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path: root/drivers/media/usb/uvc/uvc_driver.c
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Diffstat (limited to 'drivers/media/usb/uvc/uvc_driver.c')
-rw-r--r--drivers/media/usb/uvc/uvc_driver.c177
1 files changed, 156 insertions, 21 deletions
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 302e284a95eb..04bf35063c4c 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -168,6 +168,26 @@ static struct uvc_format_desc uvc_fmts[] = {
.guid = UVC_GUID_FORMAT_RW10,
.fcc = V4L2_PIX_FMT_SRGGB10P,
},
+ {
+ .name = "Bayer 16-bit (SBGGR16)",
+ .guid = UVC_GUID_FORMAT_BG16,
+ .fcc = V4L2_PIX_FMT_SBGGR16,
+ },
+ {
+ .name = "Bayer 16-bit (SGBRG16)",
+ .guid = UVC_GUID_FORMAT_GB16,
+ .fcc = V4L2_PIX_FMT_SGBRG16,
+ },
+ {
+ .name = "Bayer 16-bit (SRGGB16)",
+ .guid = UVC_GUID_FORMAT_RG16,
+ .fcc = V4L2_PIX_FMT_SRGGB16,
+ },
+ {
+ .name = "Bayer 16-bit (SGRBG16)",
+ .guid = UVC_GUID_FORMAT_GR16,
+ .fcc = V4L2_PIX_FMT_SGRBG16,
+ },
};
/* ------------------------------------------------------------------------
@@ -1309,7 +1329,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
switch (UVC_ENTITY_TYPE(entity)) {
case UVC_VC_EXTENSION_UNIT:
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" <- XU %d", entity->id);
+ printk(KERN_CONT " <- XU %d", entity->id);
if (entity->bNrInPins != 1) {
uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
@@ -1321,7 +1341,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
case UVC_VC_PROCESSING_UNIT:
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" <- PU %d", entity->id);
+ printk(KERN_CONT " <- PU %d", entity->id);
if (chain->processing != NULL) {
uvc_trace(UVC_TRACE_DESCR, "Found multiple "
@@ -1334,7 +1354,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
case UVC_VC_SELECTOR_UNIT:
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" <- SU %d", entity->id);
+ printk(KERN_CONT " <- SU %d", entity->id);
/* Single-input selector units are ignored. */
if (entity->bNrInPins == 1)
@@ -1353,7 +1373,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
case UVC_ITT_CAMERA:
case UVC_ITT_MEDIA_TRANSPORT_INPUT:
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" <- IT %d\n", entity->id);
+ printk(KERN_CONT " <- IT %d\n", entity->id);
break;
@@ -1361,17 +1381,17 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
case UVC_OTT_DISPLAY:
case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" OT %d", entity->id);
+ printk(KERN_CONT " OT %d", entity->id);
break;
case UVC_TT_STREAMING:
if (UVC_ENTITY_IS_ITERM(entity)) {
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" <- IT %d\n", entity->id);
+ printk(KERN_CONT " <- IT %d\n", entity->id);
} else {
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" OT %d", entity->id);
+ printk(KERN_CONT " OT %d", entity->id);
}
break;
@@ -1416,9 +1436,9 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
list_add_tail(&forward->chain, &chain->entities);
if (uvc_trace_param & UVC_TRACE_PROBE) {
if (!found)
- printk(" (->");
+ printk(KERN_CONT " (->");
- printk(" XU %d", forward->id);
+ printk(KERN_CONT " XU %d", forward->id);
found = 1;
}
break;
@@ -1436,16 +1456,16 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
list_add_tail(&forward->chain, &chain->entities);
if (uvc_trace_param & UVC_TRACE_PROBE) {
if (!found)
- printk(" (->");
+ printk(KERN_CONT " (->");
- printk(" OT %d", forward->id);
+ printk(KERN_CONT " OT %d", forward->id);
found = 1;
}
break;
}
}
if (found)
- printk(")");
+ printk(KERN_CONT ")");
return 0;
}
@@ -1471,7 +1491,7 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
}
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" <- IT");
+ printk(KERN_CONT " <- IT");
chain->selector = entity;
for (i = 0; i < entity->bNrInPins; ++i) {
@@ -1485,14 +1505,14 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
}
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(" %d", term->id);
+ printk(KERN_CONT " %d", term->id);
list_add_tail(&term->chain, &chain->entities);
uvc_scan_chain_forward(chain, term, entity);
}
if (uvc_trace_param & UVC_TRACE_PROBE)
- printk("\n");
+ printk(KERN_CONT "\n");
id = 0;
break;
@@ -1595,6 +1615,114 @@ static const char *uvc_print_chain(struct uvc_video_chain *chain)
return buffer;
}
+static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
+{
+ struct uvc_video_chain *chain;
+
+ chain = kzalloc(sizeof(*chain), GFP_KERNEL);
+ if (chain == NULL)
+ return NULL;
+
+ INIT_LIST_HEAD(&chain->entities);
+ mutex_init(&chain->ctrl_mutex);
+ chain->dev = dev;
+ v4l2_prio_init(&chain->prio);
+
+ return chain;
+}
+
+/*
+ * Fallback heuristic for devices that don't connect units and terminals in a
+ * valid chain.
