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Subject[PATCH v11 7/7] [media] cxusb: add raw mode support for Medion MD95700
Date
This adds raw (unprocessed) BT.656 stream capturing support for the analog
part of Medion 95700.
It can be enabled by setting CXUSB_EXTENDEDMODE_CAPTURE_RAW flag in
parm.capture.extendedmode passed to VIDIOC_S_PARM.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
drivers/media/usb/dvb-usb/cxusb-analog.c | 190 +++++++++++++++++++----
drivers/media/usb/dvb-usb/cxusb.h | 4 +
drivers/media/v4l2-core/v4l2-ioctl.c | 3 +-
3 files changed, 163 insertions(+), 34 deletions(-)

diff --git a/drivers/media/usb/dvb-usb/cxusb-analog.c b/drivers/media/usb/dvb-usb/cxusb-analog.c
index 90237869cea8..b2104a20611e 100644
--- a/drivers/media/usb/dvb-usb/cxusb-analog.c
+++ b/drivers/media/usb/dvb-usb/cxusb-analog.c
@@ -44,7 +44,9 @@ static int cxusb_medion_v_queue_setup(struct vb2_queue *q,
{
struct dvb_usb_device *dvbdev = vb2_get_drv_priv(q);
struct cxusb_medion_dev *cxdev = dvbdev->priv;
- unsigned int size = cxdev->width * cxdev->height * 2;
+ unsigned int size = cxdev->raw_mode ?
+ CXUSB_VIDEO_MAX_FRAME_SIZE :
+ cxdev->width * cxdev->height * 2;

if (*num_planes > 0) {
if (*num_planes != 1)
@@ -67,8 +69,13 @@ static int cxusb_medion_v_buf_init(struct vb2_buffer *vb)

cxusb_vprintk(dvbdev, OPS, "buffer init\n");

- if (vb2_plane_size(vb, 0) < cxdev->width * cxdev->height * 2)
- return -ENOMEM;
+ if (cxdev->raw_mode) {
+ if (vb2_plane_size(vb, 0) < CXUSB_VIDEO_MAX_FRAME_SIZE)
+ return -ENOMEM;
+ } else {
+ if (vb2_plane_size(vb, 0) < cxdev->width * cxdev->height * 2)
+ return -ENOMEM;
+ }

cxusb_vprintk(dvbdev, OPS, "buffer OK\n");

@@ -442,6 +449,45 @@ static bool cxusb_medion_copy_field(struct dvb_usb_device *dvbdev,
return true;
}

+static void cxusb_medion_v_process_urb_raw(struct cxusb_medion_dev *cxdev,
+ struct urb *urb)
+{
+ struct dvb_usb_device *dvbdev = cxdev->dvbdev;
+ u8 *buf;
+ struct cxusb_medion_vbuffer *vbuf;
+ int i;
+ unsigned long len;
+
+ if (list_empty(&cxdev->buflist)) {
+ dev_warn(&dvbdev->udev->dev, "no free buffers\n");
+ cxdev->vbuf_sequence++;
+ return;
+ }
+
+ vbuf = list_first_entry(&cxdev->buflist, struct cxusb_medion_vbuffer,
+ list);
+ list_del(&vbuf->list);
+
+ vbuf->vb2.field = V4L2_FIELD_NONE;
+ vbuf->vb2.sequence = cxdev->vbuf_sequence++;
+ vbuf->vb2.vb2_buf.timestamp = ktime_get_ns();
+
+ buf = vb2_plane_vaddr(&vbuf->vb2.vb2_buf, 0);
+
+ for (i = 0, len = 0; i < urb->number_of_packets; i++) {
+ memcpy(buf, urb->transfer_buffer +
+ urb->iso_frame_desc[i].offset,
+ urb->iso_frame_desc[i].actual_length);
+
+ buf += urb->iso_frame_desc[i].actual_length;
+ len += urb->iso_frame_desc[i].actual_length;
+ }
+
+ vb2_set_plane_payload(&vbuf->vb2.vb2_buf, 0, len);
+
+ vb2_buffer_done(&vbuf->vb2.vb2_buf, VB2_BUF_STATE_DONE);
+}
+
static bool cxusb_medion_v_process_auxbuf(struct cxusb_medion_dev *cxdev,
bool reset)
{
@@ -566,22 +612,26 @@ static bool cxusb_medion_v_complete_handle_urb(struct cxusb_medion_dev *cxdev,
len);

