From: Hans Verkuil <hans.verk...@cisco.com> Add the virtual codec driver that uses the Fast Walsh Hadamard Transform.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com> --- MAINTAINERS | 8 + drivers/media/platform/Kconfig | 3 + drivers/media/platform/Makefile | 1 + drivers/media/platform/vicodec/Kconfig | 12 + drivers/media/platform/vicodec/Makefile | 4 + drivers/media/platform/vicodec/vicodec-core.c | 1167 +++++++++++++++++ 6 files changed, 1195 insertions(+) create mode 100644 drivers/media/platform/vicodec/Kconfig create mode 100644 drivers/media/platform/vicodec/Makefile create mode 100644 drivers/media/platform/vicodec/vicodec-core.c diff --git a/MAINTAINERS b/MAINTAINERS index bd147aee7f80..c57437e69f9e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15145,6 +15145,14 @@ L: net...@vger.kernel.org S: Maintained F: drivers/net/ethernet/via/via-velocity.* +VICODEC VIRTUAL CODEC DRIVER +M: Hans Verkuil <hans.verk...@cisco.com> +L: linux-media@vger.kernel.org +T: git git://linuxtv.org/media_tree.git +W: https://linuxtv.org +S: Maintained +F: drivers/media/platform/vicodec/* + VIDEO MULTIPLEXER DRIVER M: Philipp Zabel <p.za...@pengutronix.de> L: linux-media@vger.kernel.org diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 210b44a457eb..3e456aaa99d8 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -514,6 +514,9 @@ config VIDEO_VIM2M ---help--- This is a virtual test device for the memory-to-memory driver framework. + +source "drivers/media/platform/vicodec/Kconfig" + endif #V4L_TEST_DRIVERS menuconfig DVB_PLATFORM_DRIVERS diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index 04bc1502a30e..8e5f88eb7559 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_VIDEO_VIU) += fsl-viu.o obj-$(CONFIG_VIDEO_VIMC) += vimc/ obj-$(CONFIG_VIDEO_VIVID) += vivid/ obj-$(CONFIG_VIDEO_VIM2M) += vim2m.o +obj-$(CONFIG_VIDEO_VICODEC) += vicodec/ obj-$(CONFIG_VIDEO_TI_VPE) += ti-vpe/ diff --git a/drivers/media/platform/vicodec/Kconfig b/drivers/media/platform/vicodec/Kconfig new file mode 100644 index 000000000000..767338f48b3f --- /dev/null +++ b/drivers/media/platform/vicodec/Kconfig @@ -0,0 +1,12 @@ +config VIDEO_VICODEC + tristate "Virtual Codec Driver" + depends on VIDEO_DEV && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API + select VIDEOBUF2_VMALLOC + default n + help + Driver for a Virtual Codec + + This driver can be compared to the vim2m driver for emulating + a video device node that exposes an emulated hardware codec. + + When in doubt, say N. diff --git a/drivers/media/platform/vicodec/Makefile b/drivers/media/platform/vicodec/Makefile new file mode 100644 index 000000000000..197229428953 --- /dev/null +++ b/drivers/media/platform/vicodec/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +vicodec-objs := vicodec-core.o vicodec-codec.o + +obj-$(CONFIG_VIDEO_VICODEC) += vicodec.o diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c new file mode 100644 index 000000000000..476f5fbb879d --- /dev/null +++ b/drivers/media/platform/vicodec/vicodec-core.c @@ -0,0 +1,1167 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * A virtual codec example device. + * + * Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved. + * + * This is a virtual codec device driver for testing the codec framework. + * It simulates a device that uses memory buffers for both source and + * destination and encodes or decodes the data. + */ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/fs.h> +#include <linux/sched.h> +#include <linux/slab.h> + +#include <linux/platform_device.h> +#include <media/v4l2-mem2mem.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <media/videobuf2-vmalloc.h> + +#include "vicodec-codec.h" + +MODULE_DESCRIPTION("Virtual codec device"); +MODULE_AUTHOR("Hans Verkuil <hans.verk...