| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hans Verkuil | 9489 | 77.28% | 23 | 40.35% |
| Daniel Almeida | 1321 | 10.76% | 1 | 1.75% |
| Andrzej Pietrasiewicz | 823 | 6.70% | 1 | 1.75% |
| Jacopo Mondi | 216 | 1.76% | 2 | 3.51% |
| Paul Kocialkowski | 138 | 1.12% | 2 | 3.51% |
| Benjamin Gaignard | 100 | 0.81% | 4 | 7.02% |
| Sylwester Nawrocki | 39 | 0.32% | 2 | 3.51% |
| Yunfei Dong | 33 | 0.27% | 1 | 1.75% |
| Xavier Roumegue | 29 | 0.24% | 1 | 1.75% |
| Nicolas Dufresne | 22 | 0.18% | 1 | 1.75% |
| Sakari Ailus | 20 | 0.16% | 4 | 7.02% |
| Ezequiel García | 12 | 0.10% | 2 | 3.51% |
| Arnd Bergmann | 8 | 0.07% | 1 | 1.75% |
| Antoine Jacquet | 6 | 0.05% | 1 | 1.75% |
| Stanimir Varbanov | 5 | 0.04% | 1 | 1.75% |
| Dafna Hirschfeld | 4 | 0.03% | 1 | 1.75% |
| Paul Gortmaker | 2 | 0.02% | 1 | 1.75% |
| Randy Dunlap | 2 | 0.02% | 1 | 1.75% |
| Ricardo Ribalda Delgado | 2 | 0.02% | 1 | 1.75% |
| Tomasz Figa | 2 | 0.02% | 1 | 1.75% |
| Hans de Goede | 1 | 0.01% | 1 | 1.75% |
| Thomas Gleixner | 1 | 0.01% | 1 | 1.75% |
| Colin Ian King | 1 | 0.01% | 1 | 1.75% |
| Laurent Pinchart | 1 | 0.01% | 1 | 1.75% |
| Lad Prabhakar | 1 | 0.01% | 1 | 1.75% |
| Total | 12278 | 57 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * V4L2 controls framework core implementation. * * Copyright (C) 2010-2021 Hans Verkuil <hverkuil-cisco@xs4all.nl> */ #include <linux/export.h> #include <linux/mm.h> #include <linux/slab.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-event.h> #include <media/v4l2-fwnode.h> #include "v4l2-ctrls-priv.h" static const union v4l2_ctrl_ptr ptr_null; static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes) { memset(ev, 0, sizeof(*ev)); ev->type = V4L2_EVENT_CTRL; ev->id = ctrl->id; ev->u.ctrl.changes = changes; ev->u.ctrl.type = ctrl->type; ev->u.ctrl.flags = user_flags(ctrl); if (ctrl->is_ptr) ev->u.ctrl.value64 = 0; else ev->u.ctrl.value64 = *ctrl->p_cur.p_s64; ev->u.ctrl.minimum = ctrl->minimum; ev->u.ctrl.maximum = ctrl->maximum; if (ctrl->type == V4L2_CTRL_TYPE_MENU || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU) ev->u.ctrl.step = 1; else ev->u.ctrl.step = ctrl->step; ev->u.ctrl.default_value = ctrl->default_value; } void send_initial_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl) { struct v4l2_event ev; u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)) changes |= V4L2_EVENT_CTRL_CH_VALUE; fill_event(&ev, ctrl, changes); v4l2_event_queue_fh(fh, &ev); } void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes) { struct v4l2_event ev; struct v4l2_subscribed_event *sev; if (list_empty(&ctrl->ev_subs)) return; fill_event(&ev, ctrl, changes); list_for_each_entry(sev, &ctrl->ev_subs, node) if (sev->fh != fh || (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK)) v4l2_event_queue_fh(sev->fh, &ev); } bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2) { unsigned int i; switch (ctrl->type) { case V4L2_CTRL_TYPE_BUTTON: return false; case V4L2_CTRL_TYPE_STRING: for (i = 0; i < ctrl->elems; i++) { unsigned int idx = i * ctrl->elem_size; /* strings are always 0-terminated */ if (strcmp(ptr1.p_char + idx, ptr2.p_char + idx)) return false; } return true; default: return !memcmp(ptr1.p_const, ptr2.p_const, ctrl->elems * ctrl->elem_size); } } EXPORT_SYMBOL(v4l2_ctrl_type_op_equal); /* Default intra MPEG-2 quantisation coefficients, from the specification. */ static const u8 mpeg2_intra_quant_matrix[64] = { 8, 16, 16, 19, 16, 19, 22, 22, 22, 22, 22, 22, 26, 24, 26, 27, 27, 27, 26, 26, 26, 26, 27, 27, 27, 29, 29, 29, 34, 34, 34, 29, 29, 29, 27, 27, 29, 29, 32, 32, 34, 34, 37, 38, 37, 35, 35, 34, 35, 38, 38, 40, 40, 40, 48, 48, 46, 46, 56, 56, 58, 69, 69, 83 }; static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx, union v4l2_ctrl_ptr ptr) { struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence; struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture; struct v4l2_ctrl_mpeg2_quantisation *p_mpeg2_quant; struct v4l2_ctrl_vp8_frame *p_vp8_frame; struct v4l2_ctrl_vp9_frame *p_vp9_frame; struct v4l2_ctrl_fwht_params *p_fwht_params; struct v4l2_ctrl_h264_scaling_matrix *p_h264_scaling_matrix; struct v4l2_ctrl_av1_sequence *p_av1_sequence; void *p = ptr.p + idx * ctrl->elem_size; if (ctrl->p_def.p_const) memcpy(p, ctrl->p_def.p_const, ctrl->elem_size); else memset(p, 0, ctrl->elem_size); switch ((u32)ctrl->type) { case V4L2_CTRL_TYPE_MPEG2_SEQUENCE: p_mpeg2_sequence = p; /* 4:2:0 */ p_mpeg2_sequence->chroma_format = 1; break; case V4L2_CTRL_TYPE_MPEG2_PICTURE: p_mpeg2_picture = p; /* interlaced top field */ p_mpeg2_picture->picture_structure = V4L2_MPEG2_PIC_TOP_FIELD; p_mpeg2_picture->picture_coding_type = V4L2_MPEG2_PIC_CODING_TYPE_I; break; case V4L2_CTRL_TYPE_MPEG2_QUANTISATION: p_mpeg2_quant = p; memcpy(p_mpeg2_quant->intra_quantiser_matrix, mpeg2_intra_quant_matrix, ARRAY_SIZE(mpeg2_intra_quant_matrix)); /* * The default non-intra MPEG-2 quantisation * coefficients are all 16, as per the specification. */ memset(p_mpeg2_quant->non_intra_quantiser_matrix, 16, sizeof(p_mpeg2_quant->non_intra_quantiser_matrix)); break; case V4L2_CTRL_TYPE_VP8_FRAME: p_vp8_frame = p; p_vp8_frame->num_dct_parts = 1; break; case V4L2_CTRL_TYPE_VP9_FRAME: p_vp9_frame = p; p_vp9_frame->profile = 0; p_vp9_frame->bit_depth = 8; p_vp9_frame->flags |= V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING | V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING; break; case V4L2_CTRL_TYPE_AV1_SEQUENCE: p_av1_sequence = p; p_av1_sequence->bit_depth = 8; break; case V4L2_CTRL_TYPE_FWHT_PARAMS: p_fwht_params = p; p_fwht_params->version = V4L2_FWHT_VERSION; p_fwht_params->width = 1280; p_fwht_params->height = 720; p_fwht_params->flags = V4L2_FWHT_FL_PIXENC_YUV | (2 << V4L2_FWHT_FL_COMPONENTS_NUM_OFFSET); break; case