media: staging: media: starfive: camss: Add video driver
Add video driver for StarFive Camera Subsystem. Signed-off-by: Jack Zhu <jack.zhu@starfivetech.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Jack Zhu
Hans Verkuil
parent
bba185d141
commit
b7eedc7d2b
@ -4,6 +4,7 @@
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#
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starfive-camss-objs += \
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stf-camss.o
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stf-camss.o \
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stf-video.o
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obj-$(CONFIG_VIDEO_STARFIVE_CAMSS) += starfive-camss.o
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572
drivers/staging/media/starfive/camss/stf-video.c
Normal file
572
drivers/staging/media/starfive/camss/stf-video.c
Normal file
@ -0,0 +1,572 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* stf_video.c
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*
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* StarFive Camera Subsystem - V4L2 device node
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*
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* Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
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*/
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#include <linux/pm_runtime.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-event.h>
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#include <media/v4l2-mc.h>
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#include <media/videobuf2-dma-contig.h>
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#include "stf-camss.h"
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#include "stf-video.h"
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/* -----------------------------------------------------------------------------
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* Helper functions
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*/
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static inline struct stfcamss_buffer *
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to_stfcamss_buffer(struct vb2_v4l2_buffer *vbuf)
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{
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return container_of(vbuf, struct stfcamss_buffer, vb);
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}
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static const struct stfcamss_format_info *
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video_g_fi_by_index(struct stfcamss_video *video, int index)
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{
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if (index >= video->nformats)
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return NULL;
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return &video->formats[index];
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}
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static const struct stfcamss_format_info *
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video_g_fi_by_mcode(struct stfcamss_video *video, u32 mcode)
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{
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unsigned int i;
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for (i = 0; i < video->nformats; i++) {
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if (video->formats[i].code == mcode)
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return &video->formats[i];
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}
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return NULL;
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}
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static const struct stfcamss_format_info *
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video_g_fi_by_pfmt(struct stfcamss_video *video, u32 pixelformat)
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{
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unsigned int i;
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for (i = 0; i < video->nformats; i++) {
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if (video->formats[i].pixelformat == pixelformat)
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return &video->formats[i];
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}
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return NULL;
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}
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static int __video_try_fmt(struct stfcamss_video *video, struct v4l2_format *f)
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{
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struct v4l2_pix_format *pix = &f->fmt.pix;
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const struct stfcamss_format_info *fi;
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u32 width, height;
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u32 bpl;
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unsigned int i;
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fi = video_g_fi_by_pfmt(video, pix->pixelformat);
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if (!fi)
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fi = &video->formats[0]; /* default format */
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width = pix->width;
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height = pix->height;
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memset(pix, 0, sizeof(*pix));
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pix->pixelformat = fi->pixelformat;
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pix->width = clamp_t(u32, width, STFCAMSS_FRAME_MIN_WIDTH,
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STFCAMSS_FRAME_MAX_WIDTH);
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pix->height = clamp_t(u32, height, STFCAMSS_FRAME_MIN_HEIGHT,
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STFCAMSS_FRAME_MAX_HEIGHT);
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bpl = pix->width * fi->bpp / 8;
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bpl = ALIGN(bpl, video->bpl_alignment);
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pix->bytesperline = bpl;
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for (i = 0; i < fi->planes; ++i)
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pix->sizeimage += bpl * pix->height / fi->vsub[i];
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pix->field = V4L2_FIELD_NONE;
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pix->colorspace = V4L2_COLORSPACE_SRGB;
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pix->flags = 0;
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pix->ycbcr_enc =
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V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace);
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pix->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
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pix->colorspace,
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pix->ycbcr_enc);
