Hi Philip,
A quick review:
On 07/16/2015 06:24 PM, Philipp Zabel wrote:
> From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
>
> Add video4linux API routines common to drivers for units that
> accept or provide video data via the i.MX IPU IDMAC channels,
> such as scaler or deinterlacer drivers.
>
> Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> ---
> drivers/media/platform/Kconfig | 2 +
> drivers/media/platform/Makefile | 1 +
> drivers/media/platform/imx/Kconfig | 2 +
> drivers/media/platform/imx/Makefile | 1 +
> drivers/media/platform/imx/imx-ipu.c | 313 +++++++++++++++++++++++++++++++++++
> drivers/media/platform/imx/imx-ipu.h | 35 ++++
A MAINTAINERS entry is needed.
> 6 files changed, 354 insertions(+)
> create mode 100644 drivers/media/platform/imx/Kconfig
> create mode 100644 drivers/media/platform/imx/Makefile
> create mode 100644 drivers/media/platform/imx/imx-ipu.c
> create mode 100644 drivers/media/platform/imx/imx-ipu.h
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index f6bed19..66c8d91 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -29,6 +29,8 @@ config VIDEO_VIA_CAMERA
>
> source "drivers/media/platform/davinci/Kconfig"
>
> +source "drivers/media/platform/imx/Kconfig"
> +
> source "drivers/media/platform/omap/Kconfig"
>
> source "drivers/media/platform/blackfin/Kconfig"
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index 114f9ab..c3438c2 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -46,6 +46,7 @@ obj-$(CONFIG_SOC_CAMERA) += soc_camera/
>
> obj-$(CONFIG_VIDEO_RENESAS_VSP1) += vsp1/
>
> +obj-y += imx/
> obj-y += omap/
>
> obj-$(CONFIG_VIDEO_AM437X_VPFE) += am437x/
> diff --git a/drivers/media/platform/imx/Kconfig b/drivers/media/platform/imx/Kconfig
> new file mode 100644
> index 0000000..a90c973
> --- /dev/null
> +++ b/drivers/media/platform/imx/Kconfig
> @@ -0,0 +1,2 @@
> +config VIDEO_IMX_IPU_COMMON
> + tristate
> diff --git a/drivers/media/platform/imx/Makefile b/drivers/media/platform/imx/Makefile
> new file mode 100644
> index 0000000..5de119c
> --- /dev/null
> +++ b/drivers/media/platform/imx/Makefile
> @@ -0,0 +1 @@
> +obj-$(CONFIG_VIDEO_IMX_IPU_COMMON) += imx-ipu.o
> diff --git a/drivers/media/platform/imx/imx-ipu.c b/drivers/media/platform/imx/imx-ipu.c
> new file mode 100644
> index 0000000..c1b8637
> --- /dev/null
> +++ b/drivers/media/platform/imx/imx-ipu.c
> @@ -0,0 +1,313 @@
> +/*
> + * i.MX IPUv3 common v4l2 support
> + *
> + * Copyright (C) 2011 Sascha Hauer, Pengutronix
> + *
> + * 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.
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +#include <linux/module.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-dev.h>
> +#include <media/v4l2-ioctl.h>
> +
> +#include "imx-ipu.h"
> +
> +static struct ipu_fmt ipu_fmt_yuv[] = {
> + {
> + .fourcc = V4L2_PIX_FMT_YUV420,
> + .name = "YUV 4:2:0 planar, YCbCr",
> + .bytes_per_pixel = 1,
> + }, {
> + .fourcc = V4L2_PIX_FMT_YVU420,
> + .name = "YUV 4:2:0 planar, YCrCb",
> + .bytes_per_pixel = 1,
> + }, {
> + .fourcc = V4L2_PIX_FMT_YUV422P,
> + .name = "YUV 4:2:2 planar, YCbCr",
> + .bytes_per_pixel = 1,
> + }, {
> + .fourcc = V4L2_PIX_FMT_NV12,
> + .name = "YUV 4:2:0 partial interleaved, YCbCr",
> + .bytes_per_pixel = 1,
> + }, {
> + .fourcc = V4L2_PIX_FMT_UYVY,
> + .name = "4:2:2, packed, UYVY",
> + .bytes_per_pixel = 2,
> + }, {
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + .name = "4:2:2, packed, YUYV",
> + .bytes_per_pixel = 2,
Drop .name from this struct. The v4l2 core will fill this in ensuring consistent
naming.
