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@xxxxxx>
---
This one is also on git.linuxtv.org already.
drivers/media/video/mx3_camera.c | 342 ++++++++++++++++----------------------
1 files changed, 143 insertions(+), 199 deletions(-)
diff --git a/drivers/media/video/mx3_camera.c b/drivers/media/video/mx3_camera.c
index b9cb4a4..d61ff0d 100644
--- a/drivers/media/video/mx3_camera.c
+++ b/drivers/media/video/mx3_camera.c
@@ -21,7 +21,7 @@
#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
-#include <media/videobuf-dma-contig.h>
+#include <media/videobuf2-dma-contig.h>
#include <media/soc_camera.h>
#include <media/soc_mediabus.h>
@@ -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)) {
@@ -165,38 +179,10 @@ 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
*/
@@ -205,10 +191,11 @@ static void free_buffer(struct videobuf_queue *vq, struct mx3_camera_buffer *buf
* 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 +207,68 @@ 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;
+ buf = to_mx3_vb(vb);
+ sg = &buf->sg;
- /*
- * I think, in buf_prepare you only have to protect global data,
- * the actual buffer is yours
- */
-
- 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) = (dma_addr_t)icd->vb2_vidq.mem_ops->cookie(
+ vb->planes[0].mem_priv);
+ 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)
@@ -338,24 +289,20 @@ static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc)
}
/*
- * Called with .vb_lock mutex held and
- * under spinlock_irqsave(&mx3_cam->lock, ...)
+ * Called with .vb_lock mutex held
*/
-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);
@@ -365,17 +312,15 @@ 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);
@@ -383,67 +328,88 @@ 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() */
@@ -538,18 +504,6 @@ 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)
{
@@ -772,18 +726,6 @@ 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);
@@ -843,19 +785,8 @@ 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);
- }
dev_dbg(icd->dev.parent, "Sensor cropped %dx%d\n",
mf.width, mf.height);
@@ -887,10 +818,6 @@ 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
@@ -912,9 +839,16 @@ 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;
@@ -991,7 +925,7 @@ 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,
@@ -1165,7 +1099,7 @@ 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,
@@ -1241,6 +1175,12 @@ 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;
@@ -1251,6 +1191,8 @@ 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);
@@ -1280,6 +1222,8 @@ 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();
--
1.7.2.3
--
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