Hi Ming,
On 12/7/21 09:24, Ming Qian wrote:
> vpu_v4l2.c implements the v4l2 m2m driver methods.
> vpu_helpers.c implements the common helper functions
> vpu_color.c converts the v4l2 colorspace with
> the VUI parameters that specified by ITU-T | ISO/IEC
>
> Signed-off-by: Ming Qian <ming.qian@xxxxxxx>
> Signed-off-by: Shijie Qin <shijie.qin@xxxxxxx>
> Signed-off-by: Zhou Peng <eagle.zhou@xxxxxxx>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> ---
> drivers/media/platform/amphion/vpu_color.c | 186 +++++
> drivers/media/platform/amphion/vpu_helpers.c | 416 +++++++++++
> drivers/media/platform/amphion/vpu_helpers.h | 70 ++
> drivers/media/platform/amphion/vpu_v4l2.c | 733 +++++++++++++++++++
> drivers/media/platform/amphion/vpu_v4l2.h | 56 ++
> 5 files changed, 1461 insertions(+)
> create mode 100644 drivers/media/platform/amphion/vpu_color.c
> create mode 100644 drivers/media/platform/amphion/vpu_helpers.c
> create mode 100644 drivers/media/platform/amphion/vpu_helpers.h
> create mode 100644 drivers/media/platform/amphion/vpu_v4l2.c
> create mode 100644 drivers/media/platform/amphion/vpu_v4l2.h
>
> diff --git a/drivers/media/platform/amphion/vpu_color.c b/drivers/media/platform/amphion/vpu_color.c
> new file mode 100644
> index 000000000000..1c062dc40306
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_color.c
> @@ -0,0 +1,186 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#include <linux/init.h>
> +#include <linux/device.h>
> +#include <linux/ioctl.h>
> +#include <linux/list.h>
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/delay.h>
> +#include <linux/types.h>
> +#include <media/v4l2-device.h>
> +#include "vpu.h"
> +#include "vpu_helpers.h"
> +
> +static const u8 colorprimaries[] = {
> + 0,
> + V4L2_COLORSPACE_REC709, /*Rec. ITU-R BT.709-6*/
> + 0,
> + 0,
> + V4L2_COLORSPACE_470_SYSTEM_M, /*Rec. ITU-R BT.470-6 System M*/
> + V4L2_COLORSPACE_470_SYSTEM_BG, /*Rec. ITU-R BT.470-6 System B, G*/
> + V4L2_COLORSPACE_SMPTE170M, /*SMPTE170M*/
> + V4L2_COLORSPACE_SMPTE240M, /*SMPTE240M*/
> + 0, /*Generic film*/
> + V4L2_COLORSPACE_BT2020, /*Rec. ITU-R BT.2020-2*/
> + 0, /*SMPTE ST 428-1*/
> +};
> +
> +static const u8 colortransfers[] = {
> + 0,
> + V4L2_XFER_FUNC_709, /*Rec. ITU-R BT.709-6*/
> + 0,
> + 0,
> + 0, /*Rec. ITU-R BT.470-6 System M*/
> + 0, /*Rec. ITU-R BT.470-6 System B, G*/
> + V4L2_XFER_FUNC_709, /*SMPTE170M*/
> + V4L2_XFER_FUNC_SMPTE240M, /*SMPTE240M*/
> + V4L2_XFER_FUNC_NONE, /*Linear transfer characteristics*/
> + 0,
> + 0,
> + 0, /*IEC 61966-2-4*/
> + 0, /*Rec. ITU-R BT.1361-0 extended colour gamut*/
> + V4L2_XFER_FUNC_SRGB, /*IEC 61966-2-1 sRGB or sYCC*/
> + V4L2_XFER_FUNC_709, /*Rec. ITU-R BT.2020-2 (10 bit system)*/
> + V4L2_XFER_FUNC_709, /*Rec. ITU-R BT.2020-2 (12 bit system)*/
> + V4L2_XFER_FUNC_SMPTE2084, /*SMPTE ST 2084*/
> + 0, /*SMPTE ST 428-1*/
> + 0 /*Rec. ITU-R BT.2100-0 hybrid log-gamma (HLG)*/
> +};
> +
> +static const u8 colormatrixcoefs[] = {
> + 0,
> + V4L2_YCBCR_ENC_709, /*Rec. ITU-R BT.709-6*/
> + 0,
> + 0,
> + 0, /*Title 47 Code of Federal Regulations*/
> + V4L2_YCBCR_ENC_601, /*Rec. ITU-R BT.601-7 625*/
> + V4L2_YCBCR_ENC_601, /*Rec. ITU-R BT.601-7 525*/
> + V4L2_YCBCR_ENC_SMPTE240M, /*SMPTE240M*/
> + 0,
> + V4L2_YCBCR_ENC_BT2020, /*Rec. ITU-R BT.2020-2*/
> + V4L2_YCBCR_ENC_BT2020_CONST_LUM /*Rec. ITU-R BT.2020-2 constant*/
> +};
> +
> +u32 vpu_color_cvrt_primaries_v2i(u32 primaries)
> +{
> + return VPU_ARRAY_FIND(colorprimaries, primaries);
> +}
> +
> +u32 vpu_color_cvrt_primaries_i2v(u32 primaries)
> +{
> + return VPU_ARRAY_AT(colorprimaries, primaries);
> +}
> +
> +u32 vpu_color_cvrt_transfers_v2i(u32 transfers)
> +{
> + return VPU_ARRAY_FIND(colortransfers, transfers);
> +}
> +
> +u32 vpu_color_cvrt_transfers_i2v(u32 transfers)
> +{
> + return VPU_ARRAY_AT(colortransfers, transfers);
> +}
> +
> +u32 vpu_color_cvrt_matrix_v2i(u32 matrix)
> +{
> + return VPU_ARRAY_FIND(colormatrixcoefs, matrix);
> +}
> +
> +u32 vpu_color_cvrt_matrix_i2v(u32 matrix)
> +{
> + return VPU_ARRAY_AT(colormatrixcoefs, matrix);
> +}
> +
> +u32 vpu_color_cvrt_full_range_v2i(u32 full_range)
> +{
> + return (full_range == V4L2_QUANTIZATION_FULL_RANGE);
> +}
> +
> +u32 vpu_color_cvrt_full_range_i2v(u32 full_range)
> +{
> + if (full_range)
> + return V4L2_QUANTIZATION_FULL_RANGE;
> +
> + return V4L2_QUANTIZATION_LIM_RANGE;
> +}
> +
> +int vpu_color_check_primaries(u32 primaries)
> +{
> + return vpu_color_cvrt_primaries_v2i(primaries) ? 0 : -EINVAL;
> +}
> +
> +int vpu_color_check_transfers(u32 transfers)
> +{
> + return vpu_color_cvrt_transfers_v2i(transfers) ? 0 : -EINVAL;
> +}
> +
> +int vpu_color_check_matrix(u32 matrix)
> +{
> + return vpu_color_cvrt_matrix_v2i(matrix) ? 0 : -EINVAL;
> +}
> +
> +int vpu_color_check_full_range(u32 full_range)
> +{
> + int ret = -EINVAL;
> +
> + switch (full_range) {
> + case V4L2_QUANTIZATION_FULL_RANGE:
> + case V4L2_QUANTIZATION_LIM_RANGE:
> + ret = 0;
> + break;
> + default:
> + break;
> +
> + }
> +
> + return ret;
> +}
> +
> +int vpu_color_get_default(u32 primaries,
> + u32 *ptransfers, u32 *pmatrix, u32 *pfull_range)
> +{
> + u32 transfers;
> + u32 matrix;
> + u32 full_range;
> +
> + switch (primaries) {
