From 9b31ea808a4468d5d606d1f82c58b7e7bfb99f66 Mon Sep 17 00:00:00 2001
From: Ricardo Ribalda <ribalda@chromium.org>
Date: Fri, 18 Jun 2021 14:29:11 +0200
Subject: [PATCH] media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS
Git-commit: 9b31ea808a4468d5d606d1f82c58b7e7bfb99f66
Patch-mainline: v5.16-rc1
References: git-fixes
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 <hverkuil-cisco@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/usb/uvc/uvc_ctrl.c | 90 ++++++++++++++++++++++++++++++++
drivers/media/usb/uvc/uvcvideo.h | 1 +
2 files changed, 91 insertions(+)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index b75da65115ef..7c1d71782281 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -357,6 +357,11 @@ static const struct uvc_control_info uvc_ctrls[] = {
},
};
+static const u32 uvc_control_classes[] = {
+ V4L2_CID_CAMERA_CLASS,
+ V4L2_CID_USER_CLASS,
+};
+
static const struct uvc_menu_info power_line_frequency_controls[] = {
{ 0, "Disabled" },
{ 1, "50 Hz" },
@@ -1024,6 +1029,49 @@ 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_classes); i++) {
+ if (!(chain->ctrl_class_bitmap & BIT(i)))
+ continue;
+ if (!find_next) {
+ if (uvc_control_classes[i] == req_id)
+ return i;
+ continue;
+ }
+ if (uvc_control_classes[i] > req_id &&
+ uvc_control_classes[i] < 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_classes[idx];
+ 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;
+ return 0;
+}
+
static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
@@ -1127,12 +1175,31 @@ 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 +1493,11 @@ 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 +1531,10 @@ 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 +1652,9 @@ 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 +1674,9 @@ 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 +2143,7 @@ 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 +2167,14 @@ 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_classes); i++) {
+ if (V4L2_CTRL_ID2WHICH(uvc_control_classes[i]) ==
+ 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 cce5e38133cd..5eb7e87f8430 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -476,6 +476,7 @@ 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 {
--
2.35.3