This is a note to let you know that I've just added the patch titled
media: uvcvideo: Implement mask for V4L2_CTRL_TYPE_MENU
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-uvcvideo-implement-mask-for-v4l2_ctrl_type_men.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ec9cfc8b59805b16b5a4466696944fe436df057f
Author: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Date: Thu Jan 5 14:52:54 2023 +0100
media: uvcvideo: Implement mask for V4L2_CTRL_TYPE_MENU
[ Upstream commit 40140eda661ea4be219ef194a4f43b7b5e3bbd27 ]
Replace the count with a mask field that lets us choose not only the max
value, but also the minimum value and what values are valid in between.
Suggested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Stable-dep-of: 3aa8628eb78a ("media: uvcvideo: Refactor power_line_frequency_controls_limited")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 6f5aaaf09ee01..32c182987d52c 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -6,6 +6,7 @@
* Laurent Pinchart (laurent.pinchart@xxxxxxxxxxxxxxxx)
*/
+#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -525,7 +526,8 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_BITMASK,
.menu_info = exposure_auto_controls,
- .menu_count = ARRAY_SIZE(exposure_auto_controls),
+ .menu_mask = GENMASK(V4L2_EXPOSURE_APERTURE_PRIORITY,
+ V4L2_EXPOSURE_AUTO),
.slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, },
},
{
@@ -731,7 +733,8 @@ static const struct uvc_control_mapping uvc_ctrl_mappings_uvc11[] = {
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_info = power_line_frequency_controls,
- .menu_count = ARRAY_SIZE(power_line_frequency_controls) - 1,
+ .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
+ V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
},
};
@@ -745,7 +748,8 @@ static const struct uvc_control_mapping uvc_ctrl_mappings_uvc15[] = {
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_info = power_line_frequency_controls,
- .menu_count = ARRAY_SIZE(power_line_frequency_controls),
+ .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
+ V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
},
};
@@ -975,7 +979,9 @@ static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping,
const struct uvc_menu_info *menu = mapping->menu_info;
unsigned int i;
- for (i = 0; i < mapping->menu_count; ++i, ++menu) {
+ for (i = 0; BIT(i) <= mapping->menu_mask; ++i, ++menu) {
+ if (!test_bit(i, &mapping->menu_mask))
+ continue;
if (menu->value == value) {
value = i;
break;
@@ -1209,12 +1215,14 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
switch (mapping->v4l2_type) {
case V4L2_CTRL_TYPE_MENU:
- v4l2_ctrl->minimum = 0;
- v4l2_ctrl->maximum = mapping->menu_count - 1;
+ v4l2_ctrl->minimum = ffs(mapping->menu_mask) - 1;
+ v4l2_ctrl->maximum = fls(mapping->menu_mask) - 1;
v4l2_ctrl->step = 1;
menu = mapping->menu_info;
- for (i = 0; i < mapping->menu_count; ++i, ++menu) {
+ for (i = 0; BIT(i) <= mapping->menu_mask; ++i, ++menu) {
+ if (!test_bit(i, &mapping->menu_mask))
+ continue;
if (menu->value == v4l2_ctrl->default_value) {
v4l2_ctrl->default_value = i;
break;
@@ -1329,7 +1337,7 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
goto done;
}
- if (query_menu->index >= mapping->menu_count) {
+ if (!test_bit(query_menu->index, &mapping->menu_mask)) {
ret = -EINVAL;
goto done;
}
@@ -1837,8 +1845,13 @@ int uvc_ctrl_set(struct uvc_fh *handle,
break;
case V4L2_CTRL_TYPE_MENU:
- if (xctrl->value < 0 || xctrl->value >= mapping->menu_count)
+ if (xctrl->value < (ffs(mapping->menu_mask) - 1) ||
+ xctrl->value > (fls(mapping->menu_mask) - 1))
return -ERANGE;
+
+ if (!test_bit(xctrl->value, &mapping->menu_mask))
+ return -EINVAL;
+
value = mapping->menu_info[xctrl->value].value;
/*
@@ -2277,7 +2290,7 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
INIT_LIST_HEAD(&map->ev_subs);
- size = sizeof(*mapping->menu_info) * mapping->menu_count;
+ size = sizeof(*mapping->menu_info) * fls(mapping->menu_mask);
map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL);
if (map->menu_info == NULL) {
kfree(map->name);
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 215fb483efb00..d6dcd78b434ac 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -7,6 +7,7 @@
*/
#include <linux/atomic.h>
+#include <linux/bits.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/list.h>
@@ -2387,7 +2388,8 @@ static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = {
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_info = power_line_frequency_controls_limited,
- .menu_count = ARRAY_SIZE(power_line_frequency_controls_limited),
+ .menu_mask =
+ GENMASK(ARRAY_SIZE(power_line_frequency_controls_limited) - 1, 0),
};
static const struct uvc_device_info uvc_ctrl_power_line_limited = {
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 3edb54c086b24..0774a11360c03 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -6,6 +6,7 @@
* Laurent Pinchart (laurent.pinchart@xxxxxxxxxxxxxxxx)
*/
+#include <linux/bits.h>
#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/list.h>
@@ -80,7 +81,7 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
goto free_map;
}
- map->menu_count = xmap->menu_count;
+ map->menu_mask = GENMASK(xmap->menu_count - 1, 0);
break;
default:
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index a151f583cd156..f75e5864bbf72 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -117,7 +117,7 @@ struct uvc_control_mapping {
u32 data_type;
const struct uvc_menu_info *menu_info;
- u32 menu_count;
+ unsigned long menu_mask;
u32 master_id;
s32 master_manual;
