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[34.88.52.90]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-553379379c2sm2641210e87.251.2025.06.05.10.53.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Jun 2025 10:53:07 -0700 (PDT) From: Ricardo Ribalda Date: Thu, 05 Jun 2025 17:53:02 +0000 Subject: [PATCH v2 09/12] media: uvcvideo: Add uvc_ctrl_query_entity helper Precedence: bulk X-Mailing-List: linux-usb@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: <20250605-uvc-orientation-v2-9-5710f9d030aa@chromium.org> References: <20250605-uvc-orientation-v2-0-5710f9d030aa@chromium.org> In-Reply-To: <20250605-uvc-orientation-v2-0-5710f9d030aa@chromium.org> To: Laurent Pinchart , Hans de Goede , Mauro Carvalho Chehab , Hans Verkuil , Sakari Ailus , Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski , "Rafael J. Wysocki" , Len Brown 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, Ricardo Ribalda X-Mailer: b4 0.14.2 Create a helper function to query a control. The new function reduces the number of arguments, calculates the length of the operation and redirects the operation to the hardware or to the entity private functions. Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_ctrl.c | 81 ++++++++++++++++++++-------------------- 1 file changed, 41 insertions(+), 40 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index b2768080c08aafa85acb9b7f318672c043d84e55..21ec7b978bc7aca21db7cb8fd5d135d876f3330c 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -576,6 +576,34 @@ static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc15 = { V4L2_CID_POWER_LINE_FREQUENCY_DISABLED), }; +static int uvc_ctrl_query_entity(struct uvc_device *dev, + const struct uvc_control *ctrl, u8 query, + void *data) +{ + u16 len; + + switch (query) { + case UVC_GET_INFO: + len = 1; + break; + case UVC_GET_LEN: + len = 2; + break; + default: + len = ctrl->info.size; + } + + if (query == UVC_GET_CUR && ctrl->entity->get_cur) + return ctrl->entity->get_cur(dev, ctrl->entity, + ctrl->info.selector, data, len); + if (query == UVC_GET_INFO && ctrl->entity->get_info) + return ctrl->entity->get_info(dev, ctrl->entity, + ctrl->info.selector, data); + + return uvc_query_ctrl(dev, query, ctrl->entity->id, dev->intfnum, + ctrl->info.selector, data, len); +} + static const struct uvc_control_mapping *uvc_ctrl_filter_plf_mapping( struct uvc_video_chain *chain, struct uvc_control *ctrl) { @@ -1222,35 +1250,27 @@ static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, int ret; if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, - chain->dev->intfnum, ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), - ctrl->info.size); + ret = uvc_ctrl_query_entity(chain->dev, ctrl, UVC_GET_DEF, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); if (ret < 0) return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, - chain->dev->intfnum, ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), - ctrl->info.size); + ret = uvc_ctrl_query_entity(chain->dev, ctrl, UVC_GET_MIN, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); if (ret < 0) return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, - chain->dev->intfnum, ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), - ctrl->info.size); + ret = uvc_ctrl_query_entity(chain->dev, ctrl, UVC_GET_MAX, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); if (ret < 0) return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, - chain->dev->intfnum, ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), - ctrl->info.size); + ret = uvc_ctrl_query_entity(chain->dev, ctrl, UVC_GET_RES, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); if (ret < 0) { if (UVC_ENTITY_TYPE(ctrl->entity) != UVC_VC_EXTENSION_UNIT) @@ -1291,16 +1311,7 @@ static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain, 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); - + ret = uvc_ctrl_query_entity(chain->dev, ctrl, UVC_GET_CUR, data); if (ret < 0) return ret; @@ -2164,11 +2175,8 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, continue; if (!rollback) - ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, - dev->intfnum, ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - + ret = uvc_ctrl_query_entity(dev, ctrl, UVC_SET_CUR, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); if (!ret) processed_ctrls++; @@ -2570,13 +2578,7 @@ static int uvc_ctrl_get_flags(struct uvc_device *dev, if (data == NULL) return -ENOMEM; - if (ctrl->entity->get_info) - ret = ctrl->entity->get_info(dev, ctrl->entity, - ctrl->info.selector, data); - else - ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, - dev->intfnum, info->selector, data, 1); - + ret = uvc_ctrl_query_entity(dev, ctrl, UVC_GET_INFO, data); if (!ret) { info->flags &= ~(UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_SET_CUR | @@ -2654,8 +2656,7 @@ static int uvc_ctrl_fill_xu_info(struct uvc_device *dev, info->selector = ctrl->index + 1; /* Query and verify the control length (GET_LEN) */ - ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum, - info->selector, data, 2); + ret = uvc_ctrl_query_entity(dev, ctrl, UVC_GET_LEN, data); if (ret < 0) { uvc_dbg(dev, CONTROL, "GET_LEN failed on control %pUl/%u (%d)\n", -- 2.50.0.rc0.642.g800a2b2222-goog