> + case V4L2_COLORSPACE_REC709:
> + transfers = V4L2_XFER_FUNC_709;
> + matrix = V4L2_YCBCR_ENC_709;
> + break;
> + case V4L2_COLORSPACE_470_SYSTEM_M:
> + case V4L2_COLORSPACE_470_SYSTEM_BG:
> + case V4L2_COLORSPACE_SMPTE170M:
> + transfers = V4L2_XFER_FUNC_709;
> + matrix = V4L2_YCBCR_ENC_601;
> + break;
> + case V4L2_COLORSPACE_SMPTE240M:
> + transfers = V4L2_XFER_FUNC_SMPTE240M;
> + matrix = V4L2_YCBCR_ENC_SMPTE240M;
> + break;
> + case V4L2_COLORSPACE_BT2020:
> + transfers = V4L2_XFER_FUNC_709;
> + matrix = V4L2_YCBCR_ENC_BT2020;
> + break;
> + default:
> + transfers = V4L2_XFER_FUNC_DEFAULT;
> + matrix = V4L2_YCBCR_ENC_DEFAULT;
> + break;
> + }
> + full_range = V4L2_QUANTIZATION_LIM_RANGE;
> +
> + if (ptransfers)
> + *ptransfers = transfers;
> + if (pmatrix)
> + *pmatrix = matrix;
> + if (pfull_range)
> + *pfull_range = full_range;
> +
> +
> + return 0;
> +}
> diff --git a/drivers/media/platform/amphion/vpu_helpers.c b/drivers/media/platform/amphion/vpu_helpers.c
> new file mode 100644
> index 000000000000..f41df259eb1e
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_helpers.c
> @@ -0,0 +1,416 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#include <linux/init.h>
> +#include <linux/interconnect.h>
> +#include <linux/ioctl.h>
> +#include <linux/list.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include "vpu.h"
> +#include "vpu_core.h"
> +#include "vpu_rpc.h"
> +#include "vpu_helpers.h"
> +
> +int vpu_helper_find_in_array_u8(const u8 *array, u32 size, u32 x)
> +{
> + int i;
> +
> + for (i = 0; i < size; i++) {
> + if (array[i] == x)
> + return i;
> + }
> +
> + return 0;
> +}
> +
> +bool vpu_helper_check_type(struct vpu_inst *inst, u32 type)
> +{
> + const struct vpu_format *pfmt;
> +
> + for (pfmt = inst->formats; pfmt->pixfmt; pfmt++) {
> + if (!vpu_iface_check_format(inst, pfmt->pixfmt))
> + continue;
> + if (pfmt->type == type)
> + return true;
> + }
> +
> + return false;
> +}
> +
> +const struct vpu_format *vpu_helper_find_format(struct vpu_inst *inst, u32 type, u32 pixelfmt)
> +{
> + const struct vpu_format *pfmt;
> +
> + if (!inst || !inst->formats)
> + return NULL;
> +
> + if (!vpu_iface_check_format(inst, pixelfmt))
> + return NULL;
> +
> + for (pfmt = inst->formats; pfmt->pixfmt; pfmt++) {
> + if (pfmt->pixfmt == pixelfmt && (!type || type == pfmt->type))
> + return pfmt;
> + }
> +
> + return NULL;
> +}
> +
> +const struct vpu_format *vpu_helper_enum_format(struct vpu_inst *inst, u32 type, int index)
> +{
> + const struct vpu_format *pfmt;
> + int i = 0;
> +
> + if (!inst || !inst->formats)
> + return NULL;
> +
> + for (pfmt = inst->formats; pfmt->pixfmt; pfmt++) {
> + if (!vpu_iface_check_format(inst, pfmt->pixfmt))
> + continue;
> +
> + if (pfmt->type == type) {
> + if (index == i)
> + return pfmt;
> + i++;
> + }
> + }
> +
> + return NULL;
> +}
> +
> +u32 vpu_helper_valid_frame_width(struct vpu_inst *inst, u32 width)
> +{
> + const struct vpu_core_resources *res;
> +
> + if (!inst)
> + return width;
> +
> + res = vpu_get_resource(inst);
> + if (!res)
> + return width;
> + if (res->max_width)
> + width = clamp(width, res->min_width, res->max_width);
> + if (res->step_width)
> + width = ALIGN(width, res->step_width);
> +
> + return width;
> +}
> +
> +u32 vpu_helper_valid_frame_height(struct vpu_inst *inst, u32 height)
> +{
> + const struct vpu_core_resources *res;
> +
> + if (!inst)
> + return height;
> +
> + res = vpu_get_resource(inst);
> + if (!res)
> + return height;
> + if (res->max_height)
> + height = clamp(height, res->min_height, res->max_height);
> + if (res->step_height)
> + height = ALIGN(height, res->step_height);
> +
> + return height;
> +}
> +
> +static u32 get_nv12_plane_size(u32 width, u32 height, int plane_no,
> + u32 stride, u32 interlaced, u32 *pbl)
> +{
> + u32 bytesperline;
> + u32 size = 0;
> +
> + bytesperline = ALIGN(width, stride);
> + if (pbl)
> + bytesperline = max(bytesperline, *pbl);
> + height = ALIGN(height, 2);
> + if (plane_no == 0)
> + size = bytesperline * height;
> + else if (plane_no == 1)
> + size = bytesperline * height >> 1;
> + if (pbl)
> + *pbl = bytesperline;
> +
> + return size;
> +}
> +
> +static u32 get_tiled_8l128_plane_size(u32 fmt, u32 width, u32 height, int plane_no,
> + u32 stride, u32 interlaced, u32 *pbl)
> +{
> + u32 ws = 3;
> + u32 hs = 7;
> + u32 bitdepth = 8;
> + u32 bytesperline;
> + u32 size = 0;
> +
> + if (interlaced)
> + hs++;
> + if (fmt == V4L2_PIX_FMT_NV12M_10BE_8L128)
> + bitdepth = 10;
> + bytesperline = DIV_ROUND_UP(width * bitdepth, BITS_PER_BYTE);
> + bytesperline = ALIGN(bytesperline, 1 << ws);
> + bytesperline = ALIGN(bytesperline, stride);
> + if (pbl)
> + bytesperline = max(bytesperline, *pbl);
> + height = ALIGN(height, 1 << hs);
> + if (plane_no == 0)
> + size = bytesperline * height;
> + else if (plane_no == 1)
> + size = (bytesperline * ALIGN(height, 1 << (hs + 1))) >> 1;
> + if (pbl)
> + *pbl = bytesperline;
> +
> + return size;
> +}
> +
> +static u32 get_default_plane_size(u32 width, u32 height, int plane_no,
> + u32 stride, u32 interlaced, u32 *pbl)
> +{
> + u32 bytesperline;
> + u32 size = 0;
> +
> + bytesperline = ALIGN(width, stride);
