Re: [PATCH 2/3] media: rockchip: Introduce driver for Rockhip's camera interface

Hans Verkuil
2020-04-16T09:36:18Z

+Helen Koike (rkisp1 maintainer)

A quick review below...

On 03/04/2020 16:21, Maxime Chevallier wrote:
> Introduce a driver for the camera interface on some Rockchip platforms.
>
> This controller supports CSI2, Parallel and BT656 interfaces, but for
> now only the parallel interface could be tested, hence it's the only one
> that's supported in the first version of this driver.
>
> This controller can be fond on PX30, RK1808, RK3128, RK3288 and RK3288,

fond -> found

'RK3288 and RK3288'? Typo?

> but for now it's only be tested on PX30.
>
> Most of this driver was written follwing the BSP driver from rockchip,

follwing -> following

> removing the parts that either didn't fit correctly the guidelines, or
> that couldn't be tested.
>
> This basic version doesn't support cropping nor scaling, and is only
> designed with one sensor being attached to it a any time.

a any -> at any

Make sure you test with v4l2-compliance, in fact, I need to see the output
of 'v4l2-compliance -s' when you post v2. There shouldn't be any warnings
or fails. Make sure you build v4l2-compliance from the git repo
(https://git.linuxtv.org//v4l-utils.git) directly, that ensures that you
use the latest and greatest version.

How does this driver compare to drivers/staging/media/rkisp1? Is the ISP
hardware completely different (it probably is, just checking)?

How complex is the ISP hardware? This driver is a regular video driver,
but should it move to a media controller based driver instead, like rkisp1?

I don't know the hardware, so I can't tell.

>
> Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
> ---
> drivers/media/platform/Kconfig | 13 +
> drivers/media/platform/Makefile | 1 +
> drivers/media/platform/rockchip/cif/Makefile | 3 +
> drivers/media/platform/rockchip/cif/capture.c | 1170 +++++++++++++++++
> drivers/media/platform/rockchip/cif/dev.c | 407 ++++++
> drivers/media/platform/rockchip/cif/dev.h | 208 +++
> drivers/media/platform/rockchip/cif/regs.h | 256 ++++
> 7 files changed, 2058 insertions(+)
> create mode 100644 drivers/media/platform/rockchip/cif/Makefile
> create mode 100644 drivers/media/platform/rockchip/cif/capture.c
> create mode 100644 drivers/media/platform/rockchip/cif/dev.c
> create mode 100644 drivers/media/platform/rockchip/cif/dev.h
> create mode 100644 drivers/media/platform/rockchip/cif/regs.h
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index f65e98d3adf2..d2f413a99886 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -460,6 +460,19 @@ config VIDEO_ROCKCHIP_RGA
>
> To compile this driver as a module choose m here.
>
> +config VIDEO_ROCKCHIP_CIF
> + tristate "Rockchip Camera Interface"
> + depends on VIDEO_DEV && VIDEO_V4L2
> + depends on ARCH_ROCKCHIP || COMPILE_TEST
> + select VIDEOBUF2_DMA_SG
> + select VIDEOBUF2_DMA_CONTIG
> + select V4L2_FWNODE
> + select V4L2_MEM2MEM_DEV
> + help
> + This is a v4l2 driver for Rockchip SOC Camera interface.
> +
> + To compile this driver as a module choose m here.
> +
> config VIDEO_TI_VPE
> tristate "TI VPE (Video Processing Engine) driver"
> depends on VIDEO_DEV && VIDEO_V4L2
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index d13db96e3015..67e7ac034be1 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -68,6 +68,7 @@ obj-$(CONFIG_VIDEO_RENESAS_JPU) += rcar_jpu.o
> obj-$(CONFIG_VIDEO_RENESAS_VSP1) += vsp1/
>
> obj-$(CONFIG_VIDEO_ROCKCHIP_RGA) += rockchip/rga/
> +obj-$(CONFIG_VIDEO_ROCKCHIP_CIF) += rockchip/cif/
>
> obj-y += omap/
>
> diff --git a/drivers/media/platform/rockchip/cif/Makefile b/drivers/media/platform/rockchip/cif/Makefile
> new file mode 100644
> index 000000000000..727990824316
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/cif/Makefile
> @@ -0,0 +1,3 @@
> +# SPDX-License-Identifier: GPL-2.0
> +obj-$(CONFIG_VIDEO_ROCKCHIP_CIF) += video_rkcif.o
> +video_rkcif-objs += dev.o capture.o
> diff --git a/drivers/media/platform/rockchip/cif/capture.c b/drivers/media/platform/rockchip/cif/capture.c
> new file mode 100644
> index 000000000000..9df7757c6ed9
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/cif/capture.c
> @@ -0,0 +1,1170 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Rockchip CIF Driver
> + *
> + * Copyright (C) 2018 Rockchip Electronics Co., Ltd.
> + * Copyright (C) 2020 Maxime Chevallier <maxime.chevallier@bootlin.com>
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/reset.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-fh.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-mc.h>
> +#include <media/v4l2-subdev.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "dev.h"
> +#include "regs.h"
> +
> +#define CIF_REQ_BUFS_MIN 1
> +#define CIF_MIN_WIDTH 64
> +#define CIF_MIN_HEIGHT 64
> +#define CIF_MAX_WIDTH 8192
> +#define CIF_MAX_HEIGHT 8192
> +
> +#define RKCIF_PLANE_Y 0
> +#define RKCIF_PLANE_CBCR 1
> +
> +#define CIF_FETCH_Y_LAST_LINE(VAL) ((VAL) & 0x1fff)
> +/* Check if swap y and c in bt1120 mode */
> +#define CIF_FETCH_IS_Y_FIRST(VAL) ((VAL) & 0xf)
> +
> +/* Get xsubs and ysubs for fourcc formats
> + *
> + * @xsubs: horizontal color samples in a 4*4 matrix, for yuv
> + * @ysubs: vertical color samples in a 4*4 matrix, for yuv
> + */
> +static int fcc_xysubs(u32 fcc, u32 *xsubs, u32 *ysubs)
> +{
> + switch (fcc) {
> + case V4L2_PIX_FMT_NV16:
> + case V4L2_PIX_FMT_NV61:
> + *xsubs = 2;
> + *ysubs = 1;
> + break;
> + case V4L2_PIX_FMT_NV21:
> + case V4L2_PIX_FMT_NV12:
> + *xsubs = 2;
> + *ysubs = 2;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static const struct cif_output_fmt out_fmts[] = {
> + {
> + .fourcc = V4L2_PIX_FMT_NV16,
> + .cplanes = 2,
> + .mplanes = 1,
> + .fmt_val = YUV_OUTPUT_422 | UV_STORAGE_ORDER_UVUV,
> + .bpp = { 8, 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_NV61,
> + .fmt_val = YUV_OUTPUT_422 | UV_STORAGE_ORDER_VUVU,
> + .cplanes = 2,
> + .mplanes = 1,
> + .bpp = { 8, 16 },
> + },
> + {
> + .fourcc = V4L2_PIX_FMT_NV12,
> + .fmt_val = YUV_OUTPUT_420 | UV_STORAGE_ORDER_UVUV,
> + .cplanes = 2,
> + .mplanes = 1,
> + .bpp = { 8, 16 },
> + .mbus = MEDIA_BUS_FMT_UYVY8_2X8,
> + },
> + {
> + .fourcc = V4L2_PIX_FMT_NV21,
> + .fmt_val = YUV_OUTPUT_420 | UV_STORAGE_ORDER_VUVU,
> + .cplanes = 2,
> + .mplanes = 1,
> + .bpp = { 8, 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB24,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 24 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB565,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_BGR666,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 18 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SRGGB8,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 8 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGRBG8,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 8 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGBRG8,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 8 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SBGGR8,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 8 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SRGGB10,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGRBG10,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGBRG10,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SBGGR10,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SRGGB12,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGRBG12,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGBRG12,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SBGGR12,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_SBGGR16,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }, {
> + .fourcc = V4L2_PIX_FMT_Y16,
> + .cplanes = 1,
> + .mplanes = 1,
> + .bpp = { 16 },
> + }
> +};
> +
> +static const struct cif_input_fmt in_fmts[] = {
> + {
> + .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_YUYV,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_YUYV,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_INTERLACED,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_YVYU,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_YVYU,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_INTERLACED,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_UYVY,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_UYVY,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_INTERLACED,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_VYUY,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
> + .dvp_fmt_val = YUV_INPUT_422 | YUV_INPUT_ORDER_VYUY,
> + .csi_fmt_val = CSI_WRDDR_TYPE_YUV422,
> + .fmt_type = CIF_FMT_TYPE_YUV,
> + .field = V4L2_FIELD_INTERLACED,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_8,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW8,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_8,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW8,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_8,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW8,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_8,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW8,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_10,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW10,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_10,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW10,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_10,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW10,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_10,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW10,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_12,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW12,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_12,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW12,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_12,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW12,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_12,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW12,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_RGB888_1X24,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RGB888,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_Y8_1X8,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_8,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW8,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_Y10_1X10,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_10,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW10,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }, {
> + .mbus_code = MEDIA_BUS_FMT_Y12_1X12,
> + .dvp_fmt_val = INPUT_MODE_RAW | RAW_DATA_WIDTH_12,
> + .csi_fmt_val = CSI_WRDDR_TYPE_RAW12,
> + .fmt_type = CIF_FMT_TYPE_RAW,
> + .field = V4L2_FIELD_NONE,
> + }
> +};
> +
> +static const struct
> +cif_input_fmt *get_input_fmt(struct v4l2_subdev *sd)

Don't put a linebreak after 'struct'. You can do this, though:

static const struct cif_input_fmt *
get_input_fmt(struct v4l2_subdev *sd)

However, the whole prototype is just 72 chars long, so just keep it
in one line.

