = sh_veu_try_fmt_vid_out,
> + .vidioc_s_fmt_vid_out = sh_veu_s_fmt_vid_out,
> +
> + .vidioc_reqbufs = sh_veu_reqbufs,
> + .vidioc_querybuf = sh_veu_querybuf,
> +
> + .vidioc_qbuf = sh_veu_qbuf,
> + .vidioc_dqbuf = sh_veu_dqbuf,
> +
> + .vidioc_streamon = sh_veu_streamon,
> + .vidioc_streamoff = sh_veu_streamoff,
> +};
> +
> + /* ========== Queue operations ========== */
> +
> +static int sh_veu_queue_setup(struct vb2_queue *vq,
> + const struct v4l2_format *f,
> + unsigned int *nbuffers, unsigned int *nplanes,
> + unsigned int sizes[], void *alloc_ctxs[])
> +{
> + struct sh_veu_dev *veu = vb2_get_drv_priv(vq);
> + struct sh_veu_vfmt *vfmt;
> + unsigned int size, count = *nbuffers;
> +
> + if (f) {
> + const struct v4l2_pix_format *pix = &f->fmt.pix;
> + const struct sh_veu_format *fmt = sh_veu_find_fmt(f);
> + struct v4l2_format ftmp = *f;
> +
> + if (fmt->fourcc != pix->pixelformat)
> + return -EINVAL;
> + sh_veu_try_fmt(&ftmp, fmt);
> + if (ftmp.fmt.pix.width != pix->width ||
> + ftmp.fmt.pix.height != pix->height)
> + return -EINVAL;
> + size = pix->bytesperline ? pix->bytesperline * pix->height :
> + pix->width * pix->height * fmt->depth >> 3;
> + } else {
> + vfmt = sh_veu_get_vfmt(veu, vq->type);
> + size = vfmt->bytesperline * vfmt->frame.height;
> + }
> +
> + if (count < 2)
> + *nbuffers = count = 2;
> +
> + if (size * count > VIDEO_MEM_LIMIT) {
> + count = VIDEO_MEM_LIMIT / size;
> + *nbuffers = count;
> + }
> +
> + *nplanes = 1;
> + sizes[0] = size;
> + alloc_ctxs[0] = veu->alloc_ctx;
> +
> + dev_dbg(veu->dev, "get %d buffer(s) of size %d each.\n", count, size);
> +
> + return 0;
> +}
> +
> +static int sh_veu_buf_prepare(struct vb2_buffer *vb)
> +{
> + struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
> + struct sh_veu_vfmt *vfmt;
> + unsigned int sizeimage;
> +
> + vfmt = sh_veu_get_vfmt(veu, vb->vb2_queue->type);
> + sizeimage = vfmt->bytesperline * vfmt->frame.height *
> + vfmt->fmt->depth / vfmt->fmt->ydepth;
> +
> + if (vb2_plane_size(vb, 0) < sizeimage) {
> + dev_dbg(veu->dev, "%s data will not fit into plane (%lu <
> %u)\n",
> + __func__, vb2_plane_size(vb, 0), sizeimage);
> + return -EINVAL;
> + }
> +
> + vb2_set_plane_payload(vb, 0, sizeimage);
> +
> + return 0;
> +}
> +
> +static void sh_veu_buf_queue(struct vb2_buffer *vb)
> +{
> + struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
> + dev_dbg(veu->dev, "%s(%d)\n", __func__, vb->v4l2_buf.type);
> + v4l2_m2m_buf_queue(veu->m2m_ctx, vb);
> +}
> +
> +static void sh_veu_wait_prepare(struct vb2_queue *q)
> +{
> + sh_veu_unlock(vb2_get_drv_priv(q));
> +}
> +
> +static void sh_veu_wait_finish(struct vb2_queue *q)
> +{
> + sh_veu_lock(vb2_get_drv_priv(q));
> +}
> +
> +static const struct vb2_ops sh_veu_qops = {
> + .queue_setup = sh_veu_queue_setup,
> + .buf_prepare = sh_veu_buf_prepare,
> + .buf_queue = sh_veu_buf_queue,
> + .wait_prepare = sh_veu_wait_prepare,
> + .wait_finish = sh_veu_wait_finish,
> +};
> +
> +static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
> + struct vb2_queue *dst_vq)
> +{
> + 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 = priv;
> + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + src_vq->ops = &sh_veu_qops;
> + src_vq->mem_ops = &vb2_dma_contig_memops;
> +
> + ret = vb2_queue_init(src_vq);
> + if (ret < 0)
> + 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 = priv;
> + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + dst_vq->ops = &sh_veu_qops;
> + dst_vq->mem_ops = &vb2_dma_contig_memops;
> +
> + return vb2_queue_init(dst_vq);
> +}
> +
> + /* ========== File operations ========== */
> +
> +static int sh_veu_open(struct file *file)
> +{
> + struct sh_veu_dev *veu = video_drvdata(file);
> + struct sh_veu_file *veu_file;
> +
> + veu_file = kzalloc(sizeof(*veu_file), GFP_KERNEL);
> + if (!veu_file)
> + return -ENOMEM;
> +
> + veu_file->veu_dev = veu;
> + veu_file->cfg_needed = true;
> +
> + file->private_data = veu_file;
> +
> + pm_runtime_get_sync(veu->dev);
> +
> + dev_dbg(veu->dev, "Created instance %p\n", veu_file);
> +
> + return 0;
> +}
> +
> +static int sh_veu_release(struct file *file)
> +{
> + struct sh_veu_dev *veu = video_drvdata(file);
> + struct sh_veu_file *veu_file = file->private_data;
> +
> + dev_dbg(veu->dev, "Releasing instance %p\n", veu_file);
