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media/bcm2835-unicam: Parse pad numbers correctly

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The driver was making big assumptions about the source device
using pad 0 and 1, which doesn't follow for more complex
devices where Unicam's source device may be a sink device for
something else.

Read the pad numbers through media controller, and reference
them appropriately.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2020-09-23 15:16:18 +01:00
committed by Dom Cobley
parent 719ba1ab5c
commit d056e86eb3
1 changed files with 58 additions and 31 deletions
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89
drivers/media/platform/bcm2835/bcm2835-unicam.c
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@@ -383,6 +383,8 @@ struct unicam_node {
int open;
bool streaming;
unsigned int pad_id;
/* Source pad id on the sensor for this node */
unsigned int src_pad_id;
/* Pointer pointing to current v4l2_buffer */
struct unicam_buffer *cur_frm;
/* Pointer pointing to next v4l2_buffer */
@@ -593,7 +595,7 @@ static int __subdev_get_format(struct unicam_device *dev,
{
struct v4l2_subdev_format sd_fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.pad = pad_id
.pad = dev->node[pad_id].src_pad_id,
};
int ret;
@@ -615,7 +617,7 @@ static int __subdev_set_format(struct unicam_device *dev,
{
struct v4l2_subdev_format sd_fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.pad = pad_id
.pad = dev->node[pad_id].src_pad_id,
};
int ret;
@@ -1980,7 +1982,7 @@ static int unicam_enum_framesizes(struct file *file, void *priv,
fse.which = V4L2_SUBDEV_FORMAT_ACTIVE;
fse.index = fsize->index;
fse.pad = node->pad_id;
fse.pad = node->src_pad_id;
ret = v4l2_subdev_call(dev->sensor, pad, enum_frame_size, NULL, &fse);
if (ret)
@@ -2005,6 +2007,7 @@ static int unicam_enum_frameintervals(struct file *file, void *priv,
const struct unicam_fmt *fmt;
struct v4l2_subdev_frame_interval_enum fie = {
.index = fival->index,
.pad = node->src_pad_id,
.width = fival->width,
.height = fival->height,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
@@ -2096,8 +2099,13 @@ static int unicam_enum_dv_timings(struct file *file, void *priv,
{
struct unicam_node *node = video_drvdata(file);
struct unicam_device *dev = node->dev;
int ret;
return v4l2_subdev_call(dev->sensor, pad, enum_dv_timings, timings);
timings->pad = node->src_pad_id;
ret = v4l2_subdev_call(dev->sensor, pad, enum_dv_timings, timings);
timings->pad = node->pad_id;
return ret;
}
static int unicam_dv_timings_cap(struct file *file, void *priv,
@@ -2105,8 +2113,13 @@ static int unicam_dv_timings_cap(struct file *file, void *priv,
{
struct unicam_node *node = video_drvdata(file);
struct unicam_device *dev = node->dev;
int ret;
return v4l2_subdev_call(dev->sensor, pad, dv_timings_cap, cap);
cap->pad = node->src_pad_id;
ret = v4l2_subdev_call(dev->sensor, pad, dv_timings_cap, cap);
cap->pad = node->pad_id;
return ret;
}
static int unicam_subscribe_event(struct v4l2_fh *fh,
@@ -2377,14 +2390,12 @@ static int register_node(struct unicam_device *unicam, struct unicam_node *node,
*/
fmt = get_first_supported_format(unicam);
if (!fmt)
/* No compatible formats */
return -EINVAL;
mbus_fmt.code = fmt->code;
ret = __subdev_set_format(unicam, &mbus_fmt, pad_id);
if (ret)
return -EINVAL;
if (fmt) {
mbus_fmt.code = fmt->code;
ret = __subdev_set_format(unicam, &mbus_fmt, pad_id);
if (ret)
return -EINVAL;
}
}
if (mbus_fmt.field != V4L2_FIELD_NONE) {
/* Interlaced not supported - disable it now. */
@@ -2394,7 +2405,8 @@ static int register_node(struct unicam_device *unicam, struct unicam_node *node,
return -EINVAL;
}