> +{
> + struct v4l2_subdev_format fmt;
> + int ret;
> + u32 i;
> +
> + fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> + fmt.pad = 0;
> + ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
> + if (ret < 0) {
> + v4l2_warn(sd->v4l2_dev,
> + "sensor fmt invalid, set to default size\n");
> + goto set_default;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(in_fmts); i++)
> + if (fmt.format.code == in_fmts[i].mbus_code &&
> + fmt.format.field == in_fmts[i].field)
> + return &in_fmts[i];
> +
> + v4l2_err(sd->v4l2_dev, "remote sensor mbus code not supported\n");
> +
> +set_default:
> + return NULL;
> +}
> +
> + static const struct

Leading tab? I expect 'checkpatch.pl --strict' to catch that. Please run that
before posting v2.

> +cif_output_fmt *find_output_fmt(struct rkcif_stream *stream, u32 pixelfmt)
> +{
> + const struct cif_output_fmt *fmt;
> + u32 i;
> +
> + for (i = 0; i < ARRAY_SIZE(out_fmts); i++) {
> + fmt = &out_fmts[i];
> + if (fmt->fourcc == pixelfmt)
> + return fmt;
> + }
> +
> + return NULL;
> +}
> +
> +/***************************** stream operations ******************************/
> +static void rkcif_assign_new_buffer_oneframe(struct rkcif_stream *stream)
> +{
> + struct rkcif_dummy_buffer *dummy_buf = &stream->dummy_buf;
> + struct rkcif_device *dev = stream->cifdev;
> + void __iomem *base = dev->base_addr;
> +
> + /* Set up an empty buffer for the next frame */
> + spin_lock(&stream->vbq_lock);
> + if (!list_empty(&stream->buf_head)) {
> + stream->curr_buf = list_first_entry(&stream->buf_head,
> + struct rkcif_buffer, queue);
> + list_del(&stream->curr_buf->queue);
> + } else {
> + stream->curr_buf = NULL;
> + }
> + spin_unlock(&stream->vbq_lock);
> +
> + if (stream->curr_buf) {
> + write_cif_reg(base, CIF_FRM0_ADDR_Y,
> + stream->curr_buf->buff_addr[RKCIF_PLANE_Y]);
> + write_cif_reg(base, CIF_FRM0_ADDR_UV,
> + stream->curr_buf->buff_addr[RKCIF_PLANE_CBCR]);
> + write_cif_reg(base, CIF_FRM1_ADDR_Y,
> + stream->curr_buf->buff_addr[RKCIF_PLANE_Y]);
> + write_cif_reg(base, CIF_FRM1_ADDR_UV,
> + stream->curr_buf->buff_addr[RKCIF_PLANE_CBCR]);
> + } else {
> + write_cif_reg(base, CIF_FRM0_ADDR_Y, dummy_buf->dma_addr);
> + write_cif_reg(base, CIF_FRM0_ADDR_UV, dummy_buf->dma_addr);
> + write_cif_reg(base, CIF_FRM1_ADDR_Y, dummy_buf->dma_addr);
> + write_cif_reg(base, CIF_FRM1_ADDR_UV, dummy_buf->dma_addr);
> + }
> +}
> +
> +static void rkcif_stream_stop(struct rkcif_stream *stream)
> +{
> + struct rkcif_device *cif_dev = stream->cifdev;
> + void __iomem *base = cif_dev->base_addr;
> + u32 val;
> +
> + val = read_cif_reg(base, CIF_CTRL);
> + write_cif_reg(base, CIF_CTRL, val & (~ENABLE_CAPTURE));
> + write_cif_reg(base, CIF_INTEN, 0x0);
> + write_cif_reg(base, CIF_INTSTAT, 0x3ff);
> + write_cif_reg(base, CIF_FRAME_STATUS, 0x0);
> +
> + stream->state = RKCIF_STATE_READY;
> +}
> +
> +static int rkcif_queue_setup(struct vb2_queue *queue,
> + unsigned int *num_buffers,
> + unsigned int *num_planes,
> + unsigned int sizes[],
> + struct device *alloc_devs[])
> +{
> + struct rkcif_stream *stream = queue->drv_priv;
> + const struct v4l2_pix_format_mplane *pixm;
> + const struct cif_output_fmt *cif_fmt;
> + u32 i;
> +
> + pixm = &stream->pixm;
> + cif_fmt = stream->cif_fmt_out;
> +
> + if (*num_planes) {
> + if (*num_planes != cif_fmt->mplanes)
> + return -EINVAL;
> +
> + for (i = 0; i < cif_fmt->mplanes; i++)
> + if (sizes[i] < pixm->plane_fmt[i].sizeimage)
> + return -EINVAL;
> + return 0;
> + }
> +
> + *num_planes = cif_fmt->mplanes;
> +
> + for (i = 0; i < cif_fmt->mplanes; i++) {
> + const struct v4l2_plane_pix_format *plane_fmt;
> +
> + plane_fmt = &pixm->plane_fmt[i];
> + sizes[i] = plane_fmt->sizeimage;
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * The vb2_buffer are stored in rkcif_buffer, in order to unify
> + * mplane buffer and none-mplane buffer.
> + */
> +static void rkcif_buf_queue(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct rkcif_buffer *cifbuf = to_rkcif_buffer(vbuf);
> + struct vb2_queue *queue = vb->vb2_queue;
> + struct rkcif_stream *stream = queue->drv_priv;
> + struct v4l2_pix_format_mplane *pixm = &stream->pixm;
> + const struct cif_output_fmt *fmt = stream->cif_fmt_out;
> + unsigned long lock_flags = 0;
> + int i;
> +
> + memset(cifbuf->buff_addr, 0, sizeof(cifbuf->buff_addr));
> + /* If mplanes > 1, every c-plane has its own m-plane,
> + * otherwise, multiple c-planes are in the same m-plane
> + */
> + for (i = 0; i < fmt->mplanes; i++)
> + cifbuf->buff_addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
> +
> + if (fmt->mplanes == 1) {
> + for (i = 0; i < fmt->cplanes - 1; i++)
> + cifbuf->buff_addr[i + 1] = cifbuf->buff_addr[i] +
> + pixm->plane_fmt[i].bytesperline * pixm->height;
> + }
> +
> + spin_lock_irqsave(&stream->vbq_lock, lock_flags);
> + list_add_tail(&cifbuf->queue, &stream->buf_head);
> + spin_unlock_irqrestore(&stream->vbq_lock, lock_flags);
> +}
> +
> +static int rkcif_create_dummy_buf(struct rkcif_stream *stream)
> +{

Why do you need a dummy buffer? That's very unusual, so at the very least
this needs comments.

> + struct rkcif_dummy_buffer *dummy_buf = &stream->dummy_buf;
> + struct rkcif_device *dev = stream->cifdev;
> +
> + /* get a maximum plane size */
> + dummy_buf->size = max3(stream->pixm.plane_fmt[0].bytesperline *
> + stream->pixm.height,
> + stream->pixm.plane_fmt[1].sizeimage,
> + stream->pixm.plane_fmt[2].sizeimage);
> +
> + dummy_buf->vaddr = dma_alloc_coherent(dev->dev, dummy_buf->size,
> + &dummy_buf->dma_addr,
> + GFP_KERNEL);
> + if (!dummy_buf->vaddr) {
> + v4l2_err(&dev->v4l2_dev,
> + "Failed to allocate the memory for dummy buffer\n");
> + return -ENOMEM;
> + }
> +
> + v4l2_info(&dev->v4l2_dev, "Allocate dummy buffer, size: 0x%08x\n",
> + dummy_buf->size);
> +
> + return 0;
> +}
> +
> +static void rkcif_destroy_dummy_buf(struct rkcif_stream *stream)
> +{
> + struct rkcif_dummy_buffer *dummy_buf = &stream->dummy_buf;
> + struct rkcif_device *dev = stream->cifdev;
> +
> + dma_free_coherent(dev->dev, dummy_buf->size,
> + dummy_buf->vaddr, dummy_buf->dma_addr);
> +}
> +
> +static void rkcif_stop_streaming(struct vb2_queue *queue)
> +{
> + struct rkcif_stream *stream = queue->drv_priv;
> + struct rkcif_device *dev = stream->cifdev;
> + struct rkcif_buffer *buf;
> + struct v4l2_subdev *sd;
> + int ret;
> +
> + stream->stopping = true;
> + ret = wait_event_timeout(stream->wq_stopped,
> + stream->state != RKCIF_STATE_STREAMING,
> + msecs_to_jiffies(1000));
> + if (!ret) {
> + rkcif_stream_stop(stream);
> + stream->stopping = false;
> + }
> + pm_runtime_put(dev->dev);
> +
> + /* stop the sub device*/
> + sd = dev->sensor.sd;
> + v4l2_subdev_call(sd, video, s_stream, 0);
> + v4l2_subdev_call(sd, core, s_power, 0);
> +
> + /* release buffers */
> + if (stream->curr_buf) {
> + list_add_tail(&stream->curr_buf->queue, &stream->buf_head);
> + stream->curr_buf = NULL;
> + }
> + if (stream->next_buf) {
> + list_add_tail(&stream->next_buf->queue, &stream->buf_head);
> + stream->next_buf = NULL;
> + }
> +
> + while (!list_empty(&stream->buf_head)) {
> + buf = list_first_entry(&stream->buf_head,
> + struct rkcif_buffer, queue);
> + list_del(&buf->queue);
> + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> + }
> +
> + rkcif_destroy_dummy_buf(stream);
> +}
> +
> +static u32 rkcif_determine_input_mode(struct rkcif_device *dev)
> +{
> + struct rkcif_sensor_info *sensor_info = &dev->sensor;
> + struct rkcif_stream *stream = &dev->stream;
> + v4l2_std_id std;
> + u32 mode = INPUT_MODE_YUV;
> + int ret;
> +
> + ret = v4l2_subdev_call(sensor_info->sd, video, querystd, &std);
> + if (ret == 0) {
> + /* retrieve std from sensor if exist */
> + switch (std) {
> + case V4L2_STD_NTSC:
> + mode = INPUT_MODE_NTSC;
> + break;
> + case V4L2_STD_PAL:
> + mode = INPUT_MODE_PAL;
> + break;
> + case V4L2_STD_ATSC:
> + mode = INPUT_MODE_BT1120;
> + break;

Huh? V4L2_STD_* is only used for SDTV video receivers (i.e. Composite, S-Video,
analog TV). Sensors do not use it. So what is going on here?

