From: Guennadi Liakhovetski Date: Mon, 21 Feb 2011 10:14:01 +0000 (-0300) Subject: [media] V4L: mx3_camera: convert to videobuf2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=379fa5d;p=linux-beck.git [media] V4L: mx3_camera: convert to videobuf2 Now that soc-camera supports videobuf API v1 and v2, camera-host drivers can be converted to videobuf2 individually. This patch converts the mx3_camera driver. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/mx3_camera.c b/drivers/media/video/mx3_camera.c index c8c6c03a6a62..502e2a40964c 100644 --- a/drivers/media/video/mx3_camera.c +++ b/drivers/media/video/mx3_camera.c @@ -21,7 +21,7 @@ #include #include -#include +#include #include #include @@ -62,10 +62,16 @@ #define MAX_VIDEO_MEM 16 +enum csi_buffer_state { + CSI_BUF_NEEDS_INIT, + CSI_BUF_PREPARED, +}; + struct mx3_camera_buffer { /* common v4l buffer stuff -- must be first */ - struct videobuf_buffer vb; - enum v4l2_mbus_pixelcode code; + struct vb2_buffer vb; + enum csi_buffer_state state; + struct list_head queue; /* One descriptot per scatterlist (per frame) */ struct dma_async_tx_descriptor *txd; @@ -108,6 +114,9 @@ struct mx3_camera_dev { struct list_head capture; spinlock_t lock; /* Protects video buffer lists */ struct mx3_camera_buffer *active; + struct vb2_alloc_ctx *alloc_ctx; + enum v4l2_field field; + int sequence; /* IDMAC / dmaengine interface */ struct idmac_channel *idmac_channel[1]; /* We need one channel */ @@ -130,6 +139,11 @@ static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg) __raw_writel(value, mx3->base + reg); } +static struct mx3_camera_buffer *to_mx3_vb(struct vb2_buffer *vb) +{ + return container_of(vb, struct mx3_camera_buffer, vb); +} + /* Called from the IPU IDMAC ISR */ static void mx3_cam_dma_done(void *arg) { @@ -137,20 +151,20 @@ static void mx3_cam_dma_done(void *arg) struct dma_chan *chan = desc->txd.chan; struct idmac_channel *ichannel = to_idmac_chan(chan); struct mx3_camera_dev *mx3_cam = ichannel->client; - struct videobuf_buffer *vb; dev_dbg(chan->device->dev, "callback cookie %d, active DMA 0x%08x\n", desc->txd.cookie, mx3_cam->active ? sg_dma_address(&mx3_cam->active->sg) : 0); spin_lock(&mx3_cam->lock); if (mx3_cam->active) { - vb = &mx3_cam->active->vb; - - list_del_init(&vb->queue); - vb->state = VIDEOBUF_DONE; - do_gettimeofday(&vb->ts); - vb->field_count++; - wake_up(&vb->done); + struct vb2_buffer *vb = &mx3_cam->active->vb; + struct mx3_camera_buffer *buf = to_mx3_vb(vb); + + list_del_init(&buf->queue); + do_gettimeofday(&vb->v4l2_buf.timestamp); + vb->v4l2_buf.field = mx3_cam->field; + vb->v4l2_buf.sequence = mx3_cam->sequence++; + vb2_buffer_done(vb, VB2_BUF_STATE_DONE); } if (list_empty(&mx3_cam->capture)) { @@ -165,50 +179,22 @@ static void mx3_cam_dma_done(void *arg) } mx3_cam->active = list_entry(mx3_cam->capture.next, - struct mx3_camera_buffer, vb.queue); - mx3_cam->active->vb.state = VIDEOBUF_ACTIVE; + struct mx3_camera_buffer, queue); spin_unlock(&mx3_cam->lock); } -static void free_buffer(struct videobuf_queue *vq, struct mx3_camera_buffer *buf) -{ - struct soc_camera_device *icd = vq->priv_data; - struct videobuf_buffer *vb = &buf->vb; - struct dma_async_tx_descriptor *txd = buf->txd; - struct idmac_channel *ichan; - - BUG_ON(in_interrupt()); - - dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, - vb, vb->baddr, vb->bsize); - - /* - * This waits until this buffer