V4L2_CTRL_TYPE_H264_SCALING_MATRIX: p_h264_scaling_matrix = p; /* * The default (flat) H.264 scaling matrix when none are * specified in the bitstream, this is according to formulas * (7-8) and (7-9) of the specification. */ memset(p_h264_scaling_matrix, 16, sizeof(*p_h264_scaling_matrix)); break; } } void v4l2_ctrl_type_op_init(const struct v4l2_ctrl *ctrl, u32 from_idx, union v4l2_ctrl_ptr ptr) { unsigned int i; u32 tot_elems = ctrl->elems; u32 elems = tot_elems - from_idx; if (from_idx >= tot_elems) return; switch (ctrl->type) { case V4L2_CTRL_TYPE_STRING: for (i = from_idx; i < tot_elems; i++) { unsigned int offset = i * ctrl->elem_size; memset(ptr.p_char + offset, ' ', ctrl->minimum); ptr.p_char[offset + ctrl->minimum] = '\0'; } break; case V4L2_CTRL_TYPE_INTEGER64: if (ctrl->default_value) { for (i = from_idx; i < tot_elems; i++) ptr.p_s64[i] = ctrl->default_value; } else { memset(ptr.p_s64 + from_idx, 0, elems * sizeof(s64)); } break; case V4L2_CTRL_TYPE_INTEGER: case V4L2_CTRL_TYPE_INTEGER_MENU: case V4L2_CTRL_TYPE_MENU: case V4L2_CTRL_TYPE_BITMASK: case V4L2_CTRL_TYPE_BOOLEAN: if (ctrl->default_value) { for (i = from_idx; i < tot_elems; i++) ptr.p_s32[i] = ctrl->default_value; } else { memset(ptr.p_s32 + from_idx, 0, elems * sizeof(s32)); } break; case V4L2_CTRL_TYPE_BUTTON: case V4L2_CTRL_TYPE_CTRL_CLASS: memset(ptr.p_s32 + from_idx, 0, elems * sizeof(s32)); break; case V4L2_CTRL_TYPE_U8: memset(ptr.p_u8 + from_idx, ctrl->default_value, elems); break; case V4L2_CTRL_TYPE_U16: if (ctrl->default_value) { for (i = from_idx; i < tot_elems; i++) ptr.p_u16[i] = ctrl->default_value; } else { memset(ptr.p_u16 + from_idx, 0, elems * sizeof(u16)); } break; case V4L2_CTRL_TYPE_U32: if (ctrl->default_value) { for (i = from_idx; i < tot_elems; i++) ptr.p_u32[i] = ctrl->default_value; } else { memset(ptr.p_u32 + from_idx, 0, elems * sizeof(u32)); } break; default: for (i = from_idx; i < tot_elems; i++) std_init_compound(ctrl, i, ptr); break; } } EXPORT_SYMBOL(v4l2_ctrl_type_op_init); void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl) { union v4l2_ctrl_ptr ptr = ctrl->p_cur; if (ctrl->is_array) { unsigned i; for (i = 0; i < ctrl->nr_of_dims; i++) pr_cont("[%u]", ctrl->dims[i]); pr_cont(" "); } switch (ctrl->type) { case V4L2_CTRL_TYPE_INTEGER: pr_cont("%d", *ptr.p_s32); break; case V4L2_CTRL_TYPE_BOOLEAN: pr_cont("%s", *ptr.p_s32 ? "true" : "false"); break; case V4L2_CTRL_TYPE_MENU: pr_cont("%s", ctrl->qmenu[*ptr.p_s32]); break; case V4L2_CTRL_TYPE_INTEGER_MENU: pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]); break; case V4L2_CTRL_TYPE_BITMASK: pr_cont("0x%08x", *ptr.p_s32); break; case V4L2_CTRL_TYPE_INTEGER64: pr_cont("%lld", *ptr.p_s64); break; case V4L2_CTRL_TYPE_STRING: pr_cont("%s", ptr.p_char); break; case V4L2_CTRL_TYPE_U8: pr_cont("%u", (unsigned)*ptr.p_u8); break; case V4L2_CTRL_TYPE_U16: pr_cont("%u", (unsigned)*ptr.p_u16); break; case V4L2_CTRL_TYPE_U32: pr_cont("%u", (unsigned)*ptr.p_u32); break; case V4L2_CTRL_TYPE_AREA: pr_cont("%ux%u", ptr.p_area->width, ptr.p_area->height); break; case V4L2_CTRL_TYPE_H264_SPS: pr_cont("H264_SPS"); break; case V4L2_CTRL_TYPE_H264_PPS: pr_cont("H264_PPS"); break; case V4L2_CTRL_TYPE_H264_SCALING_MATRIX: pr_cont("H264_SCALING_MATRIX"); break; case V4L2_CTRL_TYPE_H264_SLICE_PARAMS: pr_cont("H264_SLICE_PARAMS"); break; case V4L2_CTRL_TYPE_H264_DECODE_PARAMS: pr_cont("H264_DECODE_PARAMS"); break; case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS: pr_cont("H264_PRED_WEIGHTS"); break; case V4L2_CTRL_TYPE_FWHT_PARAMS: pr_cont("FWHT_PARAMS"); break; case V4L2_CTRL_TYPE_VP8_FRAME: pr_cont("VP8_FRAME"); break; case V4L2_CTRL_TYPE_HDR10_CLL_INFO: pr_cont("HDR10_CLL_INFO"); break; case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY: pr_cont("HDR10_MASTERING_DISPLAY"); break; case V4L2_CTRL_TYPE_MPEG2_QUANTISATION: pr_cont("MPEG2_QUANTISATION"); break; case V4L2_CTRL_TYPE_MPEG2_SEQUENCE: pr_cont("MPEG2_SEQUENCE"); break; case V4L2_CTRL_TYPE_MPEG2_PICTURE: pr_cont("MPEG2_PICTURE"); break; case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR: pr_cont("VP9_COMPRESSED_HDR"); break; case V4L2_CTRL_TYPE_VP9_FRAME: pr_cont("VP9_FRAME"); break; case V4L2_CTRL_TYPE_HEVC_SPS: pr_cont("HEVC_SPS"); break; case V4L2_CTRL_TYPE_HEVC_PPS: pr_cont("HEVC_PPS"); break; case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS: pr_cont("HEVC_SLICE_PARAMS"); break; case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX: pr_cont("HEVC_SCALING_MATRIX"); break; case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS: pr_cont("HEVC_DECODE_PARAMS"); break; case V4L2_CTRL_TYPE_AV1_SEQUENCE: pr_cont("AV1_SEQUENCE"); break; case V4L2_CTRL_TYPE_AV1_TILE_GROUP_ENTRY: pr_cont("AV1_TILE_GROUP_ENTRY"); break; case V4L2_CTRL_TYPE_AV1_FRAME: pr_cont("AV1_FRAME"); break; case V4L2_CTRL_TYPE_AV1_FILM_GRAIN: pr_cont("AV1_FILM_GRAIN"); break; default: pr_cont("unknown type %d", ctrl->type); break; } } EXPORT_SYMBOL(v4l2_ctrl_type_op_log); /* * Round towards the closest legal value. Be careful when we are * close to the maximum range of the control type to prevent * wrap-arounds. */ #define ROUND_TO_RANGE(val, offset_type, ctrl) \ ({ \ offset_type offset; \ if ((ctrl)->maximum >= 0 && \ val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \ val = (ctrl)->maximum; \ else \ val += (s32)((ctrl)->step / 2); \ val = clamp_t(typeof(val), val, \ (ctrl)->minimum, (ctrl)->maximum); \ offset = (val) - (ctrl)->minimum; \ offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \ val = (ctrl)->minimum + offset; \ 0; \ }) /* Validate a new control */ #define zero_padding(s) \ memset(&(s).padding, 0, sizeof((s).padding)) #define zero_reserved(s) \ memset(&(s).reserved, 0, sizeof((s).reserved)) static int validate_vp9_lf_params(struct v4l2_vp9_loop_filter *lf) { unsigned int i; if (lf->flags & ~(V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED | V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE)) return -EINVAL; /* That all values are in the accepted range. */ if (lf->level > GENMASK(5, 0)) return -EINVAL; if (lf->sharpness > GENMASK(2, 0)) return -EINVAL; for (i = 0; i < ARRAY_SIZE(lf->ref_deltas); i++) if (lf->ref_deltas[i] < -63 || lf->ref_deltas[i] > 63) return -EINVAL; for (i = 0; i < ARRAY_SIZE(lf->mode_deltas); i++) if (lf->mode_deltas[i] < -63 || lf->mode_deltas[i] > 63) return -EINVAL; zero_reserved(*lf); return 0; } static int validate_vp9_quant_params(struct v4l2_vp9_quantization *quant) { if (quant->delta_q_y_dc < -15 || quant->delta_q_y_dc > 15 || quant->delta_q_uv_dc < -15 || quant->delta_q_uv_dc > 15 || quant->delta_q_uv_ac < -15 || quant->delta_q_uv_ac > 15) return -EINVAL; zero_reserved(*quant); return 0; } static int validate_vp9_seg_params(struct v4l2_vp9_segmentation *seg) { unsigned int i, j; if (seg->flags & ~(V4L2_VP9_SEGMENTATION_FLAG_ENABLED | V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP | V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE | V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA | V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE)) return -EINVAL; for (i = 0; i < ARRAY_SIZE(seg->feature_enabled); i++) { if (seg->feature_enabled[i] & ~V4L2_VP9_SEGMENT_FEATURE_ENABLED_MASK) return -EINVAL; } for (i = 0; i < ARRAY_SIZE(seg->feature_data); i++) { static const int range[] = { 255, 63, 3, 0 }; for (j = 0; j < ARRAY_SIZE(seg->feature_data[j]); j++) { if (seg->feature_data[i][j] < -range[j] || seg->feature_data[i][j] > range[j]) return -EINVAL; } } zero_reserved(*seg); return 0; } static int validate_vp9_compressed_hdr(struct v4l2_ctrl_vp9_compressed_hdr *hdr) { if (hdr->tx_mode > V4L2_VP9_TX_MODE_SELECT) return -EINVAL; return 0; } static int validate_vp9_frame(struct v4l2_ctrl_vp9_frame *frame) { int ret; /* Make sure we're not passed invalid flags. */ if (frame->flags & ~(V4L2_VP9_FRAME_FLAG_KEY_FRAME | V4L2_VP9_FRAME_FLAG_SHOW_FRAME | V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT | V4L2_VP9_FRAME_FLAG_INTRA_ONLY | V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV | V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX | V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE | V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING | V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING | V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING)) return -EINVAL; if (frame->flags & V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT && frame->flags & V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX) return -EINVAL; if (frame->profile > V4L2_VP9_PROFILE_MAX) return -EINVAL; if (frame->reset_frame_context > V4L2_VP9_RESET_FRAME_CTX_ALL) return -EINVAL; if (frame->frame_context_idx >= V4L2_VP9_NUM_FRAME_CTX) return -EINVAL; /* * Profiles 0 and 1 only support 8-bit depth, profiles 2 and 3 only 10 * and 12 bit depths. */ if ((frame->profile < 2 && frame->bit_depth != 8) || (frame->profile >= 2 && (frame->bit_depth != 10 && frame->bit_depth != 12))) return -EINVAL; /* Profile 0 and 2 only accept YUV 4:2:0. */ if ((frame->profile == 0 || frame->profile == 2) && (!(frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) || !(frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING))) return -EINVAL; /* Profile 1 and 3 only accept YUV 4:2:2, 4:4:0 and 4:4:4. */ if ((frame->profile == 1 || frame->profile == 3) && ((frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) && (frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING))) return -EINVAL; if (frame->interpolation_filter > V4L2_VP9_INTERP_FILTER_SWITCHABLE) return -EINVAL; /* * According to the spec, tile_cols_log2 shall be less than or equal * to 6. */ if (frame->tile_cols_log2 > 6) return -EINVAL; if (frame->reference_mode > V4L2_VP9_REFERENCE_MODE_SELECT) return -EINVAL; ret = validate_vp9_lf_params(&frame->lf); if (ret) return ret; ret = validate_vp9_quant_params(&frame->quant); if (ret) return ret; ret = validate_vp9_seg_params(&frame->seg); if (ret) return ret; zero_reserved(*frame); return 0; } static int validate_av1_quantization(struct v4l2_av1_quantization *q) { if (q->flags > GENMASK(2, 0)) return -EINVAL; if (q->delta_q_y_dc < -64 || q->delta_q_y_dc > 63 || q->delta_q_u_dc < -64 || q->delta_q_u_dc > 63 || q->delta_q_v_dc < -64 || q->delta_q_v_dc > 63 || q->delta_q_u_ac < -64 || q->delta_q_u_ac > 63 || q->delta_q_v_ac < -64 || q->delta_q_v_ac > 63 || q->delta_q_res > GENMASK(1, 0)) return -EINVAL; if (q->qm_y > GENMASK(3, 0) || q->qm_u > GENMASK(3, 0) || q->qm_v > GENMASK(3, 0)) return -EINVAL; return 0; } static int validate_av1_segmentation(struct v4l2_av1_segmentation *s) { u32 i; u32 j; if (s->flags > GENMASK(4, 0)) return -EINVAL; for (i = 0; i < ARRAY_SIZE(s->feature_data); i++) { static const int segmentation_feature_signed[] = { 1, 1, 1, 1, 1, 0, 0, 0 }; static const int segmentation_feature_max[] = { 255, 63, 63, 63, 63, 7, 0, 0}; for (j = 0; j < ARRAY_SIZE(s->feature_data[j]); j++) { s32 limit = segmentation_feature_max[j]; if (segmentation_feature_signed[j]) { if (s->feature_data[i][j] < -limit || s->feature_data[i][j] > limit) return -EINVAL; } else { if (s->feature_data[i][j] < 0 || s->feature_data[i][j] > limit) return -EINVAL; } } } return 0; } static int validate_av1_loop_filter(struct v4l2_av1_loop_filter *lf) { u32 i; if (lf->flags > GENMASK(3, 0)) return -EINVAL; for (i = 0; i < ARRAY_SIZE(lf->level); i++) { if (lf->level[i] > GENMASK(5, 0)) return -EINVAL; } if (lf->sharpness > GENMASK(2, 0)) return -EINVAL; for (i = 0; i < ARRAY_SIZE(lf->ref_deltas); i++) { if (lf->ref_deltas[i] < -64 || lf->ref_deltas[i] > 63) return -EINVAL; } for (i = 0; i < ARRAY_SIZE(lf->mode_deltas); i++) { if (lf->mode_deltas[i] < -64 || lf->mode_deltas[i] > 63) return -EINVAL; } return 0; } static int validate_av1_cdef(struct v4l2_av1_cdef *cdef) { u32 i; if (cdef->damping_minus_3 > GENMASK(1, 0) || cdef->bits > GENMASK(1, 0)) return -EINVAL; for (i = 0; i < 1 << cdef->bits; i++) { if (cdef->y_pri_strength[i] > GENMASK(3, 0) || cdef->y_sec_strength[i] > 4 || cdef->uv_pri_strength[i] > GENMASK(3, 0) || cdef->uv_sec_strength[i] > 4) return -EINVAL; } return 0; } static int validate_av1_loop_restauration(struct v4l2_av1_loop_restoration *lr) { if (lr->lr_unit_shift > 3 || lr->lr_uv_shift > 1) return -EINVAL; return 0; } static int validate_av1_film_grain(struct v4l2_ctrl_av1_film_grain *fg) { u32 i; if (fg->flags > GENMASK(4, 0)) return -EINVAL; if (fg->film_grain_params_ref_idx > GENMASK(2, 0) || fg->num_y_points > 14 || fg->num_cb_points > 10 || fg->num_cr_points > GENMASK(3, 0) || fg->grain_scaling_minus_8 > GENMASK(1, 0) || fg->ar_coeff_lag > GENMASK(1, 0) || fg->ar_coeff_shift_minus_6 > GENMASK(1, 0) || fg->grain_scale_shift > GENMASK(1, 0)) return -EINVAL; if (!(fg->flags & V4L2_AV1_FILM_GRAIN_FLAG_APPLY_GRAIN)) return 0; for (i = 1; i < fg->num_y_points; i++) if (fg->point_y_value[i] <= fg->point_y_value[i - 1]) return -EINVAL; for (i = 1; i < fg->num_cb_points; i++) if (fg->point_cb_value[i] <= fg->point_cb_value[i - 1]) return -EINVAL; for (i = 1; i < fg->num_cr_points; i++) if (fg->point_cr_value[i] <= fg->point_cr_value[i - 1]) return -EINVAL; return 0; } static int validate_av1_frame(struct v4l2_ctrl_av1_frame *f) { int ret = 0; ret = validate_av1_quantization(&f->quantization); if (ret) return ret; ret = validate_av1_segmentation(&f->segmentation); if (ret) return ret; ret = validate_av1_loop_filter(&f->loop_filter); if (ret) return ret; ret = validate_av1_cdef(&f->cdef); if (ret) return ret; ret = validate_av1_loop_restauration(&f->loop_restoration); if (ret) return ret; if (f->flags & ~(V4L2_AV1_FRAME_FLAG_SHOW_FRAME | V4L2_AV1_FRAME_FLAG_SHOWABLE_FRAME | V4L2_AV1_FRAME_FLAG_ERROR_RESILIENT_MODE | V4L2_AV1_FRAME_FLAG_DISABLE_CDF_UPDATE | V4L2_AV1_FRAME_FLAG_ALLOW_SCREEN_CONTENT_TOOLS | V4L2_AV1_FRAME_FLAG_FORCE_INTEGER_MV | V4L2_AV1_FRAME_FLAG_ALLOW_INTRABC | V4L2_AV1_FRAME_FLAG_USE_SUPERRES | V4L2_AV1_FRAME_FLAG_ALLOW_HIGH_PRECISION_MV | V4L2_AV1_FRAME_FLAG_IS_MOTION_MODE_SWITCHABLE | V4L2_AV1_FRAME_FLAG_USE_REF_FRAME_MVS | V4L2_AV1_FRAME_FLAG_DISABLE_FRAME_END_UPDATE_CDF | V4L2_AV1_FRAME_FLAG_ALLOW_WARPED_MOTION | V4L2_AV1_FRAME_FLAG_REFERENCE_SELECT | V4L2_AV1_FRAME_FLAG_REDUCED_TX_SET | V4L2_AV1_FRAME_FLAG_SKIP_MODE_ALLOWED | V4L2_AV1_FRAME_FLAG_SKIP_MODE_PRESENT | V4L2_AV1_FRAME_FLAG_FRAME_SIZE_OVERRIDE | V4L2_AV1_FRAME_FLAG_BUFFER_REMOVAL_TIME_PRESENT | V4L2_AV1_FRAME_FLAG_FRAME_REFS_SHORT_SIGNALING)) return -EINVAL; if (f->superres_denom > GENMASK(2, 0) + 9) return -EINVAL; return 0; } static int validate_av1_sequence(struct v4l2_ctrl_av1_sequence *s) { if (s->flags & ~(V4L2_AV1_SEQUENCE_FLAG_STILL_PICTURE | V4L2_AV1_SEQUENCE_FLAG_USE_128X128_SUPERBLOCK | V4L2_AV1_SEQUENCE_FLAG_ENABLE_FILTER_INTRA | V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTRA_EDGE_FILTER | V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTERINTRA_COMPOUND | V4L2_AV1_SEQUENCE_FLAG_ENABLE_MASKED_COMPOUND | V4L2_AV1_SEQUENCE_FLAG_ENABLE_WARPED_MOTION | V4L2_AV1_SEQUENCE_FLAG_ENABLE_DUAL_FILTER | V4L2_AV1_SEQUENCE_FLAG_ENABLE_ORDER_HINT | V4L2_AV1_SEQUENCE_FLAG_ENABLE_JNT_COMP | V4L2_AV1_SEQUENCE_FLAG_ENABLE_REF_FRAME_MVS | V4L2_AV1_SEQUENCE_FLAG_ENABLE_SUPERRES | V4L2_AV1_SEQUENCE_FLAG_ENABLE_CDEF | V4L2_AV1_SEQUENCE_FLAG_ENABLE_RESTORATION | V4L2_AV1_SEQUENCE_FLAG_MONO_CHROME | V4L2_AV1_SEQUENCE_FLAG_COLOR_RANGE | V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_X | V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_Y | V4L2_AV1_SEQUENCE_FLAG_FILM_GRAIN_PARAMS_PRESENT | V4L2_AV1_SEQUENCE_FLAG_SEPARATE_UV_DELTA_Q)) return -EINVAL; if (s->seq_profile == 1 && s->flags & V4L2_AV1_SEQUENCE_FLAG_MONO_CHROME) return -EINVAL; /* reserved */ if (s->seq_profile > 2) return -EINVAL; /* TODO: PROFILES */ return 0; } /* * Compound controls validation requires setting unused fields/flags to zero * in order to properly detect unchanged controls with v4l2_ctrl_type_op_equal's * memcmp. */ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx, union v4l2_ctrl_ptr ptr) { struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence; struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture; struct v4l2_ctrl_vp8_frame *p_vp8_frame; struct v4l2_ctrl_fwht_params *p_fwht_params; struct v4l2_ctrl_h264_sps *p_h264_sps; struct v4l2_ctrl_h264_pps *p_h264_pps; struct v4l2_ctrl_h264_pred_weights *p_h264_pred_weights; struct v4l2_ctrl_h264_slice_params *p_h264_slice_params; struct v4l2_ctrl_h264_decode_params *p_h264_dec_params; struct v4l2_ctrl_hevc_sps *p_hevc_sps; struct v4l2_ctrl_hevc_pps *p_hevc_pps; struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering; struct v4l2_ctrl_hevc_decode_params *p_hevc_decode_params; struct v4l2_area *area; void *p = ptr.p + idx * ctrl->elem_size; unsigned int i; switch ((u32)ctrl->type) { case V4L2_CTRL_TYPE_MPEG2_SEQUENCE: p_mpeg2_sequence = p; switch (p_mpeg2_sequence->chroma_format) { case 1: /* 4:2:0 */ case 2: /* 4:2:2 */ case 3: /* 4:4:4 */ break; default: return -EINVAL; } break; case V4L2_CTRL_TYPE_MPEG2_PICTURE: p_mpeg2_picture = p; switch (p_mpeg2_picture->intra_dc_precision) { case 0: /* 8 bits */ case 1: /* 9 bits */ case 2: /* 10 bits */ case 3: /* 11 bits */ break; default: return -EINVAL; } switch (p_mpeg2_picture->picture_structure) { case V4L2_MPEG2_PIC_TOP_FIELD: case V4L2_MPEG2_PIC_BOTTOM_FIELD: case V4L2_MPEG2_PIC_FRAME: break; default: return -EINVAL; } switch (p_mpeg2_picture->picture_coding_type) { case V4L2_MPEG2_PIC_CODING_TYPE_I: case V4L2_MPEG2_PIC_CODING_TYPE_P: case V4L2_MPEG2_PIC_CODING_TYPE_B: break; default: return -EINVAL; } zero_reserved(*p_mpeg2_picture); break; case V4L2_CTRL_TYPE_MPEG2_QUANTISATION: break; case V4L2_CTRL_TYPE_FWHT_PARAMS: p_fwht_params = p; if (p_fwht_params->version < V4L2_FWHT_VERSION) return -EINVAL; if (!p_fwht_params->width || !p_fwht_params->height) return -EINVAL; break; case V4L2_CTRL_TYPE_H264_SPS: p_h264_sps = p; /* Some syntax elements are only conditionally valid */ if (p_h264_sps->pic_order_cnt_type != 0) { p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 = 0; } else if (p_h264_sps->pic_order_cnt_type != 1) { p_h264_sps->num_ref_frames_in_pic_order_cnt_cycle = 0; p_h264_sps->offset_for_non_ref_pic = 0; p_h264_sps->offset_for_top_to_bottom_field = 0; memset(&p_h264_sps->offset_for_ref_frame, 0, sizeof(p_h264_sps->offset_for_ref_frame)); } if (!V4L2_H264_SPS_HAS_CHROMA_FORMAT(p_h264_sps)) { p_h264_sps->chroma_format_idc = 1; p_h264_sps->bit_depth_luma_minus8 = 0; p_h264_sps->bit_depth_chroma_minus8 = 0; p_h264_sps->flags &= ~V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS; if (p_h264_sps->chroma_format_idc < 3) p_h264_sps->flags &= ~V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE; } if (p_h264_sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY) p_h264_sps->flags &= ~V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD; /* * Chroma 4:2:2 format require at least High 4:2:2 profile. * * The H264 specification and well-known parser implementations * use profile-idc values directly, as that is clearer and * less ambiguous. We do the same here. */ if (p_h264_sps->profile_idc < 122 && p_h264_sps->chroma_format_idc > 1) return -EINVAL; /* Chroma 4:4:4 format require at least High 4:2:2 profile */ if (p_h264_sps->profile_idc < 244 && p_h264_sps->chroma_format_idc > 2) return -EINVAL; if (p_h264_sps->chroma_format_idc > 3) return -EINVAL; if (p_h264_sps->bit_depth_luma_minus8 > 6) return -EINVAL; if (p_h264_sps->bit_depth_chroma_minus8 > 6) return -EINVAL; if (p_h264_sps->log2_max_frame_num_minus4 > 12) return -EINVAL; if (p_h264_sps->pic_order_cnt_type > 2) return -EINVAL; if (p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 > 12) return -EINVAL; if (p_h264_sps->max_num_ref_frames > V4L2_H264_REF_LIST_LEN) return -EINVAL; break; case V4L2_CTRL_TYPE_H264_PPS: p_h264_pps = p; if (p_h264_pps->num_slice_groups_minus1 > 7) return -EINVAL; if (p_h264_pps->num_ref_idx_l0_default_active_minus1 > (V4L2_H264_REF_LIST_LEN - 1)) return -EINVAL; if (p_h264_pps->num_ref_idx_l1_default_active_minus1 > (V4L2_H264_REF_LIST_LEN - 1)) return -EINVAL; if (p_h264_pps->weighted_bipred_idc > 2) return -EINVAL; /* * pic_init_qp_minus26 shall be in the range of * -(26 + QpBdOffset_y) to +25, inclusive, * where QpBdOffset_y is 6 * bit_depth_luma_minus8 */ if (p_h264_pps->pic_init_qp_minus26 < -62 || p_h264_pps->pic_init_qp_minus26 > 25) return -EINVAL; if (p_h264_pps->pic_init_qs_minus26 < -26 || p_h264_pps->pic_init_qs_minus26 > 25) return -EINVAL; if (p_h264_pps->chroma_qp_index_offset < -12 || p_h264_pps->chroma_qp_index_offset > 12) return -EINVAL; if (p_h264_pps->second_chroma_qp_index_offset < -12 || p_h264_pps->second_chroma_qp_index_offset > 12) return -EINVAL; break; case V4L2_CTRL_TYPE_H264_SCALING_MATRIX: break; case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS: p_h264_pred_weights = p; if (p_h264_pred_weights->luma_log2_weight_denom > 7) return -EINVAL; if (p_h264_pred_weights->chroma_log2_weight_denom > 7) return -EINVAL; break; case V4L2_CTRL_TYPE_H264_SLICE_PARAMS: p_h264_slice_params = p; if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B) p_h264_slice_params->flags &= ~V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED; if (p_h264_slice_params->colour_plane_id > 2) return -EINVAL; if (p_h264_slice_params->cabac_init_idc > 2) return -EINVAL; if (p_h264_slice_params->disable_deblocking_filter_idc > 2) return -EINVAL; if (p_h264_slice_params->slice_alpha_c0_offset_div2 < -6 || p_h264_slice_params->slice_alpha_c0_offset_div2 > 6) return -EINVAL; if (p_h264_slice_params->slice_beta_offset_div2 < -6 || p_h264_slice_params->slice_beta_offset_div2 > 6) return -EINVAL; if (p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_I || p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_SI) p_h264_slice_params->num_ref_idx_l0_active_minus1 = 0; if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B) p_h264_slice_params->num_ref_idx_l1_active_minus1 = 0; if (p_h264_slice_params->num_ref_idx_l0_active_minus1 > (V4L2_H264_REF_LIST_LEN - 1)) return -EINVAL; if (p_h264_slice_params->num_ref_idx_l1_active_minus1 > (V4L2_H264_REF_LIST_LEN - 1)) return -EINVAL; zero_reserved(*p_h264_slice_params); break; case V4L2_CTRL_TYPE_H264_DECODE_PARAMS: p_h264_dec_params = p; if (p_h264_dec_params->nal_ref_idc > 3) return -EINVAL; for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) { struct v4l2_h264_dpb_entry *dpb_entry = &p_h264_dec_params->dpb[i]; zero_reserved(*dpb_entry); } zero_reserved(*p_h264_dec_params); break; case V4L2_CTRL_TYPE_VP8_FRAME: p_vp8_frame = p; switch (p_vp8_frame->num_dct_parts) { case 1: case 2: case 4: case 8: break; default: return -EINVAL; } zero_padding(p_vp8_frame->segment); zero_padding(p_vp8_frame->lf); zero_padding(p_vp8_frame->quant); zero_padding(p_vp8_frame->entropy); zero_padding(p_vp8_frame->coder_state); break; case V4L2_CTRL_TYPE_HEVC_SPS: p_hevc_sps = p; if (!(p_hevc_sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED)) { p_hevc_sps->pcm_sample_bit_depth_luma_minus1 = 0; p_hevc_sps->pcm_sample_bit_depth_chroma_minus1 = 0; p_hevc_sps->log2_min_pcm_luma_coding_block_size_minus3 = 0; p_hevc_sps->log2_diff_max_min_pcm_luma_coding_block_size = 0; } if (!