> + if (pbl)
> + bytesperline = max(bytesperline, *pbl);
> + if (plane_no == 0)
> + size = bytesperline * height;
> + if (pbl)
> + *pbl = bytesperline;
> +
> + return size;
> +}
> +
> +u32 vpu_helper_get_plane_size(u32 fmt, u32 w, u32 h, int plane_no,
> + u32 stride, u32 interlaced, u32 *pbl)
> +{
> + switch (fmt) {
> + case V4L2_PIX_FMT_NV12M:
> + return get_nv12_plane_size(w, h, plane_no, stride, interlaced, pbl);
> + case V4L2_PIX_FMT_NV12M_8L128:
> + case V4L2_PIX_FMT_NV12M_10BE_8L128:
> + return get_tiled_8l128_plane_size(fmt, w, h, plane_no, stride, interlaced, pbl);
> + default:
> + return get_default_plane_size(w, h, plane_no, stride, interlaced, pbl);
> + }
> +}
> +
> +u32 vpu_helper_copy_from_stream_buffer(struct vpu_buffer *stream_buffer,
> + u32 *rptr, u32 size, void *dst)
> +{
> + u32 offset;
> + u32 start;
> + u32 end;
> + void *virt;
> +
> + if (!stream_buffer || !rptr || !dst)
> + return -EINVAL;
> +
> + if (!size)
> + return 0;
> +
> + offset = *rptr;
> + start = stream_buffer->phys;
> + end = start + stream_buffer->length;
> + virt = stream_buffer->virt;
> +
> + if (offset < start || offset > end)
> + return -EINVAL;
> +
> + if (offset + size <= end) {
> + memcpy(dst, virt + (offset - start), size);
> + } else {
> + memcpy(dst, virt + (offset - start), end - offset);
> + memcpy(dst + end - offset, virt, size + offset - end);
> + }
> +
> + *rptr = vpu_helper_step_walk(stream_buffer, offset, size);
> + return size;
> +}
> +
> +u32 vpu_helper_copy_to_stream_buffer(struct vpu_buffer *stream_buffer,
> + u32 *wptr, u32 size, void *src)
> +{
> + u32 offset;
> + u32 start;
> + u32 end;
> + void *virt;
> +
> + if (!stream_buffer || !wptr || !src)
> + return -EINVAL;
> +
> + if (!size)
> + return 0;
> +
> + offset = *wptr;
> + start = stream_buffer->phys;
> + end = start + stream_buffer->length;
> + virt = stream_buffer->virt;
> + if (offset < start || offset > end)
> + return -EINVAL;
> +
> + if (offset + size <= end) {
> + memcpy(virt + (offset - start), src, size);
> + } else {
> + memcpy(virt + (offset - start), src, end - offset);
> + memcpy(virt, src + end - offset, size + offset - end);
> + }
> +
> + *wptr = vpu_helper_step_walk(stream_buffer, offset, size);
> +
> + return size;
> +}
> +
> +u32 vpu_helper_memset_stream_buffer(struct vpu_buffer *stream_buffer,
> + u32 *wptr, u8 val, u32 size)
> +{
> + u32 offset;
> + u32 start;
> + u32 end;
> + void *virt;
> +
> + if (!stream_buffer || !wptr)
> + return -EINVAL;
> +
> + if (!size)
> + return 0;
> +
> + offset = *wptr;
> + start = stream_buffer->phys;
> + end = start + stream_buffer->length;
> + virt = stream_buffer->virt;
> + if (offset < start || offset > end)
> + return -EINVAL;
> +
> + if (offset + size <= end) {
> + memset(virt + (offset - start), val, size);
> + } else {
> + memset(virt + (offset - start), val, end - offset);
> + memset(virt, val, size + offset - end);
> + }
> +
> + offset += size;
> + if (offset >= end)
> + offset -= stream_buffer->length;
> +
> + *wptr = offset;
> +
> + return size;
> +}
> +
> +u32 vpu_helper_get_free_space(struct vpu_inst *inst)
> +{
> + struct vpu_rpc_buffer_desc desc;
> +
> + if (vpu_iface_get_stream_buffer_desc(inst, &desc))
> + return 0;
> +
> + if (desc.rptr > desc.wptr)
> + return desc.rptr - desc.wptr;
> + else if (desc.rptr < desc.wptr)
> + return (desc.end - desc.start + desc.rptr - desc.wptr);
> + else
> + return desc.end - desc.start;
> +}
> +
> +u32 vpu_helper_get_used_space(struct vpu_inst *inst)
> +{
> + struct vpu_rpc_buffer_desc desc;
> +
> + if (vpu_iface_get_stream_buffer_desc(inst, &desc))
> + return 0;
> +
> + if (desc.wptr > desc.rptr)
> + return desc.wptr - desc.rptr;
> + else if (desc.wptr < desc.rptr)
> + return (desc.end - desc.start + desc.wptr - desc.rptr);
> + else
> + return 0;
> +}
> +
> +int vpu_helper_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct vpu_inst *inst = ctrl_to_inst(ctrl);
> +
> + switch (ctrl->id) {
> + case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
> + ctrl->val = inst->min_buffer_cap;
> + break;
> + case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
> + ctrl->val = inst->min_buffer_out;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +#define READ_BYTE(buffer, pos) \
> + (*(u8 *)((buffer)->virt + ((pos) % buffer->length)))
> +
> +int vpu_helper_find_startcode(struct vpu_buffer *stream_buffer,
> + u32 pixelformat, u32 offset, u32 bytesused)
> +{
> + u32 start_code;
> + int start_code_size;
> + u32 val = 0;
> + int i;
> + int ret = -EINVAL;
> +
> + if (!stream_buffer || !stream_buffer->virt)
> + return -EINVAL;
> +
> + switch (pixelformat) {
> + case V4L2_PIX_FMT_H264:
> + start_code_size = 4;
> + start_code = 0x00000001;
> + break;
> + default:
> + return 0;
> + }
> +
> + for (i = 0; i < bytesused; i++) {
> + val = (val << 8) | READ_BYTE(stream_buffer, offset + i);
> + if (i < start_code_size - 1)
> + continue;
> + if (val == start_code) {
> + ret = i + 1 - start_code_size;
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +int vpu_find_dst_by_src(struct vpu_pair *pairs, u32 cnt, u32 src)
> +{
> + u32 i;
> +
> + if (!pairs || !cnt)
> + return -EINVAL;
> +
> + for (i = 0; i < cnt; i++) {