And V4L2_STD_ATSC is deprecated and should not be used in new drivers.

> + default:
> + v4l2_err(&dev->v4l2_dev,
> + "std: %lld is not supported", std);

Missing break.

> + }
> + } else {
> + /* determine input mode by mbus_code (fmt_type) */
> + switch (stream->cif_fmt_in->fmt_type) {
> + case CIF_FMT_TYPE_YUV:
> + mode = INPUT_MODE_YUV;
> + break;
> + case CIF_FMT_TYPE_RAW:
> + mode = INPUT_MODE_RAW;
> + break;
> + }
> + }
> +
> + return mode;
> +}
> +
> +static inline u32 rkcif_scl_ctl(struct rkcif_stream *stream)
> +{
> + u32 fmt_type = stream->cif_fmt_in->fmt_type;
> +
> + return (fmt_type == CIF_FMT_TYPE_YUV) ?
> + ENABLE_YUV_16BIT_BYPASS : ENABLE_RAW_16BIT_BYPASS;
> +}
> +
> +static int rkcif_stream_start(struct rkcif_stream *stream)
> +{
> + u32 val, mbus_flags, href_pol, vsync_pol,
> + xfer_mode = 0, yc_swap = 0, skip_top = 0;
> + struct rkcif_device *dev = stream->cifdev;
> + struct rkcif_sensor_info *sensor_info;
> + void __iomem *base = dev->base_addr;
> +
> + sensor_info = &dev->sensor;
> + stream->frame_idx = 0;
> +
> + mbus_flags = sensor_info->mbus.flags;
> + href_pol = (mbus_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) ?
> + HSY_HIGH_ACTIVE : HSY_LOW_ACTIVE;
> + vsync_pol = (mbus_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) ?
> + VSY_HIGH_ACTIVE : VSY_LOW_ACTIVE;
> +
> + if (rkcif_determine_input_mode(dev) == INPUT_MODE_BT1120) {
> + if (stream->cif_fmt_in->field == V4L2_FIELD_NONE)
> + xfer_mode = BT1120_TRANSMIT_PROGRESS;
> + else
> + xfer_mode = BT1120_TRANSMIT_INTERFACE;
> + if (!CIF_FETCH_IS_Y_FIRST(stream->cif_fmt_in->dvp_fmt_val))
> + yc_swap = BT1120_YC_SWAP;
> + }
> +
> + val = vsync_pol | href_pol | rkcif_determine_input_mode(dev) |
> + stream->cif_fmt_out->fmt_val | stream->cif_fmt_in->dvp_fmt_val |
> + xfer_mode | yc_swap;
> + write_cif_reg(base, CIF_FOR, val);
> + val = stream->pixm.width;
> + if (stream->cif_fmt_in->fmt_type == CIF_FMT_TYPE_RAW)
> + val = stream->pixm.width * 2;
> + write_cif_reg(base, CIF_VIR_LINE_WIDTH, val);
> + write_cif_reg(base, CIF_SET_SIZE,
> + stream->pixm.width | (stream->pixm.height << 16));
> +
> + v4l2_subdev_call(sensor_info->sd, sensor, g_skip_top_lines, &skip_top);
> +
> + write_cif_reg(base, CIF_CROP, skip_top << CIF_CROP_Y_SHIFT);
> + write_cif_reg(base, CIF_FRAME_STATUS, FRAME_STAT_CLS);
> + write_cif_reg(base, CIF_INTSTAT, INTSTAT_CLS);
> + write_cif_reg(base, CIF_SCL_CTRL, rkcif_scl_ctl(stream));
> +
> + rkcif_assign_new_buffer_oneframe(stream);
> +
> + write_cif_reg(base, CIF_INTEN, FRAME_END_EN | LINE_ERR_EN |
> + PST_INF_FRAME_END);
> +
> + if (dev->chip_id == CHIP_RK1808_CIF &&
> + rkcif_determine_input_mode(dev) == INPUT_MODE_BT1120)
> + write_cif_reg(base, CIF_CTRL,
> + AXI_BURST_16 | MODE_PINGPONG | ENABLE_CAPTURE);
> + else
> + write_cif_reg(base, CIF_CTRL,
> + AXI_BURST_16 | MODE_ONEFRAME | ENABLE_CAPTURE);
> +
> + stream->state = RKCIF_STATE_STREAMING;
> +
> + return 0;
> +}
> +
> +static int rkcif_start_streaming(struct vb2_queue *queue, unsigned int count)
> +{
> + struct rkcif_stream *stream = queue->drv_priv;
> + struct rkcif_device *dev = stream->cifdev;
> + struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
> + struct v4l2_subdev *sd;
> + int ret;
> +
> + if (WARN_ON(stream->state != RKCIF_STATE_READY)) {
> + ret = -EBUSY;
> + v4l2_err(v4l2_dev, "stream in busy state\n");
> + goto destroy_buf;
> + }
> +
> + stream->cif_fmt_in = get_input_fmt(dev->sensor.sd);
> +
> + ret = rkcif_create_dummy_buf(stream);
> + if (ret < 0) {
> + v4l2_err(v4l2_dev, "Failed to create dummy_buf, %d\n", ret);
> + goto destroy_buf;
> + }
> +
> + ret = pm_runtime_get_sync(dev->dev);
> + if (ret < 0) {
> + v4l2_err(v4l2_dev, "Failed to get runtime pm, %d\n", ret);
> + goto destroy_dummy_buf;
> + }
> +
> + /* start sub-devices */
> + sd = dev->sensor.sd;
> + ret = v4l2_subdev_call(sd, core, s_power, 1);
> + if (ret < 0 && ret != -ENOIOCTLCMD)
> + goto runtime_put;
> + ret = v4l2_subdev_call(sd, video, s_stream, 1);
> + if (ret < 0)
> + goto subdev_poweroff;
> +
> + ret = rkcif_stream_start(stream);
> + if (ret < 0)
> + goto stop_stream;
> +
> + return 0;
> +
> +stop_stream:
> + rkcif_stream_stop(stream);
> +subdev_poweroff:
> + v4l2_subdev_call(sd, core, s_power, 0);
> +runtime_put:
> + pm_runtime_put(dev->dev);
> +destroy_dummy_buf:
> + rkcif_destroy_dummy_buf(stream);
> +destroy_buf:
> + while (!list_empty(&stream->buf_head)) {
> + struct rkcif_buffer *buf;
> +
> + buf = list_first_entry(&stream->buf_head,
> + struct rkcif_buffer, queue);
> + list_del(&buf->queue);
> + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
> + }
> +
> + return ret;
> +}
> +
> +static struct vb2_ops rkcif_vb2_ops = {
> + .queue_setup = rkcif_queue_setup,
> + .buf_queue = rkcif_buf_queue,
> + .wait_prepare = vb2_ops_wait_prepare,
> + .wait_finish = vb2_ops_wait_finish,
> + .stop_streaming = rkcif_stop_streaming,
> + .start_streaming = rkcif_start_streaming,
> +};
> +
> +static int rkcif_init_vb2_queue(struct vb2_queue *q,
> + struct rkcif_stream *stream,
> + enum v4l2_buf_type buf_type)
> +{
> + q->type = buf_type;
> + q->io_modes = VB2_MMAP | VB2_DMABUF;
> + q->drv_priv = stream;
> + q->ops = &rkcif_vb2_ops;
> + q->mem_ops = &vb2_dma_contig_memops;
> + q->buf_struct_size = sizeof(struct rkcif_buffer);
> + q->min_buffers_needed = CIF_REQ_BUFS_MIN;
> + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> + q->lock = &stream->vlock;
> + q->dev = stream->cifdev->dev;
> +
> + return vb2_queue_init(q);
> +}
> +
> +static void rkcif_set_fmt(struct rkcif_stream *stream,
> + struct v4l2_pix_format_mplane *pixm,
> + bool try)
> +{
> + const struct cif_output_fmt *fmt;
> + struct v4l2_rect input_rect;
> + unsigned int imagesize = 0, planes;
> + u32 xsubs = 1, ysubs = 1, i;
> +
> + fmt = find_output_fmt(stream, pixm->pixelformat);
> + if (!fmt)
> + fmt = &out_fmts[0];
> +
> + input_rect.width = CIF_MAX_WIDTH;
> + input_rect.height = CIF_MAX_HEIGHT;
> +
> + pixm->width = clamp_t(u32, pixm->width,
> + CIF_MIN_WIDTH, input_rect.width);
> + pixm->height = clamp_t(u32, pixm->height,
> + CIF_MIN_HEIGHT, input_rect.height);
> +
> + pixm->num_planes = fmt->mplanes;
> + pixm->quantization = V4L2_QUANTIZATION_DEFAULT;
> + pixm->colorspace = V4L2_COLORSPACE_SRGB;
> +
> + pixm->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pixm->colorspace);
> + pixm->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pixm->colorspace);

This colorimetry information should come from the sensor subdev. That's the
only component that knows this.