> + },
> +};
> +
> +static struct ipu_fmt ipu_fmt_rgb[] = {
> + {
> + .fourcc = V4L2_PIX_FMT_RGB32,
> + .name = "RGB888",
> + .bytes_per_pixel = 4,
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB24,
> + .name = "RGB24",
> + .bytes_per_pixel = 3,
> + }, {
> + .fourcc = V4L2_PIX_FMT_BGR24,
> + .name = "BGR24",
> + .bytes_per_pixel = 3,
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB565,
> + .name = "RGB565",
> + .bytes_per_pixel = 2,
> + },
> + {
> + .fourcc = V4L2_PIX_FMT_BGR32,
> + .name = "BGR888",
> + .bytes_per_pixel = 4,
> + },
> +};
> +
> +struct ipu_fmt *ipu_find_fmt_yuv(unsigned int pixelformat)
> +{
> + struct ipu_fmt *fmt;
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(ipu_fmt_yuv); i++) {
> + fmt = &ipu_fmt_yuv[i];
> + if (fmt->fourcc == pixelformat)
> + return fmt;
> + }
> +
> + return NULL;
> +}
> +EXPORT_SYMBOL_GPL(ipu_find_fmt_yuv);
> +
> +struct ipu_fmt *ipu_find_fmt_rgb(unsigned int pixelformat)
> +{
> + struct ipu_fmt *fmt;
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(ipu_fmt_rgb); i++) {
> + fmt = &ipu_fmt_rgb[i];
> + if (fmt->fourcc == pixelformat)
> + return fmt;
> + }
> +
> + return NULL;
> +}
> +EXPORT_SYMBOL_GPL(ipu_find_fmt_rgb);
> +
> +static struct ipu_fmt *ipu_find_fmt(unsigned long pixelformat)
> +{
> + struct ipu_fmt *fmt;
> +
> + fmt = ipu_find_fmt_yuv(pixelformat);
> + if (fmt)
> + return fmt;
> + fmt = ipu_find_fmt_rgb(pixelformat);
> +
> + return fmt;
> +}
> +EXPORT_SYMBOL_GPL(ipu_find_fmt);
> +
> +int ipu_try_fmt(struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct ipu_fmt *fmt;
> +
> + v4l_bound_align_image(&f->fmt.pix.width, 8, 4096, 2,
> + &f->fmt.pix.height, 2, 4096, 1, 0);
> +
> + f->fmt.pix.field = V4L2_FIELD_NONE;
> +
> + fmt = ipu_find_fmt(f->fmt.pix.pixelformat);
> + if (!fmt)
> + return -EINVAL;
> +
> + f->fmt.pix.bytesperline = f->fmt.pix.width * fmt->bytes_per_pixel;
> + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
> + if (fmt->fourcc == V4L2_PIX_FMT_YUV420 ||
> + fmt->fourcc == V4L2_PIX_FMT_YVU420 ||
> + fmt->fourcc == V4L2_PIX_FMT_NV12)
> + f->fmt.pix.sizeimage = f->fmt.pix.sizeimage * 3 / 2;
> + else if (fmt->fourcc == V4L2_PIX_FMT_YUV422P)
> + f->fmt.pix.sizeimage *= 2;
Do you need to set colorspace as well? Or will that be done by the driver
that calls this function?
> +
> + f->fmt.pix.priv = 0;
The priv assignment is no longer needed and can be dropped.
