mirror of https://gitee.com/openkylin/linux.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 <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski
Mauro Carvalho Chehab
parent
a616898d6d
commit
379fa5d356
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@ -21,7 +21,7 @@
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#include <media/v4l2-common.h>
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#include <media/v4l2-dev.h>
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#include <media/videobuf-dma-contig.h>
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#include <media/videobuf2-dma-contig.h>
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#include <media/soc_camera.h>
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#include <media/soc_mediabus.h>
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@ -62,10 +62,16 @@
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#define MAX_VIDEO_MEM 16
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enum csi_buffer_state {
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CSI_BUF_NEEDS_INIT,
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CSI_BUF_PREPARED,
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};
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struct mx3_camera_buffer {
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/* common v4l buffer stuff -- must be first */
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struct videobuf_buffer vb;
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enum v4l2_mbus_pixelcode code;
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struct vb2_buffer vb;
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enum csi_buffer_state state;
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struct list_head queue;
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/* One descriptot per scatterlist (per frame) */
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struct dma_async_tx_descriptor *txd;
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@ -108,6 +114,9 @@ struct mx3_camera_dev {
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struct list_head capture;
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spinlock_t lock; /* Protects video buffer lists */
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struct mx3_camera_buffer *active;
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struct vb2_alloc_ctx *alloc_ctx;
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enum v4l2_field field;
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int sequence;
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/* IDMAC / dmaengine interface */
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struct idmac_channel *idmac_channel[1]; /* We need one channel */
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@ -130,6 +139,11 @@ static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg)
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__raw_writel(value, mx3->base + reg);
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}
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static struct mx3_camera_buffer *to_mx3_vb(struct vb2_buffer *vb)
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{
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return container_of(vb, struct mx3_camera_buffer, vb);
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}
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/* Called from the IPU IDMAC ISR */
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static void mx3_cam_dma_done(void *arg)
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{
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@ -137,20 +151,20 @@ static void mx3_cam_dma_done(void *arg)
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struct dma_chan *chan = desc->txd.chan;
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struct idmac_channel *ichannel = to_idmac_chan(chan);
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struct mx3_camera_dev *mx3_cam = ichannel->client;
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struct videobuf_buffer *vb;
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dev_dbg(chan->device->dev, "callback cookie %d, active DMA 0x%08x\n",
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desc->txd.cookie, mx3_cam->active ? sg_dma_address(&mx3_cam->active->sg) : 0);
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spin_lock(&mx3_cam->lock);
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if (mx3_cam->active) {
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vb = &mx3_cam->active->vb;
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struct vb2_buffer *vb = &mx3_cam->active->vb;
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struct mx3_camera_buffer *buf = to_mx3_vb(vb);
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list_del_init(&vb->queue);
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vb->state = VIDEOBUF_DONE;
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do_gettimeofday(&vb->ts);
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vb->field_count++;
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wake_up(&vb->done);
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list_del_init(&buf->queue);
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do_gettimeofday(&vb->v4l2_buf.timestamp);
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vb->v4l2_buf.field = mx3_cam->field;
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vb->v4l2_buf.sequence = mx3_cam->sequence++;
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vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
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}
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if (list_empty(&mx3_cam->capture)) {
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@ -165,50 +179,22 @@ static void mx3_cam_dma_done(void *arg)
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}
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mx3_cam->active = list_entry(mx3_cam->capture.next,
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struct mx3_camera_buffer, vb.queue);
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mx3_cam->active->vb.state = VIDEOBUF_ACTIVE;
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struct mx3_camera_buffer, queue);
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spin_unlock(&mx3_cam->lock);
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}
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static void free_buffer(struct videobuf_queue *vq, struct mx3_camera_buffer *buf)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct videobuf_buffer *vb = &buf->vb;
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struct dma_async_tx_descriptor *txd = buf->txd;
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struct idmac_channel *ichan;
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BUG_ON(in_interrupt());
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dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
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vb, vb->baddr, vb->bsize);
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/*
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* This waits until this buffer is out of danger, i.e., until it is no
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* longer in STATE_QUEUED or STATE_ACTIVE
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*/
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videobuf_waiton(vq, vb, 0, 0);
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if (txd) {
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ichan = to_idmac_chan(txd->chan);
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async_tx_ack(txd);
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}
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videobuf_dma_contig_free(vq, vb);
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buf->txd = NULL;
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vb->state = VIDEOBUF_NEEDS_INIT;
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}
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/*
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* Videobuf operations
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*/
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/*
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* Calculate the __buffer__ (not data) size and number of buffers.
