From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lf1-f46.google.com (mail-lf1-f46.google.com [209.85.167.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 102302F616C for ; Fri, 26 Sep 2025 13:11:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.46 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758892304; cv=none; b=NDe1l+kn16e0RMjbL3CCiBGxzdffTSW7hbmuzc+rO3E1ynBlmilmaWiF3syEQAPfi+H8nvqc9reY/NzzRyM2JNrnr6uU/aWSzc5zG0akhL/b8wvejg/2KqYzxJ6n10QUjV8fRJurI8hIzLi/N+gBe3PcWdXxpV0kEbkkuAUsHsI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758892304; c=relaxed/simple; bh=tSZ4e7bBWYDXs+64s5deuA0eU78Hb20V1QttJt4YMDI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=bnx9tZ22Xzicg5bTxYDS+t9W/zPwr+XjJRaXCdTCvXORRDDZzQMG+60rGYhHuKICx/UsNViRuFGGSprGXAhHW5Jz4eBoWGNYU3KOOVqyNT51Ff2N66Xkai1MVNR8fv1xd8oQ2/JyEVoRjmJsWtnzrfao47i7ItWXXCk9RX7n9FU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=jSjP4sHf; arc=none smtp.client-ip=209.85.167.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="jSjP4sHf" Received: by mail-lf1-f46.google.com with SMTP id 2adb3069b0e04-57d93a4b5e5so2431079e87.3 for ; Fri, 26 Sep 2025 06:11:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1758892296; x=1759497096; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=bphRunTYPw61AUvJ/YpfJ9I70eYp7wtD0WzfXD7gDd4=; b=jSjP4sHfuhbwLdbt121hI4bjomddVP4C91PLouwDoTn8W45OpvxY9oHbOMYkHXP/Lw c8Hfr/ASTHKxOx1wsdrwLvmuqe5lqMghcXhTd5wC7u8ovPA3zUJyM0m7q3FGh00hLZ+2 Smal8XpgJIgcjIV4ePaxghrnTsSwe6osmGAO8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758892296; x=1759497096; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=bphRunTYPw61AUvJ/YpfJ9I70eYp7wtD0WzfXD7gDd4=; b=Vx/Suz8EP+vF5N1SGyujmrC/MWx4jFQbThwfaik+114rtzTQBcCNZoy+VEAc/pooTE h+sLkf+jCCtrNb1jfB1BFxlXpmv/KmqbXg2k2Qjnd5FzOJaaDBJD5/aOBlGvHLIbzdQ6 SbSdlhg+LcTHRb0/GueeEBf97tVEOZaC934byYFDX1Hu0+HIYdatAWGfUsmg1iNaUVEo +PXSlvr0J4Kd3KeEIZjOKANwQ57BaE2TYa3FN3kMZS2z1gQNs7K+MMQ/wrGx5e6U8cqG yGAFSuhonFh/qOuuc67SLlJlHXg6aBnQRKbHJWUB7kDOFo/xpCu8huUFIe+B6ZB/ZEbA /dgA== X-Forwarded-Encrypted: i=1; AJvYcCUDvbE19cqiZdaHgDLqi/YC6eczInegVEVC9OisL73CcQx9xl+85dscjYb5mOqkT1f8oobqs4FmdNuD@vger.kernel.org X-Gm-Message-State: AOJu0YzrchcG+cydQN8GDmWNRpViqhvAx0YnBXhT1vbvZuyCLeZb3lIn qny5qPYr45lmz3jIFWjIgFSg0BmKNsXhJtHLWylWany3jm+ud8DUmhNro//r5+thRS0e45NxN4I VgCn5zw== X-Gm-Gg: ASbGncvcMceNkl1g7t/8ZYy6fBsjp9vScYm7smNUM1Ai69V3bO5FEE0SXKxwdO7PjrX k4YeKk7ZL+uh1SWgDobSYs+vBcs80Z74D7UaIFTtm2y72EUTHUAL2V5wvtvSszcVhDAApgsoRaO ytb8WndSqWgQ/n8Sr15KuROy9PMgyCcq29sM3BRs1hg3/wxKZcpdL7zTJ/7tB+iHkO5TH7Aw/Kl KVHem6KrgLFTF31wPypKsx9CvPPhO2co/dlJfgx0frEZZMjKG5yC56YZVxG7ez2+p3TQCsgMnv7 eR4XzHIGV05VPZl+W3SaFqf4U0+Iy+5Zp7DcCUPCpIRhA5+qTl8HHUs8BwhULZOX1aLvpt3ST5o rn0BVl6K/8O67bTZTck8paPVJg7e80s/sn+DmItFw+JYoqt4g996KOTa2uua58iInc2/7blqORu vsRdqCduzLSLSQ X-Google-Smtp-Source: AGHT+IEv9MbC6V8zP0dxYjK1OB4iFK32py7NZfWALirf9hP7Mf6Qwl9MxHAyd3yZAKgRpXN6nv2Waw== X-Received: by 2002:a05:6512:3f1b:b0:571:86bc:423b with SMTP id 2adb3069b0e04-582d3f76d9fmr2145509e87.44.1758892295887; Fri, 26 Sep 2025 06:11:35 -0700 (PDT) Received: from ribalda.c.googlers.com (64.153.228.35.bc.googleusercontent.com. [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-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-v3-10-6dc2fa5b4220@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_ctrl.c index 98e454fcdeb2ee36d334068fd750e6203931699d..017165a5c94459f1befd4c08f85a2017c58d61e6 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 = { 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; + break; + } + + if (query == UVC_GET_CUR && ctrl->entity->get_cur) + return ctrl->entity->get_cur(dev, ctrl->entity, + ctrl->info.selector, data, len); + else if (query == 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; 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) @@ -1325,16 +1347,7 @@ 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; @@ -2244,11 +2257,8 @@ 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++; @@ -2650,13 +2660,7 @@ 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 | @@ -2738,8 +2742,7 @@ static int uvc_ctrl_fill_xu_info(struct uvc_device *dev, ctrl->info.selector = info->selector; /* 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", -- 2.51.0.536.g15c5d4f767-goog