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(ipu_try_fmt);
> +
> +int ipu_try_fmt_rgb(struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct ipu_fmt *fmt;
> +
> + fmt = ipu_find_fmt_rgb(f->fmt.pix.pixelformat);
> + if (!fmt)
> + return -EINVAL;
> +
> + return ipu_try_fmt(file, fh, f);
> +}
> +EXPORT_SYMBOL_GPL(ipu_try_fmt_rgb);
> +
> +int ipu_try_fmt_yuv(struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct ipu_fmt *fmt;
> +
> + fmt = ipu_find_fmt_yuv(f->fmt.pix.pixelformat);
> + if (!fmt)
> + return -EINVAL;
> +
> + return ipu_try_fmt(file, fh, f);
> +}
> +EXPORT_SYMBOL_GPL(ipu_try_fmt_yuv);
> +
> +int ipu_enum_fmt_rgb(struct file *file, void *fh,
> + struct v4l2_fmtdesc *f)
> +{
> + struct ipu_fmt *fmt;
> +
> + if (f->index >= ARRAY_SIZE(ipu_fmt_rgb))
> + return -EINVAL;
> +
> + fmt = &ipu_fmt_rgb[f->index];
> +
> + strlcpy(f->description, fmt->name, sizeof(f->description));
Drop this, there is no more need to fill in the description.
> + f->pixelformat = fmt->fourcc;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(ipu_enum_fmt_rgb);
> +
> +int ipu_enum_fmt_yuv(struct file *file, void *fh,
> + struct v4l2_fmtdesc *f)
> +{
> + struct ipu_fmt *fmt;
> +
> + if (f->index >= ARRAY_SIZE(ipu_fmt_yuv))
> + return -EINVAL;
> +
> + fmt = &ipu_fmt_yuv[f->index];
> +
> + strlcpy(f->description, fmt->name, sizeof(f->description));
Ditto.
> + f->pixelformat = fmt->fourcc;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(ipu_enum_fmt_yuv);
> +
> +int ipu_enum_fmt(struct file *file, void *fh,
> + struct v4l2_fmtdesc *f)
> +{
> + struct ipu_fmt *fmt;
> + int index = f->index;
> +
> + if (index >= ARRAY_SIZE(ipu_fmt_yuv)) {
> + index -= ARRAY_SIZE(ipu_fmt_yuv);
> + if (index >= ARRAY_SIZE(ipu_fmt_rgb))
> + return -EINVAL;
> + fmt = &ipu_fmt_rgb[index];
> + } else {
> + fmt = &ipu_fmt_yuv[index];
> + }
> +
> + strlcpy(f->description, fmt->name, sizeof(f->description));
> + f->pixelformat = fmt->fourcc;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(ipu_enum_fmt);
> +
> +int ipu_s_fmt(struct file *file, void *fh,
> + struct v4l2_format *f, struct v4l2_pix_format *pix)
> +{
> + int ret;
> +
> + ret = ipu_try_fmt(file, fh, f);
> + if (ret)
> + return ret;
> +
> + pix->width = f->fmt.pix.width;
> + pix->height = f->fmt.pix.height;
> + pix->pixelformat = f->fmt.pix.pixelformat;
> + pix->bytesperline = f->fmt.pix.bytesperline;
> + pix->sizeimage = f->fmt.pix.sizeimage;
> + pix->colorspace = f->fmt.pix.colorspace;
Why not do *pix = f->fmt.pix?