> + if (pairs[i].src == src)
> + return pairs[i].dst;
> + }
> +
> + return -EINVAL;
> +}
> +
> +int vpu_find_src_by_dst(struct vpu_pair *pairs, u32 cnt, u32 dst)
> +{
> + u32 i;
> +
> + if (!pairs || !cnt)
> + return -EINVAL;
> +
> + for (i = 0; i < cnt; i++) {
> + if (pairs[i].dst == dst)
> + return pairs[i].src;
> + }
> +
> + return -EINVAL;
> +}
> diff --git a/drivers/media/platform/amphion/vpu_helpers.h b/drivers/media/platform/amphion/vpu_helpers.h
> new file mode 100644
> index 000000000000..8cb9b8c77745
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_helpers.h
> @@ -0,0 +1,70 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#ifndef _AMPHION_VPU_HELPERS_H
> +#define _AMPHION_VPU_HELPERS_H
> +
> +struct vpu_pair {
> + u32 src;
> + u32 dst;
> +};
> +
> +#define MAKE_TIMESTAMP(s, ns) (((s32)(s) * NSEC_PER_SEC) + (ns))
> +#define VPU_INVALID_TIMESTAMP MAKE_TIMESTAMP(-1, 0)
> +#define VPU_ARRAY_AT(array, i) (((i) < ARRAY_SIZE(array)) ? array[i] : 0)
> +#define VPU_ARRAY_FIND(array, x) vpu_helper_find_in_array_u8(array, ARRAY_SIZE(array), x)
> +
> +int vpu_helper_find_in_array_u8(const u8 *array, u32 size, u32 x);
> +bool vpu_helper_check_type(struct vpu_inst *inst, u32 type);
> +const struct vpu_format *vpu_helper_find_format(struct vpu_inst *inst, u32 type, u32 pixelfmt);
> +const struct vpu_format *vpu_helper_enum_format(struct vpu_inst *inst, u32 type, int index);
> +u32 vpu_helper_valid_frame_width(struct vpu_inst *inst, u32 width);
> +u32 vpu_helper_valid_frame_height(struct vpu_inst *inst, u32 height);
> +u32 vpu_helper_get_plane_size(u32 fmt, u32 width, u32 height, int plane_no,
> + u32 stride, u32 interlaced, u32 *pbl);
> +u32 vpu_helper_copy_from_stream_buffer(struct vpu_buffer *stream_buffer,
> + u32 *rptr, u32 size, void *dst);
> +u32 vpu_helper_copy_to_stream_buffer(struct vpu_buffer *stream_buffer,
> + u32 *wptr, u32 size, void *src);
> +u32 vpu_helper_memset_stream_buffer(struct vpu_buffer *stream_buffer,
> + u32 *wptr, u8 val, u32 size);
> +u32 vpu_helper_get_free_space(struct vpu_inst *inst);
> +u32 vpu_helper_get_used_space(struct vpu_inst *inst);
> +int vpu_helper_g_volatile_ctrl(struct v4l2_ctrl *ctrl);
> +void vpu_helper_get_kmp_next(const u8 *pattern, int *next, int size);
> +int vpu_helper_kmp_search(u8 *s, int s_len, const u8 *p, int p_len, int *next);
> +int vpu_helper_kmp_search_in_stream_buffer(struct vpu_buffer *stream_buffer,
> + u32 offset, int bytesused,
> + const u8 *p, int p_len, int *next);
> +int vpu_helper_find_startcode(struct vpu_buffer *stream_buffer,
> + u32 pixelformat, u32 offset, u32 bytesused);
> +
> +static inline u32 vpu_helper_step_walk(struct vpu_buffer *stream_buffer, u32 pos, u32 step)
> +{
> + pos += step;
> + if (pos > stream_buffer->phys + stream_buffer->length)
> + pos -= stream_buffer->length;
> +
> + return pos;
> +}
> +
> +int vpu_color_check_primaries(u32 primaries);
> +int vpu_color_check_transfers(u32 transfers);
> +int vpu_color_check_matrix(u32 matrix);
> +int vpu_color_check_full_range(u32 full_range);
> +u32 vpu_color_cvrt_primaries_v2i(u32 primaries);
> +u32 vpu_color_cvrt_primaries_i2v(u32 primaries);
> +u32 vpu_color_cvrt_transfers_v2i(u32 transfers);
> +u32 vpu_color_cvrt_transfers_i2v(u32 transfers);
> +u32 vpu_color_cvrt_matrix_v2i(u32 matrix);
> +u32 vpu_color_cvrt_matrix_i2v(u32 matrix);
> +u32 vpu_color_cvrt_full_range_v2i(u32 full_range);
> +u32 vpu_color_cvrt_full_range_i2v(u32 full_range);
> +int vpu_color_get_default(u32 primaries,
> + u32 *ptransfers, u32 *pmatrix, u32 *pfull_range);
> +
> +int vpu_find_dst_by_src(struct vpu_pair *pairs, u32 cnt, u32 src);
> +int vpu_find_src_by_dst(struct vpu_pair *pairs, u32 cnt, u32 dst);
> +#endif
> diff --git a/drivers/media/platform/amphion/vpu_v4l2.c b/drivers/media/platform/amphion/vpu_v4l2.c
> new file mode 100644
> index 000000000000..a91690f691bc
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_v4l2.c
> @@ -0,0 +1,733 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#include <linux/init.h>
> +#include <linux/interconnect.h>
> +#include <linux/ioctl.h>
> +#include <linux/list.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/videodev2.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-mem2mem.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/videobuf2-v4l2.h>
> +#include <media/videobuf2-dma-contig.h>
> +#include <media/videobuf2-vmalloc.h>
> +#include "vpu.h"
> +#include "vpu_core.h"
> +#include "vpu_v4l2.h"
> +#include "vpu_msgs.h"
> +#include "vpu_helpers.h"
> +
> +void vpu_inst_lock(struct vpu_inst *inst)
> +{
> + mutex_lock(&inst->lock);
> +}
> +
> +void vpu_inst_unlock(struct vpu_inst *inst)
> +{
> + mutex_unlock(&inst->lock);
> +}
> +
> +dma_addr_t vpu_get_vb_phy_addr(struct vb2_buffer *vb, u32 plane_no)
> +{
> + if (plane_no >= vb->num_planes)
> + return 0;
> + return vb2_dma_contig_plane_dma_addr(vb, plane_no) +
> + vb->planes[plane_no].data_offset;
> +}
> +
> +unsigned int vpu_get_vb_length(struct vb2_buffer *vb, u32 plane_no)
> +{
> + if (plane_no >= vb->num_planes)
> + return 0;
> + return vb2_plane_size(vb, plane_no) - vb->planes[plane_no].data_offset;
> +}
> +
