media: uvcvideo: Use control names from framework

The framework already contains a map of IDs to names, lets use it when
possible.

Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Suggested-by: Hans Verkuil <hverkuil@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>

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 7c1d717..2cc2ff0 100644 (file)
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -432,7 +432,6 @@ static void uvc_ctrl_set_rel_speed(struct uvc_control_mapping *mapping,
 static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        {
                .id             = V4L2_CID_BRIGHTNESS,
-               .name           = "Brightness",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_BRIGHTNESS_CONTROL,
                .size           = 16,
@@ -442,7 +441,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_CONTRAST,
-               .name           = "Contrast",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_CONTRAST_CONTROL,
                .size           = 16,
@@ -452,7 +450,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_HUE,
-               .name           = "Hue",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_HUE_CONTROL,
                .size           = 16,
@@ -464,7 +461,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_SATURATION,
-               .name           = "Saturation",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_SATURATION_CONTROL,
                .size           = 16,
@@ -474,7 +470,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_SHARPNESS,
-               .name           = "Sharpness",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_SHARPNESS_CONTROL,
                .size           = 16,
@@ -484,7 +479,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_GAMMA,
-               .name           = "Gamma",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_GAMMA_CONTROL,
                .size           = 16,
@@ -494,7 +488,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_BACKLIGHT_COMPENSATION,
-               .name           = "Backlight Compensation",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
                .size           = 16,
@@ -504,7 +497,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_GAIN,
-               .name           = "Gain",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_GAIN_CONTROL,
                .size           = 16,
@@ -514,7 +506,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_POWER_LINE_FREQUENCY,
-               .name           = "Power Line Frequency",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
                .size           = 2,
@@ -526,7 +517,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_HUE_AUTO,
-               .name           = "Hue, Auto",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_HUE_AUTO_CONTROL,
                .size           = 1,
@@ -537,7 +527,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_EXPOSURE_AUTO,
-               .name           = "Exposure, Auto",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_AE_MODE_CONTROL,
                .size           = 4,
@@ -550,7 +539,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_EXPOSURE_AUTO_PRIORITY,
-               .name           = "Exposure, Auto Priority",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_AE_PRIORITY_CONTROL,
                .size           = 1,
@@ -560,7 +548,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_EXPOSURE_ABSOLUTE,
-               .name           = "Exposure (Absolute)",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
                .size           = 32,
@@ -572,7 +559,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_AUTO_WHITE_BALANCE,
-               .name           = "White Balance Temperature, Auto",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
                .size           = 1,
@@ -583,7 +569,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
-               .name           = "White Balance Temperature",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
                .size           = 16,
@@ -595,7 +580,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_AUTO_WHITE_BALANCE,
-               .name           = "White Balance Component, Auto",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
                .size           = 1,
@@ -607,7 +591,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_BLUE_BALANCE,
-               .name           = "White Balance Blue Component",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
                .size           = 16,
@@ -619,7 +602,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_RED_BALANCE,
-               .name           = "White Balance Red Component",
                .entity         = UVC_GUID_UVC_PROCESSING,
                .selector       = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
                .size           = 16,
@@ -631,7 +613,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_FOCUS_ABSOLUTE,
-               .name           = "Focus (absolute)",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
                .size           = 16,
@@ -643,7 +624,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_FOCUS_AUTO,
-               .name           = "Focus, Auto",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_FOCUS_AUTO_CONTROL,
                .size           = 1,
@@ -654,7 +634,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_IRIS_ABSOLUTE,
-               .name           = "Iris, Absolute",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_IRIS_ABSOLUTE_CONTROL,
                .size           = 16,
@@ -664,7 +643,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_IRIS_RELATIVE,
-               .name           = "Iris, Relative",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_IRIS_RELATIVE_CONTROL,
                .size           = 8,
@@ -674,7 +652,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_ZOOM_ABSOLUTE,
-               .name           = "Zoom, Absolute",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
                .size           = 16,
@@ -684,7 +661,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_ZOOM_CONTINUOUS,
-               .name           = "Zoom, Continuous",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_ZOOM_RELATIVE_CONTROL,
                .size           = 0,
@@ -696,7 +672,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_PAN_ABSOLUTE,
-               .name           = "Pan (Absolute)",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
                .size           = 32,
@@ -706,7 +681,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_TILT_ABSOLUTE,
-               .name           = "Tilt (Absolute)",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
                .size           = 32,
@@ -716,7 +690,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_PAN_SPEED,
-               .name           = "Pan (Speed)",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_PANTILT_RELATIVE_CONTROL,
                .size           = 16,
@@ -728,7 +701,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_TILT_SPEED,
-               .name           = "Tilt (Speed)",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_PANTILT_RELATIVE_CONTROL,
                .size           = 16,
@@ -740,7 +712,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_PRIVACY,
-               .name           = "Privacy",
                .entity         = UVC_GUID_UVC_CAMERA,
                .selector       = UVC_CT_PRIVACY_CONTROL,
                .size           = 1,
@@ -750,7 +721,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
        },
        {
                .id             = V4L2_CID_PRIVACY,
-               .name           = "Privacy",
                .entity         = UVC_GUID_EXT_GPIO_CONTROLLER,
                .selector       = UVC_CT_PRIVACY_CONTROL,
                .size           = 1,
@@ -1072,6 +1042,20 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
        return 0;
 }
 