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(ipu_s_fmt);
> +
> +int ipu_s_fmt_rgb(struct file *file, void *fh,
> + struct v4l2_format *f, struct v4l2_pix_format *pix)
> +{
> + struct ipu_fmt *fmt;
> +
> + fmt = ipu_find_fmt_rgb(f->fmt.pix.pixelformat);
> + if (!fmt)
> + return -EINVAL;
> +
> + return ipu_s_fmt(file, fh, f, pix);
> +}
> +EXPORT_SYMBOL_GPL(ipu_s_fmt_rgb);
> +
> +int ipu_s_fmt_yuv(struct file *file, void *fh,
> + struct v4l2_format *f, struct v4l2_pix_format *pix)
> +{
> + struct ipu_fmt *fmt;
> +
> + fmt = ipu_find_fmt_yuv(f->fmt.pix.pixelformat);
> + if (!fmt)
> + return -EINVAL;
> +
> + return ipu_s_fmt(file, fh, f, pix);
> +}
> +EXPORT_SYMBOL_GPL(ipu_s_fmt_yuv);
> +
> +int ipu_g_fmt(struct v4l2_format *f, struct v4l2_pix_format *pix)
> +{
> + f->fmt.pix.field = V4L2_FIELD_NONE;
> + f->fmt.pix.pixelformat = pix->pixelformat;
> + f->fmt.pix.bytesperline = pix->bytesperline;
> + f->fmt.pix.width = pix->width;
> + f->fmt.pix.height = pix->height;
> + f->fmt.pix.sizeimage = pix->sizeimage;
> + f->fmt.pix.colorspace = pix->colorspace;
> + f->fmt.pix.priv = 0;
Why not do f->fmt.pix = *pix?
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(ipu_g_fmt);
> +
> +int ipu_enum_framesizes(struct file *file, void *fh,
> + struct v4l2_frmsizeenum *fsize)
> +{
> + struct ipu_fmt *fmt;
> +
> + if (fsize->index != 0)
> + return -EINVAL;
> +
> + fmt = ipu_find_fmt(fsize->pixel_format);
> + if (!fmt)
> + return -EINVAL;
> +
> + fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
> + fsize->stepwise.min_width = 1;
> + fsize->stepwise.min_height = 1;
> + fsize->stepwise.max_width = 4096;
> + fsize->stepwise.max_height = 4096;
> + fsize->stepwise.step_width = fsize->stepwise.step_height = 1;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(ipu_enum_framesizes);
> +
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/media/platform/imx/imx-ipu.h b/drivers/media/platform/imx/imx-ipu.h
> new file mode 100644
> index 0000000..51c0982
> --- /dev/null
> +++ b/drivers/media/platform/imx/imx-ipu.h
> @@ -0,0 +1,35 @@
> +#ifndef __MEDIA_IMX_IPU_H
> +#define __MEDIA_IMX_IPU_H
> +#include <linux/videodev2.h>
> +
> +struct ipu_fmt {
> + u32 fourcc;
> + const char *name;
> + int bytes_per_pixel;
> +};
> +
> +int ipu_enum_fmt(struct file *file, void *fh,
> + struct v4l2_fmtdesc *f);
> +int ipu_enum_fmt_rgb(struct file *file, void *fh,
> + struct v4l2_fmtdesc *f);
> +int ipu_enum_fmt_yuv(struct file *file, void *fh,
> + struct v4l2_fmtdesc *f);
> +struct ipu_fmt *ipu_find_fmt_rgb(unsigned int pixelformat);
> +struct ipu_fmt *ipu_find_fmt_yuv(unsigned int pixelformat);
> +int ipu_try_fmt(struct file *file, void *fh,
> + struct v4l2_format *f);
> +int ipu_try_fmt_rgb(struct file *file, void *fh,
> + struct v4l2_format *f);
> +int ipu_try_fmt_yuv(struct file *file, void *fh,
> + struct v4l2_format *f);
> +int ipu_s_fmt(struct file *file, void *fh,
> + struct v4l2_format *f, struct v4l2_pix_format *pix);
> +int ipu_s_fmt_rgb(struct file *file, void *fh,
> + struct v4l2_format *f, struct v4l2_pix_format *pix);
> +int ipu_s_fmt_yuv(struct file *file, void *fh,
> + struct v4l2_format *f, struct v4l2_pix_format *pix);
> +int ipu_g_fmt(struct v4l2_format *f, struct v4l2_pix_format *pix);
> +int ipu_enum_framesizes(struct file *file, void *fh,
> + struct v4l2_frmsizeenum *fsize);
> +
> +#endif /* __MEDIA_IMX_IPU_H */
>
Regards,
Hans
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