> +void vpu_set_buffer_state(struct vb2_v4l2_buffer *vbuf, unsigned int state)
> +{
> + struct vpu_vb2_buffer *vpu_buf = to_vpu_vb2_buffer(vbuf);
> +
> + vpu_buf->state = state;
> +}
> +
> +unsigned int vpu_get_buffer_state(struct vb2_v4l2_buffer *vbuf)
> +{
> + struct vpu_vb2_buffer *vpu_buf = to_vpu_vb2_buffer(vbuf);
> +
> + return vpu_buf->state;
> +}
> +
> +void vpu_v4l2_set_error(struct vpu_inst *inst)
> +{
> + struct vb2_queue *src_q;
> + struct vb2_queue *dst_q;
> +
> + if (!inst)
> + return;
> +
> + vpu_inst_lock(inst);
> + dev_err(inst->dev, "some error occurs in codec\n");
> + if (inst->fh.m2m_ctx) {
> + src_q = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx);
> + dst_q = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
> + if (src_q)
> + src_q->error = 1;
> + if (dst_q)
> + dst_q->error = 1;
> + }
> + vpu_inst_unlock(inst);
> +}
> +
> +int vpu_notify_eos(struct vpu_inst *inst)
> +{
> + static const struct v4l2_event ev = {
> + .id = 0,
> + .type = V4L2_EVENT_EOS
> + };
> +
> + vpu_trace(inst->dev, "[%d]\n", inst->id);
> + v4l2_event_queue_fh(&inst->fh, &ev);
> +
> + return 0;
> +}
> +
> +int vpu_notify_source_change(struct vpu_inst *inst)
> +{
> + static const struct v4l2_event ev = {
> + .id = 0,
> + .type = V4L2_EVENT_SOURCE_CHANGE,
> + .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION
> + };
> +
> + vpu_trace(inst->dev, "[%d]\n", inst->id);
> + v4l2_event_queue_fh(&inst->fh, &ev);
> + return 0;
> +}
> +
> +int vpu_set_last_buffer_dequeued(struct vpu_inst *inst)
> +{
> + struct vb2_queue *q;
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return -EINVAL;
> +
> + q = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
> + if (!list_empty(&q->done_list))
> + return -EINVAL;
> +
> + if (q->last_buffer_dequeued)
> + return 0;
> + vpu_trace(inst->dev, "last buffer dequeued\n");
> + q->last_buffer_dequeued = true;
> + wake_up(&q->done_wq);
> + vpu_notify_eos(inst);
> + return 0;
> +}
> +
> +const struct vpu_format *vpu_try_fmt_common(struct vpu_inst *inst,
> + struct v4l2_format *f)
> +{
> + struct v4l2_pix_format_mplane *pixmp = &f->fmt.pix_mp;
> + u32 type = f->type;
> + u32 stride = 1;
> + u32 bytesperline;
> + u32 sizeimage;
> + const struct vpu_format *fmt;
> + const struct vpu_core_resources *res;
> + int i;
> +
> + fmt = vpu_helper_find_format(inst, type, pixmp->pixelformat);
> + if (!fmt) {
> + fmt = vpu_helper_enum_format(inst, type, 0);
> + if (!fmt)
> + return NULL;
> + pixmp->pixelformat = fmt->pixfmt;
> + }
> +
> + res = vpu_get_resource(inst);
> + if (res)
> + stride = res->stride;
> + if (pixmp->width)
> + pixmp->width = vpu_helper_valid_frame_width(inst, pixmp->width);
> + if (pixmp->height)
> + pixmp->height = vpu_helper_valid_frame_height(inst, pixmp->height);
> + pixmp->flags = fmt->flags;
> + pixmp->num_planes = fmt->num_planes;
> + if (pixmp->field == V4L2_FIELD_ANY)
> + pixmp->field = V4L2_FIELD_NONE;
> + for (i = 0; i < pixmp->num_planes; i++) {
> + bytesperline = max_t(s32, pixmp->plane_fmt[i].bytesperline, 0);
> + sizeimage = vpu_helper_get_plane_size(pixmp->pixelformat,
> + pixmp->width, pixmp->height, i, stride,
> + pixmp->field > V4L2_FIELD_NONE ? 1 : 0,
> + &bytesperline);
> + sizeimage = max_t(s32, pixmp->plane_fmt[i].sizeimage, sizeimage);
> + pixmp->plane_fmt[i].bytesperline = bytesperline;
> + pixmp->plane_fmt[i].sizeimage = sizeimage;
> + }
> +
> + return fmt;
> +}
> +
> +static bool vpu_check_ready(struct vpu_inst *inst, u32 type)
> +{
> + if (!inst)
> + return false;
> + if (inst->state == VPU_CODEC_STATE_DEINIT || inst->id < 0)
> + return false;
> + if (!inst->ops->check_ready)
> + return true;
> + return call_vop(inst, check_ready, type);
> +}
> +
> +int vpu_process_output_buffer(struct vpu_inst *inst)
> +{
> + struct v4l2_m2m_buffer *buf = NULL;
> + struct vb2_v4l2_buffer *vbuf = NULL;
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return -EINVAL;
> +
> + if (!vpu_check_ready(inst, inst->out_format.type))
> + return -EINVAL;
> +
> + v4l2_m2m_for_each_src_buf(inst->fh.m2m_ctx, buf) {
> + vbuf = &buf->vb;
> + if (vpu_get_buffer_state(vbuf) == VPU_BUF_STATE_IDLE)
> + break;
> + vbuf = NULL;
> + }
> +
> + if (!vbuf)
> + return -EINVAL;
> +
> + dev_dbg(inst->dev, "[%d]frame id = %d / %d\n",
> + inst->id, vbuf->sequence, inst->sequence);
> + return call_vop(inst, process_output, &vbuf->vb2_buf);
> +}
> +
> +int vpu_process_capture_buffer(struct vpu_inst *inst)
> +{
> + struct v4l2_m2m_buffer *buf = NULL;
> + struct vb2_v4l2_buffer *vbuf = NULL;
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return -EINVAL;
> +
> + if (!vpu_check_ready(inst, inst->cap_format.type))
> + return -EINVAL;
> +
> + v4l2_m2m_for_each_dst_buf(inst->fh.m2m_ctx, buf) {
> + vbuf = &buf->vb;
> + if (vpu_get_buffer_state(vbuf) == VPU_BUF_STATE_IDLE)
> + break;
> + vbuf = NULL;
> + }
> + if (!vbuf)
> + return -EINVAL;
> +
> + return call_vop(inst, process_capture, &vbuf->vb2_buf);
> +}
> +
> +struct vb2_v4l2_buffer *vpu_find_buf_by_sequence(struct vpu_inst *inst,
> + u32 type, u32 sequence)
> +{
> + struct v4l2_m2m_buffer *buf = NULL;
> + struct vb2_v4l2_buffer *vbuf = NULL;
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return NULL;
> +