is out of danger, i.e., until it is no - * longer in STATE_QUEUED or STATE_ACTIVE - */ - videobuf_waiton(vq, vb, 0, 0); - if (txd) { - ichan = to_idmac_chan(txd->chan); - async_tx_ack(txd); - } - videobuf_dma_contig_free(vq, vb); - buf->txd = NULL; - - vb->state = VIDEOBUF_NEEDS_INIT; -} - /* * Videobuf operations */ /* * Calculate the __buffer__ (not data) size and number of buffers. - * Called with .vb_lock held */ -static int mx3_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, - unsigned int *size) +static int mx3_videobuf_setup(struct vb2_queue *vq, + unsigned int *count, unsigned int *num_planes, + unsigned long sizes[], void *alloc_ctxs[]) { - struct soc_camera_device *icd = vq->priv_data; + struct soc_camera_device *icd = soc_camera_from_vb2q(vq); struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct mx3_camera_dev *mx3_cam = ici->priv; int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, @@ -220,104 +206,66 @@ static int mx3_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, if (!mx3_cam->idmac_channel[0]) return -EINVAL; - *size = bytes_per_line * icd->user_height; + *num_planes = 1; + + mx3_cam->sequence = 0; + sizes[0] = bytes_per_line * icd->user_height; + alloc_ctxs[0] = mx3_cam->alloc_ctx; if (!*count) *count = 32; - if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) - *count = MAX_VIDEO_MEM * 1024 * 1024 / *size; + if (sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024) + *count = MAX_VIDEO_MEM * 1024 * 1024 / sizes[0]; return 0; } -/* Called with .vb_lock held */ -static int mx3_videobuf_prepare(struct videobuf_queue *vq, - struct videobuf_buffer *vb, enum v4l2_field field) +static int mx3_videobuf_prepare(struct vb2_buffer *vb) { - struct soc_camera_device *icd = vq->priv_data; + struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct mx3_camera_dev *mx3_cam = ici->priv; - struct mx3_camera_buffer *buf = - container_of(vb, struct mx3_camera_buffer, vb); + struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; + struct scatterlist *sg; + struct mx3_camera_buffer *buf; size_t new_size; - int ret; int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, icd->current_fmt->host_fmt); if (bytes_per_line < 0) return bytes_per_line; - new_size = bytes_per_line * icd->user_height; - - /* - * I think, in buf_prepare you only have to protect global data, - * the actual buffer is yours - */ + buf = to_mx3_vb(vb); + sg = &buf->sg; - if (buf->code != icd->current_fmt->code || - vb->width != icd->user_width || - vb->height != icd->user_height || - vb->field != field) { - buf->code = icd->current_fmt->code; - vb->width = icd->user_width; - vb->height = icd->user_height; - vb->field = field; - if (vb->state != VIDEOBUF_NEEDS_INIT) - free_buffer(vq, buf); - } + new_size = bytes_per_line * icd->user_height; - if (vb->baddr && vb->bsize < new_size) { - /* User provided buffer, but it is too small */ - ret = -ENOMEM; - goto out; + if (vb2_plane_size(vb, 0) < new_size) { + dev_err(icd->dev.parent, "Buffer too small (%lu < %zu)\n", + vb2_plane_size(vb, 0), new_size); + return -ENOBUFS; } - if (vb->state == VIDEOBUF_NEEDS_INIT) { - struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; - struct scatterlist *sg = &buf->sg; - - /* - * The total size of video-buffers that will be allocated / mapped. - * *size that we calculated in videobuf_setup gets assigned to - * vb->bsize, and now we use the same calculation