(p_hevc_sps->flags & V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT)) p_hevc_sps->num_long_term_ref_pics_sps = 0; break; case V4L2_CTRL_TYPE_HEVC_PPS: p_hevc_pps = p; if (!(p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED)) p_hevc_pps->diff_cu_qp_delta_depth = 0; if (!(p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_TILES_ENABLED)) { p_hevc_pps->num_tile_columns_minus1 = 0; p_hevc_pps->num_tile_rows_minus1 = 0; memset(&p_hevc_pps->column_width_minus1, 0, sizeof(p_hevc_pps->column_width_minus1)); memset(&p_hevc_pps->row_height_minus1, 0, sizeof(p_hevc_pps->row_height_minus1)); p_hevc_pps->flags &= ~V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED; } if (p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER) { p_hevc_pps->pps_beta_offset_div2 = 0; p_hevc_pps->pps_tc_offset_div2 = 0; } break; case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS: p_hevc_decode_params = p; if (p_hevc_decode_params->num_active_dpb_entries > V4L2_HEVC_DPB_ENTRIES_NUM_MAX) return -EINVAL; break; case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS: break; case V4L2_CTRL_TYPE_HDR10_CLL_INFO: break; case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY: p_hdr10_mastering = p; for (i = 0; i < 3; ++i) { if (p_hdr10_mastering->display_primaries_x[i] < V4L2_HDR10_MASTERING_PRIMARIES_X_LOW || p_hdr10_mastering->display_primaries_x[i] > V4L2_HDR10_MASTERING_PRIMARIES_X_HIGH || p_hdr10_mastering->display_primaries_y[i] < V4L2_HDR10_MASTERING_PRIMARIES_Y_LOW || p_hdr10_mastering->display_primaries_y[i] > V4L2_HDR10_MASTERING_PRIMARIES_Y_HIGH) return -EINVAL; } if (p_hdr10_mastering->white_point_x < V4L2_HDR10_MASTERING_WHITE_POINT_X_LOW || p_hdr10_mastering->white_point_x > V4L2_HDR10_MASTERING_WHITE_POINT_X_HIGH || p_hdr10_mastering->white_point_y < V4L2_HDR10_MASTERING_WHITE_POINT_Y_LOW || p_hdr10_mastering->white_point_y > V4L2_HDR10_MASTERING_WHITE_POINT_Y_HIGH) return -EINVAL; if (p_hdr10_mastering->max_display_mastering_luminance < V4L2_HDR10_MASTERING_MAX_LUMA_LOW || p_hdr10_mastering->max_display_mastering_luminance > V4L2_HDR10_MASTERING_MAX_LUMA_HIGH || p_hdr10_mastering->min_display_mastering_luminance < V4L2_HDR10_MASTERING_MIN_LUMA_LOW || p_hdr10_mastering->min_display_mastering_luminance > V4L2_HDR10_MASTERING_MIN_LUMA_HIGH) return -EINVAL; /* The following restriction comes from ITU-T Rec. H.265 spec */ if (p_hdr10_mastering->max_display_mastering_luminance == V4L2_HDR10_MASTERING_MAX_LUMA_LOW && p_hdr10_mastering->min_display_mastering_luminance == V4L2_HDR10_MASTERING_MIN_LUMA_HIGH) return -EINVAL; break; case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX: break; case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR: return validate_vp9_compressed_hdr(p); case V4L2_CTRL_TYPE_VP9_FRAME: return validate_vp9_frame(p); case V4L2_CTRL_TYPE_AV1_FRAME: return validate_av1_frame(p); case V4L2_CTRL_TYPE_AV1_SEQUENCE: return validate_av1_sequence(p); case V4L2_CTRL_TYPE_AV1_TILE_GROUP_ENTRY: break; case V4L2_CTRL_TYPE_AV1_FILM_GRAIN: return validate_av1_film_grain(p); case V4L2_CTRL_TYPE_AREA: area = p; if (!area->width || !area->height) return -EINVAL; break; default: return -EINVAL; } return 0; } static int std_validate_elem(const struct v4l2_ctrl *ctrl, u32 idx, union v4l2_ctrl_ptr ptr) { size_t len; u64 offset; s64 val; switch ((u32)ctrl->type) { case V4L2_CTRL_TYPE_INTEGER: return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl); case V4L2_CTRL_TYPE_INTEGER64: /* * We can't use the ROUND_TO_RANGE define here due to * the u64 divide that needs special care. */ val = ptr.p_s64[idx]; if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2)) val = ctrl->maximum; else val += (s64)(ctrl->step / 2); val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum); offset = val - ctrl->minimum; do_div(offset, ctrl->step); ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step; return 0; case V4L2_CTRL_TYPE_U8: return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl); case V4L2_CTRL_TYPE_U16: return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl); case V4L2_CTRL_TYPE_U32: return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl); case V4L2_CTRL_TYPE_BOOLEAN: ptr.p_s32[idx] = !!ptr.p_s32[idx]; return 0; case V4L2_CTRL_TYPE_MENU: case V4L2_CTRL_TYPE_INTEGER_MENU: if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum) return -ERANGE; if (ptr.p_s32[idx] < BITS_PER_LONG_LONG && (ctrl->menu_skip_mask & BIT_ULL(ptr.p_s32[idx]))) return -EINVAL; if (ctrl->type == V4L2_CTRL_TYPE_MENU && ctrl->qmenu[ptr.p_s32[idx]][0] == '\0') return -EINVAL; return 0; case V4L2_CTRL_TYPE_BITMASK: ptr.p_s32[idx] &= ctrl->maximum; return 0; case V4L2_CTRL_TYPE_BUTTON: case V4L2_CTRL_TYPE_CTRL_CLASS: ptr.p_s32[idx] = 0; return 0; case V4L2_CTRL_TYPE_STRING: idx *= ctrl->elem_size; len = strlen(ptr.p_char + idx); if (len < ctrl->minimum) return -ERANGE; if ((len - (u32)ctrl->minimum) % (u32)ctrl->step) return -ERANGE; return 0; default: return std_validate_compound(ctrl, idx, ptr); } } int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr ptr) { unsigned int i; int ret = 0; switch ((u32)ctrl->type) { case V4L2_CTRL_TYPE_U8: if (ctrl->maximum == 0xff && ctrl->minimum == 0 && ctrl->step == 1) return 0; break; case V4L2_CTRL_TYPE_U16: if (ctrl->maximum == 0xffff && ctrl->minimum == 0 && ctrl->step == 1) return 0; break; case V4L2_CTRL_TYPE_U32: if (ctrl->maximum == 0xffffffff && ctrl->minimum == 0 && ctrl->step == 1) return 0; break; case V4L2_CTRL_TYPE_BUTTON: case V4L2_CTRL_TYPE_CTRL_CLASS: memset(ptr.p_s32, 0, ctrl->new_elems * sizeof(s32)); return 0; } for (i = 0; !ret && i < ctrl->new_elems; i++) ret = std_validate_elem(ctrl, i, ptr); return ret; } EXPORT_SYMBOL(v4l2_ctrl_type_op_validate); static const struct v4l2_ctrl_type_ops