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pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace);
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return 0;
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}
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static int stf_video_init_format(struct stfcamss_video *video)
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{
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int ret;
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struct v4l2_format format = {
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.type = video->type,
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.fmt.pix = {
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.width = 1920,
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.height = 1080,
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.pixelformat = V4L2_PIX_FMT_NV12,
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},
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};
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ret = __video_try_fmt(video, &format);
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if (ret < 0)
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return ret;
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video->active_fmt = format;
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return 0;
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}
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/* -----------------------------------------------------------------------------
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* Video queue operations
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*/
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static int video_queue_setup(struct vb2_queue *q,
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unsigned int *num_buffers,
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unsigned int *num_planes,
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unsigned int sizes[],
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struct device *alloc_devs[])
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{
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struct stfcamss_video *video = vb2_get_drv_priv(q);
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const struct v4l2_pix_format *format = &video->active_fmt.fmt.pix;
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if (*num_planes) {
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if (*num_planes != 1)
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return -EINVAL;
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if (sizes[0] < format->sizeimage)
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return -EINVAL;
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} else {
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*num_planes = 1;
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sizes[0] = format->sizeimage;
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}
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if (!sizes[0]) {
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dev_dbg(video->stfcamss->dev,
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"%s: error size is zero.\n", __func__);
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return -EINVAL;
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}
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dev_dbg(video->stfcamss->dev, "planes = %d, size = %d\n",
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*num_planes, sizes[0]);
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return 0;
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}
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static int video_buf_init(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct stfcamss_video *video = vb2_get_drv_priv(vb->vb2_queue);
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struct stfcamss_buffer *buffer = to_stfcamss_buffer(vbuf);
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const struct v4l2_pix_format *fmt = &video->active_fmt.fmt.pix;
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dma_addr_t *paddr;
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paddr = vb2_plane_cookie(vb, 0);
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buffer->addr[0] = *paddr;
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if (fmt->pixelformat == V4L2_PIX_FMT_NV12)
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buffer->addr[1] =
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buffer->addr[0] + fmt->bytesperline * fmt->height;
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return 0;
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}
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static int video_buf_prepare(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct stfcamss_video *video = vb2_get_drv_priv(vb->vb2_queue);
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const struct v4l2_pix_format *fmt = &video->active_fmt.fmt.pix;
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if (fmt->sizeimage > vb2_plane_size(vb, 0)) {
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dev_dbg(video->stfcamss->dev,
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"sizeimage = %u, plane size = %u\n",
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fmt->sizeimage, (unsigned int)vb2_plane_size(vb, 0));
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, fmt->sizeimage);
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vbuf->field = V4L2_FIELD_NONE;
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return 0;
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}
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static void video_buf_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct stfcamss_video *video = vb2_get_drv_priv(vb->vb2_queue);
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struct stfcamss_buffer *buffer = to_stfcamss_buffer(vbuf);
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video->ops->queue_buffer(video, buffer);
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}
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static int video_get_subdev_format(struct stfcamss_video *video,
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struct v4l2_subdev_format *fmt)
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{
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struct v4l2_subdev *subdev;
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struct media_pad *pad;
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struct media_entity *entity;
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int ret;
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entity = &video->vdev.entity;
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while (1) {
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pad = &entity->pads[0];
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if (!(pad->flags & MEDIA_PAD_FL_SINK))
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break;
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pad = media_pad_remote_pad_first(pad);