@cisco.com>"); +MODULE_LICENSE("GPL v2"); + +static unsigned int debug; +module_param(debug, uint, 0644); +MODULE_PARM_DESC(debug, "activates debug info"); + +#define VICODEC_NAME "vicodec" +#define MAX_WIDTH 4096U +#define MIN_WIDTH 640U +#define MAX_HEIGHT 2160U +#define MIN_HEIGHT 480U + +#define dprintk(dev, fmt, arg...) \ + v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) + + +static void vicodec_dev_release(struct device *dev) +{ +} + +static struct platform_device vicodec_pdev = { + .name = VICODEC_NAME, + .dev.release = vicodec_dev_release, +}; + +/* Per-queue, driver-specific private data */ +struct vicodec_q_data { + unsigned int width; + unsigned int height; + unsigned int sizeimage; + unsigned int sequence; + u32 fourcc; +}; + +enum { + V4L2_M2M_SRC = 0, + V4L2_M2M_DST = 1, +}; + +struct vicodec_dev { + struct v4l2_device v4l2_dev; + struct video_device enc_vfd; + struct video_device dec_vfd; +#ifdef CONFIG_MEDIA_CONTROLLER + struct media_device mdev; +#endif + + struct mutex enc_mutex; + struct mutex dec_mutex; + spinlock_t enc_lock; + spinlock_t dec_lock; + + struct v4l2_m2m_dev *enc_dev; + struct v4l2_m2m_dev *dec_dev; +}; + +struct vicodec_ctx { + struct v4l2_fh fh; + struct vicodec_dev *dev; + bool is_enc; + spinlock_t *lock; + + struct v4l2_ctrl_handler hdl; + struct v4l2_ctrl *ctrl_gop_size; + unsigned int gop_size; + unsigned int gop_cnt; + + /* Abort requested by m2m */ + int aborting; + struct vb2_v4l2_buffer *last_dst_buf; + + enum v4l2_colorspace colorspace; + enum v4l2_ycbcr_encoding ycbcr_enc; + enum v4l2_xfer_func xfer_func; + enum v4l2_quantization quantization; + + /* Source and destination queue data */ + struct vicodec_q_data q_data[2]; + struct raw_frame ref_frame; +}; + +static const u32 pixfmts_yuv[] = { + V4L2_PIX_FMT_YUV420, + V4L2_PIX_FMT_YVU420, + V4L2_PIX_FMT_NV12, + V4L2_PIX_FMT_NV21, +}; + +static inline struct vicodec_ctx *file2ctx(struct file *file) +{ + return container_of(file->private_data, struct vicodec_ctx, fh); +} + +static struct vicodec_q_data *get_q_data(struct vicodec_ctx *ctx, + enum v4l2_buf_type type) +{ + switch (type) { + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + return &ctx->q_data[V4L2_M2M_SRC]; + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + return &ctx->q_data[V4L2_M2M_DST]; + default: + WARN_ON(1); + break; + } + return NULL; +} + +static bool encode(struct vicodec_ctx *ctx, + struct vicodec_q_data *q_data, + u8 *p_in, u8 *p_out) +{ + unsigned int size = q_data->width * q_data->height; + struct cframe_hdr *p_hdr; + struct cframe cf; + struct raw_frame rf; + bool is_pframe; + + rf.width = q_data->width; + rf.height = q_data->height; + rf.luma = p_in; + + switch (q_data->fourcc) { + case V4L2_PIX_FMT_YUV420: + rf.cb = rf.luma + size; + rf.cr = rf.cb + size / 4; + rf.chroma_step = 1; + break; + case V4L2_PIX_FMT_YVU420: + rf.cr = rf.luma + size; + rf.cb = rf.cr + size / 4; + rf.chroma_step = 1; + break; + case V4L2_PIX_FMT_NV12: + rf.cb = rf.luma + size; + rf.cr = rf.cb + 1; + rf.chroma_step = 2; + break; + case V4L2_PIX_FMT_NV21: + rf.cr = rf.luma + size; + rf.cb = rf.cr + 1; + rf.chroma_step = 2; + break; + } + + cf.width = q_data->width; + cf.height = q_data->height; + cf.rlc_data = (s16 *)(p_out + sizeof(*p_hdr)); + + is_pframe = encode_frame(&rf, &ctx->ref_frame, &cf, !ctx->gop_cnt, + ctx->gop_cnt == ctx->gop_size - 1); + if (!is_pframe) + ctx->gop_cnt = 0; + if (++ctx->gop_cnt == ctx->gop_size) + ctx->gop_cnt = 0; + + p_hdr = (struct cframe_hdr *)p_out; + p_hdr->magic1 = VICODEC_MAGIC1; + p_hdr->magic2 = VICODEC_MAGIC2; + p_hdr->version = htonl(VICODEC_VERSION); + p_hdr->width = htonl(cf.width); + p_hdr->height = htonl(cf.height); + p_hdr->colorspace = htonl(ctx->colorspace); + p_hdr->xfer_func = htonl(ctx->xfer_func); + p_hdr->ycbcr_enc = htonl(ctx->ycbcr_enc); + p_hdr->quantization = htonl(ctx->quantization); + p_hdr->size = htonl(cf.size); + ctx->ref_frame.width = cf.width; + ctx->ref_frame.height = cf.height; + return is_pframe; +} + +static int decode(struct vicodec_ctx *ctx, + struct vicodec_q_data *q_data, + u8 *p_in, u8 *p_out) +{ + unsigned int size = q_data->width * q_data->height; + unsigned int i; + struct cframe_hdr *p_hdr; + struct cframe cf; + u8 *p; + + p_hdr = (struct cframe_hdr *)p_in; + cf.width = ntohl(p_hdr->width); + cf.height = ntohl(p_hdr->height); + ctx->colorspace = ntohl(p_hdr->colorspace); + ctx->xfer_func = ntohl(p_hdr->xfer_func); + ctx->ycbcr_enc = ntohl(p_hdr->ycbcr_enc); + ctx->quantization = ntohl(p_hdr->quantization); + cf.rlc_data = (s16 *)(p_in + sizeof(*p_hdr)); + + if (p_hdr->magic1 != VICODEC_MAGIC1 || + p_hdr->magic2 != VICODEC_MAGIC2 || + ntohl(p_hdr->version) != VICODEC_VERSION || + cf.width < VICODEC_MIN_WIDTH || + cf.width > VICODEC_MAX_WIDTH || + cf.height < VICODEC_MIN_HEIGHT || + cf.height > VICODEC_MAX_HEIGHT || + (cf.width & 7) || (cf.height & 7)) + return -1; + + decode_frame(&cf, &ctx->ref_frame); + memcpy(p_out, ctx->ref_frame.luma, size); + p_out += size; + + switch (q_data->fourcc) { + case V4L2_PIX_FMT_YUV420: + memcpy(p_out, ctx->ref_frame.cb, size / 4); + p_out += size / 4; + memcpy(p_out, ctx->ref_frame.cr, size / 4); + break; + case V4L2_PIX_FMT_YVU420: + memcpy(p_out, ctx->ref_frame.cr, size / 4); + p_out += size / 4; + memcpy(p_out, ctx->ref_frame.cb, size / 4); + break; + case V4L2_PIX_FMT_NV12: + for (i = 0, p = p_out; i < size / 4; i++, p += 2) + *p = ctx->ref_frame.cb[i]; + for (i = 0, p = p_out + 1; i < size / 4; i++, p += 2) + *p = ctx->ref_frame.cr[i]; + break; + case V4L2_PIX_FMT_NV21: + for (i = 0, p = p_out; i < size / 4; i++, p += 2) + *p = ctx->ref_frame.cr[i]; + for (i = 0, p = p_out + 1; i < size / 4; i++, p += 2) + *p = ctx->ref_frame.cb[i]; + break; + } + return 0; +} + +static int device_process(struct vicodec_ctx *ctx, + struct vb2_v4l2_buffer *in_vb, + struct vb2_v4l2_buffer *out_vb) +{ + struct vicodec_dev *dev = ctx->dev; + struct vicodec_q_data *q_out, *q_cap; + u8 *p_in, *p_out; + int ret; + + q_out = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); + q_cap = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); + p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0); + p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0); + if (!p_in || !p_out) { + v4l2_err(&dev->v4l2_dev, + "Acquiring kernel pointers to buffers failed\n"); + return -EFAULT; + } + + if (ctx->is_enc) { + struct cframe_hdr *p_hdr = (struct cframe_hdr *)p_out; + + encode(ctx, q_out, p_in, p_out); + vb2_set_plane_payload(&out_vb->vb2_buf, 0, + sizeof(*p_hdr) + ntohl(p_hdr->size)); + } else { + ret = decode(ctx, q_cap, p_in, p_out); + if (ret) + return ret; + vb2_set_plane_payload(&out_vb->vb2_buf, 0, + q_cap->width * q_cap->height * 3 / 2); + } + + out_vb->sequence = q_cap->sequence++; + in_vb->sequence = q_out->sequence++; + out_vb->vb2_buf.timestamp = in_vb->vb2_buf.timestamp; + + if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE) + out_vb->timecode = in_vb->timecode; + out_vb->field = in_vb->field; + out_vb->flags &= ~V4L2_BUF_FLAG_LAST; + out_vb->flags |= in_vb->flags & + (V4L2_BUF_FLAG_TIMECODE | + V4L2_BUF_FLAG_KEYFRAME | + V4L2_BUF_FLAG_PFRAME | + V4L2_BUF_FLAG_BFRAME | + V4L2_BUF_FLAG_TSTAMP_SRC_MASK); + + return 0; +} + +/* + * mem2mem callbacks + */ + +/* device_run() - prepares and starts the device */ +static void device_run(void *priv) +{ + static const struct v4l2_event eos_event = { + .type = V4L2_EVENT_EOS + }; + struct vicodec_ctx *ctx = priv; + struct vicodec_dev *dev = ctx->dev; + struct vb2_v4l2_buffer *src_buf, *dst_buf; + u32 state = VB2_BUF_STATE_DONE; + + src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); + dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); + + if (device_process(ctx, src_buf, dst_buf)) + state = VB2_BUF_STATE_ERROR; + ctx->last_dst_buf = dst_buf; + + spin_lock(ctx->lock); + v4l2_m2m_buf_done(src_buf, state); + if (src_buf->flags & V4L2_BUF_FLAG_LAST) { + dst_buf->flags |= V4L2_BUF_FLAG_LAST; + src_buf->flags &= ~V4L2_BUF_FLAG_LAST; + v4l2_event_queue_fh(&ctx->fh, &eos_event); + } + v4l2_m2m_buf_done(dst_buf, state); + spin_unlock(ctx->lock); + + if (ctx->is_enc) + v4l2_m2m_job_finish(dev->enc_dev, ctx->fh.m2m_ctx); + else + v4l2_m2m_job_finish(dev->dec_dev, ctx->fh.m2m_ctx); +} + +static void job_abort(void *priv) +{ + struct vicodec_ctx *ctx = priv; + + /* Will cancel the transaction in the next interrupt handler */ + ctx->aborting = 1; +} + +/* + * video ioctls + */ + +static u32 find_fmt(u32 fmt) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(pixfmts_yuv); i++) + if (pixfmts_yuv[i] == fmt) + return fmt; + return pixfmts_yuv[0]; +} + +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + strncpy(cap->driver, VICODEC_NAME, sizeof(cap->driver) - 1); + strncpy(cap->card, VICODEC_NAME, sizeof(cap->card) - 1); + snprintf(cap->bus_info, sizeof(cap->bus_info), + "platform:%s", VICODEC_NAME); + cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + return 0; +} + +static int enum_fmt(struct v4l2_fmtdesc *f, bool is_enc, bool is_out) +{ + bool is_yuv = (is_enc && is_out) || (!is_enc && !is_out); + + if (f->index >= (is_yuv ? ARRAY_SIZE(pixfmts_yuv) : 1)) + return -EINVAL; + + if (is_yuv) + f->pixelformat = pixfmts_yuv[f->index]; + else + f->pixelformat = V4L2_PIX_FMT_FWHT; + return 0; +} + +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct vicodec_ctx *ctx = file2ctx(file); + + return enum_fmt(f, ctx->is_enc, false); +} + +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct vicodec_ctx *ctx = file2ctx(file); + + return enum_fmt(f, ctx->is_enc, true); +} + +static int vidioc_g_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f) +{ + struct vb2_queue *vq; + struct vicodec_q_data *q_data; + + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); + if (!vq) + return -EINVAL; + + q_data = get_q_data(ctx, f->type); + + f->fmt.pix.width = q_data->width; + f->fmt.pix.height = q_data->height; + f->fmt.pix.field = V4L2_FIELD_NONE; + f->fmt.pix.pixelformat = q_data->fourcc; + if (q_data->fourcc == V4L2_PIX_FMT_FWHT) + f->fmt.pix.bytesperline = 0; + else + f->fmt.pix.bytesperline = q_data->width; + f->fmt.pix.sizeimage = q_data->sizeimage; + f->fmt.pix.colorspace = ctx->colorspace; + f->fmt.pix.xfer_func = ctx->xfer_func; + f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc; + f->fmt.pix.quantization = ctx->quantization; + + return 0; +} + +static int vidioc_g_fmt_vid_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + return vidioc_g_fmt(file2ctx(file), f); +} + +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + return vidioc_g_fmt(file2ctx(file), f); +} + +static int vidioc_try_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f) +{ + struct v4l2_pix_format *pix = &f->fmt.pix; + + pix->width = clamp(pix->width, MIN_WIDTH, MAX_WIDTH) & ~7; + pix->height = clamp(pix->height, MIN_HEIGHT, MAX_HEIGHT) & ~7; + pix->bytesperline = pix->width; + pix->sizeimage = pix->width * pix->height * 3 / 2; + pix->field = V4L2_FIELD_NONE; + if (pix->pixelformat == V4L2_PIX_FMT_FWHT) { + pix->bytesperline = 0; + pix->sizeimage += sizeof(struct cframe_hdr) + + pix->sizeimage / 64; + } + + return 0; +} + +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct vicodec_ctx *ctx = file2ctx(file); + + f->fmt.pix.pixelformat = ctx->is_enc ? V4L2_PIX_FMT_FWHT : + find_fmt(f->fmt.pix.pixelformat); + f->fmt.pix.colorspace = ctx->colorspace; + f->fmt.pix.xfer_func = ctx->xfer_func; + f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc; + f->fmt.pix.quantization = ctx->quantization; + + return vidioc_try_fmt(ctx, f); +} + +static int vidioc_try_fmt_vid_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct vicodec_ctx *ctx = file2ctx(file); + + f->fmt.pix.pixelformat = !ctx->is_enc ? V4L2_PIX_FMT_FWHT : + find_fmt(f->fmt.pix.pixelformat); + if (!f->fmt.pix.colorspace) + f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; + + return vidioc_try_fmt(ctx, f); +} + +static int vidioc_s_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f) +{ + struct vicodec_q_data *q_data; + struct vb2_queue *vq; + bool fmt_changed = true; + + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); + if (!vq) + return -EINVAL; + + q_data = get_q_data(ctx, f->type); + if (!q_data) + return -EINVAL; + + if (ctx->is_enc && V4L2_TYPE_IS_OUTPUT(f->type)) + fmt_changed = q_data->fourcc != f->fmt.pix.pixelformat || + q_data->width != f->fmt.pix.width || + q_data->height != f->fmt.pix.height; + + if (vb2_is_busy(vq) && fmt_changed) + return -EBUSY; + + q_data->fourcc = f->fmt.pix.pixelformat; + q_data->width = f->fmt.pix.width; + q_data->height = f->fmt.pix.height; + q_data->sizeimage = f->fmt.pix.sizeimage; + + dprintk(ctx->dev, + "Setting format for type %d, wxh: %dx%d, fourcc: %08x\n", + f->type, q_data->width, q_data->height, q_data->fourcc); + + return 0; +} + +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + int ret; + + ret = vidioc_try_fmt_vid_cap(file, priv, f); + if (ret) + return ret; + + return vidioc_s_fmt(file2ctx(file), f); +} + +static int vidioc_s_fmt_vid_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct vicodec_ctx *ctx = file2ctx(file); + int ret; + + ret = vidioc_try_fmt_vid_out(file, priv, f); + if (ret) + return ret; + + ret = vidioc_s_fmt(file2ctx(file), f); + if (!ret) { + ctx->colorspace = f->fmt.pix.colorspace; + ctx->xfer_func = f->fmt.pix.xfer_func; + ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc; + ctx->quantization = f->fmt.pix.quantization; + } + return ret; +} + +static void vicodec_mark_last_buf(struct vicodec_ctx *ctx) +{ + static const struct v4l2_event eos_event = { + .type = V4L2_EVENT_EOS + }; + struct vb2_v4l2_buffer *src_buf, *dst_buf; + + spin_lock(ctx->lock); + src_buf = v4l2_m2m_last_src_buf(ctx->fh.m2m_ctx); + dst_buf = ctx->last_dst_buf; + if (src_buf) { + src_buf->flags |= V4L2_BUF_FLAG_LAST; + } else if (dst_buf) { + dst_buf->flags |= V4L2_BUF_FLAG_LAST; + v4l2_event_queue_fh(&ctx->fh, &eos_event); + } + spin_unlock(ctx->lock); +} + +static int vicodec_try_encoder_cmd(struct file *file, void *fh, + struct v4l2_encoder_cmd *ec) +{ + if (ec->cmd != V4L2_ENC_CMD_STOP) + return -EINVAL; + + if (ec->flags & V4L2_ENC_CMD_STOP_AT_GOP_END) + return -EINVAL; + + return 0; +} + +static int vicodec_encoder_cmd(struct file *file, void *fh, + struct v4l2_encoder_cmd *ec) +{ + struct vicodec_ctx *ctx = file2ctx(file); + int ret; + + ret = vicodec_try_encoder_cmd(file, fh, ec); + if (ret < 0) + return ret; + + vicodec_mark_last_buf(ctx); + return 0; +} + +static int vicodec_try_decoder_cmd(struct file *file, void *fh, + struct v4l2_decoder_cmd *dc) +{ + if (dc->cmd != V4L2_DEC_CMD_STOP) + return -EINVAL; + + if (dc->flags & V4L2_DEC_CMD_STOP_TO_BLACK) + return -EINVAL; + + if (!(dc->flags & V4L2_DEC_CMD_STOP_IMMEDIATELY) && (dc->stop.pts != 0)) + return -EINVAL; + + return 0; +} + +static int vicodec_decoder_cmd(struct file *file, void *fh, + struct v4l2_decoder_cmd *dc) +{ + struct vicodec_ctx *ctx = file2ctx(file); + int ret; + + ret = vicodec_try_decoder_cmd(file, fh, dc); + if (ret < 0) + return ret; + + vicodec_mark_last_buf(ctx); + return 0; +} + +static int vicodec_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + switch (fsize->pixel_format) { + case V4L2_PIX_FMT_FWHT: + break; + default: + if (find_fmt(fsize->pixel_format) == fsize->pixel_format) + break; + return -EINVAL; + } + + if (fsize->index) + return -EINVAL; + + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + + fsize->stepwise.min_width = MIN_WIDTH; + fsize->stepwise.max_width = MAX_WIDTH; + fsize->stepwise.step_width = 8; + fsize->stepwise.min_height = MIN_HEIGHT; + fsize->stepwise.max_height = MAX_HEIGHT; + fsize->stepwise.step_height = 8; + + return 0; +} + +static int vicodec_subscribe_event(struct v4l2_fh *fh, + const struct v4l2_event_subscription *sub) +{ + switch (sub->type) { + case V4L2_EVENT_EOS: + return v4l2_event_subscribe(fh, sub, 0, NULL); + default: + return v4l2_ctrl_subscribe_event(fh, sub); + } +} + +static const struct v4l2_ioctl_ops vicodec_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + + .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, + .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, + .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, + .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, + + .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs, + .