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* Called with .vb_lock held
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*/
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static int mx3_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
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unsigned int *size)
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static int mx3_videobuf_setup(struct vb2_queue *vq,
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unsigned int *count, unsigned int *num_planes,
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unsigned long sizes[], void *alloc_ctxs[])
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct mx3_camera_dev *mx3_cam = ici->priv;
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int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
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@ -220,104 +206,66 @@ static int mx3_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
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if (!mx3_cam->idmac_channel[0])
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return -EINVAL;
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*size = bytes_per_line * icd->user_height;
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*num_planes = 1;
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mx3_cam->sequence = 0;
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sizes[0] = bytes_per_line * icd->user_height;
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alloc_ctxs[0] = mx3_cam->alloc_ctx;
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if (!*count)
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*count = 32;
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if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
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*count = MAX_VIDEO_MEM * 1024 * 1024 / *size;
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if (sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024)
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*count = MAX_VIDEO_MEM * 1024 * 1024 / sizes[0];
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return 0;
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}
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/* Called with .vb_lock held */
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static int mx3_videobuf_prepare(struct videobuf_queue *vq,
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struct videobuf_buffer *vb, enum v4l2_field field)
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static int mx3_videobuf_prepare(struct vb2_buffer *vb)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct mx3_camera_dev *mx3_cam = ici->priv;
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struct mx3_camera_buffer *buf =
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container_of(vb, struct mx3_camera_buffer, vb);
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struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
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struct scatterlist *sg;
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struct mx3_camera_buffer *buf;
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size_t new_size;
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int ret;
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int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
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icd->current_fmt->host_fmt);
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if (bytes_per_line < 0)
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return bytes_per_line;
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buf = to_mx3_vb(vb);
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sg = &buf->sg;
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new_size = bytes_per_line * icd->user_height;
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/*
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* I think, in buf_prepare you only have to protect global data,
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* the actual buffer is yours
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*/
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if (buf->code != icd->current_fmt->code ||
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vb->width != icd->user_width ||
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vb->height != icd->user_height ||
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vb->field != field) {
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buf->code = icd->current_fmt->code;
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vb->width = icd->user_width;
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vb->height = icd->user_height;
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vb->field = field;
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if (vb->state != VIDEOBUF_NEEDS_INIT)
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free_buffer(vq, buf);
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if (vb2_plane_size(vb, 0) < new_size) {
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dev_err(icd->dev.parent, "Buffer too small (%lu < %zu)\n",
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vb2_plane_size(vb, 0), new_size);
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return -ENOBUFS;
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}
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if (vb->baddr && vb->bsize < new_size) {
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/* User provided buffer, but it is too small */
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ret = -ENOMEM;
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goto out;
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}
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if (vb->state == VIDEOBUF_NEEDS_INIT) {
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struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
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struct scatterlist *sg = &buf->sg;
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/*
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* The total size of video-buffers that will be allocated / mapped.
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* *size that we calculated in videobuf_setup gets assigned to
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* vb->bsize, and now we use the same calculation to get vb->size.
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*/
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vb->size = new_size;
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/* This actually (allocates and) maps buffers */
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ret = videobuf_iolock(vq, vb, NULL);
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if (ret)
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goto fail;
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/*
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* We will have to configure the IDMAC channel. It has two slots
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* for DMA buffers, we shall enter the first two buffers there,
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* and then submit new buffers in DMA-ready interrupts
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*/
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sg_init_table(sg, 1);
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sg_dma_address(sg) = videobuf_to_dma_contig(vb);
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sg_dma_len(sg) = vb->size;
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if (buf->state == CSI_BUF_NEEDS_INIT) {
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sg_dma_address(sg) = vb2_dma_contig_plane_paddr(vb, 0);
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sg_dma_len(sg) = new_size;
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buf->txd = ichan->dma_chan.device->device_prep_slave_sg(
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&ichan->dma_chan, sg, 1, DMA_FROM_DEVICE,
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DMA_PREP_INTERRUPT);
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if (!buf->txd) {
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ret = -EIO;
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goto fail;
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}
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if (!buf->txd)
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return -EIO;
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buf->txd->callback_param = buf->txd;
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buf->txd->callback = mx3_cam_dma_done;
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vb->state = VIDEOBUF_PREPARED;
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buf->state = CSI_BUF_PREPARED;
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}
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return 0;
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vb2_set_plane_payload(vb, 0, new_size);
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fail:
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free_buffer(vq, buf);
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out:
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return ret;
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return 0;
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}
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static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc)
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@ -333,25 +281,18 @@ static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc)
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}
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}
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/*
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* Called with .vb_lock mutex held and
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* under spinlock_irqsave(&mx3_cam->lock, ...)