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if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
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break;
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entity = pad->entity;
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subdev = media_entity_to_v4l2_subdev(entity);
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fmt->pad = pad->index;
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ret = v4l2_subdev_call_state_active(subdev, pad, get_fmt, fmt);
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if (ret < 0 && ret != -ENOIOCTLCMD)
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return ret;
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else if (!ret)
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break;
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}
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return 0;
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}
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static int stf_video_check_format(struct stfcamss_video *video)
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{
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struct v4l2_pix_format *pix = &video->active_fmt.fmt.pix;
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const struct stfcamss_format_info *fi;
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int ret;
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struct v4l2_subdev_format sd_fmt = {
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.which = V4L2_SUBDEV_FORMAT_ACTIVE,
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};
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ret = video_get_subdev_format(video, &sd_fmt);
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if (ret < 0)
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return ret;
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fi = video_g_fi_by_mcode(video, sd_fmt.format.code);
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if (!fi)
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return -EINVAL;
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if (pix->pixelformat != fi->pixelformat ||
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pix->height != sd_fmt.format.height ||
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pix->width != sd_fmt.format.width ||
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pix->field != sd_fmt.format.field)
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return -EPIPE;
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return 0;
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}
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static int video_start_streaming(struct vb2_queue *q, unsigned int count)
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{
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struct stfcamss_video *video = vb2_get_drv_priv(q);
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struct video_device *vdev = &video->vdev;
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int ret;
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ret = video_device_pipeline_start(vdev, &video->stfcamss->pipe);
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if (ret < 0) {
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dev_err(video->stfcamss->dev,
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"Failed to media_pipeline_start: %d\n", ret);
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goto err_ret_buffers;
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}
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ret = pm_runtime_resume_and_get(video->stfcamss->dev);
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if (ret < 0) {
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dev_err(video->stfcamss->dev, "power up failed %d\n", ret);
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goto err_pipeline_stop;
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}
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video->ops->start_streaming(video);
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ret = v4l2_subdev_call(video->source_subdev, video, s_stream, true);
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if (ret) {
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dev_err(video->stfcamss->dev, "stream on failed\n");
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goto err_pm_put;
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}
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return 0;
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err_pm_put:
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pm_runtime_put(video->stfcamss->dev);
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err_pipeline_stop:
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video_device_pipeline_stop(vdev);
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err_ret_buffers:
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video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);
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return ret;
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}
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static void video_stop_streaming(struct vb2_queue *q)
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{
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struct stfcamss_video *video = vb2_get_drv_priv(q);
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struct video_device *vdev = &video->vdev;
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video->ops->stop_streaming(video);
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v4l2_subdev_call(video->source_subdev, video, s_stream, false);
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pm_runtime_put(video->stfcamss->dev);
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video_device_pipeline_stop(vdev);
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video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
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}
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static const struct vb2_ops stf_video_vb2_q_ops = {
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.queue_setup = video_queue_setup,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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.buf_init = video_buf_init,
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.buf_prepare = video_buf_prepare,
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.buf_queue = video_buf_queue,
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.start_streaming = video_start_streaming,
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.stop_streaming = video_stop_streaming,
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};
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/* -----------------------------------------------------------------------------
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* V4L2 ioctls
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*/
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static int video_querycap(struct file *file, void *fh,
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struct v4l2_capability *cap)
