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device: Always use a pair of driver and subdev names to find the device (MR 9)

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Otherwise Megapixels fails to find the correct device on systems where
there are multiple media devices handled by the same driver, like imx8mq.
This commit is contained in:
Sebastian Krzyszkowiak
2022-01-21 15:03:32 +01:00
committed by Martijn Braam
parent e75eb375de
commit 1dc3d3d455
4 changed files with 58 additions and 57 deletions
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86
tools/camera_test.c
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@@ -19,22 +19,18 @@ get_time()
int
main(int argc, char *argv[])
{
if (argc != 2 && argc != 3) {
printf("Usage: %s <media_device_name> [<sub_device_name>]\n",
argv[0]);
if (argc != 3) {
printf("Usage: %s <media_device_name> <sub_device_name>\n", argv[0]);
return 1;
}
char *video_name = argv[1];
char *subdev_name = NULL;
if (argc == 3) {
subdev_name = argv[2];
}
char *subdev_name = argv[2];
double find_start = get_time();
// First find the device
MPDevice *device = mp_device_find(video_name);
MPDevice *device = mp_device_find(video_name, subdev_name);
if (!device) {
printf("Device not found\n");
return 1;
@@ -73,50 +69,46 @@ main(int argc, char *argv[])
}
int subdev_fd = -1;
if (subdev_name) {
const struct media_v2_entity *entity =
mp_device_find_entity(device, subdev_name);
if (!entity) {
printf("Unable to find sub-device\n");
return 1;
const struct media_v2_entity *entity =
mp_device_find_entity(device, subdev_name);
if (!entity) {
printf("Unable to find sub-device\n");
return 1;
}
const struct media_v2_pad *source_pad =
mp_device_get_pad_from_entity(device, entity->id);
const struct media_v2_pad *sink_pad =
mp_device_get_pad_from_entity(device, video_entity_id);
// Disable other links
const struct media_v2_entity *entities = mp_device_get_entities(device);
for (int i = 0; i < mp_device_get_num_entities(device); ++i) {
if (entities[i].id != video_entity_id &&
entities[i].id != entity->id) {
const struct media_v2_pad *pad =
mp_device_get_pad_from_entity(device,
entities[i].id);
mp_device_setup_link(device, pad->id, sink_pad->id, false);
}
}
const struct media_v2_pad *source_pad =
mp_device_get_pad_from_entity(device, entity->id);
const struct media_v2_pad *sink_pad =
mp_device_get_pad_from_entity(device, video_entity_id);
// Then enable ours
mp_device_setup_link(device, source_pad->id, sink_pad->id, true);
// Disable other links
const struct media_v2_entity *entities =
mp_device_get_entities(device);
for (int i = 0; i < mp_device_get_num_entities(device); ++i) {
if (entities[i].id != video_entity_id &&
entities[i].id != entity->id) {
const struct media_v2_pad *pad =
mp_device_get_pad_from_entity(
device, entities[i].id);
mp_device_setup_link(
device, pad->id, sink_pad->id, false);
}
}
const struct media_v2_interface *iface =
mp_device_find_entity_interface(device, entity->id);
// Then enable ours
mp_device_setup_link(device, source_pad->id, sink_pad->id, true);
char buf[256];
if (!mp_find_device_path(iface->devnode, buf, 256)) {
printf("Unable to find sub-device path\n");
return 1;
}
const struct media_v2_interface *iface =
mp_device_find_entity_interface(device, entity->id);
char buf[256];
if (!mp_find_device_path(iface->devnode, buf, 256)) {
printf("Unable to find sub-device path\n");
return 1;
}
subdev_fd = open(buf, O_RDWR);
if (subdev_fd == -1) {
printf("Unable to open sub-device\n");
return 1;
}
subdev_fd = open(buf, O_RDWR);
if (subdev_fd == -1) {
printf("Unable to open sub-device\n");
return 1;
}
double open_end = get_time();