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*/
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static void mx3_videobuf_queue(struct videobuf_queue *vq,
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struct videobuf_buffer *vb)
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static void mx3_videobuf_queue(struct vb2_buffer *vb)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct mx3_camera_dev *mx3_cam = ici->priv;
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struct mx3_camera_buffer *buf =
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container_of(vb, struct mx3_camera_buffer, vb);
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struct mx3_camera_buffer *buf = to_mx3_vb(vb);
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struct dma_async_tx_descriptor *txd = buf->txd;
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struct idmac_channel *ichan = to_idmac_chan(txd->chan);
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struct idmac_video_param *video = &ichan->params.video;
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dma_cookie_t cookie;
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u32 fourcc = icd->current_fmt->host_fmt->fourcc;
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BUG_ON(!irqs_disabled());
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unsigned long flags;
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/* This is the configuration of one sg-element */
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video->out_pixel_fmt = fourcc_to_ipu_pix(fourcc);
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@ -383,17 +324,15 @@ static void mx3_videobuf_queue(struct videobuf_queue *vq,
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#ifdef DEBUG
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/* helps to see what DMA actually has written */
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memset((void *)vb->baddr, 0xaa, vb->bsize);
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if (vb2_plane_vaddr(vb, 0))
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memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
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#endif
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list_add_tail(&vb->queue, &mx3_cam->capture);
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spin_lock_irqsave(&mx3_cam->lock, flags);
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list_add_tail(&buf->queue, &mx3_cam->capture);
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if (!mx3_cam->active) {
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if (!mx3_cam->active)
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mx3_cam->active = buf;
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vb->state = VIDEOBUF_ACTIVE;
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} else {
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vb->state = VIDEOBUF_QUEUED;
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}
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spin_unlock_irq(&mx3_cam->lock);
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@ -401,67 +340,87 @@ static void mx3_videobuf_queue(struct videobuf_queue *vq,
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dev_dbg(icd->dev.parent, "Submitted cookie %d DMA 0x%08x\n",
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cookie, sg_dma_address(&buf->sg));
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spin_lock_irq(&mx3_cam->lock);
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if (cookie >= 0)
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return;
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/* Submit error */
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vb->state = VIDEOBUF_PREPARED;
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spin_lock_irq(&mx3_cam->lock);
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list_del_init(&vb->queue);
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/* Submit error */
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list_del_init(&buf->queue);
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if (mx3_cam->active == buf)
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mx3_cam->active = NULL;
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spin_unlock_irqrestore(&mx3_cam->lock, flags);
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vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
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}
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/* Called with .vb_lock held */
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static void mx3_videobuf_release(struct videobuf_queue *vq,
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struct videobuf_buffer *vb)
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static void mx3_videobuf_release(struct vb2_buffer *vb)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct mx3_camera_dev *mx3_cam = ici->priv;
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struct mx3_camera_buffer *buf =
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container_of(vb, struct mx3_camera_buffer, vb);
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struct mx3_camera_buffer *buf = to_mx3_vb(vb);
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struct dma_async_tx_descriptor *txd = buf->txd;
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unsigned long flags;
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dev_dbg(icd->dev.parent,
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"Release%s DMA 0x%08x (state %d), queue %sempty\n",
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"Release%s DMA 0x%08x, queue %sempty\n",
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mx3_cam->active == buf ? " active" : "", sg_dma_address(&buf->sg),
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vb->state, list_empty(&vb->queue) ? "" : "not ");
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spin_lock_irqsave(&mx3_cam->lock, flags);
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if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
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!list_empty(&vb->queue)) {
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vb->state = VIDEOBUF_ERROR;
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list_empty(&buf->queue) ? "" : "not ");
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list_del_init(&vb->queue);
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if (mx3_cam->active == buf)
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mx3_cam->active = NULL;
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spin_lock_irqsave(&mx3_cam->lock, flags);
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if (mx3_cam->active == buf)
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mx3_cam->active = NULL;
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/* Doesn't hurt also if the list is empty */
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list_del_init(&buf->queue);
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buf->state = CSI_BUF_NEEDS_INIT;
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if (txd) {
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buf->txd = NULL;
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if (mx3_cam->idmac_channel[0])
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async_tx_ack(txd);
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}
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spin_unlock_irqrestore(&mx3_cam->lock, flags);
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free_buffer(vq, buf);
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}
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static struct videobuf_queue_ops mx3_videobuf_ops = {
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.buf_setup = mx3_videobuf_setup,
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.buf_prepare = mx3_videobuf_prepare,
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.buf_queue = mx3_videobuf_queue,
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.buf_release = mx3_videobuf_release,
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static int mx3_videobuf_init(struct vb2_buffer *vb)
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{
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struct mx3_camera_buffer *buf = to_mx3_vb(vb);
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/* This is for locking debugging only */
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INIT_LIST_HEAD(&buf->queue);
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sg_init_table(&buf->sg, 1);
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buf->state = CSI_BUF_NEEDS_INIT;
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buf->txd = NULL;
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return 0;
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}
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static struct vb2_ops mx3_videobuf_ops = {
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.queue_setup = mx3_videobuf_setup,
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.buf_prepare = mx3_videobuf_prepare,
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.buf_queue = mx3_videobuf_queue,
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.buf_cleanup = mx3_videobuf_release,
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.buf_init = mx3_videobuf_init,
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.wait_prepare = soc_camera_unlock,
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.wait_finish = soc_camera_lock,
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};
|
||||
|
||||
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;
|
||||
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);
|
||||
|
||||
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);
|
||||
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();
|
||||
|
|
|
|||
Loading…
Reference in New Issue