From 949bd4081ffe953af98b6ac7ebe0a8d59996fce9 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Thu, 5 Mar 2015 17:33:17 -0300 Subject: [PATCH] [media] marvell-ccic: use vb2 helpers and core locking Use the V4L2 core locking system instead of rolling your own. Switch to the vb2 fop and ioctl helpers to get rid of a lot of code. This also made it easy to add VB2_READ to the DMA modes, since you get read() for free with vb2 and these helpers. Finally remove the users field: this information is also available from the core framework, no need to keep track of it in the driver. Signed-off-by: Hans Verkuil Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab --- .../media/platform/marvell-ccic/mcam-core.c | 218 ++++-------------- .../media/platform/marvell-ccic/mcam-core.h | 1 - 2 files changed, 43 insertions(+), 176 deletions(-) diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c index 4d501823ede1..b6b838fd0af8 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.c +++ b/drivers/media/platform/marvell-ccic/mcam-core.c @@ -971,7 +971,6 @@ static int mcam_cam_init(struct mcam_camera *cam) { int ret; - mutex_lock(&cam->s_mutex); if (cam->state != S_NOTREADY) cam_warn(cam, "Cam init with device in funky state %d", cam->state); @@ -979,7 +978,6 @@ static int mcam_cam_init(struct mcam_camera *cam) /* Get/set parameters? */ cam->state = S_IDLE; mcam_ctlr_power_down(cam); - mutex_unlock(&cam->s_mutex); return ret; } @@ -1116,6 +1114,9 @@ static int mcam_vb_start_streaming(struct vb2_queue *vq, unsigned int count) INIT_LIST_HEAD(&cam->buffers); return -EINVAL; } + cam->frame_state.frames = 0; + cam->frame_state.singles = 0; + cam->frame_state.delivered = 0; cam->sequence = 0; /* * Videobuf2 sneakily hoards all the buffers and won't @@ -1144,6 +1145,9 @@ static void mcam_vb_stop_streaming(struct vb2_queue *vq) struct mcam_camera *cam = vb2_get_drv_priv(vq); unsigned long flags; + cam_dbg(cam, "stop_streaming: %d frames, %d singles, %d delivered\n", + cam->frame_state.frames, cam->frame_state.singles, + cam->frame_state.delivered); if (cam->state == S_BUFWAIT) { /* They never gave us buffers */ cam->state = S_IDLE; @@ -1256,7 +1260,7 @@ static int mcam_setup_vb2(struct mcam_camera *cam) vq->ops = &mcam_vb2_ops; vq->mem_ops = &vb2_dma_contig_memops; vq->buf_struct_size = sizeof(struct mcam_vb_buffer); - vq->io_modes = VB2_MMAP | VB2_USERPTR; + vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; cam->dma_setup = mcam_ctlr_dma_contig; cam->frame_complete = mcam_dma_contig_done; cam->vb_alloc_ctx = vb2_dma_contig_init_ctx(cam->dev); @@ -1269,7 +1273,7 @@ static int mcam_setup_vb2(struct mcam_camera *cam) vq->ops = &mcam_vb2_sg_ops; vq->mem_ops = &vb2_dma_sg_memops; vq->buf_struct_size = sizeof(struct mcam_vb_buffer); - vq->io_modes = VB2_MMAP | VB2_USERPTR; + vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; cam->dma_setup = mcam_ctlr_dma_sg; cam->frame_complete = mcam_dma_sg_done; cam->vb_alloc_ctx_sg = vb2_dma_sg_init_ctx(cam->dev); @@ -1284,7 +1288,7 @@ static int mcam_setup_vb2(struct mcam_camera *cam) vq->ops = &mcam_vb2_ops; vq->mem_ops = &vb2_vmalloc_memops; vq->buf_struct_size = sizeof(struct mcam_vb_buffer); - vq->io_modes = VB2_MMAP; + vq->io_modes = VB2_MMAP | VB2_READ; cam->dma_setup = mcam_ctlr_dma_vmalloc; cam->frame_complete = mcam_vmalloc_done; #endif @@ -1295,7 +1299,6 @@ static int mcam_setup_vb2(struct mcam_camera *cam) static void mcam_cleanup_vb2(struct mcam_camera *cam) { - vb2_queue_release(&cam->vb_queue); #ifdef MCAM_MODE_DMA_CONTIG if (cam->buffer_mode == B_DMA_contig) vb2_dma_contig_cleanup_ctx(cam->vb_alloc_ctx); @@ -1312,81 +1315,6 @@ static void mcam_cleanup_vb2(struct mcam_camera *cam) * The long list of V4L2 ioctl() operations. */ -static int mcam_vidioc_streamon(struct file *filp, void *priv, - enum v4l2_buf_type type) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_streamon(&cam->vb_queue, type); - mutex_unlock(&cam->s_mutex); - return ret; -} - - -static int mcam_vidioc_streamoff(struct file *filp, void *priv, - enum v4l2_buf_type type) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_streamoff(&cam->vb_queue, type); - mutex_unlock(&cam->s_mutex); - return ret; -} - - -static int mcam_vidioc_reqbufs(struct file *filp, void *priv, - struct v4l2_requestbuffers *req) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_reqbufs(&cam->vb_queue, req); - mutex_unlock(&cam->s_mutex); - return ret; -} - - -static int mcam_vidioc_querybuf(struct file *filp, void *priv, - struct v4l2_buffer *buf) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_querybuf(&cam->vb_queue, buf); - mutex_unlock(&cam->s_mutex); - return ret; -} - -static int mcam_vidioc_qbuf(struct file *filp, void *priv, - struct v4l2_buffer *buf) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_qbuf(&cam->vb_queue, buf); - mutex_unlock(&cam->s_mutex); - return ret; -} - -static int mcam_vidioc_dqbuf(struct file *filp, void *priv, - struct v4l2_buffer *buf) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_dqbuf(&cam->vb_queue, buf, filp->f_flags & O_NONBLOCK); - mutex_unlock(&cam->s_mutex); - return ret; -} - static int mcam_vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { @@ -1425,9 +1353,7 @@ static int mcam_vidioc_try_fmt_vid_cap(struct file *filp, void *priv, f = mcam_find_format(pix->pixelformat); pix->pixelformat = f->pixelformat; v4l2_fill_mbus_format(&mbus_fmt, pix, f->mbus_code); - mutex_lock(&cam->s_mutex); ret = sensor_call(cam, video, try_mbus_fmt, &mbus_fmt); - mutex_unlock(&cam->s_mutex); v4l2_fill_pix_format(pix, &mbus_fmt); switch (f->pixelformat) { case V4L2_PIX_FMT_YUV420: @@ -1469,7 +1395,6 @@ static int mcam_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, * Now we start to change things for real, so let's do it * under lock. */ - mutex_lock(&cam->s_mutex); cam->pix_format = fmt->fmt.pix; cam->mbus_code = f->mbus_code; @@ -1483,7 +1408,6 @@ static int mcam_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, } mcam_set_config_needed(cam, 1); out: - mutex_unlock(&cam->s_mutex); return ret; } @@ -1538,9 +1462,7 @@ static int mcam_vidioc_g_parm(struct file *filp, void *priv, struct mcam_camera *cam = video_drvdata(filp); int ret; - mutex_lock(&cam->s_mutex); ret = sensor_call(cam, video, g_parm, parms); - mutex_unlock(&cam->s_mutex); parms->parm.capture.readbuffers = n_dma_bufs; return ret; } @@ -1551,9 +1473,7 @@ static int mcam_vidioc_s_parm(struct file *filp, void *priv, struct mcam_camera *cam = video_drvdata(filp); int ret; - mutex_lock(&cam->s_mutex); ret = sensor_call(cam, video, s_parm, parms); - mutex_unlock(&cam->s_mutex); parms->parm.capture.readbuffers = n_dma_bufs; return ret; } @@ -1573,9 +1493,7 @@ static int mcam_vidioc_enum_framesizes(struct file *filp, void *priv, if (f->pixelformat != sizes->pixel_format) return -EINVAL; fse.code = f->mbus_code; - mutex_lock(&cam->s_mutex); ret = sensor_call(cam, pad, enum_frame_size, NULL, &fse); - mutex_unlock(&cam->s_mutex); if (ret) return ret; if (fse.min_width == fse.max_width && @@ -1612,9 +1530,7 @@ static int mcam_vidioc_enum_frameintervals(struct file *filp, void *priv, if (f->pixelformat != interval->pixel_format) return -EINVAL; fie.code = f->mbus_code; - mutex_lock(&cam->s_mutex); ret = sensor_call(cam, pad, enum_frame_interval, NULL, &fie); - mutex_unlock(&cam->s_mutex); if (ret) return ret; interval->type = V4L2_FRMIVAL_TYPE_DISCRETE; @@ -1656,12 +1572,12 @@ static const struct v4l2_ioctl_ops mcam_v4l_ioctl_ops = { .vidioc_enum_input = mcam_vidioc_enum_input, .vidioc_g_input = mcam_vidioc_g_input, .vidioc_s_input = mcam_vidioc_s_input, - .vidioc_reqbufs = mcam_vidioc_reqbufs, - .vidioc_querybuf = mcam_vidioc_querybuf, - .vidioc_qbuf = mcam_vidioc_qbuf, - .vidioc_dqbuf = mcam_vidioc_dqbuf, - .vidioc_streamon = mcam_vidioc_streamon, - .vidioc_streamoff = mcam_vidioc_streamoff, + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, .vidioc_g_parm = mcam_vidioc_g_parm, .vidioc_s_parm = mcam_vidioc_s_parm, .vidioc_enum_framesizes = mcam_vidioc_enum_framesizes, @@ -1681,26 +1597,19 @@ static const struct v4l2_ioctl_ops mcam_v4l_ioctl_ops = { static int mcam_v4l_open(struct file *filp) { struct mcam_camera *cam = video_drvdata(filp); - int ret = v4l2_fh_open(filp); - - if (ret) - return ret; + int ret; - cam->frame_state.frames = 0; - cam->frame_state.singles = 0; - cam->frame_state.delivered = 0; mutex_lock(&cam->s_mutex); - if (cam->users == 0) { - ret = mcam_setup_vb2(cam); - if (ret) - goto out; + ret = v4l2_fh_open(filp); + if (ret) + goto out; + if (v4l2_fh_is_singular_file(filp)) { ret = mcam_ctlr_power_up(cam); if (ret) goto out; __mcam_cam_reset(cam); mcam_set_config_needed(cam, 1); } - (cam->users)++; out: mutex_unlock(&cam->s_mutex); if (ret) @@ -1712,15 +1621,12 @@ out: static int mcam_v4l_release(struct file *filp) { struct mcam_camera *cam = video_drvdata(filp); + bool last_open; - cam_dbg(cam, "Release, %d frames, %d singles, %d delivered\n", - cam->frame_state.frames, cam->frame_state.singles, - cam->frame_state.delivered); mutex_lock(&cam->s_mutex); - (cam->users)--; - if (cam->users == 0) { - mcam_ctlr_stop_dma(cam); - mcam_cleanup_vb2(cam); + last_open = v4l2_fh_is_singular_file(filp); + _vb2_fop_release(filp, NULL); + if (last_open) { mcam_disable_mipi(cam); mcam_ctlr_power_down(cam); if (cam->buffer_mode == B_vmalloc && alloc_bufs_at_read) @@ -1728,58 +1634,16 @@ static int mcam_v4l_release(struct file *filp) } mutex_unlock(&cam->s_mutex); - v4l2_fh_release(filp); return 0; } -static ssize_t mcam_v4l_read(struct file *filp, - char __user *buffer, size_t len, loff_t *pos) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_read(&cam->vb_queue, buffer, len, pos, - filp->f_flags & O_NONBLOCK); - mutex_unlock(&cam->s_mutex); - return ret; -} - - - -static unsigned int mcam_v4l_poll(struct file *filp, - struct poll_table_struct *pt) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_poll(&cam->vb_queue, filp, pt); - mutex_unlock(&cam->s_mutex); - return ret; -} - - -static int mcam_v4l_mmap(struct file *filp, struct vm_area_struct *vma) -{ - struct mcam_camera *cam = video_drvdata(filp); - int ret; - - mutex_lock(&cam->s_mutex); - ret = vb2_mmap(&cam->vb_queue, vma); - mutex_unlock(&cam->s_mutex); - return ret; -} - - - static const struct v4l2_file_operations mcam_v4l_fops = { .owner = THIS_MODULE, .open = mcam_v4l_open, .release = mcam_v4l_release, - .read = mcam_v4l_read, - .poll = mcam_v4l_poll, - .mmap = mcam_v4l_mmap, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, .unlocked_ioctl = video_ioctl2, }; @@ -1790,8 +1654,6 @@ static const struct v4l2_file_operations mcam_v4l_fops = { */ static struct video_device mcam_v4l_template = { .name = "mcam", - .tvnorms = V4L2_STD_NTSC_M, - .fops = &mcam_v4l_fops, .ioctl_ops = &mcam_v4l_ioctl_ops, .release = video_device_release_empty, @@ -1950,13 +1812,21 @@ int mccic_register(struct mcam_camera *cam) if (ret) goto out_unregister; + ret = mcam_setup_vb2(cam); + if (ret) + goto out_unregister; + mutex_lock(&cam->s_mutex); cam->vdev = mcam_v4l_template; cam->vdev.v4l2_dev = &cam->v4l2_dev; + cam->vdev.lock = &cam->s_mutex; + cam->vdev.queue = &cam->vb_queue; video_set_drvdata(&cam->vdev, cam); ret = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1); - if (ret) - goto out; + if (ret) { + mutex_unlock(&cam->s_mutex); + goto out_unregister; + } /* * If so requested, try to get our DMA buffers now. @@ -1967,11 +1837,9 @@ int mccic_register(struct mcam_camera *cam) " will try again later."); } -out: - if (ret) - v4l2_ctrl_handler_free(&cam->ctrl_handler); mutex_unlock(&cam->s_mutex); - return ret; + return 0; + out_unregister: v4l2_ctrl_handler_free(&cam->ctrl_handler); v4l2_device_unregister(&cam->v4l2_dev); @@ -1987,11 +1855,11 @@ void mccic_shutdown(struct mcam_camera *cam) * take it down again will wedge the machine, which is frowned * upon. */ - if (cam->users > 0) { + if (!list_empty(&cam->vdev.fh_list)) { cam_warn(cam, "Removing a device with users!\n"); mcam_ctlr_power_down(cam); } - vb2_queue_release(&cam->vb_queue); + mcam_cleanup_vb2(cam); if (cam->buffer_mode == B_vmalloc) mcam_free_dma_bufs(cam); video_unregister_device(&cam->vdev); @@ -2007,7 +1875,7 @@ void mccic_shutdown(struct mcam_camera *cam) void mccic_suspend(struct mcam_camera *cam) { mutex_lock(&cam->s_mutex); - if (cam->users > 0) { + if (!list_empty(&cam->vdev.fh_list)) { enum mcam_state cstate = cam->state; mcam_ctlr_stop_dma(cam); @@ -2022,7 +1890,7 @@ int mccic_resume(struct mcam_camera *cam) int ret = 0; mutex_lock(&cam->s_mutex); - if (cam->users > 0) { + if (!list_empty(&cam->vdev.fh_list)) { ret = mcam_ctlr_power_up(cam); if (ret) { mutex_unlock(&cam->s_mutex); diff --git a/drivers/media/platform/marvell-ccic/mcam-core.h b/drivers/media/platform/marvell-ccic/mcam-core.h index 46bc7151a200..2847e06c5fc8 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.h +++ b/drivers/media/platform/marvell-ccic/mcam-core.h @@ -146,7 +146,6 @@ struct mcam_camera { struct v4l2_ctrl_handler ctrl_handler; enum mcam_state state; unsigned long flags; /* Buffer status, mainly (dev_lock) */ - int users; /* How many open FDs */ struct mcam_frame_state frame_state; /* Frame state counter */ /* -- 2.39.5