> +
> + pm_runtime_put(veu->dev);
> +
> + if (veu_file == veu->capture) {
> + veu->capture = NULL;
> + vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx,
> V4L2_BUF_TYPE_VIDEO_CAPTURE));
> + }
> +
> + if (veu_file == veu->output) {
> + veu->output = NULL;
> + vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx,
> V4L2_BUF_TYPE_VIDEO_OUTPUT));
> + }
> +
> + if (!veu->output && !veu->capture && veu->m2m_ctx) {
> + v4l2_m2m_ctx_release(veu->m2m_ctx);
> + veu->m2m_ctx = NULL;
> + }
> +
> + kfree(veu_file);
> +
> + return 0;
> +}
> +
> +static unsigned int sh_veu_poll(struct file *file,
> + struct poll_table_struct *wait)
> +{
> + struct sh_veu_file *veu_file = file->private_data;
> +
> + return v4l2_m2m_poll(file, veu_file->veu_dev->m2m_ctx, wait);
> +}
> +
> +static int sh_veu_mmap(struct file *file, struct vm_area_struct *vma)
> +{
> + struct sh_veu_file *veu_file = file->private_data;
> +
> + return v4l2_m2m_mmap(file, veu_file->veu_dev->m2m_ctx, vma);
> +}
> +
> +static const struct v4l2_file_operations sh_veu_fops = {
> + .owner = THIS_MODULE,
> + .open = sh_veu_open,
> + .release = sh_veu_release,
> + .poll = sh_veu_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = sh_veu_mmap,
> +};
> +
> +static const struct video_device sh_veu_videodev = {
> + .name = "sh-veu",
> + .fops = &sh_veu_fops,
> + .ioctl_ops = &sh_veu_ioctl_ops,
> + .minor = -1,
> + .release = video_device_release,
> + .vfl_dir = VFL_DIR_M2M,
> +};
> +
> +static const struct v4l2_m2m_ops sh_veu_m2m_ops = {
> + .device_run = sh_veu_device_run,
> + .job_abort = sh_veu_job_abort,
> +};
> +
> +static irqreturn_t sh_veu_bh(int irq, void *dev_id)
> +{
> + struct sh_veu_dev *veu = dev_id;
> +
> + if (veu->xaction == MEM2MEM_DEF_TRANSLEN || veu->aborting) {
> + v4l2_m2m_job_finish(veu->m2m_dev, veu->m2m_ctx);
> + veu->xaction = 0;
> + } else {
> + sh_veu_device_run(veu);
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t sh_veu_isr(int irq, void *dev_id)
> +{
> + struct sh_veu_dev *veu = dev_id;
> + struct vb2_buffer *dst;
> + struct vb2_buffer *src;
> + u32 status = sh_veu_reg_read(veu, VEU_EVTR);
> +
> + /* bundle read mode not used */
> + if (!(status & 1))
> + return IRQ_NONE;
> +
> + /* disable interrupt in VEU */
> + sh_veu_reg_write(veu, VEU_EIER, 0);
> + /* halt operation */
> + sh_veu_reg_write(veu, VEU_STR, 0);
> + /* ack int, write 0 to clear bits */
> + sh_veu_reg_write(veu, VEU_EVTR, status & ~1);
> +
> + /* conversion completed */
> + dst = v4l2_m2m_dst_buf_remove(veu->m2m_ctx);
> + src = v4l2_m2m_src_buf_remove(veu->m2m_ctx);
> + if (!src || !dst)
> + return IRQ_NONE;
> +
> + spin_lock(&veu->lock);
> + v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
> + v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
> + spin_unlock(&veu->lock);
> +
> + veu->xaction++;
> +
> + if (!veu->aborting)
> + return IRQ_WAKE_THREAD;
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int __devinit sh_veu_probe(struct platform_device *pdev)
> +{
> + struct sh_veu_dev *veu;
> + struct resource *reg_res, *region;
> + struct video_device *vdev;
> + int irq, ret;
> +
> + reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + irq = platform_get_irq(pdev, 0);
> +
> + if (!reg_res || irq <= 0) {
> + dev_err(&pdev->dev, "Insufficient VEU platform information.\n");
> + return -ENODEV;
> + }
> +
> + veu = kzalloc(sizeof(*veu), GFP_KERNEL);
> + if (!veu)
> + return -ENOMEM;
> +
> + veu->is_2h = resource_size(reg_res) == 0x22c;
> +
> + region = request_mem_region(reg_res->start, resource_size(reg_res),
> + pdev->name);
> + if (!region) {
> + dev_err(&pdev->dev, "VEU region already claimed\n");
> + ret = -EBUSY;
> + goto ereqmemreg;
> + }
> +
> + veu->base = ioremap(reg_res->start, resource_size(reg_res));
> + if (!veu->base) {
> + ret = -ENOMEM;
> + goto emap;
> + }
> +
> + ret = request_threaded_irq(irq, sh_veu_isr, sh_veu_bh, 0, "veu", veu);
> + if (ret < 0)
> + goto ereqirq;
> +
> + ret = v4l2_device_register(&pdev->dev, &veu->v4l2_dev);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Error registering v4l2 device\n");
> + goto ev4l2devreg;
> + }
> +
> + /* Allocate memory for video device */
> + vdev = video_device_alloc();
I always recommend embedding the video_device struct in the main device struct.