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{
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strscpy(cap->driver, "starfive-camss", sizeof(cap->driver));
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strscpy(cap->card, "Starfive Camera Subsystem", sizeof(cap->card));
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return 0;
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}
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static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
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{
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struct stfcamss_video *video = video_drvdata(file);
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const struct stfcamss_format_info *fi;
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if (f->index >= video->nformats)
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return -EINVAL;
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if (f->mbus_code) {
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/* Each entry in formats[] table has unique mbus_code */
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if (f->index > 0)
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return -EINVAL;
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fi = video_g_fi_by_mcode(video, f->mbus_code);
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} else {
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fi = video_g_fi_by_index(video, f->index);
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}
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if (!fi)
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return -EINVAL;
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f->pixelformat = fi->pixelformat;
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return 0;
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}
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static int video_enum_framesizes(struct file *file, void *fh,
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struct v4l2_frmsizeenum *fsize)
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{
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struct stfcamss_video *video = video_drvdata(file);
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unsigned int i;
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if (fsize->index)
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return -EINVAL;
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for (i = 0; i < video->nformats; i++) {
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if (video->formats[i].pixelformat == fsize->pixel_format)
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break;
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}
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if (i == video->nformats)
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return -EINVAL;
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fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
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fsize->stepwise.min_width = STFCAMSS_FRAME_MIN_WIDTH;
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fsize->stepwise.max_width = STFCAMSS_FRAME_MAX_WIDTH;
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fsize->stepwise.min_height = STFCAMSS_FRAME_MIN_HEIGHT;
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fsize->stepwise.max_height = STFCAMSS_FRAME_MAX_HEIGHT;
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fsize->stepwise.step_width = 1;
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fsize->stepwise.step_height = 1;
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return 0;
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}
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static int video_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
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{
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struct stfcamss_video *video = video_drvdata(file);
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*f = video->active_fmt;
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return 0;
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}
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static int video_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
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{
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struct stfcamss_video *video = video_drvdata(file);
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int ret;
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if (vb2_is_busy(&video->vb2_q))
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return -EBUSY;
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ret = __video_try_fmt(video, f);
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if (ret < 0)
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return ret;
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video->active_fmt = *f;
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return 0;
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}
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static int video_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
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{
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struct stfcamss_video *video = video_drvdata(file);
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return __video_try_fmt(video, f);
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}
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static const struct v4l2_ioctl_ops stf_vid_ioctl_ops = {
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.vidioc_querycap = video_querycap,
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.vidioc_enum_fmt_vid_cap = video_enum_fmt,
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.vidioc_enum_framesizes = video_enum_framesizes,
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.vidioc_g_fmt_vid_cap = video_g_fmt,
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.vidioc_s_fmt_vid_cap = video_s_fmt,
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.vidioc_try_fmt_vid_cap = video_try_fmt,
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.vidioc_reqbufs = vb2_ioctl_reqbufs,
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.vidioc_querybuf = vb2_ioctl_querybuf,
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.vidioc_qbuf = vb2_ioctl_qbuf,
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.vidioc_expbuf = vb2_ioctl_expbuf,
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.vidioc_dqbuf = vb2_ioctl_dqbuf,
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.vidioc_create_bufs = vb2_ioctl_create_bufs,
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.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
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.vidioc_streamon = vb2_ioctl_streamon,
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.vidioc_streamoff = vb2_ioctl_streamoff,
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};
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/* -----------------------------------------------------------------------------