node->v_fmt.fmt.pix.pixelformat = fmt->fourcc ? fmt->fourcc
if (fmt)
node->v_fmt.fmt.pix.pixelformat = fmt->fourcc ? fmt->fourcc
: fmt->repacked_fourcc;
} else {
/* Fix this node format as embedded data. */
@@ -2407,7 +2419,8 @@ static int register_node(struct unicam_device *unicam, struct unicam_node *node,
node->fmt = fmt;
/* Read current subdev format */
unicam_reset_format(node);
if (fmt)
unicam_reset_format(node);
if (v4l2_subdev_has_op(unicam->sensor, video, s_std)) {
v4l2_std_id tvnorms;
@@ -2496,6 +2509,7 @@ static int register_node(struct unicam_device *unicam, struct unicam_node *node,
unicam_err(unicam, "Unable to allocate dummy buffer.\n");
return -ENOMEM;
}
if (pad_id == METADATA_PAD ||
!v4l2_subdev_has_op(unicam->sensor, video, s_std)) {
v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_STD);
@@ -2554,7 +2568,8 @@ static int register_node(struct unicam_device *unicam, struct unicam_node *node,
node->registered = true;
if (pad_id != METADATA_PAD || unicam->sensor_embedded_data) {
ret = media_create_pad_link(&unicam->sensor->entity, pad_id,
ret = media_create_pad_link(&unicam->sensor->entity,
node->src_pad_id,
&node->video_dev.entity, 0,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
@@ -2586,8 +2601,10 @@ static void unregister_nodes(struct unicam_device *unicam)
}
}
static int unicam_probe_complete(struct unicam_device *unicam)
static int unicam_async_complete(struct v4l2_async_notifier *notifier)
{
struct unicam_device *unicam = to_unicam_device(notifier->v4l2_dev);
unsigned int i, source_pads = 0;
int ret;
unicam->v4l2_dev.notify = unicam_notify;
@@ -2596,7 +2613,20 @@ static int unicam_probe_complete(struct unicam_device *unicam)
if (!unicam->sensor_state)
return -ENOMEM;
unicam->sensor_embedded_data = (unicam->sensor->entity.num_pads >= 2);
for (i = 0; i < unicam->sensor->entity.num_pads; i++) {
if (unicam->sensor->entity.pads[i].flags & MEDIA_PAD_FL_SOURCE) {
if (source_pads < MAX_NODES) {
unicam->node[source_pads].src_pad_id = i;
unicam_err(unicam, "source pad %u is index %u\n",
source_pads, i);
}
source_pads++;
}
}
if (!source_pads) {
unicam_err(unicam, "No source pads on sensor.\n");
goto unregister;
}
ret = register_node(unicam, &unicam->node[IMAGE_PAD],
V4L2_BUF_TYPE_VIDEO_CAPTURE, IMAGE_PAD);
@@ -2605,11 +2635,15 @@ static int unicam_probe_complete(struct unicam_device *unicam)
goto unregister;
}
ret = register_node(unicam, &unicam->node[METADATA_PAD],
V4L2_BUF_TYPE_META_CAPTURE, METADATA_PAD);
if (ret) {
unicam_err(unicam, "Unable to register metadata video device.\n");
goto unregister;
if (source_pads >= 2) {
unicam->sensor_embedded_data = true;
ret = register_node(unicam, &unicam->node[METADATA_PAD],
V4L2_BUF_TYPE_META_CAPTURE, METADATA_PAD);
if (ret) {
unicam_err(unicam, "Unable to register metadata video device.\n");
goto unregister;
}
}
ret = v4l2_device_register_ro_subdev_nodes(&unicam->v4l2_dev);
@@ -2632,13 +2666,6 @@ unregister:
return ret;
}
static int unicam_async_complete(struct v4l2_async_notifier *notifier)
{
struct unicam_device *unicam = to_unicam_device(notifier->v4l2_dev);
return unicam_probe_complete(unicam);
}
static const struct v4l2_async_notifier_operations unicam_async_ops = {
.bound = unicam_async_bound,
.complete = unicam_async_complete,
@@ -2747,7 +2774,7 @@ static int of_unicam_connect_subdevs(struct unicam_device *dev)
dev->notifier.ops = &unicam_async_ops;
dev->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
dev->asd.match.fwnode = of_fwnode_handle(sensor_node);
dev->asd.match.fwnode = fwnode_graph_get_remote_endpoint(of_fwnode_handle(ep_node));
ret = v4l2_async_notifier_add_subdev(&dev->notifier, &dev->asd);
if (ret) {
unicam_err(dev, "Error adding subdevice: %d\n", ret);