std_type_ops = { .equal = v4l2_ctrl_type_op_equal, .init = v4l2_ctrl_type_op_init, .log = v4l2_ctrl_type_op_log, .validate = v4l2_ctrl_type_op_validate, }; void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv) { if (!ctrl) return; if (!notify) { ctrl->call_notify = 0; return; } if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify)) return; ctrl->handler->notify = notify; ctrl->handler->notify_priv = priv; ctrl->call_notify = 1; } EXPORT_SYMBOL(v4l2_ctrl_notify); /* Copy the one value to another. */ static void ptr_to_ptr(struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to, unsigned int elems) { if (ctrl == NULL) return; memcpy(to.p, from.p_const, elems * ctrl->elem_size); } /* Copy the new value to the current value. */ void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags) { bool changed; if (ctrl == NULL) return; /* has_changed is set by cluster_changed */ changed = ctrl->has_changed; if (changed) { if (ctrl->is_dyn_array) ctrl->elems = ctrl->new_elems; ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur, ctrl->elems); } if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) { /* Note: CH_FLAGS is only set for auto clusters. */ ctrl->flags &= ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE); if (!is_cur_manual(ctrl->cluster[0])) { ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; if (ctrl->cluster[0]->has_volatiles) ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; } fh = NULL; } if (changed || ch_flags) { /* If a control was changed that was not one of the controls modified by the application, then send the event to all. */ if (!ctrl->is_new) fh = NULL; send_event(fh, ctrl, (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags); if (ctrl->call_notify && changed && ctrl->handler->notify) ctrl->handler->notify(ctrl, ctrl->handler->notify_priv); } } /* Copy the current value to the new value */ void cur_to_new(struct v4l2_ctrl *ctrl) { if (ctrl == NULL) return; if (ctrl->is_dyn_array) ctrl->new_elems = ctrl->elems; ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new, ctrl->new_elems); } static bool req_alloc_array(struct v4l2_ctrl_ref *ref, u32 elems) { void *tmp; if (elems == ref->p_req_array_alloc_elems) return true; if (ref->ctrl->is_dyn_array && elems < ref->p_req_array_alloc_elems) return true; tmp = kvmalloc(elems * ref->ctrl->elem_size, GFP_KERNEL); if (!tmp) { ref->p_req_array_enomem = true; return false; } ref->p_req_array_enomem = false; kvfree(ref->p_req.p); ref->p_req.p = tmp; ref->p_req_array_alloc_elems = elems; return true; } /* Copy the new value to the request value */ void new_to_req(struct v4l2_ctrl_ref *ref) { struct v4l2_ctrl *ctrl; if (!ref) return; ctrl = ref->ctrl; if (ctrl->is_array && !req_alloc_array(ref, ctrl->new_elems)) return; ref->p_req_elems = ctrl->new_elems; ptr_to_ptr(ctrl, ctrl->p_new, ref->p_req, ref->p_req_elems); ref->p_req_valid = true; } /* Copy the current value to the request value */ void cur_to_req(struct v4l2_ctrl_ref *ref) { struct v4l2_ctrl *ctrl; if (!ref) return; ctrl = ref->ctrl; if (ctrl->is_array && !req_alloc_array(ref, ctrl->elems)) return; ref->p_req_elems = ctrl->elems; ptr_to_ptr(ctrl, ctrl->p_cur, ref->p_req, ctrl->elems); ref->p_req_valid = true; } /* Copy the request value to the new value */ int req_to_new(struct v4l2_ctrl_ref *ref) { struct v4l2_ctrl *ctrl; if (!ref) return 0; ctrl = ref->ctrl; /* * This control was never set in the request, so just use the current * value. */ if (!ref->p_req_valid) { if (ctrl->is_dyn_array) ctrl->new_elems = ctrl->elems; ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new, ctrl->new_elems); return 0; } /* Not an array, so just copy the request value */ if (!ctrl->is_array) { ptr_to_ptr(ctrl, ref->p_req, ctrl->p_new, ctrl->new_elems); return 0; } /* Sanity check, should never happen */ if (WARN_ON(!ref->p_req_array_alloc_elems)) return -ENOMEM; if (!ctrl->is_dyn_array && ref->p_req_elems != ctrl->p_array_alloc_elems) return -ENOMEM; /* * Check if the number of elements in the request is more than the * elements in ctrl->p_array. If so, attempt to realloc ctrl->p_array. * Note that p_array is allocated with twice the number of elements * in the dynamic array since it has to store both the current and * new value of such a control. */ if (ref->p_req_elems > ctrl->p_array_alloc_elems) { unsigned int sz = ref->p_req_elems * ctrl->elem_size; void *old = ctrl->p_array; void *tmp = kvzalloc(2 * sz, GFP_KERNEL); if (!tmp) return -ENOMEM; memcpy(tmp, ctrl->p_new.p, ctrl->elems * ctrl->elem_size); memcpy(tmp + sz, ctrl->p_cur.p, ctrl->elems * ctrl->elem_size); ctrl->p_new.p = tmp; ctrl->p_cur.p = tmp + sz; ctrl->p_array = tmp; ctrl->p_array_alloc_elems = ref->p_req_elems; kvfree(old); } ctrl->new_elems = ref->p_req_elems; ptr_to_ptr(ctrl, ref->p_req, ctrl->p_new, ctrl->new_elems); return 0; } /* Control range checking */ int check_range(enum v4l2_ctrl_type type, s64 min, s64 max, u64 step, s64 def) { switch (type) { case V4L2_CTRL_TYPE_BOOLEAN: if (step != 1 || max > 1 || min < 0) return -ERANGE; fallthrough; case V4L2_CTRL_TYPE_U8: case V4L2_CTRL_TYPE_U16: case V4L2_CTRL_TYPE_U32: case V4L2_CTRL_TYPE_INTEGER: case V4L2_CTRL_TYPE_INTEGER64: if (step == 0 || min > max || def < min || def > max) return -ERANGE; return 0; case V4L2_CTRL_TYPE_BITMASK: if (step || min || !max || (def & ~max)) return -ERANGE; return 0; case V4L2_CTRL_TYPE_MENU: case V4L2_CTRL_TYPE_INTEGER_MENU: if (min > max || def < min || def > max || min < 0 || (step && max >= BITS_PER_LONG_LONG)) return -ERANGE; /* Note: step == menu_skip_mask for menu controls. So here we check if the default value is masked out. */ if (def < BITS_PER_LONG_LONG && (step & BIT_ULL(def))) return -EINVAL; return 0; case V4L2_CTRL_TYPE_STRING: if (min > max || min < 0 || step < 1 || def) return -ERANGE; return 0; default: return 0; } } /* Set the handler's error code if it wasn't set earlier already */ static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err) { if (hdl->error == 0) hdl->error = err; return err; } /* Initialize the handler */ int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl, unsigned nr_of_controls_hint, struct lock_class_key *key, const char *name) { mutex_init(&hdl->_lock); hdl->lock = &hdl->_lock; lockdep_set_class_and_name(hdl->lock, key, name); INIT_LIST_HEAD(&hdl->ctrls); INIT_LIST_HEAD(&hdl->ctrl_refs); hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8; hdl->buckets = kvcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]), GFP_KERNEL); hdl->error = hdl->buckets ? 