diff options
Diffstat (limited to 'drivers/media/video/uvc/uvc_ctrl.c')
| -rw-r--r-- | drivers/media/video/uvc/uvc_ctrl.c | 330 |
1 files changed, 281 insertions, 49 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c index 0efd3b10b35..af26bbe6f76 100644 --- a/drivers/media/video/uvc/uvc_ctrl.c +++ b/drivers/media/video/uvc/uvc_ctrl.c @@ -21,6 +21,7 @@ #include <linux/vmalloc.h> #include <linux/wait.h> #include <linux/atomic.h> +#include <media/v4l2-ctrls.h> #include "uvcvideo.h" @@ -420,6 +421,8 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, + .master_id = V4L2_CID_HUE_AUTO, + .master_manual = 0, }, { .id = V4L2_CID_SATURATION, @@ -492,6 +495,7 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + .slave_ids = { V4L2_CID_HUE, }, }, { .id = V4L2_CID_EXPOSURE_AUTO, @@ -504,6 +508,7 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .data_type = UVC_CTRL_DATA_TYPE_BITMASK, .menu_info = exposure_auto_controls, .menu_count = ARRAY_SIZE(exposure_auto_controls), + .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, }, { .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, @@ -524,6 +529,8 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + .master_id = V4L2_CID_EXPOSURE_AUTO, + .master_manual = V4L2_EXPOSURE_MANUAL, }, { .id = V4L2_CID_AUTO_WHITE_BALANCE, @@ -534,6 +541,7 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + .slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, }, }, { .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, @@ -544,6 +552,8 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + .master_id = V4L2_CID_AUTO_WHITE_BALANCE, + .master_manual = 0, }, { .id = V4L2_CID_AUTO_WHITE_BALANCE, @@ -554,6 +564,8 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + .slave_ids = { V4L2_CID_BLUE_BALANCE, + V4L2_CID_RED_BALANCE }, }, { .id = V4L2_CID_BLUE_BALANCE, @@ -564,6 +576,8 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, + .master_id = V4L2_CID_AUTO_WHITE_BALANCE, + .master_manual = 0, }, { .id = V4L2_CID_RED_BALANCE, @@ -574,6 +588,8 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 16, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, + .master_id = V4L2_CID_AUTO_WHITE_BALANCE, + .master_manual = 0, }, { .id = V4L2_CID_FOCUS_ABSOLUTE, @@ -584,6 +600,8 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + .master_id = V4L2_CID_FOCUS_AUTO, + .master_manual = 0, }, { .id = V4L2_CID_FOCUS_AUTO, @@ -594,6 +612,7 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + .slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, }, }, { .id = V4L2_CID_IRIS_ABSOLUTE, @@ -899,25 +918,54 @@ static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, return 0; } -int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, - struct v4l2_queryctrl *v4l2_ctrl) +static int __uvc_ctrl_get(struct uvc_video_chain *chain, + struct uvc_control *ctrl, struct uvc_control_mapping *mapping, + s32 *value) { - struct uvc_control *ctrl; - struct uvc_control_mapping *mapping; struct uvc_menu_info *menu; unsigned int i; int ret; - ret = mutex_lock_interruptible(&chain->ctrl_mutex); - if (ret < 0) - return -ERESTARTSYS; + if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) + return -EINVAL; - ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); - if (ctrl == NULL) { - ret = -EINVAL; - goto done; + if (!ctrl->loaded) { + ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, + chain->dev->intfnum, ctrl->info.selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + ctrl->info.size); + if (ret < 0) + return ret; + + ctrl->loaded = 1; } + *value = mapping->get(mapping, UVC_GET_CUR, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); + + if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { + menu = mapping->menu_info; + for (i = 0; i < mapping->menu_count; ++i, ++menu) { + if (menu->value == *value) { + *value = i; + break; + } + } + } + + return 0; +} + +static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, + struct uvc_control *ctrl, + struct uvc_control_mapping *mapping, + struct v4l2_queryctrl *v4l2_ctrl) +{ + struct uvc_control_mapping *master_map = NULL; + struct uvc_control *master_ctrl = NULL; + struct uvc_menu_info *menu; + unsigned int i; + memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); v4l2_ctrl->id = mapping->id; v4l2_ctrl->type = mapping->v4l2_type; @@ -929,10 +977,23 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + if (mapping->master_id) + __uvc_find_control(ctrl->entity, mapping->master_id, + &master_map, &master_ctrl, 