> + if (V4L2_TYPE_IS_OUTPUT(type)) {
> + v4l2_m2m_for_each_src_buf(inst->fh.m2m_ctx, buf) {
> + vbuf = &buf->vb;
> + if (vbuf->sequence == sequence)
> + break;
> + vbuf = NULL;
> + }
> + } else {
> + v4l2_m2m_for_each_dst_buf(inst->fh.m2m_ctx, buf) {
> + vbuf = &buf->vb;
> + if (vbuf->sequence == sequence)
> + break;
> + vbuf = NULL;
> + }
> + }
> +
> + return vbuf;
> +}
> +
> +struct vb2_v4l2_buffer *vpu_find_buf_by_idx(struct vpu_inst *inst,
> + u32 type, u32 idx)
> +{
> + struct v4l2_m2m_buffer *buf = NULL;
> + struct vb2_v4l2_buffer *vbuf = NULL;
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return NULL;
> +
> + if (V4L2_TYPE_IS_OUTPUT(type)) {
> + v4l2_m2m_for_each_src_buf(inst->fh.m2m_ctx, buf) {
> + vbuf = &buf->vb;
> + if (vbuf->vb2_buf.index == idx)
> + break;
> + vbuf = NULL;
> + }
> + } else {
> + v4l2_m2m_for_each_dst_buf(inst->fh.m2m_ctx, buf) {
> + vbuf = &buf->vb;
> + if (vbuf->vb2_buf.index == idx)
> + break;
> + vbuf = NULL;
> + }
> + }
> +
> + return vbuf;
> +}
> +
> +int vpu_get_num_buffers(struct vpu_inst *inst, u32 type)
> +{
> + struct vb2_queue *q;
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return -EINVAL;
> +
> + if (V4L2_TYPE_IS_OUTPUT(type))
> + q = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx);
> + else
> + q = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
> +
> + return q->num_buffers;
> +}
> +
> +static void vpu_m2m_device_run(void *priv)
> +{
> +}
> +
> +static void vpu_m2m_job_abort(void *priv)
> +{
> + struct vpu_inst *inst = priv;
> + struct v4l2_m2m_ctx *m2m_ctx = inst->fh.m2m_ctx;
> +
> + v4l2_m2m_job_finish(m2m_ctx->m2m_dev, m2m_ctx);
> +}
> +
> +static const struct v4l2_m2m_ops vpu_m2m_ops = {
> + .device_run = vpu_m2m_device_run,
> + .job_abort = vpu_m2m_job_abort
> +};
> +
> +static int vpu_vb2_queue_setup(struct vb2_queue *vq,
> + unsigned int *buf_count,
> + unsigned int *plane_count,
> + unsigned int psize[],
> + struct device *allocators[])
> +{
> + struct vpu_inst *inst = vb2_get_drv_priv(vq);
> + struct vpu_format *cur_fmt;
> + int i;
> +
> + cur_fmt = vpu_get_format(inst, vq->type);
> +
> + if (*plane_count) {
> + if (inst->state == VPU_CODEC_STATE_DYAMIC_RESOLUTION_CHANGE) {
Huh? This 'if' is really weird. Why do you need this?
> + for (i = 0; i < *plane_count; i++) {
> + if (!psize[i])
This should never happen when you use VIDIOC_CREATE_BUFS to add more buffers.
> + psize[i] = cur_fmt->sizeimage[i];
> + }
> + return 0;
At minimum this needs comments, but it all looks very suspicious.
> + }
> + if (*plane_count != cur_fmt->num_planes)
> + return -EINVAL;
> + for (i = 0; i < cur_fmt->num_planes; i++) {
> + if (psize[i] < cur_fmt->sizeimage[i])
> + return -EINVAL;
> + }
> + return 0;
> + }
> +
> + *plane_count = cur_fmt->num_planes;
> + for (i = 0; i < cur_fmt->num_planes; i++)
> + psize[i] = cur_fmt->sizeimage[i];
> +
> + return 0;
> +}
> +
> +static int vpu_vb2_buf_init(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +
> + vpu_set_buffer_state(vbuf, VPU_BUF_STATE_IDLE);
> + return 0;
> +}
> +
> +static int vpu_vb2_buf_out_validate(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +
> + vbuf->field = V4L2_FIELD_NONE;
> +
> + return 0;
> +}
> +
> +static int vpu_vb2_buf_prepare(struct vb2_buffer *vb)
> +{
> + struct vpu_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct vpu_format *cur_fmt;
> + u32 i;
> +
> + cur_fmt = vpu_get_format(inst, vb->type);
> + if (vb->num_planes != cur_fmt->num_planes)
> + return -EINVAL;
This can't happen, so you can drop this.
> + for (i = 0; i < cur_fmt->num_planes; i++) {
> + if (vpu_get_vb_length(vb, i) < cur_fmt->sizeimage[i]) {
> + dev_dbg(inst->dev, "[%d] %s buf[%d] is invalid\n",
> + inst->id,
> + vpu_type_name(vb->type),
> + vb->index);
> + vpu_set_buffer_state(vbuf, VPU_BUF_STATE_ERROR);
> + }
> + }
> +
> + return 0;
> +}
> +
> +static void vpu_vb2_buf_finish(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct vpu_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
> + struct vb2_queue *q = vb->vb2_queue;
> +
> + if (vbuf->flags & V4L2_BUF_FLAG_LAST)
> + vpu_notify_eos(inst);
> +
> + if (list_empty(&q->done_list))
> + call_vop(inst, on_queue_empty, q->type);
> +}
> +
> +void vpu_vb2_buffers_return(struct vpu_inst *inst,
> + unsigned int type, enum vb2_buffer_state state)
> +{
> + struct vb2_v4l2_buffer *buf;
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return;
> +
> + if (V4L2_TYPE_IS_OUTPUT(type)) {
> + while ((buf = v4l2_m2m_src_buf_remove(inst->fh.m2m_ctx)))
> + v4l2_m2m_buf_done(buf, state);
> + } else {
> + while ((buf = v4l2_m2m_dst_buf_remove(inst->fh.m2m_ctx)))
> + v4l2_m2m_buf_done(buf, state);
> + }
> +}
> +
> +static int vpu_vb2_start_streaming(struct vb2_queue *q, unsigned int count)
> +{
> + struct vpu_inst *inst = vb2_get_drv_priv(q);
> + struct vpu_format *fmt = vpu_get_format(inst, q->type);
> + int ret;
> +
> + vpu_inst_unlock(inst);
> + ret = vpu_inst_register(inst);
> + vpu_inst_lock(inst);
> + if (ret) {
> + vpu_vb2_buffers_return(inst, q->type, VB2_BUF_STATE_QUEUED);
> + return ret;
> + }
> +
> + vpu_trace(inst->dev, "[%d] %s %c%c%c%c %dx%d %u(%u) %u(%u) %u(%u) %d\n",
> + inst->id, vpu_type_name(q->type),
