tpg_s_field
tpg_s_field(&vsensor->tpg, format->field, false);
tpg_s_field(&ctx->tpg, f->field, false);
tpg_s_field(tpg, buf->vb.field,
tpg_s_field(&dev->tpg, V4L2_FIELD_TOP, true);
tpg_s_field(&dev->tpg, dev->field_cap, false);