> +
> + pixm->pixelformat = fmt->fourcc;
> + pixm->field = V4L2_FIELD_NONE;
> +
> + /* calculate plane size and image size */
> + fcc_xysubs(fmt->fourcc, &xsubs, &ysubs);
> +
> + planes = fmt->cplanes ? fmt->cplanes : fmt->mplanes;
> +
> + for (i = 0; i < planes; i++) {
> + struct v4l2_plane_pix_format *plane_fmt;
> + int width, height, bpl, size;
> +
> + if (i == 0) {
> + width = pixm->width;
> + height = pixm->height;
> + } else {
> + width = pixm->width / xsubs;
> + height = pixm->height / ysubs;
> + }
> +
> + bpl = width * fmt->bpp[i] / 8;
> + size = bpl * height;
> + imagesize += size;
> +
> + if (fmt->mplanes > i) {
> + /* Set bpl and size for each mplane */
> + plane_fmt = pixm->plane_fmt + i;
> + plane_fmt->bytesperline = bpl;
> + plane_fmt->sizeimage = size;
> + }
> + }
> +
> + /* convert to non-MPLANE format.
> + * It's important since we want to unify non-MPLANE
> + * and MPLANE.
> + */
> + if (fmt->mplanes == 1)
> + pixm->plane_fmt[0].sizeimage = imagesize;
> +
> + if (!try) {
> + stream->cif_fmt_out = fmt;
> + stream->pixm = *pixm;
> + }
> +}
> +
> +void rkcif_stream_init(struct rkcif_device *dev)
> +{
> + struct rkcif_stream *stream = &dev->stream;
> + struct v4l2_pix_format_mplane pixm;
> +
> + memset(stream, 0, sizeof(*stream));
> + memset(&pixm, 0, sizeof(pixm));
> + stream->cifdev = dev;
> +
> + INIT_LIST_HEAD(&stream->buf_head);
> + spin_lock_init(&stream->vbq_lock);
> + stream->state = RKCIF_STATE_READY;
> + init_waitqueue_head(&stream->wq_stopped);
> +
> + /* Set default format */
> + pixm.pixelformat = V4L2_PIX_FMT_NV12;
> + pixm.width = RKCIF_DEFAULT_WIDTH;
> + pixm.height = RKCIF_DEFAULT_HEIGHT;
> + rkcif_set_fmt(stream, &pixm, false);
> +
> + stream->crop.left = 0;
> + stream->crop.top = 0;
> + stream->crop.width = 10;
> + stream->crop.height = 10;

I thought cropping wasn't supported yet? If that's indeed the case, then
just drop the 'crop' struct.

> +}
> +
> +static int rkcif_fh_open(struct file *filp)
> +{
> + struct video_device *vdev = video_devdata(filp);
> + struct rkcif_stream *stream = to_rkcif_stream(vdev);
> + struct rkcif_device *cifdev = stream->cifdev;
> +
> + rkcif_soft_reset(cifdev);

Dubious. What happens if you are streaming and from another shell you
run 'v4l2-ctl -D -d /dev/videoX'? That will open the device and call
rkcif_soft_reset(). That doesn't sound safe.

> +
> + return v4l2_fh_open(filp);
> +}
> +
> +static const struct v4l2_file_operations rkcif_fops = {
> + .open = rkcif_fh_open,
> + .release = vb2_fop_release,
> + .unlocked_ioctl = video_ioctl2,
> + .poll = vb2_fop_poll,
> + .mmap = vb2_fop_mmap,
> +};
> +
> +static int rkcif_enum_input(struct file *file, void *priv,
> + struct v4l2_input *input)
> +{
> + if (input->index > 0)
> + return -EINVAL;
> +
> + input->type = V4L2_INPUT_TYPE_CAMERA;
> + strlcpy(input->name, "Camera", sizeof(input->name));

Use strscpy instead of strcpy/strncpy/strlcpy. We standardized on that in the
media subsystem.

> +
> + return 0;
> +}
> +
> +static int rkcif_try_fmt_vid_cap_mplane(struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct rkcif_stream *stream = video_drvdata(file);
> +
> + rkcif_set_fmt(stream, &f->fmt.pix_mp, true);
> +
> + return 0;
> +}
> +
> +static int rkcif_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + const struct cif_output_fmt *fmt = NULL;
> +
> + if (f->index >= ARRAY_SIZE(out_fmts))
> + return -EINVAL;
> +
> + fmt = &out_fmts[f->index];
> + f->pixelformat = fmt->fourcc;
> +
> + return 0;
> +}
> +
> +static int rkcif_s_fmt_vid_cap_mplane(struct file *file,
> + void *priv, struct v4l2_format *f)
> +{
> + struct rkcif_stream *stream = video_drvdata(file);
> +
> + rkcif_set_fmt(stream, &f->fmt.pix_mp, false);
> +
> + return 0;
> +}
> +
> +static int rkcif_g_fmt_vid_cap_mplane(struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct rkcif_stream *stream = video_drvdata(file);
> +
> + f->fmt.pix_mp = stream->pixm;
> +
> + return 0;
> +}
> +
> +static int rkcif_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + struct rkcif_stream *stream = video_drvdata(file);
> + struct device *dev = stream->cifdev->dev;
> +
> + strlcpy(cap->driver, dev->driver->name, sizeof(cap->driver));
> + strlcpy(cap->card, dev->driver->name, sizeof(cap->card));
> + snprintf(cap->bus_info, sizeof(cap->bus_info),
> + "platform:%s", dev_name(dev));
> +
> + return 0;
> +}
> +
> +static int rkcif_enum_framesizes(struct file *file, void *fh,
> + struct v4l2_frmsizeenum *fsize)
> +{
> + struct rkcif_stream *stream = video_drvdata(file);
> + struct rkcif_device *dev = stream->cifdev;
> + struct v4l2_subdev_frame_size_enum fse = {
> + .index = fsize->index,
> + .which = V4L2_SUBDEV_FORMAT_ACTIVE,
> + };
> + const struct cif_output_fmt *fmt;
> + int ret;
> +
> + if (!dev->sensor.sd)
> + return -EINVAL;
> +
> + fmt = find_output_fmt(stream, fsize->pixel_format);
> + if (!fmt)
> + return -EINVAL;
> +
> + fse.code = fmt->mbus;
> +
> + ret = v4l2_subdev_call(dev->sensor.sd, pad, enum_frame_size,
> + NULL, &fse);
> + if (ret)
> + return ret;
> +
> + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
> + fsize->discrete.width = fse.max_width;
> + fsize->discrete.height = fse.max_height;
> +
> + return 0;
> +}
> +
> +static int rkcif_g_input(struct file *file, void *fh, unsigned int *i)
> +{
> + *i = 0;
> + return 0;
> +}
> +
> +static int rkcif_s_input(struct file *file, void *fh, unsigned int i)
> +{
> + if (i)
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static const struct v4l2_ioctl_ops rkcif_v4l2_ioctl_ops = {
> + .vidioc_reqbufs = vb2_ioctl_reqbufs,
> + .vidioc_querybuf = vb2_ioctl_querybuf,
> + .vidioc_create_bufs = vb2_ioctl_create_bufs,
> + .vidioc_qbuf = vb2_ioctl_qbuf,
> + .vidioc_expbuf = vb2_ioctl_expbuf,
> + .vidioc_dqbuf = vb2_ioctl_dqbuf,
> + .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
> + .vidioc_streamon = vb2_ioctl_streamon,
> + .vidioc_streamoff = vb2_ioctl_streamoff,
> +
> + .vidioc_enum_fmt_vid_cap = rkcif_enum_fmt_vid_cap,
> + .vidioc_try_fmt_vid_cap_mplane = rkcif_try_fmt_vid_cap_mplane,
> + .vidioc_s_fmt_vid_cap_mplane = rkcif_s_fmt_vid_cap_mplane,
> + .vidioc_g_fmt_vid_cap_mplane = rkcif_g_fmt_vid_cap_mplane,
> + .vidioc_querycap = rkcif_querycap,
> + .vidioc_enum_framesizes = rkcif_enum_framesizes,
> +
> + .vidioc_enum_input = rkcif_enum_input,
> + .vidioc_g_input = rkcif_g_input,
> + .vidioc_s_input = rkcif_s_input,
> +};
> +
> +void rkcif_unregister_stream_vdev(struct rkcif_device *dev)
> +{
> + struct rkcif_stream *stream = &dev->stream;
> +
> + media_entity_cleanup(&stream->vdev.entity);
> + video_unregister_device(&stream->vdev);
> +}
> +
> +int rkcif_register_stream_vdev(struct rkcif_device *dev)
> +{
> + struct rkcif_stream *stream = &dev->stream;
> + struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
> + struct video_device *vdev = &stream->vdev;
> + int ret;
> +
> + strlcpy(vdev->name, CIF_VIDEODEVICE_NAME, sizeof(vdev->name));
> + mutex_init(&stream->vlock);
> +
> + vdev->ioctl_ops = &rkcif_v4l2_ioctl_ops;
> + vdev->release = video_device_release_empty;
> + vdev->fops = &rkcif_fops;
> + vdev->minor = -1;
> + vdev->v4l2_dev = v4l2_dev;
> + vdev->lock = &stream->vlock;
> + vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
> + V4L2_CAP_STREAMING;
> + video_set_drvdata(vdev, stream);
> + vdev->vfl_dir = VFL_DIR_RX;
> + stream->pad.flags = MEDIA_PAD_FL_SINK;
> +
> + rkcif_init_vb2_queue(&stream->buf_queue, stream,
> + V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE |
> + V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + vdev->queue = &stream->buf_queue;
> + strscpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name));
> +
> + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);

Hmm, you aren't basing your code on the latest media git repo
(https://git.linuxtv.org//media_tree.git).

VFL_TYPE_GRABBER was renamed to VFL_TYPE_VIDEO.