> + fmt->pixfmt,
> + fmt->pixfmt >> 8,
> + fmt->pixfmt >> 16,
> + fmt->pixfmt >> 24,
> + fmt->width, fmt->height,
> + fmt->sizeimage[0], fmt->bytesperline[0],
> + fmt->sizeimage[1], fmt->bytesperline[1],
> + fmt->sizeimage[2], fmt->bytesperline[2],
> + q->num_buffers);
> + call_vop(inst, start, q->type);
> + vb2_clear_last_buffer_dequeued(q);
> +
> + return 0;
> +}
> +
> +static void vpu_vb2_stop_streaming(struct vb2_queue *q)
> +{
> + struct vpu_inst *inst = vb2_get_drv_priv(q);
> +
> + vpu_trace(inst->dev, "[%d] %s\n", inst->id, vpu_type_name(q->type));
> +
> + call_vop(inst, stop, q->type);
> + vpu_vb2_buffers_return(inst, q->type, VB2_BUF_STATE_ERROR);
> + if (V4L2_TYPE_IS_OUTPUT(q->type))
> + inst->sequence = 0;
> +}
> +
> +static void vpu_vb2_buf_queue(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct vpu_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
> +
> + if (!inst || !inst->fh.m2m_ctx)
> + return;
> + if (V4L2_TYPE_IS_OUTPUT(vb->type)) {
> + vbuf->sequence = inst->sequence++;
> + if ((s64)vb->timestamp < 0)
> + vb->timestamp = VPU_INVALID_TIMESTAMP;
> + }
> +
> + v4l2_m2m_buf_queue(inst->fh.m2m_ctx, vbuf);
> + vpu_process_output_buffer(inst);
> + vpu_process_capture_buffer(inst);
> +}
> +
> +static struct vb2_ops vpu_vb2_ops = {
> + .queue_setup = vpu_vb2_queue_setup,
> + .buf_init = vpu_vb2_buf_init,
> + .buf_out_validate = vpu_vb2_buf_out_validate,
> + .buf_prepare = vpu_vb2_buf_prepare,
> + .buf_finish = vpu_vb2_buf_finish,
> + .start_streaming = vpu_vb2_start_streaming,
> + .stop_streaming = vpu_vb2_stop_streaming,
> + .buf_queue = vpu_vb2_buf_queue,
> + .wait_prepare = vb2_ops_wait_prepare,
> + .wait_finish = vb2_ops_wait_finish,
> +};
> +
> +static int vpu_m2m_queue_init(void *priv, struct vb2_queue *src_vq,
> + struct vb2_queue *dst_vq)
> +{
> + struct vpu_inst *inst = priv;
> + int ret;
> +
> + inst->out_format.type = src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
> + src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
> + src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> + src_vq->ops = &vpu_vb2_ops;
> + src_vq->mem_ops = &vb2_dma_contig_memops;
> + if (inst->type == VPU_CORE_TYPE_DEC && inst->use_stream_buffer)
> + src_vq->mem_ops = &vb2_vmalloc_memops;
> + src_vq->drv_priv = inst;
> + src_vq->buf_struct_size = sizeof(struct vpu_vb2_buffer);
> + src_vq->min_buffers_needed = 1;
> + src_vq->dev = inst->vpu->dev;
> + src_vq->lock = &inst->lock;
> + ret = vb2_queue_init(src_vq);
> + if (ret)
> + return ret;
> +
> + inst->cap_format.type = dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
> + dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
> + dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> + dst_vq->ops = &vpu_vb2_ops;
> + dst_vq->mem_ops = &vb2_dma_contig_memops;
> + if (inst->type == VPU_CORE_TYPE_ENC && inst->use_stream_buffer)
> + dst_vq->mem_ops = &vb2_vmalloc_memops;
> + dst_vq->drv_priv = inst;
> + dst_vq->buf_struct_size = sizeof(struct vpu_vb2_buffer);
> + dst_vq->min_buffers_needed = 1;
> + dst_vq->dev = inst->vpu->dev;
> + dst_vq->lock = &inst->lock;
> + ret = vb2_queue_init(dst_vq);
> + if (ret) {
> + vb2_queue_release(src_vq);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int vpu_v4l2_release(struct vpu_inst *inst)
> +{
> + vpu_trace(inst->vpu->dev, "%p\n", inst);
> +
> + vpu_release_core(inst->core);
> + put_device(inst->dev);
> +
> + if (inst->workqueue) {
> + cancel_work_sync(&inst->msg_work);
> + destroy_workqueue(inst->workqueue);
> + inst->workqueue = NULL;
> + }
> +
> + v4l2_ctrl_handler_free(&inst->ctrl_handler);
> + mutex_destroy(&inst->lock);
> + v4l2_fh_del(&inst->fh);
> + v4l2_fh_exit(&inst->fh);
> +
> + call_vop(inst, cleanup);
> +
> + return 0;
> +}
> +
> +int vpu_v4l2_open(struct file *file, struct vpu_inst *inst)
> +{
> + struct vpu_dev *vpu = video_drvdata(file);
> + struct vpu_func *func;
> + int ret = 0;
> +
> + if (!file || !inst || !inst->ops)
> + return -EINVAL;
> +
> + if (inst->type == VPU_CORE_TYPE_ENC)
> + func = &vpu->encoder;
> + else
> + func = &vpu->decoder;
> +
> + atomic_set(&inst->ref_count, 0);
> + vpu_inst_get(inst);
> + inst->vpu = vpu;
> + inst->core = vpu_request_core(vpu, inst->type);
> + if (inst->core)
> + inst->dev = get_device(inst->core->dev);
> + mutex_init(&inst->lock);
> + INIT_LIST_HEAD(&inst->cmd_q);
> + inst->id = VPU_INST_NULL_ID;
> + inst->release = vpu_v4l2_release;
> + inst->pid = current->pid;
> + inst->tgid = current->tgid;
> + inst->min_buffer_cap = 2;
> + inst->min_buffer_out = 2;
> + v4l2_fh_init(&inst->fh, func->vfd);
> + v4l2_fh_add(&inst->fh);
> +
> + ret = call_vop(inst, ctrl_init);
> + if (ret)
> + goto error;
> +
> + inst->fh.m2m_ctx = v4l2_m2m_ctx_init(func->m2m_dev,
> + inst, vpu_m2m_queue_init);
> + if (IS_ERR(inst->fh.m2m_ctx)) {
> + dev_err(vpu->dev, "v4l2_m2m_ctx_init fail\n");
> + ret = PTR_ERR(func->m2m_dev);
> + goto error;
> + }
> +
> + inst->fh.ctrl_handler = &inst->ctrl_handler;
> + file->private_data = &inst->fh;
> + inst->state = VPU_CODEC_STATE_DEINIT;
> + inst->workqueue = alloc_workqueue("vpu_inst", WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
> + if (inst->workqueue) {
