From patchwork Fri Sep 30 06:40:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunke Cao X-Patchwork-Id: 86428 X-Patchwork-Delegate: laurent.pinchart@ideasonboard.com Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1oe9i6-0037pq-B9; Fri, 30 Sep 2022 06:41:22 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230337AbiI3GlS (ORCPT + 1 other); Fri, 30 Sep 2022 02:41:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230376AbiI3GlQ (ORCPT ); Fri, 30 Sep 2022 02:41:16 -0400 Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 693051A06E for ; Thu, 29 Sep 2022 23:41:15 -0700 (PDT) Received: by mail-pl1-x649.google.com with SMTP id h11-20020a170902f54b00b001780f0f7ea7so2613394plf.9 for ; Thu, 29 Sep 2022 23:41:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date; bh=hsKpGR6ZAwwrbPQSkvSMIn3H2D248KIeuadqPOigFCY=; b=e0tGMWIEgzQJBygDwbStFuAEr6L1PVLhFLjoKnT7ZEneInY7Z8YzIan6klDoqS/DMT ZEXmNSPjmMR1+SYVoPjupaU8950utqIEL/e33/6BbNdM1cBj6kcp2KApfTv2hf3A+2Ed 2GfNv5MluH4Chvcuf1vaiO0wx/CH+j1CF0csDTAnwlU2hbMdlEGGg8LbruKm9C6bXmj0 bYBwxs95SOzfaPAO69N/x9VhiMOWAxzOmmfxVdfAtwNEYAuymtJpRsJWkdgywuFOZlX1 E+bk2xO5sWTuwWr4By/qqQb7gdqAIWgP8rl0ErgCNHyC2DAILXGhX5UyA+vS0SxeMHjC zaSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=hsKpGR6ZAwwrbPQSkvSMIn3H2D248KIeuadqPOigFCY=; b=nyuv2gVNAM1BdzAxL0wnEd+YX7MmT5vvWGW5qdESj8+Oyas6u7rD4lDcPFcLTOudX8 F/4czmdETcY8HMEa2e7Ot2XuTLfu4VPCoGWZ7QTHffflW4n3N5d7gxjXZnIgNujIeeF8 nSLbfiLcQJHHKfnCjVpCcFPqEpmZdokFNDIMeDpg+c1vU63ByUfoWaW3EL4JhT6Fk6RK WTm9ipoR55snOvQCGiMmxUkpdOcEDjIIaMBRM/lz3mYvNMRy+1PEPv/quqGMKgAidUzR 3excmxzkMGtEgTAP3qRl2EDfb7L2qDiTA7PkT9CGZ4VU62AgGdw2Y3i2UEhZF2ngyfjI jQkQ== X-Gm-Message-State: ACrzQf1HZ3JBmyNuY1IZK2TUuC7XxQdV0bQIcwr7Jg1nokN+xK4dxcne IUrACv1lKH0PWoIIg91iAlwaAkBu1nI= X-Google-Smtp-Source: AMsMyM4AMQjD91gSWwMAeTyvsj9y1SNNUeUDzu2s3sswNAB3fZ9ZwWD73I6sPZsxJg2GKD0WoHcqw4OWz14= X-Received: from yunkec1.tok.corp.google.com ([2401:fa00:8f:203:d86:8b01:88ae:86c1]) (user=yunkec job=sendgmr) by 2002:a17:902:b601:b0:17a:695:b5bf with SMTP id b1-20020a170902b60100b0017a0695b5bfmr7148166pls.35.1664520074980; Thu, 29 Sep 2022 23:41:14 -0700 (PDT) Date: Fri, 30 Sep 2022 15:40:51 +0900 In-Reply-To: <20220930064059.3633710-1-yunkec@google.com> Mime-Version: 1.0 References: <20220930064059.3633710-1-yunkec@google.com> X-Mailer: git-send-email 2.38.0.rc1.362.ged0d419d3c-goog Message-ID: <20220930064059.3633710-3-yunkec@google.com> Subject: [PATCH v8 02/10] media: uvcvideo: add uvc_ctrl_get_boundary for getting default value From: Yunke Cao To: Hans Verkuil , Laurent Pinchart Cc: Nicolas Dufresne , Mauro Carvalho Chehab , Tomasz Figa , Sergey Senozhatsky , Ricardo Ribalda , linux-media@vger.kernel.org, Yunke Cao X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -10.0 (----------) X-LSpam-Report: No, score=-10.0 required=5.0 tests=BAYES_00=-1.9,DKIMWL_WL_MED=0.001,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,USER_IN_DEF_DKIM_WL=-7.5 autolearn=ham autolearn_force=no Introduce uvc_ctrl_get_boundary(), making it easier to extend to support compound controls and V4L2_CTRL_WHICH_MIN/MAX_VAL in the following patches. For now, it simply returns EINVAL for compound controls and calls __query_v4l2_ctrl() for non-compound controls. Reviewed-by: Ricardo Ribalda Signed-off-by: Yunke Cao --- Changelog since v7: - Rename uvc_ctrl_get_fixed() to uvc_ctrl_get_boundary(). - Move refactor (introduce __uvc_ctrl_get_boundary_std()) in this patch instead of in the patch where we implement compound control. - Fix locking. uvc_ctrl_get_boundary() now acquires ctrl_mutex. __uvc_ctrl_get_boundary_std() calls __uvc_query_v4l2_ctrl() while holding the mutex. - Define a uvc_ctrl_mapping_is_compound() for readability. drivers/media/usb/uvc/uvc_ctrl.c | 48 ++++++++++++++++++++++++++++++++ drivers/media/usb/uvc/uvc_v4l2.c | 6 +--- drivers/media/usb/uvc/uvcvideo.h | 2 ++ 3 files changed, 51 insertions(+), 5 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 97f312020516..40a47e9a93a8 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -836,6 +836,12 @@ static void uvc_set_le_value(struct uvc_control_mapping *mapping, } } +static bool +uvc_ctrl_mapping_is_compound(const struct uvc_control_mapping *mapping) +{ + return mapping->v4l2_type >= V4L2_CTRL_COMPOUND_TYPES; +} + /* ------------------------------------------------------------------------ * Terminal and unit management */ @@ -1742,6 +1748,48 @@ int uvc_ctrl_get(struct uvc_video_chain *chain, return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); } +int __uvc_ctrl_get_boundary_std(struct uvc_video_chain *chain, + struct uvc_control *ctrl, + struct uvc_control_mapping *mapping, + struct v4l2_ext_control *xctrl) +{ + struct v4l2_queryctrl qc = { .id = xctrl->id }; + + int ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &qc); + + if (ret < 0) + return ret; + + xctrl->value = qc.default_value; + return 0; +} + +int uvc_ctrl_get_boundary(struct uvc_video_chain *chain, + struct v4l2_ext_control *xctrl) +{ + struct uvc_control *ctrl; + struct uvc_control_mapping *mapping; + int ret; + + if (mutex_lock_interruptible(&chain->ctrl_mutex)) + return -ERESTARTSYS; + + ctrl = uvc_find_control(chain, xctrl->id, &mapping); + if (!ctrl) { + ret = -EINVAL; + goto done; + } + + if (uvc_ctrl_mapping_is_compound(mapping)) + ret = -EINVAL; + else + ret = __uvc_ctrl_get_boundary_std(chain, ctrl, mapping, xctrl); + +done: + mutex_unlock(&chain->ctrl_mutex); + return ret; +} + int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl) { diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 4cc3fa6b8c98..d844da6f307c 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -1046,15 +1046,11 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh, if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) { for (i = 0; i < ctrls->count; ++ctrl, ++i) { - struct v4l2_queryctrl qc = { .id = ctrl->id }; - - ret = uvc_query_v4l2_ctrl(chain, &qc); + ret = uvc_ctrl_get_boundary(chain, ctrl); if (ret < 0) { ctrls->error_idx = i; return ret; } - - ctrl->value = qc.default_value; } return 0; diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 24c911aeebce..dce9e3ca764d 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -903,6 +903,8 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle) } int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); +int uvc_ctrl_get_boundary(struct uvc_video_chain *chain, + struct v4l2_ext_control *xctrl); int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl); int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, bool read);