> + if (ret < 0) {
> + v4l2_err(v4l2_dev,
> + "video_register_device failed with error %d\n", ret);
> + return ret;
> + }
> +
> + ret = media_entity_pads_init(&vdev->entity, 1, &stream->pad);
> + if (ret < 0)
> + goto unreg;
> +
> + return 0;
> +unreg:
> + video_unregister_device(vdev);
> + return ret;
> +}
> +
> +static void rkcif_vb_done_oneframe(struct rkcif_stream *stream,
> + struct vb2_v4l2_buffer *vb_done)
> +{
> + const struct cif_output_fmt *fmt = stream->cif_fmt_out;
> + u32 i;
> +
> + /* Dequeue a filled buffer */
> + for (i = 0; i < fmt->mplanes; i++) {
> + vb2_set_plane_payload(&vb_done->vb2_buf, i,
> + stream->pixm.plane_fmt[i].sizeimage);
> + }
> + vb_done->vb2_buf.timestamp = ktime_get_ns();
> + vb2_buffer_done(&vb_done->vb2_buf, VB2_BUF_STATE_DONE);
> +}
> +
> +void rkcif_irq_oneframe(struct rkcif_device *cif_dev)
> +{
> + struct rkcif_stream *stream = &cif_dev->stream;
> + u32 lastline, lastpix, ctl, cif_frmst, intstat;
> + void __iomem *base = cif_dev->base_addr;
> +
> + intstat = read_cif_reg(base, CIF_INTSTAT);
> + cif_frmst = read_cif_reg(base, CIF_FRAME_STATUS);
> + lastline = CIF_FETCH_Y_LAST_LINE(read_cif_reg(base, CIF_LAST_LINE));
> + lastpix = read_cif_reg(base, CIF_LAST_PIX);
> + ctl = read_cif_reg(base, CIF_CTRL);
> +
> + /* There are two irqs enabled:
> + * - PST_INF_FRAME_END: cif FIFO is ready, this is prior to FRAME_END
> + * - FRAME_END: cif has saved frame to memory, a frame ready
> + */
> +
> + if ((intstat & PST_INF_FRAME_END)) {
> + write_cif_reg(base, CIF_INTSTAT, PST_INF_FRAME_END_CLR);
> +
> + if (stream->stopping)
> + /* To stop CIF ASAP, before FRAME_END irq */
> + write_cif_reg(base, CIF_CTRL, ctl & (~ENABLE_CAPTURE));
> + }
> +
> + if ((intstat & LINE_ERR)) {
> + write_cif_reg(base, CIF_INTSTAT, LINE_ERR_CLR);
> +
> + if (stream->stopping) {
> + rkcif_stream_stop(stream);
> + stream->stopping = false;
> + wake_up(&stream->wq_stopped);
> + return;
> + }
> +
> + v4l2_err(&cif_dev->v4l2_dev,
> + "Bad frame, irq:0x%x frmst:0x%x size:%dx%d\n",
> + intstat, cif_frmst, lastline, lastpix);
> + /* Clear status to receive into the same buffer */
> + write_cif_reg(base, CIF_FRAME_STATUS, FRM0_STAT_CLS);
> + return;
> + }
> +
> +
> + if ((intstat & FRAME_END)) {
> + struct vb2_v4l2_buffer *vb_done = NULL;
> +
> + write_cif_reg(base, CIF_INTSTAT, FRAME_END_CLR);
> +
> + if (stream->stopping) {
> + rkcif_stream_stop(stream);
> + stream->stopping = false;
> + wake_up(&stream->wq_stopped);
> + return;
> + }
> +
> + if (lastline != stream->pixm.height ||
> + !(cif_frmst & CIF_F0_READY)) {
> + v4l2_err(&cif_dev->v4l2_dev,
> + "Bad frame, irq:0x%x frmst:0x%x size:%dx%d\n",
> + intstat, cif_frmst, lastline, lastpix);
> + /* Clear status to receive into the same buffer */
> + write_cif_reg(base, CIF_FRAME_STATUS, FRM0_STAT_CLS);
> + return;
> + }
> +
> + if (stream->curr_buf)
> + vb_done = &stream->curr_buf->vb;
> + rkcif_assign_new_buffer_oneframe(stream);
> +
> + /* In one-frame mode, must clear status manually to enable
> + * the next frame end irq
> + */
> + write_cif_reg(base, CIF_FRAME_STATUS, FRM0_STAT_CLS);
> +
> + if (vb_done)
> + rkcif_vb_done_oneframe(stream, vb_done);
> +
> + stream->frame_idx++;
> + }
> +}
> diff --git a/drivers/media/platform/rockchip/cif/dev.c b/drivers/media/platform/rockchip/cif/dev.c
> new file mode 100644
> index 000000000000..88f3833b7cdc
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/cif/dev.c
> @@ -0,0 +1,407 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Rockchip CIF Driver
> + *
> + * Copyright (C) 2018 Rockchip Electronics Co., Ltd.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_graph.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_reserved_mem.h>
> +#include <linux/reset.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/pinctrl/consumer.h>
> +#include <media/v4l2-fwnode.h>
> +
> +#include "dev.h"
> +#include "regs.h"
> +
> +#define RKCIF_VERNO_LEN 10
> +
> +struct cif_match_data {
> + int chip_id;
> + const char * const *clks;
> + const char * const *rsts;
> + int clks_num;
> + int rsts_num;
> +};
> +
> +static int rkcif_create_links(struct rkcif_device *dev)
> +{
> + struct v4l2_subdev *sd = dev->sensor.sd;
> + int ret;
> +
> + ret = media_entity_get_fwnode_pad(&sd->entity, sd->fwnode,
> + MEDIA_PAD_FL_SOURCE);
> + if (ret)
> + return ret;
> +
> + ret = media_create_pad_link(&sd->entity, 0,
> + &dev->stream.vdev.entity, 0,
> + MEDIA_LNK_FL_ENABLED);
> + if (ret) {
> + dev_err(dev->dev, "failed to create link");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
> +{
> + struct rkcif_device *dev;
> + int ret;
> +
> + dev = container_of(notifier, struct rkcif_device, notifier);
> +
> + mutex_lock(&dev->media_dev.graph_mutex);
> +
> + ret = rkcif_create_links(dev);
> + if (ret < 0)
> + goto unlock;
> +
> + ret = v4l2_device_register_subdev_nodes(&dev->v4l2_dev);
> + if (ret < 0)
> + goto unlock;
> +
> +unlock:
> + mutex_unlock(&dev->media_dev.graph_mutex);
> + return ret;
> +}
> +
> +static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
> + struct v4l2_subdev *subdev,
> + struct v4l2_async_subdev *asd)
> +{
> + struct rkcif_device *cif_dev = container_of(notifier,
> + struct rkcif_device, notifier);
> +
> + int pad;
> +
> + cif_dev->sensor.sd = subdev;
> + pad = media_entity_get_fwnode_pad(&subdev->entity, subdev->fwnode,
> + MEDIA_PAD_FL_SOURCE);
> + if (pad < 0)
> + return pad;
> +
> + cif_dev->sensor.pad = pad;
> +
> + return 0;
> +}
> +
> +static const struct v4l2_async_notifier_operations subdev_notifier_ops = {
> + .bound = subdev_notifier_bound,
> + .complete = subdev_notifier_complete,
> +};
> +
> +static int cif_subdev_notifier(struct rkcif_device *cif_dev)
> +{
> + struct v4l2_async_notifier *ntf = &cif_dev->notifier;
> + struct device *dev = cif_dev->dev;
> + struct v4l2_fwnode_endpoint vep = {
> + .bus_type = V4L2_MBUS_PARALLEL,
> + };
> + struct fwnode_handle *ep;
> + int ret;
> +
> + v4l2_async_notifier_init(ntf);
> +
> + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0,
> + FWNODE_GRAPH_ENDPOINT_NEXT);
> + if (!ep)
> + return -EINVAL;
> +
> + ret = v4l2_fwnode_endpoint_parse(ep, &vep);
> + if (ret)
> + return ret;
> +
> + ret = v4l2_async_notifier_add_fwnode_remote_subdev(ntf, ep,
> + &cif_dev->asd);
> + if (ret)
> + return ret;
> +
> + ntf->ops = &subdev_notifier_ops;
> +
> + fwnode_handle_put(ep);
> +
> + ret = v4l2_async_notifier_register(&cif_dev->v4l2_dev, ntf);
> + return ret;
> +}
> +
> +static int rkcif_register_platform_subdevs(struct rkcif_device *cif_dev)
> +{
> + int ret;
> +
> + ret = rkcif_register_stream_vdev(cif_dev);

You must wait with registering the video device (and media device as well
for that matter) until all subdevs are ready. So this should be moved to
subdev_notifier_complete.

Otherwise device nodes are created that cannot be used yet because the
subdevs aren't ready yet.