if (len > 0) {
- cxusb_vprintk(dvbdev, URB, "appending URB\n");
-
- /*
- * append new data to auxbuf while
- * overwriting old data if necessary
- *
- * if any overwrite happens then we can no
- * longer rely on consistency of the whole
- * data so let's start again the current
- * auxbuf frame assembling process from
- * the beginning
- */
- *auxbuf_reset =
- !cxusb_auxbuf_append_urb(dvbdev,
- &cxdev->auxbuf,
- urb);
+ if (cxdev->raw_mode)
+ cxusb_medion_v_process_urb_raw(cxdev, urb);
+ else {
+ cxusb_vprintk(dvbdev, URB, "appending URB\n");
+
+ /*
+ * append new data to auxbuf while
+ * overwriting old data if necessary
+ *
+ * if any overwrite happens then we can no
+ * longer rely on consistency of the whole
+ * data so let's start again the current
+ * auxbuf frame assembling process from
+ * the beginning
+ */
+ *auxbuf_reset =
+ !cxusb_auxbuf_append_urb(dvbdev,
+ &cxdev->auxbuf,
+ urb);
+ }
}
}

@@ -616,7 +666,8 @@ static void cxusb_medion_v_complete_work(struct work_struct *work)

reschedule = cxusb_medion_v_complete_handle_urb(cxdev, &auxbuf_reset);

- if (cxusb_medion_v_process_auxbuf(cxdev, auxbuf_reset))
+ if (!cxdev->raw_mode && cxusb_medion_v_process_auxbuf(cxdev,
+ auxbuf_reset))
/* reschedule us until auxbuf no longer can produce any frame */
reschedule = true;

@@ -805,9 +856,13 @@ static int cxusb_medion_v_start_streaming(struct vb2_queue *q,
goto ret_unstream_cx;
}

- ret = cxusb_medion_v_ss_auxbuf_alloc(cxdev, &npackets);
- if (ret != 0)
- goto ret_unstream_md;
+ if (cxdev->raw_mode)
+ npackets = CXUSB_VIDEO_MAX_FRAME_PKTS;
+ else {
+ ret = cxusb_medion_v_ss_auxbuf_alloc(cxdev, &npackets);
+ if (ret != 0)
+ goto ret_unstream_md;
+ }

for (i = 0; i < CXUSB_VIDEO_URBS; i++) {
int framen;
@@ -863,9 +918,11 @@ static int cxusb_medion_v_start_streaming(struct vb2_queue *q,
cxdev->nexturb = 0;
cxdev->vbuf_sequence = 0;

- cxdev->vbuf = NULL;
- cxdev->bt656.mode = NEW_FRAME;
- cxdev->bt656.buf = NULL;
+ if (!cxdev->raw_mode) {
+ cxdev->vbuf = NULL;
+ cxdev->bt656.mode = NEW_FRAME;
+ cxdev->bt656.buf = NULL;
+ }

for (i = 0; i < CXUSB_VIDEO_URBS; i++)
if (cxdev->streamurbs[i] != NULL) {
@@ -883,7 +940,8 @@ static int cxusb_medion_v_start_streaming(struct vb2_queue *q,
cxusb_medion_urbs_free(cxdev);

ret_freeab:
- vfree(cxdev->auxbuf.buf);
+ if (!cxdev->raw_mode)
+ vfree(cxdev->auxbuf.buf);

ret_unstream_md:
cxusb_ctrl_msg(dvbdev, CMD_STREAMING_OFF, NULL, 0, NULL, 0);
@@ -930,7 +988,8 @@ static void cxusb_medion_v_stop_streaming(struct vb2_queue *q)
mutex_lock(cxdev->videodev->lock);

/* free transfer buffer and URB */
- vfree(cxdev->auxbuf.buf);
+ if (!cxdev->raw_mode)
+ vfree(cxdev->auxbuf.buf);

cxusb_medion_urbs_free(cxdev);

@@ -1003,9 +1062,11 @@ static int cxusb_medion_g_fmt_vid_cap(struct file *file, void *fh,
f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
f->fmt.pix.field = vb2_start_streaming_called(&cxdev->videoqueue) ?
cxdev->field_order : cxusb_medion_field_order(cxdev);
- f->fmt.pix.bytesperline = cxdev->width * 2;
+ f->fmt.pix.bytesperline = cxdev->raw_mode ? 0 : cxdev->width * 2;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
- f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+ f->fmt.pix.sizeimage =
+ cxdev->raw_mode ? CXUSB_VIDEO_MAX_FRAME_SIZE :
+ f->fmt.pix.bytesperline * f->fmt.pix.height;

return 0;
}
@@ -1043,8 +1104,10 @@ static int cxusb_medion_try_s_fmt_vid_cap(struct file *file,
f->fmt.pix.height = subfmt.format.height;
f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
f->fmt.pix.field = field;
- f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
- f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+ f->fmt.pix.bytesperline = cxdev->raw_mode ? 0 : f->fmt.pix.width * 2;
+ f->fmt.pix.sizeimage =
+ cxdev->raw_mode ? CXUSB_VIDEO_MAX_FRAME_SIZE :
+ f->fmt.pix.bytesperline * f->fmt.pix.height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;

if (isset) {
@@ -1400,6 +1463,67 @@ static int cxusb_medion_querystd(struct file *file, void *fh,
return 0;
}