to get vb->size. - */ - vb->size = new_size; - - /* This actually (allocates and) maps buffers */ - ret = videobuf_iolock(vq, vb, NULL); - if (ret) - goto fail; - - /* - * We will have to configure the IDMAC channel. It has two slots - * for DMA buffers, we shall enter the first two buffers there, - * and then submit new buffers in DMA-ready interrupts - */ - sg_init_table(sg, 1); - sg_dma_address(sg) = videobuf_to_dma_contig(vb); - sg_dma_len(sg) = vb->size; + if (buf->state == CSI_BUF_NEEDS_INIT) { + sg_dma_address(sg) = vb2_dma_contig_plane_paddr(vb, 0); + sg_dma_len(sg) = new_size; buf->txd = ichan->dma_chan.device->device_prep_slave_sg( &ichan->dma_chan, sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT); - if (!buf->txd) { - ret = -EIO; - goto fail; - } + if (!buf->txd) + return -EIO; buf->txd->callback_param = buf->txd; buf->txd->callback = mx3_cam_dma_done; - vb->state = VIDEOBUF_PREPARED; + buf->state = CSI_BUF_PREPARED; } - return 0; + vb2_set_plane_payload(vb, 0, new_size); -fail: - free_buffer(vq, buf); -out: - return ret; + return 0; } static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc) @@ -333,25 +281,18 @@ static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc) } } -/* - * Called with .vb_lock mutex held and - * under spinlock_irqsave(&mx3_cam->lock, ...) - */ -static void mx3_videobuf_queue(struct videobuf_queue *vq, - struct videobuf_buffer *vb) +static void mx3_videobuf_queue(struct vb2_buffer *vb) { - struct soc_camera_device *icd = vq->priv_data; + struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct mx3_camera_dev *mx3_cam = ici->priv; - struct mx3_camera_buffer *buf = - container_of(vb, struct mx3_camera_buffer, vb); + struct mx3_camera_buffer *buf = to_mx3_vb(vb); struct dma_async_tx_descriptor *txd = buf->txd; struct idmac_channel *ichan = to_idmac_chan(txd->chan); struct idmac_video_param *video = &ichan->params.video; dma_cookie_t cookie; u32 fourcc = icd->current_fmt->host_fmt->fourcc; - - BUG_ON(!irqs_disabled()); + unsigned long flags; /* This is the configuration of one sg-element */ video->out_pixel_fmt = fourcc_to_ipu_pix(fourcc); @@ -383,17 +324,15 @@ static void mx3_videobuf_queue(struct videobuf_queue *vq, #ifdef DEBUG /* helps to see what DMA actually has written */ - memset((void *)vb->baddr, 0xaa, vb->bsize); + if (vb2_plane_vaddr(vb, 0)) + memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0)); #endif - list_add_tail(&vb->queue, &mx3_cam->capture); + spin_lock_irqsave(&mx3_cam->lock, flags); + list_add_tail(&buf->queue, &mx3_cam->capture); - if (!mx3_cam->active) { + if (!mx3_cam->active) mx3_cam->active = buf; - vb->state = VIDEOBUF_ACTIVE; - } else { - vb->state = VIDEOBUF_QUEUED; - } spin_unlock_irq(&mx3_cam->lock); @@ -401,67 +340,87 @@ static void mx3_videobuf_queue(struct videobuf_queue *vq, dev_dbg(icd->dev.parent, "Submitted cookie %d DMA 0x%08x\n", cookie, sg_dma_address(&buf->sg)); - spin_lock_irq(&mx3_cam->lock); - if (cookie >= 0) return; - /* Submit error */ - vb->state = VIDEOBUF_PREPARED; + spin_lock_irq(&mx3_cam->lock); - list_del_init(&vb->queue); + /* Submit error */ + list_del_init(&buf->queue); if (mx3_cam->active == buf) mx3_cam->active = NULL; + + spin_unlock_irqrestore(&mx3_cam->lock, flags); + vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); } -/* Called with .vb_lock held */ -static void mx3_videobuf_release(struct videobuf_queue *vq, - struct