From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1F5AC48BDF for ; Thu, 10 Jun 2021 16:43:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ACA82613DD for ; Thu, 10 Jun 2021 16:43:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231903AbhFJQpC (ORCPT ); Thu, 10 Jun 2021 12:45:02 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:47984 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231940AbhFJQoU (ORCPT ); Thu, 10 Jun 2021 12:44:20 -0400 Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 454CB8D4; Thu, 10 Jun 2021 18:42:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1623343342; bh=WxUgekAYwUyYPC/c4uEN/Z7IcSqFvq6TtpDB1rza83A=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PGUpR+favqqQh+xWTtfzmCkvi0px76HpZ1przHhxx3jpzI+uc5Tv9vhMLXqlvl3qA x8KCM3lBqyi4+5WSmDFlwqJHyvwuJGvR0xzJzlYjyDRAcDTkAJVEXTdZOpEYFlJp30 3GXkFO2/4NSa4NGx6nAi9SliirN9xUHbm8iIyWAs= Date: Thu, 10 Jun 2021 19:42:03 +0300 From: Laurent Pinchart To: Ricardo Ribalda Cc: Mauro Carvalho Chehab , Hans Verkuil , Sergey Senozhatsky , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, tfiga@chromium.org Subject: Re: [PATCH v9 09/22] media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS Message-ID: References: <20210326095840.364424-1-ribalda@chromium.org> <20210326095840.364424-10-ribalda@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210326095840.364424-10-ribalda@chromium.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ricardo, Thank you for the patch. On Fri, Mar 26, 2021 at 10:58:27AM +0100, Ricardo Ribalda wrote: > Create all the class controls for the device defined controls. > > Fixes v4l2-compliance: > Control ioctls (Input 0): > fail: v4l2-test-controls.cpp(216): missing control class for class 00980000 > fail: v4l2-test-controls.cpp(216): missing control tclass for class 009a0000 > test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: FAIL > > Reviewed-by: Hans Verkuil > Signed-off-by: Ricardo Ribalda > --- > drivers/media/usb/uvc/uvc_ctrl.c | 94 ++++++++++++++++++++++++++++++++ > drivers/media/usb/uvc/uvcvideo.h | 5 ++ > 2 files changed, 99 insertions(+) > > diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c > index b75da65115ef..ba14733db757 100644 > --- a/drivers/media/usb/uvc/uvc_ctrl.c > +++ b/drivers/media/usb/uvc/uvc_ctrl.c > @@ -357,6 +357,15 @@ static const struct uvc_control_info uvc_ctrls[] = { > }, > }; > > +static const struct uvc_control_class uvc_control_class[] = { Nitpicking, I'd name the array (not the struct) uvc_control_classes. And as the structure only contains a single field, could we make this an array of u32 ? > + { > + .id = V4L2_CID_CAMERA_CLASS, > + }, > + { > + .id = V4L2_CID_USER_CLASS, > + }, > +}; > + > static const struct uvc_menu_info power_line_frequency_controls[] = { > { 0, "Disabled" }, > { 1, "50 Hz" }, > @@ -1024,6 +1033,49 @@ static int __uvc_ctrl_get(struct uvc_video_chain *chain, > return 0; > } > > +static int __uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id, > + u32 found_id) > +{ > + bool find_next = req_id & V4L2_CTRL_FLAG_NEXT_CTRL; > + unsigned int i; > + > + req_id &= V4L2_CTRL_ID_MASK; > + > + for (i = 0; i < ARRAY_SIZE(uvc_control_class); i++) { > + if (!(chain->ctrl_class_bitmap & BIT(i))) > + continue; > + if (!find_next) { > + if (uvc_control_class[i].id == req_id) > + return i; > + continue; > + } > + if (uvc_control_class[i].id > req_id && > + uvc_control_class[i].id < found_id) > + return i; > + } > + > + return -ENODEV; > +} > + > +static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id, > + u32 found_id, struct v4l2_queryctrl *v4l2_ctrl) > +{ > + int idx; > + > + idx = __uvc_query_v4l2_class(chain, req_id, found_id); > + if (idx < 0) > + return -ENODEV; > + > + memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); > + v4l2_ctrl->id = uvc_control_class[idx].id; > + strscpy(v4l2_ctrl->name, v4l2_ctrl_get_name(v4l2_ctrl->id), > + sizeof(v4l2_ctrl->name)); > + v4l2_ctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS; > + v4l2_ctrl->flags = V4L2_CTRL_FLAG_WRITE_ONLY > + | V4L2_CTRL_FLAG_READ_ONLY; Could you align the | below the = ? Reviewed-by: Laurent Pinchart > + return 0; > +} > + > static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, > struct uvc_control *ctrl, > struct uvc_control_mapping *mapping, > @@ -1127,12 +1179,31 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, > if (ret < 0) > return -ERESTARTSYS; > > + /* Check if the ctrl is a know class */ > + if (!