> + if (ret < 0)
> + return ret;
> +
> + ret = cif_subdev_notifier(cif_dev);
> + if (ret < 0) {
> + v4l2_err(&cif_dev->v4l2_dev,
> + "Failed to register subdev notifier(%d)\n", ret);
> + rkcif_unregister_stream_vdev(cif_dev);
> + }
> +
> + return 0;
> +}
> +
> +static const char * const px30_cif_clks[] = {
> + "aclk_cif",
> + "hclk_cif",
> + "pclk_cif",
> + "cif_out",
> +};
> +
> +static const char * const px30_cif_rsts[] = {
> + "rst_cif_a",
> + "rst_cif_h",
> + "rst_cif_pclkin",
> +};
> +
> +static const struct cif_match_data px30_cif_match_data = {
> + .chip_id = CHIP_PX30_CIF,
> + .clks = px30_cif_clks,
> + .clks_num = ARRAY_SIZE(px30_cif_clks),
> + .rsts = px30_cif_rsts,
> + .rsts_num = ARRAY_SIZE(px30_cif_rsts),
> +};
> +
> +static const struct of_device_id rkcif_plat_of_match[] = {
> + {
> + .compatible = "rockchip,px30-cif",
> + .data = &px30_cif_match_data,
> + },
> + {},
> +};
> +
> +static irqreturn_t rkcif_irq_handler(int irq, void *ctx)
> +{
> + struct device *dev = ctx;
> + struct rkcif_device *cif_dev = dev_get_drvdata(dev);
> +
> + rkcif_irq_oneframe(cif_dev);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static void rkcif_disable_sys_clk(struct rkcif_device *cif_dev)
> +{
> + int i;
> +
> + for (i = cif_dev->clk_size - 1; i >= 0; i--)
> + clk_disable_unprepare(cif_dev->clks[i]);
> +}
> +
> +static int rkcif_enable_sys_clk(struct rkcif_device *cif_dev)
> +{
> + int i, ret = -EINVAL;
> +
> + for (i = 0; i < cif_dev->clk_size; i++) {
> + ret = clk_prepare_enable(cif_dev->clks[i]);
> +
> + if (ret < 0)
> + goto err;
> + }
> +
> + return 0;
> +
> +err:
> + for (--i; i >= 0; --i)
> + clk_disable_unprepare(cif_dev->clks[i]);
> +
> + return ret;
> +}
> +
> +void rkcif_soft_reset(struct rkcif_device *cif_dev)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(cif_dev->cif_rst); i++)
> + if (cif_dev->cif_rst[i])
> + reset_control_assert(cif_dev->cif_rst[i]);
> + udelay(5);
> + for (i = 0; i < ARRAY_SIZE(cif_dev->cif_rst); i++)
> + if (cif_dev->cif_rst[i])
> + reset_control_deassert(cif_dev->cif_rst[i]);
> +}
> +
> +static int rkcif_plat_probe(struct platform_device *pdev)
> +{
> + const struct of_device_id *match;
> + struct device_node *node = pdev->dev.of_node;
> + struct device *dev = &pdev->dev;
> + struct v4l2_device *v4l2_dev;
> + struct rkcif_device *cif_dev;
> + const struct cif_match_data *data;
> + struct resource *res;
> + int i, ret, irq;
> +
> + match = of_match_node(rkcif_plat_of_match, node);
> + if (IS_ERR(match))
> + return PTR_ERR(match);
> +
> + cif_dev = devm_kzalloc(dev, sizeof(*cif_dev), GFP_KERNEL);
> + if (!cif_dev)
> + return -ENOMEM;
> +
> + dev_set_drvdata(dev, cif_dev);
> + cif_dev->dev = dev;
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0)
> + return irq;
> +
> + ret = devm_request_irq(dev, irq, rkcif_irq_handler, IRQF_SHARED,
> + dev_driver_string(dev), dev);
> + if (ret < 0) {
> + dev_err(dev, "request irq failed: %d\n", ret);
> + return ret;
> + }
> +
> + cif_dev->irq = irq;
> + data = match->data;
> + cif_dev->chip_id = data->chip_id;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + cif_dev->base_addr = devm_ioremap_resource(dev, res);
> +
> + if (IS_ERR(cif_dev->base_addr))
> + return PTR_ERR(cif_dev->base_addr);
> +
> + if (data->clks_num > RKCIF_MAX_BUS_CLK ||
> + data->rsts_num > RKCIF_MAX_RESET) {
> + dev_err(dev, "out of range: clks(%d %d) rsts(%d %d)\n",
> + data->clks_num, RKCIF_MAX_BUS_CLK,
> + data->rsts_num, RKCIF_MAX_RESET);
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < data->clks_num; i++) {
> + struct clk *clk = devm_clk_get(dev, data->clks[i]);
> +
> + if (IS_ERR(clk)) {
> + dev_err(dev, "failed to get %s\n", data->clks[i]);
> + return PTR_ERR(clk);
> + }
> +
> + cif_dev->clks[i] = clk;
> + }
> +
> + cif_dev->clk_size = data->clks_num;
> +
> + for (i = 0; i < data->rsts_num; i++) {
> + struct reset_control *rst =
> + devm_reset_control_get(dev, data->rsts[i]);
> + if (IS_ERR(rst)) {
> + dev_err(dev, "failed to get %s\n", data->rsts[i]);
> + return PTR_ERR(rst);
> + }
> + cif_dev->cif_rst[i] = rst;
> + }
> +
> + /* Initialize the stream */
> + rkcif_stream_init(cif_dev);
> +
> + strlcpy(cif_dev->media_dev.model, "rkcif",
> + sizeof(cif_dev->media_dev.model));
> + cif_dev->media_dev.dev = &pdev->dev;
> + v4l2_dev = &cif_dev->v4l2_dev;
> + v4l2_dev->mdev = &cif_dev->media_dev;
> + strlcpy(v4l2_dev->name, "rkcif", sizeof(v4l2_dev->name));
> + v4l2_ctrl_handler_init(&cif_dev->ctrl_handler, 8);
> + v4l2_dev->ctrl_handler = &cif_dev->ctrl_handler;
> +
> + ret = v4l2_device_register(cif_dev->dev, &cif_dev->v4l2_dev);
> + if (ret < 0)
> + return ret;
> +
> + media_device_init(&cif_dev->media_dev);
> +
> + ret = media_device_register(&cif_dev->media_dev);
> + if (ret < 0) {
> + v4l2_err(v4l2_dev, "Failed to register media device: %d\n",
> + ret);
> + goto err_unreg_v4l2_dev;
> + }
> +
> + /* create & register platefom subdev (from of_node) */