videobuf_buffer *vb) +static void mx3_videobuf_release(struct vb2_buffer *vb) { - struct soc_camera_device *icd = vq->priv_data; + struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct mx3_camera_dev *mx3_cam = ici->priv; - struct mx3_camera_buffer *buf = - container_of(vb, struct mx3_camera_buffer, vb); + struct mx3_camera_buffer *buf = to_mx3_vb(vb); + struct dma_async_tx_descriptor *txd = buf->txd; unsigned long flags; dev_dbg(icd->dev.parent, - "Release%s DMA 0x%08x (state %d), queue %sempty\n", + "Release%s DMA 0x%08x, queue %sempty\n", mx3_cam->active == buf ? " active" : "", sg_dma_address(&buf->sg), - vb->state, list_empty(&vb->queue) ? "" : "not "); + list_empty(&buf->queue) ? "" : "not "); + spin_lock_irqsave(&mx3_cam->lock, flags); - if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) && - !list_empty(&vb->queue)) { - vb->state = VIDEOBUF_ERROR; - list_del_init(&vb->queue); - if (mx3_cam->active == buf) - mx3_cam->active = NULL; + if (mx3_cam->active == buf) + mx3_cam->active = NULL; + + /* Doesn't hurt also if the list is empty */ + list_del_init(&buf->queue); + buf->state = CSI_BUF_NEEDS_INIT; + + if (txd) { + buf->txd = NULL; + if (mx3_cam->idmac_channel[0]) + async_tx_ack(txd); } + spin_unlock_irqrestore(&mx3_cam->lock, flags); - free_buffer(vq, buf); } -static struct videobuf_queue_ops mx3_videobuf_ops = { - .buf_setup = mx3_videobuf_setup, - .buf_prepare = mx3_videobuf_prepare, - .buf_queue = mx3_videobuf_queue, - .buf_release = mx3_videobuf_release, +static int mx3_videobuf_init(struct vb2_buffer *vb) +{ + struct mx3_camera_buffer *buf = to_mx3_vb(vb); + /* This is for locking debugging only */ + INIT_LIST_HEAD(&buf->queue); + sg_init_table(&buf->sg, 1); + + buf->state = CSI_BUF_NEEDS_INIT; + buf->txd = NULL; + + return 0; +} + +static struct vb2_ops mx3_videobuf_ops = { + .queue_setup = mx3_videobuf_setup, + .buf_prepare = mx3_videobuf_prepare, + .buf_queue = mx3_videobuf_queue, + .buf_cleanup = mx3_videobuf_release, + .buf_init = mx3_videobuf_init, + .wait_prepare = soc_camera_unlock, + .wait_finish = soc_camera_lock, }; -static void mx3_camera_init_videobuf(struct videobuf_queue *q, +static int mx3_camera_init_videobuf(struct vb2_queue *q, struct soc_camera_device *icd) { - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - - videobuf_queue_dma_contig_init(q, &mx3_videobuf_ops, icd->dev.parent, - &mx3_cam->lock, - V4L2_BUF_TYPE_VIDEO_CAPTURE, - V4L2_FIELD_NONE, - sizeof(struct mx3_camera_buffer), icd, - &icd->video_lock); + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_USERPTR; + q->drv_priv = icd; + q->ops = &mx3_videobuf_ops; + q->mem_ops = &vb2_dma_contig_memops; + q->buf_struct_size = sizeof(struct mx3_camera_buffer); + + return vb2_queue_init(q); } /* First part of ipu_csi_init_interface() */ @@ -556,18 +515,6 @@ static void mx3_camera_remove_device(struct soc_camera_device *icd) icd->devnum); } -static bool channel_change_requested(struct soc_camera_device *icd, - struct v4l2_rect *rect) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; - - /* Do buffers have to be re-allocated or channel re-configured? */ - return ichan && rect->width * rect->height > - icd->user_width * icd->user_height; -} - static int test_platform_param(struct mx3_camera_dev *mx3_cam, unsigned char buswidth, unsigned long *flags) { @@ -808,18 +755,6 @@ static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam) struct