Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-09 06:33:34 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

usb: gadget: uvc: Make color matching attributes read/write

Browse Source 
In preparation for allowing more than the default color matching
descriptor, make the color matching attributes writeable.

Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Link: https://lore.kernel.org/r/20230202114142.300858-6-dan.scally@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daniel Scally 2023-02-02 11:41:41 +00:00 committed by Greg Kroah-Hartman
parent 4e8a720e2e
commit 58f227871f
2 changed files with 39 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/ABI/testing/configfs-usb-gadget-uvc
View File

@ -167,7 +167,7 @@ Date: Dec 2014
KernelVersion: 4.0
Description: Default color matching descriptors
All attributes read only:
All attributes read/write:
======================== ======================================
bMatrixCoefficients matrix used to compute luma and

39
drivers/usb/gadget/function/uvc_configfs.c
View File

@ -1904,7 +1904,44 @@ static ssize_t uvcg_color_matching_##cname##_show( \
return result; \
} \
\
UVC_ATTR_RO(uvcg_color_matching_, cname, aname)
static ssize_t uvcg_color_matching_##cname##_store( \
struct config_item *item, const char *page, size_t len) \
{ \
struct config_group *group = to_config_group(item); \
struct mutex *su_mutex = &group->cg_subsys->su_mutex; \
struct uvcg_color_matching *color_match = \
to_uvcg_color_matching(group); \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
int ret; \
u##bits num; \
\
ret = kstrtou##bits(page, 0, &num); \
if (ret) \
return ret; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
if (color_match->refcnt) { \
ret = -EBUSY; \
goto unlock_su; \
} \
\
opts_item = group->cg_item.ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
\
color_match->desc.aname = num; \
ret = len; \
\
mutex_unlock(&opts->lock); \
unlock_su: \
mutex_unlock(su_mutex); \
\
return ret; \
} \
UVC_ATTR(uvcg_color_matching_, cname, aname)
UVCG_COLOR_MATCHING_ATTR(b_color_primaries, bColorPrimaries, 8);
UVCG_COLOR_MATCHING_ATTR(b_transfer_characteristics, bTransferCharacteristics, 8);