> + INIT_WORK(&inst->msg_work, vpu_inst_run_work);
> + ret = kfifo_init(&inst->msg_fifo,
> + inst->msg_buffer,
> + roundup_pow_of_two(sizeof(inst->msg_buffer)));
> + if (ret) {
> + destroy_workqueue(inst->workqueue);
> + inst->workqueue = NULL;
> + }
> + }
> + vpu_trace(vpu->dev, "tgid = %d, pid = %d, type = %s, inst = %p\n",
> + inst->tgid, inst->pid, vpu_core_type_desc(inst->type), inst);
> +
> + return 0;
> +error:
> + vpu_inst_put(inst);
> + return ret;
> +}
> +
> +int vpu_v4l2_close(struct file *file)
> +{
> + struct vpu_dev *vpu = video_drvdata(file);
> + struct vpu_inst *inst = to_inst(file);
> +
> + vpu_trace(vpu->dev, "tgid = %d, pid = %d, inst = %p\n",
> + inst->tgid, inst->pid, inst);
> +
> + vpu_inst_lock(inst);
> + if (inst->fh.m2m_ctx) {
> + v4l2_m2m_ctx_release(inst->fh.m2m_ctx);
> + inst->fh.m2m_ctx = NULL;
> + }
> + vpu_inst_unlock(inst);
> +
> + call_vop(inst, release);
> + vpu_inst_unregister(inst);
> + vpu_inst_put(inst);
> +
> + return 0;
> +}
> +
> +int vpu_add_func(struct vpu_dev *vpu, struct vpu_func *func)
> +{
> + struct video_device *vfd;
> + int ret;
> +
> + if (!vpu || !func)
> + return -EINVAL;
> +
> + if (func->vfd)
> + return 0;
> +
> + func->m2m_dev = v4l2_m2m_init(&vpu_m2m_ops);
> + if (IS_ERR(func->m2m_dev)) {
> + dev_err(vpu->dev, "v4l2_m2m_init fail\n");
> + func->vfd = NULL;
> + return PTR_ERR(func->m2m_dev);
> + }
> +
> + vfd = video_device_alloc();
> + if (!vfd) {
> + v4l2_m2m_release(func->m2m_dev);
> + dev_err(vpu->dev, "alloc vpu decoder video device fail\n");
> + return -ENOMEM;
> + }
> + vfd->release = video_device_release;
> + vfd->vfl_dir = VFL_DIR_M2M;
> + vfd->v4l2_dev = &vpu->v4l2_dev;
> + vfd->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
> + if (func->type == VPU_CORE_TYPE_ENC) {
> + strscpy(vfd->name, "amphion-vpu-encoder", sizeof(vfd->name));
> + vfd->fops = venc_get_fops();
> + vfd->ioctl_ops = venc_get_ioctl_ops();
> + } else {
> + strscpy(vfd->name, "amphion-vpu-decoder", sizeof(vfd->name));
> + vfd->fops = vdec_get_fops();
> + vfd->ioctl_ops = vdec_get_ioctl_ops();
> + }
> +
> + ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
> + if (ret) {
> + video_device_release(vfd);
> + v4l2_m2m_release(func->m2m_dev);
> + return ret;
> + }
> + video_set_drvdata(vfd, vpu);
> + func->vfd = vfd;
> +
> + ret = v4l2_m2m_register_media_controller(func->m2m_dev, func->vfd, func->function);
> + if (ret) {
> + v4l2_m2m_release(func->m2m_dev);
> + func->m2m_dev = NULL;
> + video_unregister_device(func->vfd);
> + func->vfd = NULL;
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +void vpu_remove_func(struct vpu_func *func)
> +{
> + if (!func)
> + return;
> +
> + if (func->m2m_dev) {
> + v4l2_m2m_unregister_media_controller(func->m2m_dev);
> + v4l2_m2m_release(func->m2m_dev);
> + func->m2m_dev = NULL;
> + }
> + if (func->vfd) {
> + video_unregister_device(func->vfd);
> + func->vfd = NULL;
> + }
> +}
> diff --git a/drivers/media/platform/amphion/vpu_v4l2.h b/drivers/media/platform/amphion/vpu_v4l2.h
> new file mode 100644
> index 000000000000..17aa36603f82
> --- /dev/null
> +++ b/drivers/media/platform/amphion/vpu_v4l2.h
> @@ -0,0 +1,56 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright 2020-2021 NXP
> + */
> +
> +#ifndef _AMPHION_VPU_V4L2_H
> +#define _AMPHION_VPU_V4L2_H
> +
> +#include <linux/videodev2.h>
> +
> +void vpu_inst_lock(struct vpu_inst *inst);
> +void vpu_inst_unlock(struct vpu_inst *inst);
> +void vpu_set_buffer_state(struct vb2_v4l2_buffer *vbuf, unsigned int state);
> +unsigned int vpu_get_buffer_state(struct vb2_v4l2_buffer *vbuf);
> +
> +int vpu_v4l2_open(struct file *file, struct vpu_inst *inst);
> +int vpu_v4l2_close(struct file *file);
> +
> +const struct vpu_format *vpu_try_fmt_common(struct vpu_inst *inst, struct v4l2_format *f);
> +int vpu_process_output_buffer(struct vpu_inst *inst);
> +int vpu_process_capture_buffer(struct vpu_inst *inst);
> +struct vb2_v4l2_buffer *vpu_find_buf_by_sequence(struct vpu_inst *inst, u32 type, u32 sequence);
> +struct vb2_v4l2_buffer *vpu_find_buf_by_idx(struct vpu_inst *inst, u32 type, u32 idx);
> +void vpu_v4l2_set_error(struct vpu_inst *inst);
> +int vpu_notify_eos(struct vpu_inst *inst);
> +int vpu_notify_source_change(struct vpu_inst *inst);
> +int vpu_set_last_buffer_dequeued(struct vpu_inst *inst);
> +void vpu_vb2_buffers_return(struct vpu_inst *inst,
> + unsigned int type, enum vb2_buffer_state state);
> +int vpu_get_num_buffers(struct vpu_inst *inst, u32 type);
> +
> +dma_addr_t vpu_get_vb_phy_addr(struct vb2_buffer *vb, u32 plane_no);
> +unsigned int vpu_get_vb_length(struct vb2_buffer *vb, u32 plane_no);
> +static inline struct vpu_format *vpu_get_format(struct vpu_inst *inst, u32 type)
> +{
> + if (V4L2_TYPE_IS_OUTPUT(type))
> + return &inst->out_format;
> + else
> + return &inst->cap_format;
> +}
> +
> +static inline char *vpu_type_name(u32 type)
> +{
> + return V4L2_TYPE_IS_OUTPUT(type) ? "output" : "capture";
> +}
> +
> +static inline int vpu_vb_is_codecconfig(struct vb2_v4l2_buffer *vbuf)
> +{
> +#ifdef V4L2_BUF_FLAG_CODECCONFIG
> + return (vbuf->flags & V4L2_BUF_FLAG_CODECCONFIG) ? 1 : 0;
> +#else
> + return 0;
> +#endif
> +}
> +
> +#endif