platefom -> platform

> + ret = rkcif_register_platform_subdevs(cif_dev);
> + if (ret < 0)
> + goto err_unreg_media_dev;
> +
> + ret = of_reserved_mem_device_init(dev);
> + if (ret)
> + v4l2_warn(v4l2_dev, "No reserved memory region assign to CIF\n");
> +
> + pm_runtime_enable(&pdev->dev);
> +
> + return 0;
> +
> +err_unreg_media_dev:
> + media_device_unregister(&cif_dev->media_dev);
> +err_unreg_v4l2_dev:
> + v4l2_device_unregister(&cif_dev->v4l2_dev);
> + return ret;
> +}
> +
> +static int rkcif_plat_remove(struct platform_device *pdev)
> +{
> + struct rkcif_device *cif_dev = platform_get_drvdata(pdev);
> +
> + pm_runtime_disable(&pdev->dev);
> +
> + media_device_unregister(&cif_dev->media_dev);
> + v4l2_device_unregister(&cif_dev->v4l2_dev);
> + rkcif_unregister_stream_vdev(cif_dev);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused rkcif_runtime_suspend(struct device *dev)
> +{
> + struct rkcif_device *cif_dev = dev_get_drvdata(dev);
> +
> + rkcif_disable_sys_clk(cif_dev);
> +
> + return pinctrl_pm_select_sleep_state(dev);
> +}
> +
> +static int __maybe_unused rkcif_runtime_resume(struct device *dev)
> +{
> + struct rkcif_device *cif_dev = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = pinctrl_pm_select_default_state(dev);
> + if (ret < 0)
> + return ret;
> + rkcif_enable_sys_clk(cif_dev);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops rkcif_plat_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> + pm_runtime_force_resume)
> + SET_RUNTIME_PM_OPS(rkcif_runtime_suspend, rkcif_runtime_resume, NULL)
> +};
> +
> +static struct platform_driver rkcif_plat_drv = {
> + .driver = {
> + .name = CIF_DRIVER_NAME,
> + .of_match_table = of_match_ptr(rkcif_plat_of_match),
> + .pm = &rkcif_plat_pm_ops,
> + },
> + .probe = rkcif_plat_probe,
> + .remove = rkcif_plat_remove,
> +};
> +
> +module_platform_driver(rkcif_plat_drv);
> +MODULE_AUTHOR("Rockchip Camera/ISP team");
> +MODULE_DESCRIPTION("Rockchip CIF platform driver");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/media/platform/rockchip/cif/dev.h b/drivers/media/platform/rockchip/cif/dev.h
> new file mode 100644
> index 000000000000..3dc47d461d04
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/cif/dev.h
> @@ -0,0 +1,208 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Rockchip CIF Driver
> + *
> + * Copyright (C) 2018 Rockchip Electronics Co., Ltd.
> + */
> +
> +#ifndef _RKCIF_DEV_H
> +#define _RKCIF_DEV_H
> +
> +#include <linux/mutex.h>
> +#include <media/media-device.h>
> +#include <media/media-entity.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +#include <media/videobuf2-v4l2.h>
> +
> +#define CIF_DRIVER_NAME "rkcif"
> +#define CIF_VIDEODEVICE_NAME "stream_cif"
> +
> +#define RKCIF_MAX_BUS_CLK 8
> +#define RKCIF_MAX_SENSOR 2
> +#define RKCIF_MAX_RESET 5
> +#define RKCIF_MAX_CSI_CHANNEL 4
> +
> +#define RKCIF_DEFAULT_WIDTH 640
> +#define RKCIF_DEFAULT_HEIGHT 480
> +
> +#define write_cif_reg(base, addr, val) writel(val, (addr) + (base))
> +#define read_cif_reg(base, addr) readl((addr) + (base))
> +
> +#define write_csihost_reg(base, addr, val) writel(val, (addr) + (base))
> +#define read_csihost_reg(base, addr) readl((addr) + (base))
> +
> +enum rkcif_state {
> + RKCIF_STATE_DISABLED,
> + RKCIF_STATE_READY,
> + RKCIF_STATE_STREAMING
> +};
> +
> +enum rkcif_chip_id {
> + CHIP_PX30_CIF,
> + CHIP_RK1808_CIF,
> + CHIP_RK3128_CIF,
> + CHIP_RK3288_CIF
> +};
> +
> +enum host_type_t {
> + RK_CSI_RXHOST,
> + RK_DSI_RXHOST
> +};
> +
> +struct rkcif_buffer {
> + struct vb2_v4l2_buffer vb;
> + struct list_head queue;
> + union {
> + u32 buff_addr[VIDEO_MAX_PLANES];
> + void *vaddr[VIDEO_MAX_PLANES];
> + };
> +};
> +
> +struct rkcif_dummy_buffer {
> + void *vaddr;
> + dma_addr_t dma_addr;
> + u32 size;
> +};
> +
> +extern int rkcif_debug;
> +
> +static inline struct rkcif_buffer *to_rkcif_buffer(struct vb2_v4l2_buffer *vb)
> +{
> + return container_of(vb, struct rkcif_buffer, vb);
> +}
> +
> +/*
> + * struct rkcif_sensor_info - Sensor infomations
> + * @mbus: media bus configuration
> + */
> +struct rkcif_sensor_info {
> + struct v4l2_subdev *sd;
> + int pad;
> + struct v4l2_mbus_config mbus;
> + int lanes;
> +};
> +
> +/*
> + * struct cif_output_fmt - The output format
> + *
> + * @fourcc: pixel format in fourcc
> + * @cplanes: number of colour planes
> + * @fmt_val: the fmt val corresponding to CIF_FOR register
> + * @bpp: bits per pixel for each cplanes
> + */
> +struct cif_output_fmt {
> + u32 fourcc;
> + u32 mbus;
> + u8 cplanes;
> + u8 mplanes;
> + u32 fmt_val;
> + u8 bpp[VIDEO_MAX_PLANES];
> +};
> +
> +enum cif_fmt_type {
> + CIF_FMT_TYPE_YUV = 0,
> + CIF_FMT_TYPE_RAW,
> +};
> +
> +/*
> + * struct cif_input_fmt - The input mbus format from sensor
> + *
> + * @mbus_code: mbus format
> + * @dvp_fmt_val: the fmt val corresponding to CIF_FOR register
> + * @csi_fmt_val: the fmt val corresponding to CIF_CSI_ID_CTRL
> + * @field: the field type of the input from sensor
> + */
> +struct cif_input_fmt {
> + u32 mbus_code;
> + u32 dvp_fmt_val;
> + u32 csi_fmt_val;
> + enum cif_fmt_type fmt_type;
> + enum v4l2_field field;
> +};
> +
> +/*
> + * struct rkcif_stream - Stream states TODO
> + *
> + * @vbq_lock: lock to protect buf_queue
> + * @buf_queue: queued buffer list
> + * @dummy_buf: dummy space to store dropped data
> + *
> + * rkcif use shadowsock registers, so it need two buffer at a time
> + * @curr_buf: the buffer used for current frame
> + * @next_buf: the buffer used for next frame
> + */
> +struct rkcif_stream {
> + struct rkcif_device *cifdev;
> + enum rkcif_state state;
> + bool stopping;
> + wait_queue_head_t wq_stopped;
> + int frame_idx;
> + int frame_phase;
> +
> + /* lock between irq and buf_queue */
> + spinlock_t vbq_lock;
> + struct vb2_queue buf_queue;
> + struct list_head buf_head;
> + struct rkcif_dummy_buffer dummy_buf;
> + struct rkcif_buffer *curr_buf;
> + struct rkcif_buffer *next_buf;
> +
> + /* vfd lock */
> + struct mutex vlock;
> + struct video_device vdev;
> + /* TODO: pad for dvp and mipi separately? */
> + struct media_pad pad;
> +
> + const struct cif_output_fmt *cif_fmt_out;
> + const struct cif_input_fmt *cif_fmt_in;
> + struct v4l2_pix_format_mplane pixm;
> + struct v4l2_rect crop;
> + int crop_enable;
> +};
> +
> +static inline struct rkcif_stream *to_rkcif_stream(struct video_device *vdev)
> +{
> + return container_of(vdev, struct rkcif_stream, vdev);
> +}
> +
> +/*
> + * struct rkcif_device - ISP platform device
> + * @base_addr: base register address
> + * @active_sensor: sensor in-use, set when streaming on
> + * @stream: capture video device
> + */
> +struct rkcif_device {
> + struct list_head list;
> + struct device *dev;
> + int irq;
> + void __iomem *base_addr;
> + void __iomem *csi_base;
> + struct clk *clks[RKCIF_MAX_BUS_CLK];
> + int clk_size;
> + struct vb2_alloc_ctx *alloc_ctx;
> + bool iommu_en;
> + struct iommu_domain *domain;
> + struct reset_control *cif_rst[RKCIF_MAX_RESET];
> +
> + struct v4l2_device v4l2_dev;
> + struct media_device media_dev;
> + struct v4l2_ctrl_handler ctrl_handler;
> + struct v4l2_async_notifier notifier;
> + struct v4l2_async_subdev asd;
> + struct rkcif_sensor_info sensor;
> +
> + struct rkcif_stream stream;
> +
> + int chip_id;
> +};
> +
> +void rkcif_unregister_stream_vdev(struct rkcif_device *dev);
> +int rkcif_register_stream_vdev(struct rkcif_device *dev);
> +void rkcif_stream_init(struct rkcif_device *dev);
> +
> +void rkcif_irq_oneframe(struct rkcif_device *cif_dev);
> +void rkcif_irq_pingpong(struct rkcif_device *cif_dev);
> +void rkcif_soft_reset(struct rkcif_device *cif_dev);
> +
> +#endif
> diff --git a/drivers/media/platform/rockchip/cif/regs.h b/drivers/media/platform/rockchip/cif/regs.h
> new file mode 100644
> index 000000000000..5e0f926c70d3
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/cif/regs.h
> @@ -0,0 +1,256 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Rockchip CIF Driver
> + *
> + * Copyright (C) 2018 Rockchip Electronics Co., Ltd.
> + */
> +
> +#ifndef _RKCIF_REGS_H
> +#define _RKCIF_REGS_H
> +
> +/* CIF Reg Offset */
> +#define CIF_CTRL 0x00
> +#define CIF_INTEN 0x04
> +#define CIF_INTSTAT 0x08
> +#define CIF_FOR 0x0c
> +#define CIF_LINE_NUM_ADDR 0x10
> +#define CIF_FRM0_ADDR_Y 0x14
> +#define CIF_FRM0_ADDR_UV 0x18
> +#define CIF_FRM1_ADDR_Y 0x1c
> +#define CIF_FRM1_ADDR_UV 0x20
> +#define CIF_VIR_LINE_WIDTH 0x24
> +#define CIF_SET_SIZE 0x28
> +#define CIF_SCM_ADDR_Y 0x2c
> +#define CIF_SCM_ADDR_U 0x30