+ *
+ * Some devices have invalid baSourceID references, causing uvc_scan_chain()
+ * to fail, but if we just take the entities we can find and put them together
+ * in the most sensible chain we can think of, turns out they do work anyway.
+ * Note: This heuristic assumes there is a single chain.
+ *
+ * At the time of writing, devices known to have such a broken chain are
+ * - Acer Integrated Camera (5986:055a)
+ * - Realtek rtl157a7 (0bda:57a7)
+ */
+static int uvc_scan_fallback(struct uvc_device *dev)
+{
+ struct uvc_video_chain *chain;
+ struct uvc_entity *iterm = NULL;
+ struct uvc_entity *oterm = NULL;
+ struct uvc_entity *entity;
+ struct uvc_entity *prev;
+
+ /*
+ * Start by locating the input and output terminals. We only support
+ * devices with exactly one of each for now.
+ */
+ list_for_each_entry(entity, &dev->entities, list) {
+ if (UVC_ENTITY_IS_ITERM(entity)) {
+ if (iterm)
+ return -EINVAL;
+ iterm = entity;
+ }
+
+ if (UVC_ENTITY_IS_OTERM(entity)) {
+ if (oterm)
+ return -EINVAL;
+ oterm = entity;
+ }
+ }
+
+ if (iterm == NULL || oterm == NULL)
+ return -EINVAL;
+
+ /* Allocate the chain and fill it. */
+ chain = uvc_alloc_chain(dev);
+ if (chain == NULL)
+ return -ENOMEM;
+
+ if (uvc_scan_chain_entity(chain, oterm) < 0)
+ goto error;
+
+ prev = oterm;
+
+ /*
+ * Add all Processing and Extension Units with two pads. The order
+ * doesn't matter much, use reverse list traversal to connect units in
+ * UVC descriptor order as we build the chain from output to input. This
+ * leads to units appearing in the order meant by the manufacturer for
+ * the cameras known to require this heuristic.
+ */
+ list_for_each_entry_reverse(entity, &dev->entities, list) {
+ if (entity->type != UVC_VC_PROCESSING_UNIT &&
+ entity->type != UVC_VC_EXTENSION_UNIT)
+ continue;
+
+ if (entity->num_pads != 2)
+ continue;
+
+ if (uvc_scan_chain_entity(chain, entity) < 0)
+ goto error;
+
+ prev->baSourceID[0] = entity->id;
+ prev = entity;
+ }
+
+ if (uvc_scan_chain_entity(chain, iterm) < 0)
+ goto error;
+
+ prev->baSourceID[0] = iterm->id;
+
+ list_add_tail(&chain->list, &dev->chains);
+
+ uvc_trace(UVC_TRACE_PROBE,
+ "Found a video chain by fallback heuristic (%s).\n",
+ uvc_print_chain(chain));
+
+ return 0;
+
+error:
+ kfree(chain);
+ return -EINVAL;
+}
+
/*
* Scan the device for video chains and register video devices.
*
@@ -1617,15 +1745,10 @@ static int uvc_scan_device(struct uvc_device *dev)
if (term->chain.next || term->chain.prev)
continue;
- chain = kzalloc(sizeof(*chain), GFP_KERNEL);
+ chain = uvc_alloc_chain(dev);
if (chain == NULL)
return -ENOMEM;
- INIT_LIST_HEAD(&chain->entities);
- mutex_init(&chain->ctrl_mutex);
- chain->dev = dev;
- v4l2_prio_init(&chain->prio);
-
term->flags |= UVC_ENTITY_FLAG_DEFAULT;
if (uvc_scan_chain(chain, term) < 0) {
@@ -1639,6 +1762,9 @@ static int uvc_scan_device(struct uvc_device *dev)
list_add_tail(&chain->list, &dev->chains);
}
+ if (list_empty(&dev->chains))
+ uvc_scan_fallback(dev);
+
if (list_empty(&dev->chains)) {
uvc_printk(KERN_INFO, "No valid video chain found.\n");
return -1;
@@ -2564,6 +2690,15 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_FORCE_Y8 },
+ /* Oculus VR Rift Sensor */
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x2833,
+ .idProduct = 0x0211,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_FORCE_Y8 },
/* Generic USB Video Class */
{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 03:49:04 +0300