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, + .vidioc_qbuf = v4l2_m2m_ioctl_qbuf, + .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, + .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, + .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, + .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, + + .vidioc_streamon = v4l2_m2m_ioctl_streamon, + .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, + + .vidioc_try_encoder_cmd = vicodec_try_encoder_cmd, + .vidioc_encoder_cmd = vicodec_encoder_cmd, + .vidioc_try_decoder_cmd = vicodec_try_decoder_cmd, + .vidioc_decoder_cmd = vicodec_decoder_cmd, + .vidioc_enum_framesizes = vicodec_enum_framesizes, + + .vidioc_subscribe_event = vicodec_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + + +/* + * Queue operations + */ + +static int vicodec_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, + unsigned int *nplanes, unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct vicodec_ctx *ctx = vb2_get_drv_priv(vq); + struct vicodec_q_data *q_data = get_q_data(ctx, vq->type); + unsigned int size = q_data->sizeimage; + + if (*nplanes) + return sizes[0] < size ? -EINVAL : 0; + + *nplanes = 1; + sizes[0] = size; + return 0; +} + +static int vicodec_buf_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + struct vicodec_q_data *q_data; + + dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); + + q_data = get_q_data(ctx, vb->vb2_queue->type); + if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) { + if (vbuf->field == V4L2_FIELD_ANY) + vbuf->field = V4L2_FIELD_NONE; + if (vbuf->field != V4L2_FIELD_NONE) { + dprintk(ctx->dev, "%s field isn't supported\n", + __func__); + return -EINVAL; + } + } + + if (vb2_plane_size(vb, 0) < q_data->sizeimage) { + dprintk(ctx->dev, + "%s data will not fit into plane (%lu < %lu)\n", + __func__, vb2_plane_size(vb, 0), + (long)q_data->sizeimage); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, q_data->sizeimage); + + return 0; +} + +static void vicodec_buf_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + + v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf); +} + +static void vicodec_return_bufs(struct vb2_queue *q, u32 state) +{ + struct vicodec_ctx *ctx = vb2_get_drv_priv(q); + struct vb2_v4l2_buffer *vbuf; + + for (;;) { + if (V4L2_TYPE_IS_OUTPUT(q->type)) + vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); + else + vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); + if (vbuf == NULL) + return; + spin_lock(ctx->lock); + v4l2_m2m_buf_done(vbuf, state); + spin_unlock(ctx->lock); + } +} + +static int vicodec_start_streaming(struct vb2_queue *q, + unsigned int count) +{ + struct vicodec_ctx *ctx = vb2_get_drv_priv(q); + struct vicodec_q_data *q_data = get_q_data(ctx, q->type); + unsigned int size = q_data->width * q_data->height; + + q_data->sequence = 0; + + if (!V4L2_TYPE_IS_OUTPUT(q->type)) + return 0; + + ctx->ref_frame.width = ctx->ref_frame.height = 0; + ctx->ref_frame.luma = kvmalloc(size * 3 / 2, GFP_KERNEL); + if (!ctx->ref_frame.luma) { + vicodec_return_bufs(q, VB2_BUF_STATE_QUEUED); + return -ENOMEM; + } + ctx->ref_frame.cb = ctx->ref_frame.luma + size; + ctx->ref_frame.cr = ctx->ref_frame.cb + size / 4; + ctx->last_dst_buf = NULL; + v4l2_ctrl_grab(ctx->ctrl_gop_size, true); + ctx->gop_size = v4l2_ctrl_g_ctrl(ctx->ctrl_gop_size); + ctx->gop_cnt = 0; + + return 0; +} + +static void vicodec_stop_streaming(struct vb2_queue *q) +{ + struct vicodec_ctx *ctx = vb2_get_drv_priv(q); + + vicodec_return_bufs(q, VB2_BUF_STATE_ERROR); + + if (!V4L2_TYPE_IS_OUTPUT(q->type)) + return; + + kvfree(ctx->ref_frame.luma); + v4l2_ctrl_grab(ctx->ctrl_gop_size, false); +} + +static const struct vb2_ops vicodec_qops = { + .queue_setup = vicodec_queue_setup, + .buf_prepare = vicodec_buf_prepare, + .buf_queue = vicodec_buf_queue, + .start_streaming = vicodec_start_streaming, + .stop_streaming = vicodec_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +static int queue_init(void *priv, struct vb2_queue *src_vq, + struct vb2_queue *dst_vq) +{ + struct vicodec_ctx *ctx = priv; + int ret; + + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; + src_vq->drv_priv = ctx; + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); + src_vq->ops = &vicodec_qops; + src_vq->mem_ops = &vb2_vmalloc_memops; + src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; + src_vq->lock = ctx->is_enc ? &ctx->dev->enc_mutex : + &ctx->dev->dec_mutex; + + ret = vb2_queue_init(src_vq); + if (ret) + return ret; + + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; + dst_vq->drv_priv = ctx; + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); + dst_vq->ops = &vicodec_qops; + dst_vq->mem_ops = &vb2_vmalloc_memops; + dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; + dst_vq->lock = src_vq->lock; + + return vb2_queue_init(dst_vq); +} + +/* + * File operations + */ +static int vicodec_open(struct file *file) +{ + struct video_device *vfd = video_devdata(file); + struct vicodec_dev *dev = video_drvdata(file); + struct vicodec_ctx *ctx = NULL; + struct v4l2_ctrl_handler *hdl; + int rc = 0; + + if (mutex_lock_interruptible(vfd->lock)) + return -ERESTARTSYS; + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) { + rc = -ENOMEM; + goto open_unlock; + } + + if (vfd == &dev->enc_vfd) + ctx->is_enc = true; + + v4l2_fh_init(&ctx->fh, video_devdata(file)); + file->private_data = &ctx->fh; + ctx->dev = dev; + hdl = &ctx->hdl; + v4l2_ctrl_handler_init(hdl, 4); + ctx->ctrl_gop_size = v4l2_ctrl_new_std(hdl, NULL, + V4L2_CID_MPEG_VIDEO_GOP_SIZE, + 1, 16, 1, 10); + if (hdl->error) { + rc = hdl->error; + v4l2_ctrl_handler_free(hdl); + kfree(ctx); + goto open_unlock; + } + ctx->fh.ctrl_handler = hdl; + v4l2_ctrl_handler_setup(hdl); + + ctx->q_data[V4L2_M2M_SRC].fourcc = + ctx->is_enc ? V4L2_PIX_FMT_YUV420 : V4L2_PIX_FMT_FWHT; + ctx->q_data[V4L2_M2M_SRC].width = 1280; + ctx->q_data[V4L2_M2M_SRC].height = 720; + ctx->q_data[V4L2_M2M_SRC].sizeimage = 1280 * 720 * 3 / 2; + ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC]; + ctx->q_data[V4L2_M2M_DST].fourcc = + ctx->is_enc ? V4L2_PIX_FMT_FWHT : V4L2_PIX_FMT_YUV420; + ctx->colorspace = V4L2_COLORSPACE_REC709; + + if (ctx->is_enc) { + ctx->q_data[V4L2_M2M_DST].sizeimage += + sizeof(struct cframe_hdr) + + ctx->q_data[V4L2_M2M_DST].sizeimage / 64; + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->enc_dev, ctx, + &queue_init); + ctx->lock = &dev->enc_lock; + } else { + ctx->q_data[V4L2_M2M_SRC].sizeimage += + sizeof(struct cframe_hdr) + + ctx->q_data[V4L2_M2M_SRC].sizeimage / 64; + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->dec_dev, ctx, + &queue_init); + ctx->lock = &dev->dec_lock; + } + + if (IS_ERR(ctx->fh.m2m_ctx)) { + rc = PTR_ERR(ctx->fh.m2m_ctx); + + v4l2_ctrl_handler_free(hdl); + v4l2_fh_exit(&ctx->fh); + kfree(ctx); + goto open_unlock; + } + + v4l2_fh_add(&ctx->fh); + +open_unlock: + mutex_unlock(vfd->lock); + return rc; +} + +static int vicodec_release(struct file *file) +{ + struct video_device *vfd = video_devdata(file); + struct vicodec_ctx *ctx = file2ctx(file); + + v4l2_fh_del(&ctx->fh); + v4l2_fh_exit(&ctx->fh); + v4l2_ctrl_handler_free(&ctx->hdl); + mutex_lock(vfd->lock); + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); + mutex_unlock(vfd->lock); + kfree(ctx); + + return 0; +} + +static const struct v4l2_file_operations vicodec_fops = { + .owner = THIS_MODULE, + .open = vicodec_open, + .release = vicodec_release, + .poll = v4l2_m2m_fop_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = v4l2_m2m_fop_mmap, +}; + +static const struct video_device vicodec_videodev = { + .name = VICODEC_NAME, + .vfl_dir = VFL_DIR_M2M, + .fops = &vicodec_fops, + .ioctl_ops = &vicodec_ioctl_ops, + .minor = -1, + .release = video_device_release_empty, +}; + +static const struct v4l2_m2m_ops m2m_ops = { + .device_run = device_run, + .job_abort = job_abort, +}; + +static int vicodec_probe(struct platform_device *pdev) +{ + struct vicodec_dev *dev; + struct video_device *vfd; + int ret; + + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + spin_lock_init(&dev->enc_lock); + spin_lock_init(&dev->dec_lock); + + ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); + if (ret) + return ret; + +#ifdef CONFIG_MEDIA_CONTROLLER + dev->mdev.dev = &pdev->dev; + strlcpy(dev->mdev.model, "vicodec", sizeof(dev->mdev.model)); + media_device_init(&dev->mdev); + dev->v4l2_dev.mdev = &dev->mdev; +#endif + + mutex_init(&dev->enc_mutex); + mutex_init(&dev->dec_mutex); + + platform_set_drvdata(pdev, dev); + + dev->enc_dev = v4l2_m2m_init(&m2m_ops); + if (IS_ERR(dev->enc_dev)) { + v4l2_err(&dev->v4l2_dev, "Failed to init vicodec device\n"); + ret = PTR_ERR(dev->enc_dev); + goto unreg_dev; + } + + dev->dec_dev = v4l2_m2m_init(&m2m_ops); + if (IS_ERR(dev->dec_dev)) { + v4l2_err(&dev->v4l2_dev, "Failed to init vicodec device\n"); + ret = PTR_ERR(dev->dec_dev); + goto err_enc_m2m; + } + + dev->enc_vfd = vicodec_videodev; + vfd = &dev->enc_vfd; + vfd->lock = &dev->enc_mutex; + vfd->v4l2_dev = &dev->v4l2_dev; + strlcpy(vfd->name, "vicodec-enc", sizeof(vfd->name)); + v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD); + v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD); + video_set_drvdata(vfd, dev); + + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); + goto err_dec_m2m; + } + v4l2_info(&dev->v4l2_dev, + "Device registered as /dev/video%d\n", vfd->num); + + dev->dec_vfd = vicodec_videodev; + vfd = &dev->dec_vfd; + vfd->lock = &dev->dec_mutex; + vfd->v4l2_dev = &dev->v4l2_dev; + strlcpy(vfd->name, "vicodec-dec", sizeof(vfd->name)); + v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD); + v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD); + video_set_drvdata(vfd, dev); + + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); + goto unreg_enc; + } + v4l2_info(&dev->v4l2_dev, + "Device registered as /dev/video%d\n", vfd->num); + +#ifdef CONFIG_MEDIA_CONTROLLER + ret = v4l2_m2m_register_media_controller(dev->enc_dev, + &dev->enc_vfd, MEDIA_ENT_F_PROC_VIDEO_SCALER); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n"); + goto unreg_m2m; + } + + ret = v4l2_m2m_register_media_controller(dev->dec_dev, + &dev->dec_vfd, MEDIA_ENT_F_PROC_VIDEO_SCALER); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n"); + goto unreg_m2m_enc_mc; + } + + ret = media_device_register(&dev->mdev); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n"); + goto unreg_m2m_dec_mc; + } +#endif + return 0; + +#ifdef CONFIG_MEDIA_CONTROLLER +unreg_m2m_dec_mc: + v4l2_m2m_unregister_media_controller(dev->dec_dev); +unreg_m2m_enc_mc: + v4l2_m2m_unregister_media_controller(dev->enc_dev); +unreg_m2m: + video_unregister_device(&dev->dec_vfd); +#endif +unreg_enc: + video_unregister_device(&dev->enc_vfd); +err_dec_m2m: + v4l2_m2m_release(dev->dec_dev); +err_enc_m2m: + v4l2_m2m_release(dev->enc_dev); +unreg_dev: + v4l2_device_unregister(&dev->v4l2_dev); + + return ret; +} + +static int vicodec_remove(struct platform_device *pdev) +{ + struct vicodec_dev *dev = platform_get_drvdata(pdev); + + v4l2_info(&dev->v4l2_dev, "Removing " VICODEC_NAME); + +#ifdef CONFIG_MEDIA_CONTROLLER + media_device_unregister(&dev->mdev); + v4l2_m2m_unregister_media_controller(dev->enc_dev); + v4l2_m2m_unregister_media_controller(dev->dec_dev); + media_device_cleanup(&dev->mdev); +#endif + + v4l2_m2m_release(dev->enc_dev); + v4l2_m2m_release(dev->dec_dev); + video_unregister_device(&dev->enc_vfd); + video_unregister_device(&dev->dec_vfd); + v4l2_device_unregister(&dev->v4l2_dev); + + return 0; +} + +static struct platform_driver vicodec_pdrv = { + .probe = vicodec_probe, + .remove = vicodec_remove, + .driver = { + .name = VICODEC_NAME, + }, +}; + +static void __exit vicodec_exit(void) +{ + platform_driver_unregister(&vicodec_pdrv); + platform_device_unregister(&vicodec_pdev); +} + +static int __init vicodec_init(void) +{ + int ret; + + ret = platform_device_register(&vicodec_pdev); + if (ret) + return ret; + + ret = platform_driver_register(&vicodec_pdrv); + if (ret) + platform_device_unregister(&vicodec_pdev); + + return ret; +} + +module_init(vicodec_init); +module_exit(vicodec_exit); -- 2.18.0
