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[35.228.153.64]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-58527c6b014sm123872e87.43.2025.09.26.06.11.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Sep 2025 06:11:34 -0700 (PDT) From: Ricardo Ribalda Date: Fri, 26 Sep 2025 13:11:32 +0000 Subject: [PATCH v3 08/12] media: uvcvideo: Add support for V4L2_CID_CAMERA_ORIENTATION Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250926-uvc-orientation-v3-8-6dc2fa5b4220@chromium.org> References: <20250926-uvc-orientation-v3-0-6dc2fa5b4220@chromium.org> In-Reply-To: <20250926-uvc-orientation-v3-0-6dc2fa5b4220@chromium.org> To: Hans de Goede , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus , Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski , "Rafael J. Wysocki" , Len Brown , Robert Moore , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, Ricardo Ribalda X-Mailer: b4 0.14.2 Fetch the orientation from the fwnode and map it into a control. The uvc driver does not use the media controller, so we need to create a software entity, like we previously did with the external gpio. We do not re-purpose the external gpio entity because its is planned to remove it. We need to make uvc_alloc_entity non static. Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/Kconfig | 1 + drivers/media/usb/uvc/Makefile | 3 +- drivers/media/usb/uvc/uvc_ctrl.c | 21 ++++++++++ drivers/media/usb/uvc/uvc_driver.c | 22 +++++++---- drivers/media/usb/uvc/uvc_entity.c | 1 + drivers/media/usb/uvc/uvc_swentity.c | 76 ++++++++++++++++++++++++++++++++++++ drivers/media/usb/uvc/uvcvideo.h | 17 ++++++++ include/linux/usb/uvc.h | 3 ++ 8 files changed, 135 insertions(+), 9 deletions(-) diff --git a/drivers/media/usb/uvc/Kconfig b/drivers/media/usb/uvc/Kconfig index 579532272fd6d7a8ef65c1a3a892b723f40e584e..65f9cf81c8f434c50910db0ae94788af182eb4c4 100644 --- a/drivers/media/usb/uvc/Kconfig +++ b/drivers/media/usb/uvc/Kconfig @@ -4,6 +4,7 @@ config USB_VIDEO_CLASS depends on VIDEO_DEV select VIDEOBUF2_VMALLOC select UVC_COMMON + select V4L2_FWNODE help Support for the USB Video Class (UVC). Currently only video input devices, such as webcams, are supported. diff --git a/drivers/media/usb/uvc/Makefile b/drivers/media/usb/uvc/Makefile index 4f9eee4f81ab6436a8b90324a688a149b2c3bcd1..b4398177c4bb0a9bd49dfd4ca7f2e933b4a1d7df 100644 --- a/drivers/media/usb/uvc/Makefile +++ b/drivers/media/usb/uvc/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 uvcvideo-objs := uvc_driver.o uvc_queue.o uvc_v4l2.o uvc_video.o uvc_ctrl.o \ - uvc_status.o uvc_isight.o uvc_debugfs.o uvc_metadata.o + uvc_status.o uvc_isight.o uvc_debugfs.o uvc_metadata.o \ + uvc_swentity.o ifeq ($(CONFIG_MEDIA_CONTROLLER),y) uvcvideo-objs += uvc_entity.o endif diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index a869257e9b7c07eaa7d725d107bd1cb57d3c7377..aa9de84de9236540c46ee78fb8458873d503786e 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -385,6 +385,13 @@ static const struct uvc_control_info uvc_ctrls[] = { | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, + { + .entity = UVC_GUID_SWENTITY, + .selector = 0, + .index = 0, + .size = 1, + .flags = UVC_CTRL_FLAG_GET_CUR, + }, }; static const u32 uvc_control_classes[] = { @@ -1009,6 +1016,17 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = { .menu_mask = BIT(V4L2_COLORFX_VIVID) | BIT(V4L2_COLORFX_NONE), }, + { + .id = V4L2_CID_CAMERA_ORIENTATION, + .entity = UVC_GUID_SWENTITY, + .selector = 0, + .size = 8, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_MENU, + .data_type = UVC_CTRL_DATA_TYPE_ENUM, + .menu_mask = GENMASK(V4L2_CAMERA_ORIENTATION_EXTERNAL, + V4L2_CAMERA_ORIENTATION_FRONT), + }, }; /* ------------------------------------------------------------------------ @@ -3281,6 +3299,9 @@ static int uvc_ctrl_init_chain(struct uvc_video_chain *chain) } else if (UVC_ENTITY_TYPE(entity) == UVC_EXT_GPIO_UNIT) { bmControls = entity->gpio.bmControls; bControlSize = entity->gpio.bControlSize; + } else if (UVC_ENTITY_TYPE(entity) == UVC_SWENTITY_UNIT) { + bmControls = entity->swentity.bmControls; + bControlSize = entity->swentity.bControlSize; } /* Remove bogus/blacklisted controls */ diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index fa61f1d0ea2c3d52c560b2f0834e52ca75c4227e..91edc7703b1987d8dfd552999edbdbf1b4653f3f 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -794,9 +794,9 @@ static const u8 uvc_media_transport_input_guid[16] = UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; -static struct uvc_entity *uvc_alloc_new_entity(struct uvc_device *dev, u16 type, - u16 id, unsigned int num_pads, - unsigned int extra_size) +struct uvc_entity *uvc_alloc_new_entity(struct uvc_device *dev, u16 type, + u16 id, unsigned int num_pads, + unsigned int extra_size) { struct uvc_entity *entity; unsigned int num_inputs; @@ -1887,12 +1887,14 @@ static int uvc_scan_device(struct uvc_device *dev) return -ENODEV; } - /* Add GPIO entity to the first chain. */ - if (dev->gpio_unit) { - chain = list_first_entry(&dev->chains, - struct uvc_video_chain, list); + /* Add virtual entities to the first chain. */ + chain = list_first_entry(&dev->chains, struct uvc_video_chain, list); + + if (dev->gpio_unit) list_add_tail(&dev->gpio_unit->chain, &chain->entities); - } + + if (dev->swentity_unit) + list_add_tail(&dev->swentity_unit->chain, &chain->entities); return 0; } @@ -2244,6 +2246,10 @@ static int uvc_probe(struct usb_interface *intf, if (ret < 0) goto error; + ret = uvc_swentity_init(dev); + if (ret < 0) + goto error; + dev_info(&dev->intf->dev, "Found UVC %u.%02x device %s (%04x:%04x)\n", dev->uvc_version >> 8, dev->uvc_version & 0xff, udev->product ? udev->product : "", diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c index ee1007add243036f68b7014ca621813e461fa73d..d5125fdd829a7e11f7083762531f811069e0e43f 100644 --- a/drivers/media/usb/uvc/uvc_entity.c +++ b/drivers/media/usb/uvc/uvc_entity.c @@ -86,6 +86,7 @@ static int uvc_mc_init_entity(struct uvc_video_chain *chain, case UVC_VC_PROCESSING_UNIT: case UVC_VC_EXTENSION_UNIT: case UVC_EXT_GPIO_UNIT: + case UVC_SWENTITY_UNIT: /* For lack of a better option. */ function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; break; diff --git a/drivers/media/usb/uvc/uvc_swentity.c b/drivers/media/usb/uvc/uvc_swentity.c new file mode 100644 index 0000000000000000000000000000000000000000..eefc5d08e370515181f74590f2f38189770b01b2 --- /dev/null +++ b/drivers/media/usb/uvc/uvc_swentity.