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| author | Yunke Cao <yunkec@google.com> | 2022-07-07 10:53:31 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-08-30 16:09:41 +0200 |
| commit | 5f36851c36b30f713f588ed2b60aa7b4512e2c76 (patch) | |
| tree | 75a5107cc5d61afecd1d6c63de224a74a9f0ded7 /drivers/media | |
| parent | media: uvcvideo: Fix typo 'the the' in comment (diff) | |
| download | linux-5f36851c36b30f713f588ed2b60aa7b4512e2c76.tar.xz linux-5f36851c36b30f713f588ed2b60aa7b4512e2c76.zip | |
media: uvcvideo: Use entity get_cur in uvc_ctrl_set
Entity controls should get_cur using an entity-defined function
instead of via a query. Fix this in uvc_ctrl_set.
Fixes: 65900c581d01 ("media: uvcvideo: Allow entity-defined get_info and get_cur")
Signed-off-by: Yunke Cao <yunkec@google.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_ctrl.c | 83 |
1 files changed, 46 insertions, 37 deletions
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 5c33b0b7ef9a..97f312020516 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -985,36 +985,56 @@ static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping, return value; } -static int __uvc_ctrl_get(struct uvc_video_chain *chain, - struct uvc_control *ctrl, struct uvc_control_mapping *mapping, - s32 *value) +static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain, + struct uvc_control *ctrl) { + u8 *data; int ret; - if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) - return -EACCES; + if (ctrl->loaded) + return 0; - if (!ctrl->loaded) { - if (ctrl->entity->get_cur) { - ret = ctrl->entity->get_cur(chain->dev, - ctrl->entity, - ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - } else { - ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, - ctrl->entity->id, - chain->dev->intfnum, - ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - } - if (ret < 0) - return ret; + data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT); + if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { + memset(data, 0, ctrl->info.size); ctrl->loaded = 1; + + return 0; } + if (ctrl->entity->get_cur) + ret = ctrl->entity->get_cur(chain->dev, ctrl->entity, + ctrl->info.selector, data, + ctrl->info.size); + else + ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, + ctrl->entity->id, chain->dev->intfnum, + ctrl->info.selector, data, + ctrl->info.size); + + if (ret < 0) + return ret; + + ctrl->loaded = 1; + + return ret; +} + +static int __uvc_ctrl_get(struct uvc_video_chain *chain, + struct uvc_control *ctrl, + struct uvc_control_mapping *mapping, + s32 *value) +{ + int ret; + + if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) + return -EACCES; + + ret = __uvc_ctrl_load_cur(chain, ctrl); + if (ret < 0) + return ret; + *value = __uvc_ctrl_get_value(mapping, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); @@ -1810,21 +1830,10 @@ int uvc_ctrl_set(struct uvc_fh *handle, * needs to be loaded from the device to perform the read-modify-write * operation. */ - if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) { - if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { - memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - 0, ctrl->info.size); - } else { - ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, - ctrl->entity->id, chain->dev->intfnum, - ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - if (ret < 0) - return ret; - } - - ctrl->loaded = 1; + if ((ctrl->info.size * 8) != mapping->size) { + ret = __uvc_ctrl_load_cur(chain, ctrl); + if (ret < 0) + return ret; } /* Backup the current value in case we need to rollback later. */ |