+static int cxusb_medion_g_s_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *param)
+{
+ v4l2_std_id std;
+
+ if (param->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ param->parm.capture.readbuffers = 2;
+
+ if (cxusb_medion_g_std(file, fh, &std) == 0)
+ v4l2_video_std_frame_period(std,
+ &param->parm.capture.timeperframe);
+
+ return 0;
+}
+
+static int cxusb_medion_g_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *param)
+{
+ struct dvb_usb_device *dvbdev = video_drvdata(file);
+ struct cxusb_medion_dev *cxdev = dvbdev->priv;
+ int ret;
+
+ ret = cxusb_medion_g_s_parm(file, fh, param);
+ if (ret != 0)
+ return ret;
+
+ if (cxdev->raw_mode)
+ param->parm.capture.extendedmode |=
+ CXUSB_EXTENDEDMODE_CAPTURE_RAW;
+
+ return 0;
+}
+
+static int cxusb_medion_s_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *param)
+{
+ struct dvb_usb_device *dvbdev = video_drvdata(file);
+ struct cxusb_medion_dev *cxdev = dvbdev->priv;
+ int ret;
+ bool want_raw;
+
+ ret = cxusb_medion_g_s_parm(file, fh, param);
+ if (ret != 0)
+ return ret;
+
+ want_raw = param->parm.capture.extendedmode &
+ CXUSB_EXTENDEDMODE_CAPTURE_RAW;
+
+ if (want_raw != cxdev->raw_mode) {
+ if (vb2_start_streaming_called(&cxdev->videoqueue) ||
+ cxdev->stop_streaming)
+ return -EBUSY;
+
+ cxdev->raw_mode = want_raw;
+ }
+
+ return 0;
+}
+
static int cxusb_medion_log_status(struct file *file, void *fh)
{
struct dvb_usb_device *dvbdev = video_drvdata(file);
@@ -1419,6 +1543,8 @@ static const struct v4l2_ioctl_ops cxusb_video_ioctl = {
.vidioc_enum_input = cxusb_medion_enum_input,
.vidioc_g_input = cxusb_medion_g_input,
.vidioc_s_input = cxusb_medion_s_input,
+ .vidioc_g_parm = cxusb_medion_g_parm,
+ .vidioc_s_parm = cxusb_medion_s_parm,
.vidioc_g_tuner = cxusb_medion_g_tuner,
.vidioc_s_tuner = cxusb_medion_s_tuner,
.vidioc_g_frequency = cxusb_medion_g_frequency,
diff --git a/drivers/media/usb/dvb-usb/cxusb.h b/drivers/media/usb/dvb-usb/cxusb.h
index 9636f9575e58..35e72f571a2c 100644
--- a/drivers/media/usb/dvb-usb/cxusb.h
+++ b/drivers/media/usb/dvb-usb/cxusb.h
@@ -131,6 +131,7 @@ struct cxusb_medion_dev {
bool stop_streaming;
u32 width, height;
u32 field_order;
+ bool raw_mode;
struct cxusb_medion_auxbuf auxbuf;
v4l2_std_id norm;

@@ -154,6 +155,9 @@ struct cxusb_medion_vbuffer {
struct list_head list;
};

+/* Capture streaming parameters extendedmode field flags */
+#define CXUSB_EXTENDEDMODE_CAPTURE_RAW 1
+
/* defines for "debug" module parameter */
#define CXUSB_DBG_RC BIT(0)
#define CXUSB_DBG_I2C BIT(1)
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index ac87c3e37280..0b9ca5acdd35 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2023,7 +2023,7 @@ static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
if (ret)
return ret;

- /* Note: extendedmode is never used in drivers */
+ /* Note: extendedmode is never used in output drivers */
if (V4L2_TYPE_IS_OUTPUT(p->type)) {
memset(p->parm.output.reserved, 0,
sizeof(p->parm.output.reserved));
@@ -2032,7 +2032,6 @@ static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
} else {
memset(p->parm.capture.reserved, 0,
sizeof(p->parm.capture.reserved));
- p->parm.capture.extendedmode = 0;
p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
}
return ops->vidioc_s_parm(file, fh, p);
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