dma_chan_request rq = {.mx3_cam = mx3_cam, .id = IDMAC_IC_7}; - if (*ichan) { - struct videobuf_buffer *vb, *_vb; - dma_release_channel(&(*ichan)->dma_chan); - *ichan = NULL; - mx3_cam->active = NULL; - list_for_each_entry_safe(vb, _vb, &mx3_cam->capture, queue) { - list_del_init(&vb->queue); - vb->state = VIDEOBUF_ERROR; - wake_up(&vb->done); - } - } - dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); dma_cap_set(DMA_PRIVATE, mask); @@ -879,19 +814,8 @@ static int mx3_camera_set_crop(struct soc_camera_device *icd, return ret; } - if (mf.width != icd->user_width || mf.height != icd->user_height) { - /* - * We now know pixel formats and can decide upon DMA-channel(s) - * So far only direct camera-to-memory is supported - */ - if (channel_change_requested(icd, rect)) { - ret = acquire_dma_channel(mx3_cam); - if (ret < 0) - return ret; - } - + if (mf.width != icd->user_width || mf.height != icd->user_height) configure_geometry(mx3_cam, mf.width, mf.height, mf.code); - } dev_dbg(icd->dev.parent, "Sensor cropped %dx%d\n", mf.width, mf.height); @@ -923,10 +847,6 @@ static int mx3_camera_set_fmt(struct soc_camera_device *icd, stride_align(&pix->width); dev_dbg(icd->dev.parent, "Set format %dx%d\n", pix->width, pix->height); - ret = acquire_dma_channel(mx3_cam); - if (ret < 0) - return ret; - /* * Might have to perform a complete interface initialisation like in * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider @@ -948,9 +868,16 @@ static int mx3_camera_set_fmt(struct soc_camera_device *icd, if (mf.code != xlate->code) return -EINVAL; + if (!mx3_cam->idmac_channel[0]) { + ret = acquire_dma_channel(mx3_cam); + if (ret < 0) + return ret; + } + pix->width = mf.width; pix->height = mf.height; pix->field = mf.field; + mx3_cam->field = mf.field; pix->colorspace = mf.colorspace; icd->current_fmt = xlate; @@ -1033,7 +960,7 @@ static unsigned int mx3_camera_poll(struct file *file, poll_table *pt) { struct soc_camera_device *icd = file->private_data; - return videobuf_poll_stream(file, &icd->vb_vidq, pt); + return vb2_poll(&icd->vb2_vidq, file, pt); } static int mx3_camera_querycap(struct soc_camera_host *ici, @@ -1207,7 +1134,7 @@ static struct soc_camera_host_ops mx3_soc_camera_host_ops = { .set_fmt = mx3_camera_set_fmt, .try_fmt = mx3_camera_try_fmt, .get_formats = mx3_camera_get_formats, - .init_videobuf = mx3_camera_init_videobuf, + .init_videobuf2 = mx3_camera_init_videobuf, .reqbufs = mx3_camera_reqbufs, .poll = mx3_camera_poll, .querycap = mx3_camera_querycap, @@ -1283,6 +1210,12 @@ static int __devinit mx3_camera_probe(struct platform_device *pdev) soc_host->v4l2_dev.dev = &pdev->dev; soc_host->nr = pdev->id; + mx3_cam->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); + if (IS_ERR(mx3_cam->alloc_ctx)) { + err = PTR_ERR(mx3_cam->alloc_ctx); + goto eallocctx; + } + err = soc_camera_host_register(soc_host); if (err) goto ecamhostreg; @@ -1293,6 +1226,8 @@ static int __devinit mx3_camera_probe(struct platform_device *pdev) return 0; ecamhostreg: + vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx); +eallocctx: iounmap(base); eioremap: clk_put(mx3_cam->clk); @@ -1322,6 +1257,8 @@ static int __devexit mx3_camera_remove(struct platform_device *pdev) if (WARN_ON(mx3_cam->idmac_channel[0])) dma_release_channel(&mx3_cam->idmac_channel[0]->dma_chan); + vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx); + vfree(mx3_cam); dmaengine_put();