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* V4L2 file operations
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*/
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static const struct v4l2_file_operations stf_vid_fops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = video_ioctl2,
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.open = v4l2_fh_open,
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.release = vb2_fop_release,
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.poll = vb2_fop_poll,
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.mmap = vb2_fop_mmap,
|
||||
.read = vb2_fop_read,
|
||||
};
|
||||
|
||||
/* -----------------------------------------------------------------------------
|
||||
* STFCAMSS video core
|
||||
*/
|
||||
|
||||
static int stf_link_validate(struct media_link *link)
|
||||
{
|
||||
struct video_device *vdev =
|
||||
media_entity_to_video_device(link->sink->entity);
|
||||
struct stfcamss_video *video = video_get_drvdata(vdev);
|
||||
int ret;
|
||||
|
||||
ret = stf_video_check_format(video);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct media_entity_operations stf_media_ops = {
|
||||
.link_validate = stf_link_validate,
|
||||
};
|
||||
|
||||
static void stf_video_release(struct video_device *vdev)
|
||||
{
|
||||
struct stfcamss_video *video = video_get_drvdata(vdev);
|
||||
|
||||
media_entity_cleanup(&vdev->entity);
|
||||
|
||||
mutex_destroy(&video->q_lock);
|
||||
mutex_destroy(&video->lock);
|
||||
}
|
||||
|
||||
int stf_video_register(struct stfcamss_video *video,
|
||||
struct v4l2_device *v4l2_dev, const char *name)
|
||||
{
|
||||
struct video_device *vdev = &video->vdev;
|
||||
struct vb2_queue *q;
|
||||
struct media_pad *pad = &video->pad;
|
||||
int ret;
|
||||
|
||||
mutex_init(&video->q_lock);
|
||||
mutex_init(&video->lock);
|
||||
|
||||
q = &video->vb2_q;
|
||||
q->drv_priv = video;
|
||||
q->mem_ops = &vb2_dma_contig_memops;
|
||||
q->ops = &stf_video_vb2_q_ops;
|
||||
q->type = video->type;
|
||||
q->io_modes = VB2_DMABUF | VB2_MMAP;
|
||||
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
||||
q->buf_struct_size = sizeof(struct stfcamss_buffer);
|
||||
q->dev = video->stfcamss->dev;
|
||||
q->lock = &video->q_lock;
|
||||
q->min_buffers_needed = STFCAMSS_MIN_BUFFERS;
|
||||
ret = vb2_queue_init(q);
|
||||
if (ret < 0) {
|
||||
dev_err(video->stfcamss->dev,
|
||||
"Failed to init vb2 queue: %d\n", ret);
|
||||
goto err_mutex_destroy;
|
||||
}
|
||||
|
||||
pad->flags = MEDIA_PAD_FL_SINK;
|
||||
ret = media_entity_pads_init(&vdev->entity, 1, pad);
|
||||
if (ret < 0) {
|
||||
dev_err(video->stfcamss->dev,
|
||||
"Failed to init video entity: %d\n", ret);
|
||||
goto err_mutex_destroy;
|
||||
}
|
||||
|
||||
ret = stf_video_init_format(video);
|
||||
if (ret < 0) {
|
||||
dev_err(video->stfcamss->dev,
|
||||
"Failed to init format: %d\n", ret);
|
||||
goto err_media_cleanup;
|
||||
}
|
||||
|
||||
vdev->fops = &stf_vid_fops;
|
||||
vdev->ioctl_ops = &stf_vid_ioctl_ops;
|
||||
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
||||
vdev->entity.ops = &stf_media_ops;
|
||||
vdev->vfl_dir = VFL_DIR_RX;
|
||||
vdev->release = stf_video_release;
|
||||
vdev->v4l2_dev = v4l2_dev;
|
||||
vdev->queue = &video->vb2_q;
|
||||
vdev->lock = &video->lock;
|
||||
strscpy(vdev->name, name, sizeof(vdev->name));
|
||||
|
||||
video_set_drvdata(vdev, video);
|
||||
|
||||
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
|
||||
if (ret < 0) {
|
||||
dev_err(video->stfcamss->dev,
|
||||
"Failed to register video device: %d\n", ret);
|
||||
goto err_media_cleanup;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_media_cleanup:
|
||||
media_entity_cleanup(&vdev->entity);
|
||||
err_mutex_destroy:
|
||||
mutex_destroy(&video->lock);
|
||||
mutex_destroy(&video->q_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
void stf_video_unregister(struct stfcamss_video *video)
|
||||
{
|
||||
vb2_video_unregister_device(&video->vdev);
|
||||
}
|
||||
100
drivers/staging/media/starfive/camss/stf-video.h
Normal file
100
drivers/staging/media/starfive/camss/stf-video.h
Normal file
@ -0,0 +1,100 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* stf_video.h
|
||||
*
|
||||
* StarFive Camera Subsystem - V4L2 device node
|
||||
*
|
||||
* Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
|
||||
*/
|
||||
|
||||
#ifndef STF_VIDEO_H
|
||||
#define STF_VIDEO_H
|
||||
|
||||
#include <linux/list.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/videodev2.h>
|
||||
#include <media/v4l2-dev.h>
|
||||
#include <media/v4l2-fh.h>
|
||||
#include <media/v4l2-ioctl.h>
|
||||
#include <media/videobuf2-v4l2.h>
|
||||
|
||||
#define STFCAMSS_FRAME_MIN_WIDTH 64
|
||||
#define STFCAMSS_FRAME_MAX_WIDTH 1920
|
||||
#define STFCAMSS_FRAME_MIN_HEIGHT 64
|
||||
#define STFCAMSS_FRAME_MAX_HEIGHT 1080
|
||||
#define STFCAMSS_FRAME_WIDTH_ALIGN_8 8
|
||||
#define STFCAMSS_FRAME_WIDTH_ALIGN_128 128
|
||||
#define STFCAMSS_MIN_BUFFERS 2
|
||||
|
||||
#define STFCAMSS_MAX_ENTITY_NAME_LEN 27
|
||||
|
||||
enum stf_v_line_id {
|
||||
STF_V_LINE_WR = 0,
|
||||
STF_V_LINE_ISP,
|
||||
STF_V_LINE_MAX,
|
||||
};
|
||||
|
||||
enum stf_capture_type {
|
||||
STF_CAPTURE_RAW = 0,
|
||||
STF_CAPTURE_YUV,
|
||||
STF_CAPTURE_NUM,
|
||||
};
|
||||
|
||||
struct stfcamss_buffer {
|
||||
struct vb2_v4l2_buffer vb;
|
||||
dma_addr_t addr[2];
|
||||
struct list_head queue;
|
||||
};
|
||||
|
||||
struct fract {
|
||||
u8 numerator;
|
||||
u8 denominator;
|
||||
};
|
||||
|
||||
/*
|
||||
* struct stfcamss_format_info - ISP media bus format information
|
||||
* @code: V4L2 media bus format code
|
||||
* @pixelformat: V4L2 pixel format FCC identifier
|
||||
* @planes: Number of planes
|
||||
* @vsub: Vertical subsampling (for each plane)
|
||||
* @bpp: Bits per pixel when stored in memory (for each plane)
|
||||
*/
|
||||
struct stfcamss_format_info {
|
||||
u32 code;
|
||||
u32 pixelformat;
|
||||
u8 planes;
|
||||
u8 vsub[3];
|
||||
u8 bpp;
|
||||
};
|
||||
|
||||
struct stfcamss_video {
|
||||
struct stfcamss *stfcamss;
|
||||
struct vb2_queue vb2_q;
|
||||
struct video_device vdev;
|
||||
struct media_pad pad;
|
||||
struct v4l2_format active_fmt;
|
||||
enum v4l2_buf_type type;
|
||||
const struct stfcamss_video_ops *ops;
|
||||
struct mutex lock; /* serialize device access */
|
||||
struct mutex q_lock; /* protects the queue */
|
||||
unsigned int bpl_alignment;
|
||||
const struct stfcamss_format_info *formats;
|
||||
unsigned int nformats;
|
||||
struct v4l2_subdev *source_subdev;
|
||||
};
|
||||
|
||||
struct stfcamss_video_ops {
|
||||
int (*queue_buffer)(struct stfcamss_video *video,
|
||||
struct stfcamss_buffer *buf);
|
||||
int (*flush_buffers)(struct stfcamss_video *video,
|
||||
enum vb2_buffer_state state);
|
||||
void (*start_streaming)(struct stfcamss_video *video);
|
||||
void (*stop_streaming)(struct stfcamss_video *video);
|
||||
};
|
||||
|
||||
int stf_video_register(struct stfcamss_video *video,
|
||||
struct v4l2_device *v4l2_dev, const char *name);
|
||||
|
||||
void stf_video_unregister(struct stfcamss_video *video);
|
||||
|
||||
#endif /* STF_VIDEO_H */
|
||||
Loading…
x
Reference in New Issue
Block a user