0); + if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) { + s32 val; + int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); + if (ret < 0) + return ret; + + if (val != mapping->master_manual) + v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; + } + if (!ctrl->cached) { - ret = uvc_ctrl_populate_cache(chain, ctrl); + int ret = uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) - goto done; + return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { @@ -954,19 +1015,19 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, } } - goto done; + return 0; case V4L2_CTRL_TYPE_BOOLEAN: v4l2_ctrl->minimum = 0; v4l2_ctrl->maximum = 1; v4l2_ctrl->step = 1; - goto done; + return 0; case V4L2_CTRL_TYPE_BUTTON: v4l2_ctrl->minimum = 0; v4l2_ctrl->maximum = 0; v4l2_ctrl->step = 0; - goto done; + return 0; default: break; @@ -984,6 +1045,27 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); + return 0; +} + +int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, + struct v4l2_queryctrl *v4l2_ctrl) +{ + struct uvc_control *ctrl; + struct uvc_control_mapping *mapping; + int ret; + + ret = mutex_lock_interruptible(&chain->ctrl_mutex); + if (ret < 0) + return -ERESTARTSYS; + + ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); + if (ctrl == NULL) { + ret = -EINVAL; + goto done; + } + + ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl); done: mutex_unlock(&chain->ctrl_mutex); return ret; @@ -1054,6 +1136,174 @@ done: return ret; } +/* -------------------------------------------------------------------------- + * Ctrl event handling + */ + +static void uvc_ctrl_fill_event(struct uvc_video_chain *chain, + struct v4l2_event *ev, + struct uvc_control *ctrl, + struct uvc_control_mapping *mapping, + s32 value, u32 changes) +{ + struct v4l2_queryctrl v4l2_ctrl; + + __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl); + + memset(ev->reserved, 0, sizeof(ev->reserved)); + ev->type = V4L2_EVENT_CTRL; + ev->id = v4l2_ctrl.id; + ev->u.ctrl.value = value; + ev->u.ctrl.changes = changes; + ev->u.ctrl.type = v4l2_ctrl.type; + ev->u.ctrl.flags = v4l2_ctrl.flags; + ev->u.ctrl.minimum = v4l2_ctrl.minimum; + ev->u.ctrl.maximum = v4l2_ctrl.maximum; + ev->u.ctrl.step = v4l2_ctrl.step; + ev->u.ctrl.default_value = v4l2_ctrl.default_value; +} + +static void uvc_ctrl_send_event(struct uvc_fh *handle, + struct uvc_control *ctrl, struct uvc_control_mapping *mapping, + s32 value, u32 changes) +{ + struct v4l2_subscribed_event *sev; + struct v4l2_event ev; + + if (list_empty(&mapping->ev_subs)) + return; + + uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, value, changes); + + list_for_each_entry(sev, &mapping->ev_subs, node) { + if (sev->fh && (sev->fh != &handle->vfh || + (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) || + (changes & V4L2_EVENT_CTRL_CH_FLAGS))) + v4l2_event_queue_fh(sev->fh, &ev); + } +} + +static void uvc_ctrl_send_slave_event(struct uvc_fh *handle, + struct uvc_control *master, u32 slave_id, + const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) +{ + struct uvc_control_mapping *mapping = NULL; + struct uvc_control *ctrl = NULL; + u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; + unsigned int i; + s32 val = 0; + + /* + * We can skip sending an event for the slave if the slave + * is being modified in the same transaction. + */ + for (i = 0; i < xctrls_count; i++) { + if (xctrls[i].id == slave_id) + return; + } + + __uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0); + if (ctrl == NULL) + return; + + if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) + changes |= V4L2_EVENT_CTRL_CH_VALUE; + + uvc_ctrl_send_event(handle, ctrl, mapping, val, changes); +} + +static void uvc_ctrl_send_events(struct uvc_fh *handle, + const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) +{ + struct uvc_control_mapping *mapping; + struct uvc_control *ctrl; + u32 changes = V4L2_EVENT_CTRL_CH_VALUE; + unsigned int i; + unsigned int j; + + for (i = 0; i < xctrls_count; ++i) { + ctrl = uvc_find_control(handle->chain, xctrls[i].id, &mapping); + + for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) { + if (!mapping->slave_ids[j]) + break; + uvc_ctrl_send_slave_event(handle, ctrl, + mapping->slave_ids[j], + xctrls, xctrls_count); + } + + /* + * If the master is being modified in the same transaction + * flags may change too. + */ + if (mapping->master_id) { + for (j = 0; j < xctrls_count; j++) { + if (xctrls[j].id == mapping->master_id) { + changes |= V4L2_EVENT_CTRL_CH_FLAGS; + break; + } + } + } + + uvc_ctrl_send_event(handle, ctrl, mapping, xctrls[i].value, + changes); + } +} + +static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) +{ + struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); + struct uvc_control_mapping *mapping; + struct uvc_control *ctrl; + int ret; + + ret = mutex_lock_interruptible(&handle->chain->ctrl_mutex); + if (ret < 0) + return -ERESTARTSYS; + + ctrl = uvc_find_control(handle->chain, sev->id, &mapping); + if (ctrl == NULL) { + ret = -EINVAL; + goto done; + } + + list_add_tail(&sev->node, &mapping->ev_subs); + if (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL) { + struct v4l2_event ev; + u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; + s32 val = 0; + + if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) + changes |= V4L2_EVENT_CTRL_CH_VALUE; + + uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, + changes); + /* Mark the queue as active, allowing this initial + event to be accepted. */ + sev->elems = elems; + v4l2_event_queue_fh(sev->fh, &ev); + } + +done: + mutex_unlock(&handle->chain->ctrl_mutex); + return ret; +} + +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); + list_del(&sev->node); + mutex_unlock(&handle->chain->ctrl_mutex); +} + +const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops = { + .add = uvc_ctrl_add_event, + .del = uvc_ctrl_del_event, + .replace = v4l2_ctrl_replace, + .merge = v4l2_ctrl_merge, +}; /* -------------------------------------------------------------------------- * Control transactions @@ -1101,9 +1351,12 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, /* Reset the loaded flag for auto-update controls that were * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent - * uvc_ctrl_get from using the cached value. + * uvc_ctrl_get from using the cached value, and for write-only + * controls to prevent uvc_ctrl_set from setting bits not + * explicitly set by the user. */ - if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE) + if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE || + !(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) ctrl->loaded = 0; if (!ctrl->dirty) @@ -1131,8 +1384,11 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, return 0; } -int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback) +int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, + const struct v4l2_ext_control *xctrls, + unsigned int xctrls_count) { + struct uvc_video_chain *chain = handle->chain; struct uvc_entity *entity; int ret = 0; @@ -1143,6 +1399,8 @@ int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback) goto done; } + if (!rollback) + uvc_ctrl_send_events(handle, xctrls, xctrls_count); done: mutex_unlock(&chain->ctrl_mutex); return ret; @@ -1153,39 +1411,12 @@ int uvc_ctrl_get(struct uvc_video_chain *chain, { struct uvc_control *ctrl; struct uvc_control_mapping *mapping; - struct uvc_menu_info *menu; - unsigned int i; - int ret; ctrl = uvc_find_control(chain, xctrl->id, &mapping); - if (ctrl == NULL || (ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) + if (ctrl == NULL) return -EINVAL; - if (!ctrl->loaded) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, - chain->dev->intfnum, ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - if (ret < 0) - return ret; - - ctrl->loaded = 1; - } - - xctrl->value = mapping->get(mapping, UVC_GET_CUR, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); - - if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { - menu = mapping->menu_info; - for (i = 0; i < mapping->menu_count; ++i, ++menu) { - if (menu->value == xctrl->value) { - xctrl->value = i; - break; - } - } - } - - return 0; + return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); } int uvc_ctrl_set(struct uvc_video_chain *chain, @@ -1641,6 +1872,8 @@ static int __uvc_ctrl_add_mapping(struct uvc_device *dev, if (map == NULL) return -ENOMEM; + INIT_LIST_HEAD(&map->ev_subs); + size = sizeof(*mapping->menu_info) * mapping->menu_count; map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); if (map->menu_info == NULL) { @@ -1653,7 +1886,6 @@ static int __uvc_ctrl_add_mapping(struct uvc_device *dev, if (map->set == NULL) map->set = uvc_set_le_value; - map->ctrl = &ctrl->info; list_add_tail(&map->list, &ctrl->info.mappings); uvc_trace(UVC_TRACE_CONTROL, "Adding mapping '%s' to control %pUl/%u.\n", |