It saves this extra allocation and check.
> + if (vdev == NULL) {
> + ret = -ENOMEM;
> + goto evdevalloc;
> + }
> +
> + veu->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
> + if (IS_ERR(veu->alloc_ctx)) {
> + ret = PTR_ERR(veu->alloc_ctx);
> + goto einitctx;
> + }
> +
> + *vdev = sh_veu_videodev;
> + spin_lock_init(&veu->lock);
> + mutex_init(&veu->fop_lock);
> + vdev->lock = &veu->fop_lock;
> +
> + video_set_drvdata(vdev, veu);
> +
> + veu->dev = &pdev->dev;
> + veu->vfmt_out = DEFAULT_OUT_VFMT;
> + veu->vfmt_in = DEFAULT_IN_VFMT;
> +
> + pm_runtime_enable(&pdev->dev);
> + pm_runtime_resume(&pdev->dev);
> +
> + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
I would recommend doing this as the very last step of the probe. As soon as
the device node is created it can be used, and I don't what happens if it
is called when e.g. veu->vdev or m2m_dev isn't initialized yet.
> + if (ret < 0)
> + goto evidreg;
> +
> + veu->vdev = vdev;
> +
> + veu->m2m_dev = v4l2_m2m_init(&sh_veu_m2m_ops);
> + pm_runtime_suspend(&pdev->dev);
> + if (IS_ERR(veu->m2m_dev)) {
> + ret = PTR_ERR(veu->m2m_dev);
> + v4l2_err(&veu->v4l2_dev, "Failed to init mem2mem device: %d\n",
> ret);
> + goto em2minit;
> + }
> +
> + return ret;
> +
> +em2minit:
> + video_unregister_device(vdev);
> + /*
> + * We get here after a successful video_register_device(), so,
> + * video_device_release() will have been called by now.
> + */
> + vdev = NULL;
> +evidreg:
> + pm_runtime_disable(&pdev->dev);
> +einitctx:
> + if (vdev)
> + video_device_release(vdev);
> +evdevalloc:
> + v4l2_device_unregister(&veu->v4l2_dev);
> +ev4l2devreg:
> + free_irq(irq, veu);
> +ereqirq:
> + iounmap(veu->base);
> +emap:
> + release_mem_region(reg_res->start, resource_size(reg_res));
> +ereqmemreg:
> + kfree(veu);
> + return ret;
> +}
> +
> +static int __devexit sh_veu_remove(struct platform_device *pdev)
> +{
> + struct resource *reg_res;
> + struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
> + struct sh_veu_dev *veu = container_of(v4l2_dev,
> + struct sh_veu_dev, v4l2_dev);
> + int irq = platform_get_irq(pdev, 0);
> +
> + v4l2_m2m_release(veu->m2m_dev);
> + if (irq > 0)
> + free_irq(irq, veu);
> + pm_runtime_disable(&pdev->dev);
> + video_unregister_device(veu->vdev);
> + v4l2_device_unregister(&veu->v4l2_dev);
> + iounmap(veu->base);
> + reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (reg_res)
> + release_mem_region(reg_res->start, resource_size(reg_res));
> + kfree(veu);
> + return 0;
> +}
> +
> +static struct platform_driver __refdata sh_veu_pdrv = {
> + .remove = __devexit_p(sh_veu_remove),
> + .driver = {
> + .name = "sh_veu",
> + .owner = THIS_MODULE,
> + },
> +};
> +
> +static int __init sh_veu_init(void)
> +{
> + return platform_driver_probe(&sh_veu_pdrv, sh_veu_probe);
> +}
> +
> +static void __exit sh_veu_exit(void)
> +{
> + platform_driver_unregister(&sh_veu_pdrv);
> +}
> +
> +module_init(sh_veu_init);
> +module_exit(sh_veu_exit);
> +
> +MODULE_DESCRIPTION("sh-mobile VEU mem2mem driver");
> +MODULE_AUTHOR("Guennadi Liakhovetski, <g.liakhovet...@gmx.de>");
> +MODULE_LICENSE("GPL v2");
>
Regards,
Hans
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