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * uvc_swentity.c -- USB Video Class driver + * + * Copyright 2025 Google LLC + */ + +#include +#include + +#include + +#include "uvcvideo.h" + +static int uvc_swentity_get_cur(struct uvc_device *dev, struct uvc_entity *entity, + u8 cs, void *data, u16 size) +{ + if (size < 1) + return -EINVAL; + + switch (entity->swentity.props.orientation) { + case V4L2_FWNODE_ORIENTATION_FRONT: + *(u8 *)data = V4L2_CAMERA_ORIENTATION_FRONT; + break; + case V4L2_FWNODE_ORIENTATION_BACK: + *(u8 *)data = V4L2_CAMERA_ORIENTATION_BACK; + break; + default: + *(u8 *)data = V4L2_CAMERA_ORIENTATION_EXTERNAL; + } + + return 0; +} + +static int uvc_swentity_get_info(struct uvc_device *dev, + struct uvc_entity *entity, u8 cs, u8 *caps) +{ + *caps = UVC_CONTROL_CAP_GET; + return 0; +} + +int uvc_swentity_init(struct uvc_device *dev) +{ + static const u8 uvc_swentity_guid[] = UVC_GUID_SWENTITY; + struct v4l2_fwnode_device_properties props; + struct uvc_entity *unit; + int ret; + + ret = v4l2_fwnode_device_parse(&dev->udev->dev, &props); + if (ret) + return dev_err_probe(&dev->intf->dev, ret, + "Can't parse fwnode\n"); + + if (props.orientation == V4L2_FWNODE_PROPERTY_UNSET) + return 0; + + unit = uvc_alloc_new_entity(dev, UVC_SWENTITY_UNIT, + UVC_SWENTITY_UNIT_ID, 0, 1); + if (!unit) + return -ENOMEM; + + memcpy(unit->guid, uvc_swentity_guid, sizeof(unit->guid)); + unit->swentity.props = props; + unit->swentity.bControlSize = 1; + unit->swentity.bmControls = (u8 *)unit + sizeof(*unit); + unit->swentity.bmControls[0] = 1; + unit->get_cur = uvc_swentity_get_cur; + unit->get_info = uvc_swentity_get_info; + strscpy(unit->name, "SWENTITY", sizeof(unit->name)); + + list_add_tail(&unit->list, &dev->entities); + + dev->swentity_unit = unit; + + return 0; +} diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 24292efbe47d3cd440252afb85ecbc826e2eedc1..04ca5dcce11d902dbfdf32f2a962159ba7940a39 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -18,6 +18,7 @@ #include #include #include +#include #include /* -------------------------------------------------------------------------- @@ -38,6 +39,9 @@ (UVC_ENTITY_IS_TERM(entity) && \ ((entity)->type & 0x8000) == UVC_TERM_OUTPUT) +#define UVC_SWENTITY_UNIT 0x7ffd +#define UVC_SWENTITY_UNIT_ID 0x101 + #define UVC_EXT_GPIO_UNIT 0x7ffe #define UVC_EXT_GPIO_UNIT_ID 0x100 @@ -247,6 +251,12 @@ struct uvc_entity { int irq; bool initialized; } gpio; + + struct { + u8 bControlSize; + u8 *bmControls; + struct v4l2_fwnode_device_properties props; + } swentity; }; u8 bNrInPins; @@ -623,6 +633,7 @@ struct uvc_device { } async_ctrl; struct uvc_entity *gpio_unit; + struct uvc_entity *swentity_unit; }; struct uvc_fh { @@ -688,6 +699,9 @@ do { \ */ struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id); +struct uvc_entity *uvc_alloc_new_entity(struct uvc_device *dev, u16 type, + u16 id, unsigned int num_pads, + unsigned int extra_size); /* Video buffers queue management. */ int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type); @@ -813,4 +827,7 @@ void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream); size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, size_t size); +/* swentity */ +int uvc_swentity_init(struct uvc_device *dev); + #endif diff --git a/include/linux/usb/uvc.h b/include/linux/usb/uvc.h index 22e0dab0809e296e089940620ae0e8838e109701..654182c2d22cdd9c72709247c1c8cabf9f5b19ee 100644 --- a/include/linux/usb/uvc.h +++ b/include/linux/usb/uvc.h @@ -29,6 +29,9 @@ #define UVC_GUID_EXT_GPIO_CONTROLLER \ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03} +#define UVC_GUID_SWENTITY \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04} #define UVC_GUID_CHROMEOS_XU \ {0x24, 0xe9, 0xd7, 0x74, 0xc9, 0x49, 0x45, 0x4a, \ 0x98, 0xa3, 0xc8, 0x07, 0x7e, 0x05, 0x1c, 0xa3} -- 2.51.0.536.g15c5d4f767-goog