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[35.228.153.64]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-58527c6b014sm123872e87.43.2025.09.26.06.11.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Sep 2025 06:11:35 -0700 (PDT) From: Ricardo Ribalda Date: Fri, 26 Sep 2025 13:11:34 +0000 Subject: [PATCH v3 10/12] media: uvcvideo: Add uvc_ctrl_query_entity helper Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250926-uvc-orientation-v3-10-6dc2fa5b4220@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 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 | 83 +++++++++++++++++++++---------------= ---- 1 file changed, 43 insertions(+), 40 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_c= trl.c index 98e454fcdeb2ee36d334068fd750e6203931699d..017165a5c94459f1befd4c08f85= a2017c58d61e6 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -598,6 +598,36 @@ static const struct uvc_control_mapping uvc_ctrl_power= _line_mapping_uvc15 =3D { V4L2_CID_POWER_LINE_FREQUENCY_DISABLED), }; =20 +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 =3D 1; + break; + case UVC_GET_LEN: + len =3D 2; + break; + default: + len =3D ctrl->info.size; + break; + } + + if (query =3D=3D UVC_GET_CUR && ctrl->entity->get_cur) + return ctrl->entity->get_cur(dev, ctrl->entity, + ctrl->info.selector, data, len); + else if (query =3D=3D UVC_GET_INFO && ctrl->entity->get_info) + return ctrl->entity->get_info(dev, ctrl->entity, + ctrl->info.selector, data); + else + 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) { @@ -1256,35 +1286,27 @@ static int uvc_ctrl_populate_cache(struct uvc_video= _chain *chain, int ret; =20 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { - ret =3D 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 =3D uvc_ctrl_query_entity(chain->dev, ctrl, UVC_GET_DEF, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); if (ret < 0) return ret; } =20 if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) { - ret =3D 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 =3D 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 =3D 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 =3D 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 =3D 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 =3D 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) !=3D UVC_VC_EXTENSION_UNIT) @@ -1325,16 +1347,7 @@ static int __uvc_ctrl_load_cur(struct uvc_video_chai= n *chain, return 0; } =20 - if (ctrl->entity->get_cur) - ret =3D ctrl->entity->get_cur(chain->dev, ctrl->entity, - ctrl->info.selector, data, - ctrl->info.size); - else - ret =3D uvc_query_ctrl(chain->dev, UVC_GET_CUR, - ctrl->entity->id, chain->dev->intfnum, - ctrl->info.selector, data, - ctrl->info.size); - + ret =3D uvc_ctrl_query_entity(chain->dev, ctrl, UVC_GET_CUR, data); if (ret < 0) return ret; =20 @@ -2244,11 +2257,8 @@ static int uvc_ctrl_commit_entity(struct uvc_device = *dev, continue; =20 if (!rollback) - ret =3D 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 =3D uvc_ctrl_query_entity(dev, ctrl, UVC_SET_CUR, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); if (!ret) processed_ctrls++; =20 @@ -2650,13 +2660,7 @@ static int uvc_ctrl_get_flags(struct uvc_device *dev, if (data =3D=3D NULL) return -ENOMEM; =20 - if (ctrl->entity->get_info) - ret =3D ctrl->entity->get_info(dev, ctrl->entity, - ctrl->info.selector, data); - else - ret =3D uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, - dev->intfnum, info->selector, data, 1); - + ret =3D uvc_ctrl_query_entity(dev, ctrl, UVC_GET_INFO, data); if (!ret) { info->flags &=3D ~(UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_SET_CUR | @@ -2738,8 +2742,7 @@ static int uvc_ctrl_fill_xu_info(struct uvc_device *d= ev, ctrl->info.selector =3D info->selector; =20 /* Query and verify the control length (GET_LEN) */ - ret =3D uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum, - info->selector, data, 2); + ret =3D 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", --=20 2.51.0.536.g15c5d4f767-goog