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[35.236.236.5]) by smtp.gmail.com with ESMTPSA id ada2fe7eead31-4b9baa9aefcsm1592770137.12.2025.02.03.03.56.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 03:56:06 -0800 (PST) From: Ricardo Ribalda Date: Mon, 03 Feb 2025 11:55:48 +0000 Subject: [PATCH v17 12/17] media: uvcvideo: support V4L2_CTRL_WHICH_MIN/MAX_VAL 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: <20250203-uvc-roi-v17-12-5900a9fed613@chromium.org> References: <20250203-uvc-roi-v17-0-5900a9fed613@chromium.org> In-Reply-To: <20250203-uvc-roi-v17-0-5900a9fed613@chromium.org> To: Laurent Pinchart , Mauro Carvalho Chehab , Hans de Goede , Sakari Ailus , Hans Verkuil Cc: Yunke Cao , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Ricardo Ribalda , Yunke Cao X-Mailer: b4 0.13.0 From: Yunke Cao Add support for V4L2_CTRL_WHICH_MIN/MAX_VAL in uvc driver. It is needed for the V4L2_CID_UVC_REGION_OF_INTEREST_RECT control. Signed-off-by: Yunke Cao Tested-by: Yunke Cao Reviewed-by: Hans de Goede Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_ctrl.c | 96 ++++++++++++++++++++++++++++++++----= ---- drivers/media/usb/uvc/uvc_v4l2.c | 2 + 2 files changed, 79 insertions(+), 19 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_c= trl.c index 6e27075939ac..4e29db334b2d 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1277,6 +1277,37 @@ static int uvc_query_v4l2_class(struct uvc_video_cha= in *chain, u32 req_id, return 0; } =20 +static bool uvc_ctrl_is_readable(u32 which, struct uvc_control *ctrl, + struct uvc_control_mapping *mapping) +{ + if (which =3D=3D V4L2_CTRL_WHICH_CUR_VAL) + return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR); + + if (which =3D=3D V4L2_CTRL_WHICH_DEF_VAL) + return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF); + + /* Types with implicit boundaries. */ + switch (mapping->v4l2_type) { + case V4L2_CTRL_TYPE_MENU: + case V4L2_CTRL_TYPE_BOOLEAN: + case V4L2_CTRL_TYPE_BUTTON: + return true; + case V4L2_CTRL_TYPE_BITMASK: + return (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) || + (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX); + default: + break; + } + + if (which =3D=3D V4L2_CTRL_WHICH_MIN_VAL) + return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN); + + if (which =3D=3D V4L2_CTRL_WHICH_MAX_VAL) + return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX); + + return false; +} + /* * Check if control @v4l2_id can be accessed by the given control @ioctl * (VIDIOC_G_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS or VIDIOC_S_EXT_CTRLS). @@ -1295,7 +1326,6 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *ch= ain, u32 v4l2_id, struct uvc_control *master_ctrl =3D NULL; struct uvc_control_mapping *mapping; struct uvc_control *ctrl; - bool read =3D ioctl =3D=3D VIDIOC_G_EXT_CTRLS; s32 val; int ret; int i; @@ -1307,10 +1337,10 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *= chain, u32 v4l2_id, if (!ctrl) return -EINVAL; =20 - if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) && read) - return -EACCES; + if (ioctl =3D=3D VIDIOC_G_EXT_CTRLS) + return uvc_ctrl_is_readable(ctrls->which, ctrl, mapping); =20 - if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read) + if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) return -EACCES; =20 if (ioctl !=3D VIDIOC_S_EXT_CTRLS || !mapping->master_id) @@ -1459,6 +1489,9 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_cha= in *chain, v4l2_ctrl->flags |=3D V4L2_CTRL_FLAG_WRITE_ONLY; if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) v4l2_ctrl->flags |=3D V4L2_CTRL_FLAG_READ_ONLY; + if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) && + (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN)) + v4l2_ctrl->flags |=3D V4L2_CTRL_FLAG_HAS_WHICH_MIN_MAX; =20 if (mapping->master_id) __uvc_find_control(ctrl->entity, mapping->master_id, @@ -2088,16 +2121,18 @@ static int uvc_mapping_get_xctrl_compound(struct uv= c_video_chain *chain, =20 switch (which) { case V4L2_CTRL_WHICH_CUR_VAL: - ret =3D __uvc_ctrl_load_cur(chain, ctrl); - if (ret < 0) - return ret; id =3D UVC_CTRL_DATA_CURRENT; query =3D UVC_GET_CUR; break; + case V4L2_CTRL_WHICH_MIN_VAL: + id =3D UVC_CTRL_DATA_MIN; + query =3D UVC_GET_MIN; + break; + case V4L2_CTRL_WHICH_MAX_VAL: + id =3D UVC_CTRL_DATA_MAX; + query =3D UVC_GET_MAX; + break; case V4L2_CTRL_WHICH_DEF_VAL: - ret =3D uvc_ctrl_populate_cache(chain, ctrl); - if (ret < 0) - return ret; id =3D UVC_CTRL_DATA_DEF; query =3D UVC_GET_DEF; break; @@ -2115,6 +2150,14 @@ static int uvc_mapping_get_xctrl_compound(struct uvc= _video_chain *chain, if (!data) return -ENOMEM; =20 + if (which =3D=3D V4L2_CTRL_WHICH_CUR_VAL) + ret =3D __uvc_ctrl_load_cur(chain, ctrl); + else + ret =3D uvc_ctrl_populate_cache(chain, ctrl); + + if (ret < 0) + return ret; + ret =3D mapping->get(mapping, query, uvc_ctrl_data(ctrl, id), size, data); if (ret < 0) return ret; @@ -2132,22 +2175,37 @@ static int uvc_mapping_get_xctrl_std(struct uvc_vid= eo_chain *chain, struct uvc_control_mapping *mapping, u32 which, struct v4l2_ext_control *xctrl) { + struct v4l2_queryctrl qc; + int ret; + switch (which) { case V4L2_CTRL_WHICH_CUR_VAL: return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); case V4L2_CTRL_WHICH_DEF_VAL: - if (!ctrl->cached) { - int ret =3D uvc_ctrl_populate_cache(chain, ctrl); + case V4L2_CTRL_WHICH_MIN_VAL: + case V4L2_CTRL_WHICH_MAX_VAL: + break; + default: + return -EINVAL; + } =20 - if (ret < 0) - return ret; - } - xctrl->value =3D uvc_mapping_get_s32(mapping, UVC_GET_DEF, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); - return 0; + ret =3D __uvc_queryctrl_boundaries(chain, ctrl, mapping, &qc); + if (ret < 0) + return ret; + + switch (which) { + case V4L2_CTRL_WHICH_DEF_VAL: + xctrl->value =3D qc.default_value; + break; + case V4L2_CTRL_WHICH_MIN_VAL: + xctrl->value =3D qc.minimum; + break; + case V4L2_CTRL_WHICH_MAX_VAL: + xctrl->value =3D qc.maximum; + break; } =20 - return -EINVAL; + return 0; } =20 static int uvc_mapping_get_xctrl(struct uvc_video_chain *chain, diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v= 4l2.c index 4025811fb9e7..ff7d0fd9e458 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -1036,6 +1036,8 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, v= oid *fh, switch (ctrls->which) { case V4L2_CTRL_WHICH_DEF_VAL: case V4L2_CTRL_WHICH_CUR_VAL: + case V4L2_CTRL_WHICH_MAX_VAL: + case V4L2_CTRL_WHICH_MIN_VAL: which =3D ctrls->which; break; default: --=20 2.48.1.362.g079036d154-goog