From patchwork Thu Aug 17 07:17:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunke Cao X-Patchwork-Id: 715301 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E23ACC2FC18 for ; Thu, 17 Aug 2023 07:18:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348430AbjHQHS0 (ORCPT ); Thu, 17 Aug 2023 03:18:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348435AbjHQHSR (ORCPT ); Thu, 17 Aug 2023 03:18:17 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F4D3FE for ; Thu, 17 Aug 2023 00:18:15 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-d71f505d21dso1259189276.3 for ; Thu, 17 Aug 2023 00:18:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1692256695; x=1692861495; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Zevxs++lsxnv93OkZO8YTVF7cg6tcC1IV3pWEIaVFvo=; b=K6Fo7jfc/NfYyGW/gKCkhAWuFitYeUtAq48eOZH/qSeNGbXJQuwxdzB34chA4iMhoz hy6EUXZMraKV0nuNikI69BOa7JalNZjuz58YW1CDr2i0MUWaTNp2Yg+w5xXBvWyTcwFo a5wfDBfml4Q2nFqCXb96IR2v+YJAhI+AQUghl1/ebhvCQK5zbPA0ZFMrd65aKR3EliIF pPtBRecJqzV3hNLFhAyEYjkI5UYImmfCpB4i6UzkQpW6/ouFiIDGZW58AsUqMZuOQUpE tEu+OPESePPZFgipqi1AMsM9cw507YMCy2nsIiMO05vDyyAtMJfzEtQxltmulW/8sjyd MNaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692256695; x=1692861495; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Zevxs++lsxnv93OkZO8YTVF7cg6tcC1IV3pWEIaVFvo=; b=kf0e71jKEJoFoS1dOU3RARtB1Uk515qHMteJu8TrT+jIq6MhYGoXgFu/n7dVRIHvPa LA1dkxJgcUPiTzWSxpagxPc8LKm7eExxeCOW+42R2Q6YFkTYi60H9cBvtwRt5iF1zVxW II9nxedOuslA94Eq+bYnWYNTTmxNQ3PH4e51oWm0X015OTKR2nMcTDM/C38V+N+UnBq6 TmLESD2GxcaA7Idjm80+7UAPXDxVvZeXiq7sJhIBiLAtAXoXJG2Gyhls5T07GJr9T25j Q3DktAO9Vne2jfbTyt98YdeBoyTpOOFSP8Eccp6jm+/s877xvc3GvcqxqLuImd11kGqJ Euzw== X-Gm-Message-State: AOJu0Yzse2jW5eN5dBMaLkoFG7+UoPDJU4mkNU9ZkGI4s7e40EBxHDZt xOYIPP20hO2QUhJ+R48Pt2UdBPAfZyI= X-Google-Smtp-Source: AGHT+IHqZvC/focITkNuRyugPIJvG6653iOKkoM3ea+k43LN9HeWDqYft/Jpi72vCsTXAQaLry8IimnTbsY= X-Received: from yunkec1.tok.corp.google.com ([2401:fa00:8f:203:cb5f:f997:f2a2:88c6]) (user=yunkec job=sendgmr) by 2002:a25:ce45:0:b0:d4c:d744:2ad with SMTP id x66-20020a25ce45000000b00d4cd74402admr52139ybe.10.1692256694769; Thu, 17 Aug 2023 00:18:14 -0700 (PDT) Date: Thu, 17 Aug 2023 16:17:31 +0900 In-Reply-To: <20230817071750.2830271-1-yunkec@google.com> Mime-Version: 1.0 References: <20230817071750.2830271-1-yunkec@google.com> X-Mailer: git-send-email 2.41.0.694.ge786442a9b-goog Message-ID: <20230817071750.2830271-4-yunkec@google.com> Subject: [PATCH v12 03/11] media: uvcvideo: introduce __uvc_ctrl_get_std() From: Yunke Cao To: Hans Verkuil , Laurent Pinchart , Daniel Scally Cc: Tomasz Figa , Sergey Senozhatsky , Ricardo Ribalda , linux-media@vger.kernel.org, Yunke Cao Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Refactor uvc_ctrl to make adding compound control easier. Currently __uvc_ctrl_get() only work for non-compound controls. Move the logic into __uvc_ctrl_std(), return error for compound controls. Make __uvc_ctrl_get() call __uvc_ctrl_std() inside. Also modify some of the callers of __uvc_ctrl_get() to call __uvc_ctrl_get_std() instead. Signed-off-by: Yunke Cao --- Changelog since v11: - Minor change to avoid negative if statement. Changelog since v10: - Better commit message. Changelog since v9: - No change. Changelog since v8: - No change. Changelog since v7: - Newly added patch. Split the refactoring of uvc_ctrl_get from v7 3/7. drivers/media/usb/uvc/uvc_ctrl.c | 42 +++++++++++++++++++++----------- 1 file changed, 28 insertions(+), 14 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 4a4ceb6289f5..b73a7e3812cf 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1081,15 +1081,15 @@ static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain, return ret; } -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_get_std(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; + if (uvc_ctrl_mapping_is_compound(mapping)) + return -EINVAL; ret = __uvc_ctrl_load_cur(chain, ctrl); if (ret < 0) @@ -1199,7 +1199,7 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) return 0; - ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); + ret = __uvc_ctrl_get_std(chain, master_ctrl, master_map, &val); if (ret >= 0 && val != mapping->master_manual) return -EACCES; @@ -1264,8 +1264,13 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, __uvc_find_control(ctrl->entity, mapping->master_id, &master_map, &master_ctrl, 0); if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) { - s32 val; - int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); + s32 val = 0; + int ret; + + if (uvc_ctrl_mapping_is_compound(master_map)) + return -EINVAL; + + ret = __uvc_ctrl_get_std(chain, master_ctrl, master_map, &val); if (ret < 0) return ret; @@ -1529,7 +1534,8 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, if (ctrl == NULL) return; - if (__uvc_ctrl_get(chain, ctrl, mapping, &val) == 0) + if (uvc_ctrl_mapping_is_compound(mapping) || + __uvc_ctrl_get_std(chain, ctrl, mapping, &val) == 0) changes |= V4L2_EVENT_CTRL_CH_VALUE; uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); @@ -1700,7 +1706,8 @@ static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; s32 val = 0; - if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) + if (uvc_ctrl_mapping_is_compound(mapping) || + __uvc_ctrl_get_std(handle->chain, ctrl, mapping, &val) == 0) changes |= V4L2_EVENT_CTRL_CH_VALUE; uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, @@ -1880,7 +1887,10 @@ int uvc_ctrl_get(struct uvc_video_chain *chain, if (ctrl == NULL) return -EINVAL; - return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); + if (uvc_ctrl_mapping_is_compound(mapping)) + return -EINVAL; + else + return __uvc_ctrl_get_std(chain, ctrl, mapping, &xctrl->value); } static int __uvc_ctrl_get_boundary_std(struct uvc_video_chain *chain, @@ -2039,8 +2049,12 @@ int uvc_ctrl_set(struct uvc_fh *handle, ctrl->info.size); } - mapping->set(mapping, value, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); + if (uvc_ctrl_mapping_is_compound(mapping)) + return -EINVAL; + else + mapping->set(mapping, value, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); + if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) ctrl->handle = handle;