+static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
+{
+       const char *name;
+
+       if (map->name)
+               return map->name;
+
+       name = v4l2_ctrl_get_name(map->id);
+       if (name)
+               return name;
+
+       return "Unknown Control";
+}
+
 static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
        struct uvc_control *ctrl,
        struct uvc_control_mapping *mapping,
@@ -1085,7 +1069,8 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
        memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl));
        v4l2_ctrl->id = mapping->id;
        v4l2_ctrl->type = mapping->v4l2_type;
-       strscpy(v4l2_ctrl->name, mapping->name, sizeof(v4l2_ctrl->name));
+       strscpy(v4l2_ctrl->name, uvc_map_get_name(mapping),
+               sizeof(v4l2_ctrl->name));
        v4l2_ctrl->flags = 0;
 
        if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
@@ -2177,7 +2162,8 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 
        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);
+               uvc_map_get_name(map), ctrl->info.entity,
+               ctrl->info.selector);
 
        return 0;
 }
@@ -2195,7 +2181,7 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
        if (mapping->id & ~V4L2_CTRL_ID_MASK) {
                uvc_dbg(dev, CONTROL,
                        "Can't add mapping '%s', control id 0x%08x is invalid\n",
-                       mapping->name, mapping->id);
+                       uvc_map_get_name(mapping), mapping->id);
                return -EINVAL;
        }
 
@@ -2242,7 +2228,7 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
                if (mapping->id == map->id) {
                        uvc_dbg(dev, CONTROL,
                                "Can't add mapping '%s', control id 0x%08x already exists\n",
-                               mapping->name, mapping->id);
+                               uvc_map_get_name(mapping), mapping->id);
                        ret = -EEXIST;
                        goto done;
                }
@@ -2253,7 +2239,7 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
                atomic_dec(&dev->nmappings);
                uvc_dbg(dev, CONTROL,
                        "Can't add mapping '%s', maximum mappings count (%u) exceeded\n",
-                       mapping->name, UVC_MAX_CONTROL_MAPPINGS);
+                       uvc_map_get_name(mapping), UVC_MAX_CONTROL_MAPPINGS);
                ret = -ENOMEM;
                goto done;
        }
@@ -2462,6 +2448,7 @@ static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev,
        list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) {
                list_del(&mapping->list);
                kfree(mapping->menu_info);
+               kfree(mapping->name);
                kfree(mapping);
        }
 }

diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 1597435..c6ec7dc 100644 (file)
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -40,7 +40,13 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
                return -ENOMEM;
 
        map->id = xmap->id;
-       memcpy(map->name, xmap->name, sizeof(map->name));
+       /* Non standard control id. */
+       if (v4l2_ctrl_get_name(map->id) == NULL) {
+               map->name = kmemdup(xmap->name, sizeof(xmap->name),
+                                   GFP_KERNEL);
+               if (!map->name)
+                       return -ENOMEM;
+       }
        memcpy(map->entity, xmap->entity, sizeof(map->entity));
        map->selector = xmap->selector;
        map->size = xmap->size;

diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 37a092d..b044d94 100644 (file)
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -241,7 +241,7 @@ struct uvc_control_mapping {
        struct list_head ev_subs;
 
        u32 id;
-       u8 name[32];
+       char *name;
        u8 entity[16];
        u8 selector;