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authorDaniel Scally <dan.scally@ideasonboard.com>2023-02-02 14:41:41 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-02-06 15:46:43 +0300
commit58f227871f798825ba44d149d578e8ffbd0d3d6d (patch)
treef420ee98ab8cd45a2e766f319d039d0d120c5c5a /drivers/usb
parent4e8a720e2ed24324d2e84daad86874c47c3cbd4d (diff)
downloadlinux-58f227871f798825ba44d149d578e8ffbd0d3d6d.tar.xz
usb: gadget: uvc: Make color matching attributes read/write
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/function/uvc_configfs.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c
index 56e23b80d63f..a210b1990080 100644
--- a/drivers/usb/gadget/function/uvc_configfs.c
+++ b/drivers/usb/gadget/function/uvc_configfs.c
@@ -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);