> +#define CIF_SCM_ADDR_V 0x34
> +#define CIF_WB_UP_FILTER 0x38
> +#define CIF_WB_LOW_FILTER 0x3c
> +#define CIF_WBC_CNT 0x40
> +#define CIF_CROP 0x44
> +#define CIF_SCL_CTRL 0x48
> +#define CIF_SCL_DST 0x4c
> +#define CIF_SCL_FCT 0x50
> +#define CIF_SCL_VALID_NUM 0x54
> +#define CIF_LINE_LOOP_CTR 0x58
> +#define CIF_FRAME_STATUS 0x60
> +#define CIF_CUR_DST 0x64
> +#define CIF_LAST_LINE 0x68
> +#define CIF_LAST_PIX 0x6c
> +
> +/* RK1808 CIF CSI Registers Offset */
> +#define CIF_CSI_ID0_CTRL0 0x80
> +#define CIF_CSI_ID0_CTRL1 0x84
> +#define CIF_CSI_ID1_CTRL0 0x88
> +#define CIF_CSI_ID1_CTRL1 0x8c
> +#define CIF_CSI_ID2_CTRL0 0x90
> +#define CIF_CSI_ID2_CTRL1 0x94
> +#define CIF_CSI_ID3_CTRL0 0x98
> +#define CIF_CSI_ID3_CTRL1 0x9c
> +#define CIF_CSI_WATER_LINE 0xa0
> +#define CIF_CSI_FRM0_ADDR_Y_ID0 0xa4
> +#define CIF_CSI_FRM1_ADDR_Y_ID0 0xa8
> +#define CIF_CSI_FRM0_ADDR_UV_ID0 0xac
> +#define CIF_CSI_FRM1_ADDR_UV_ID0 0xb0
> +#define CIF_CSI_FRM0_VLW_Y_ID0 0xb4
> +#define CIF_CSI_FRM1_VLW_Y_ID0 0xb8
> +#define CIF_CSI_FRM0_VLW_UV_ID0 0xbc
> +#define CIF_CSI_FRM1_VLW_UV_ID0 0xc0
> +#define CIF_CSI_FRM0_ADDR_Y_ID1 0xc4
> +#define CIF_CSI_FRM1_ADDR_Y_ID1 0xc8
> +#define CIF_CSI_FRM0_ADDR_UV_ID1 0xcc
> +#define CIF_CSI_FRM1_ADDR_UV_ID1 0xd0
> +#define CIF_CSI_FRM0_VLW_Y_ID1 0xd4
> +#define CIF_CSI_FRM1_VLW_Y_ID1 0xd8
> +#define CIF_CSI_FRM0_VLW_UV_ID1 0xdc
> +#define CIF_CSI_FRM1_VLW_UV_ID1 0xe0
> +#define CIF_CSI_FRM0_ADDR_Y_ID2 0xe4
> +#define CIF_CSI_FRM1_ADDR_Y_ID2 0xe8
> +#define CIF_CSI_FRM0_ADDR_UV_ID2 0xec
> +#define CIF_CSI_FRM1_ADDR_UV_ID2 0xf0
> +#define CIF_CSI_FRM0_VLW_Y_ID2 0xf4
> +#define CIF_CSI_FRM1_VLW_Y_ID2 0xf8
> +#define CIF_CSI_FRM0_VLW_UV_ID2 0xfc
> +#define CIF_CSI_FRM1_VLW_UV_ID2 0x100
> +#define CIF_CSI_FRM0_ADDR_Y_ID3 0x104
> +#define CIF_CSI_FRM1_ADDR_Y_ID3 0x108
> +#define CIF_CSI_FRM0_ADDR_UV_ID3 0x10c
> +#define CIF_CSI_FRM1_ADDR_UV_ID3 0x110
> +#define CIF_CSI_FRM0_VLW_Y_ID3 0x114
> +#define CIF_CSI_FRM1_VLW_Y_ID3 0x118
> +#define CIF_CSI_FRM0_VLW_UV_ID3 0x11c
> +#define CIF_CSI_FRM1_VLW_UV_ID3 0x120
> +#define CIF_CSI_INTEN 0x124
> +#define CIF_CSI_INTSTAT 0x128
> +#define CIF_CSI_LINE_INT_NUM_ID0_1 0x12c
> +#define CIF_CSI_LINE_INT_NUM_ID2_3 0x130
> +#define CIF_CSI_LINE_CNT_ID0_1 0x134
> +#define CIF_CSI_LINE_CNT_ID2_3 0x138
> +#define CIF_CSI_ID0_CROP_START 0x13c
> +#define CIF_CSI_ID1_CROP_START 0x140
> +#define CIF_CSI_ID2_CROP_START 0x144
> +#define CIF_CSI_ID3_CROP_START 0x148
> +
> +/* The key register bit description */
> +
> +/* CIF_CTRL Reg */
> +#define DISABLE_CAPTURE (0x0 << 0)
> +#define ENABLE_CAPTURE (0x1 << 0)
> +#define MODE_ONEFRAME (0x0 << 1)
> +#define MODE_PINGPONG (0x1 << 1)
> +#define MODE_LINELOOP (0x2 << 1)
> +#define AXI_BURST_16 (0xF << 12)
> +
> +/* CIF_INTEN */
> +#define INTEN_DISABLE (0x0 << 0)
> +#define FRAME_END_EN (0x1 << 0)
> +#define LINE_ERR_EN (0x1 << 2)
> +#define BUS_ERR_EN (0x1 << 6)
> +#define SCL_ERR_EN (0x1 << 7)
> +#define PST_INF_FRAME_END_EN (0x1 << 9)
> +
> +/* CIF INTSTAT */
> +#define INTSTAT_CLS (0x3FF)
> +#define FRAME_END (0x01 << 0)
> +#define LINE_ERR (0x01 << 2)
> +#define PST_INF_FRAME_END (0x01 << 9)
> +#define FRAME_END_CLR (0x01 << 0)
> +#define LINE_ERR_CLR (0x01 << 2)
> +#define PST_INF_FRAME_END_CLR (0x01 << 9)
> +#define INTSTAT_ERR (0xFC)
> +
> +/* FRAME STATUS */
> +#define FRAME_STAT_CLS 0x00
> +#define FRM0_STAT_CLS 0x20 /* write 0 to clear frame 0 */
> +
> +/* CIF FORMAT */
> +#define VSY_HIGH_ACTIVE (0x01 << 0)
> +#define VSY_LOW_ACTIVE (0x00 << 0)
> +#define HSY_LOW_ACTIVE (0x01 << 1)
> +#define HSY_HIGH_ACTIVE (0x00 << 1)
> +#define INPUT_MODE_YUV (0x00 << 2)
> +#define INPUT_MODE_PAL (0x02 << 2)
> +#define INPUT_MODE_NTSC (0x03 << 2)
> +#define INPUT_MODE_BT1120 (0x07 << 2)
> +#define INPUT_MODE_RAW (0x04 << 2)
> +#define INPUT_MODE_JPEG (0x05 << 2)
> +#define INPUT_MODE_MIPI (0x06 << 2)
> +#define YUV_INPUT_ORDER_UYVY (0x00 << 5)
> +#define YUV_INPUT_ORDER_YVYU (0x01 << 5)
> +#define YUV_INPUT_ORDER_VYUY (0x10 << 5)
> +#define YUV_INPUT_ORDER_YUYV (0x03 << 5)
> +#define YUV_INPUT_422 (0x00 << 7)
> +#define YUV_INPUT_420 (0x01 << 7)
> +#define INPUT_420_ORDER_EVEN (0x00 << 8)
> +#define INPUT_420_ORDER_ODD (0x01 << 8)
> +#define CCIR_INPUT_ORDER_ODD (0x00 << 9)
> +#define CCIR_INPUT_ORDER_EVEN (0x01 << 9)
> +#define RAW_DATA_WIDTH_8 (0x00 << 11)
> +#define RAW_DATA_WIDTH_10 (0x01 << 11)
> +#define RAW_DATA_WIDTH_12 (0x02 << 11)
> +#define YUV_OUTPUT_422 (0x00 << 16)
> +#define YUV_OUTPUT_420 (0x01 << 16)
> +#define OUTPUT_420_ORDER_EVEN (0x00 << 17)
> +#define OUTPUT_420_ORDER_ODD (0x01 << 17)
> +#define RAWD_DATA_LITTLE_ENDIAN (0x00 << 18)
> +#define RAWD_DATA_BIG_ENDIAN (0x01 << 18)
> +#define UV_STORAGE_ORDER_UVUV (0x00 << 19)
> +#define UV_STORAGE_ORDER_VUVU (0x01 << 19)
> +#define BT1120_CLOCK_SINGLE_EDGES (0x00 << 24)
> +#define BT1120_CLOCK_DOUBLE_EDGES (0x01 << 24)
> +#define BT1120_TRANSMIT_INTERFACE (0x00 << 25)
> +#define BT1120_TRANSMIT_PROGRESS (0x01 << 25)
> +#define BT1120_YC_SWAP (0x01 << 26)
> +
> +/* CIF_SCL_CTRL */
> +#define ENABLE_SCL_DOWN (0x01 << 0)
> +#define DISABLE_SCL_DOWN (0x00 << 0)
> +#define ENABLE_SCL_UP (0x01 << 1)
> +#define DISABLE_SCL_UP (0x00 << 1)
> +#define ENABLE_YUV_16BIT_BYPASS (0x01 << 4)
> +#define DISABLE_YUV_16BIT_BYPASS (0x00 << 4)
> +#define ENABLE_RAW_16BIT_BYPASS (0x01 << 5)
> +#define DISABLE_RAW_16BIT_BYPASS (0x00 << 5)
> +#define ENABLE_32BIT_BYPASS (0x01 << 6)
> +#define DISABLE_32BIT_BYPASS (0x00 << 6)
> +
> +/* CIF_INTSTAT */
> +#define CIF_F0_READY (0x01 << 0)
> +#define CIF_F1_READY (0x01 << 1)
> +
> +/* CIF CROP */
> +#define CIF_CROP_Y_SHIFT 16
> +#define CIF_CROP_X_SHIFT 0
> +
> +/* CIF_CSI_ID_CTRL0 */
> +#define CSI_DISABLE_CAPTURE (0x0 << 0)
> +#define CSI_ENABLE_CAPTURE (0x1 << 0)
> +#define CSI_WRDDR_TYPE_RAW8 (0x0 << 1)
> +#define CSI_WRDDR_TYPE_RAW10 (0x1 << 1)
> +#define CSI_WRDDR_TYPE_RAW12 (0x2 << 1)
> +#define CSI_WRDDR_TYPE_RGB888 (0x3 << 1)
> +#define CSI_WRDDR_TYPE_YUV422 (0x4 << 1)
> +#define CSI_DISABLE_COMMAND_MODE (0x0 << 4)
> +#define CSI_ENABLE_COMMAND_MODE (0x1 << 4)
> +#define CSI_DISABLE_CROP (0x0 << 5)
> +#define CSI_ENABLE_CROP (0x1 << 5)
> +
> +/* CIF_CSI_INTEN */
> +#define CSI_FRAME0_START_INTEN(id) (0x1 << ((id) * 2))
> +#define CSI_FRAME1_START_INTEN(id) (0x1 << ((id) * 2 + 1))
> +#define CSI_FRAME0_END_INTEN(id) (0x1 << ((id) * 2 + 8))
> +#define CSI_FRAME1_END_INTEN(id) (0x1 << ((id) * 2 + 9))
> +#define CSI_DMA_Y_FIFO_OVERFLOW_INTEN (0x1 << 16)
> +#define CSI_DMA_UV_FIFO_OVERFLOW_INTEN (0x1 << 17)
> +#define CSI_CONFIG_FIFO_OVERFLOW_INTEN (0x1 << 18)
> +#define CSI_BANDWIDTH_LACK_INTEN (0x1 << 19)
> +#define CSI_RX_FIFO_OVERFLOW_INTEN (0x1 << 20)
> +#define CSI_ALL_FRAME_START_INTEN (0xff << 0)
> +#define CSI_ALL_FRAME_END_INTEN (0xff << 8)
> +#define CSI_ALL_ERROR_INTEN (0x1f << 16)
> +
> +/* CIF_CSI_INTSTAT */
> +#define CSI_FRAME0_START_ID0 (0x1 << 0)
> +#define CSI_FRAME1_START_ID0 (0x1 << 1)
> +#define CSI_FRAME0_START_ID1 (0x1 << 2)
> +#define CSI_FRAME1_START_ID1 (0x1 << 3)
> +#define CSI_FRAME0_START_ID2 (0x1 << 4)
> +#define CSI_FRAME1_START_ID2 (0x1 << 5)
> +#define CSI_FRAME0_START_ID3 (0x1 << 6)
> +#define CSI_FRAME1_START_ID3 (0x1 << 7)
> +#define CSI_FRAME0_END_ID0 (0x1 << 8)
> +#define CSI_FRAME1_END_ID0 (0x1 << 9)
> +#define CSI_FRAME0_END_ID1 (0x1 << 10)
> +#define CSI_FRAME1_END_ID1 (0x1 << 11)
> +#define CSI_FRAME0_END_ID2 (0x1 << 12)
> +#define CSI_FRAME1_END_ID2 (0x1 << 13)
> +#define CSI_FRAME0_END_ID3 (0x1 << 14)
> +#define CSI_FRAME1_END_ID3 (0x1 << 15)
> +#define CSI_DMA_Y_FIFO_OVERFLOW (0x1 << 16)
> +#define CSI_DMA_UV_FIFO_OVERFLOW (0x1 << 17)
> +#define CSI_CONFIG_FIFO_OVERFLOW (0x1 << 18)
> +#define CSI_BANDWIDTH_LACK (0x1 << 19)
> +#define CSI_RX_FIFO_OVERFLOW (0x1 << 20)
> +
> +#define CSI_FIFO_OVERFLOW (CSI_DMA_Y_FIFO_OVERFLOW | \
> + CSI_DMA_UV_FIFO_OVERFLOW | \
> + CSI_CONFIG_FIFO_OVERFLOW | \
> + CSI_RX_FIFO_OVERFLOW)
> +
> +/* CSI Host Registers Define */
> +#define CSIHOST_N_LANES 0x04
> +#define CSIHOST_PHY_RSTZ 0x0c
> +#define CSIHOST_RESETN 0x10
> +#define CSIHOST_ERR1 0x20
> +#define CSIHOST_ERR2 0x24
> +#define CSIHOST_MSK1 0x28
> +#define CSIHOST_MSK2 0x2c
> +#define CSIHOST_CONTROL 0x40
> +
> +#define SW_CPHY_EN(x) ((x) << 0)
> +#define SW_DSI_EN(x) ((x) << 4)
> +#define SW_DATATYPE_FS(x) ((x) << 8)
> +#define SW_DATATYPE_FE(x) ((x) << 14)
> +#define SW_DATATYPE_LS(x) ((x) << 20)
> +#define SW_DATATYPE_LE(x) ((x) << 26)
> +
> +#endif
>

Regards,

Hans