(v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL)) { > + ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, 0, v4l2_ctrl); > + if (!ret) > + goto done; > + } > + > ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); > if (ctrl == NULL) { > ret = -EINVAL; > goto done; > } > > + /* > + * If we're enumerating control with V4L2_CTRL_FLAG_NEXT_CTRL, check if > + * a class should be inserted between the previous control and the one > + * we have just found. > + */ > + if (v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL) { > + ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, mapping->id, > + v4l2_ctrl); > + if (!ret) > + goto done; > + } > + > ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl); > done: > mutex_unlock(&chain->ctrl_mutex); > @@ -1426,6 +1497,11 @@ static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) > if (ret < 0) > return -ERESTARTSYS; > > + if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0) { > + ret = 0; > + goto done; > + } > + > ctrl = uvc_find_control(handle->chain, sev->id, &mapping); > if (ctrl == NULL) { > ret = -EINVAL; > @@ -1459,7 +1535,10 @@ static void uvc_ctrl_del_event(struct v4l2_subscribed_event *sev) > struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); > > mutex_lock(&handle->chain->ctrl_mutex); > + if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0) > + goto done; > list_del(&sev->node); > +done: > mutex_unlock(&handle->chain->ctrl_mutex); > } > > @@ -1577,6 +1656,9 @@ int uvc_ctrl_get(struct uvc_video_chain *chain, > struct uvc_control *ctrl; > struct uvc_control_mapping *mapping; > > + if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0) > + return -EACCES; > + > ctrl = uvc_find_control(chain, xctrl->id, &mapping); > if (ctrl == NULL) > return -EINVAL; > @@ -1596,6 +1678,9 @@ int uvc_ctrl_set(struct uvc_fh *handle, > s32 max; > int ret; > > + if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0) > + return -EACCES; > + > ctrl = uvc_find_control(chain, xctrl->id, &mapping); > if (ctrl == NULL) > return -EINVAL; > @@ -2062,6 +2147,7 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain, > { > struct uvc_control_mapping *map; > unsigned int size; > + unsigned int i; > > /* Most mappings come from static kernel data and need to be duplicated. > * Mappings that come from userspace will be unnecessarily duplicated, > @@ -2085,6 +2171,14 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain, > if (map->set == NULL) > map->set = uvc_set_le_value; > > + for (i = 0; i < ARRAY_SIZE(uvc_control_class); i++) { > + if (V4L2_CTRL_ID2WHICH(uvc_control_class[i].id) == > + V4L2_CTRL_ID2WHICH(map->id)) { > + chain->ctrl_class_bitmap |= BIT(i); > + break; > + } > + } > + > list_add_tail(&map->list, &ctrl->info.mappings); > uvc_dbg(chain->dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n", > map->name, ctrl->info.entity, ctrl->info.selector); > diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h > index 97df5ecd66c9..b81d3f65e52e 100644 > --- a/drivers/media/usb/uvc/uvcvideo.h > +++ b/drivers/media/usb/uvc/uvcvideo.h > @@ -262,6 +262,10 @@ struct uvc_control_mapping { > u8 *data); > }; > > +struct uvc_control_class { > + u32 id; > +}; > + > struct uvc_control { > struct uvc_entity *entity; > struct uvc_control_info info; > @@ -475,6 +479,7 @@ struct uvc_video_chain { > > struct v4l2_prio_state prio; /* V4L2 priority state */ > u32 caps; /* V4L2 chain-wide caps */ > + u8 ctrl_class_bitmap; /* Bitmap of valid classes */ > }; > > struct uvc_stats_frame { -- Regards, Laurent Pinchart