0 : -ENOMEM; v4l2_ctrl_handler_init_request(hdl); return hdl->error; } EXPORT_SYMBOL(v4l2_ctrl_handler_init_class); /* Free all controls and control refs */ void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl) { struct v4l2_ctrl_ref *ref, *next_ref; struct v4l2_ctrl *ctrl, *next_ctrl; struct v4l2_subscribed_event *sev, *next_sev; if (hdl == NULL || hdl->buckets == NULL) return; v4l2_ctrl_handler_free_request(hdl); mutex_lock(hdl->lock); /* Free all nodes */ list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) { list_del(&ref->node); if (ref->p_req_array_alloc_elems) kvfree(ref->p_req.p); kfree(ref); } /* Free all controls owned by the handler */ list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) { list_del(&ctrl->node); list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node) list_del(&sev->node); kvfree(ctrl->p_array); kvfree(ctrl); } kvfree(hdl->buckets); hdl->buckets = NULL; hdl->cached = NULL; hdl->error = 0; mutex_unlock(hdl->lock); mutex_destroy(&hdl->_lock); } EXPORT_SYMBOL(v4l2_ctrl_handler_free); /* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing with applications that do not use the NEXT_CTRL flag. We just find the n-th private user control. It's O(N), but that should not be an issue in this particular case. */ static struct v4l2_ctrl_ref *find_private_ref( struct v4l2_ctrl_handler *hdl, u32 id) { struct v4l2_ctrl_ref *ref; id -= V4L2_CID_PRIVATE_BASE; list_for_each_entry(ref, &hdl->ctrl_refs, node) { /* Search for private user controls that are compatible with VIDIOC_G/S_CTRL. */ if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER && V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) { if (!ref->ctrl->is_int) continue; if (id == 0) return ref; id--; } } return NULL; } /* Find a control with the given ID. */ struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id) { struct v4l2_ctrl_ref *ref; int bucket; id &= V4L2_CTRL_ID_MASK; /* Old-style private controls need special handling */ if (id >= V4L2_CID_PRIVATE_BASE) return find_private_ref(hdl, id); bucket = id % hdl->nr_of_buckets; /* Simple optimization: cache the last control found */ if (hdl->cached && hdl->cached->ctrl->id == id) return hdl->cached; /* Not in cache, search the hash */ ref = hdl->buckets ? hdl->buckets[bucket] : NULL; while (ref && ref->ctrl->id != id) ref = ref->next; if (ref) hdl->cached = ref; /* cache it! */ return ref; } /* Find a control with the given ID. Take the handler's lock first. */ struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id) { struct v4l2_ctrl_ref *ref = NULL; if (hdl) { mutex_lock(hdl->lock); ref = find_ref(hdl, id); mutex_unlock(hdl->lock); } return ref; } /* Find a control with the given ID. */ struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id) { struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id); return ref ? ref->ctrl : NULL; } EXPORT_SYMBOL(v4l2_ctrl_find); /* Allocate a new v4l2_ctrl_ref and hook it into the handler. */ int handler_new_ref(struct v4l2_ctrl_handler *hdl, struct v4l2_ctrl *ctrl, struct v4l2_ctrl_ref **ctrl_ref, bool from_other_dev, bool allocate_req) { struct v4l2_ctrl_ref *ref; struct v4l2_ctrl_ref *new_ref; u32 id = ctrl->id; u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1; int bucket = id % hdl->nr_of_buckets; /* which bucket to use */ unsigned int size_extra_req = 0; if (ctrl_ref) *ctrl_ref = NULL; /* * Automatically add the control class if it is not yet present and * the new control is not a compound control. */ if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES && id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL) if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0)) return hdl->error; if (hdl->error) return hdl->error; if (allocate_req && !ctrl->is_array) size_extra_req = ctrl->elems * ctrl->elem_size; new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL); if (!new_ref) return handler_set_err(hdl, -ENOMEM); new_ref->ctrl = ctrl; new_ref->from_other_dev = from_other_dev; if (size_extra_req) new_ref->p_req.p = &new_ref[1]; INIT_LIST_HEAD(&new_ref->node); mutex_lock(hdl->lock); /* Add immediately at the end of the list if the list is empty, or if the last element in the list has a lower ID. This ensures that when elements are added in ascending order the insertion is an O(1) operation. */ if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) { list_add_tail(&new_ref->node, &hdl->ctrl_refs); goto insert_in_hash; } /* Find insert position in sorted list */ list_for_each_entry(ref, &hdl->ctrl_refs, node) { if (ref->ctrl->id < id) continue; /* Don't add duplicates */ if (ref->ctrl->id == id) { kfree(new_ref); goto unlock; } list_add(&new_ref->node, ref->node.prev); break; } insert_in_hash: /* Insert the control node in the hash */ new_ref->next = hdl->buckets[bucket]; hdl->buckets[bucket] = new_ref; if (ctrl_ref) *ctrl_ref = new_ref; if (ctrl->handler == hdl) { /* By default each control starts in a cluster of its own. * new_ref->ctrl is basically a cluster array with one * element, so that's perfect to use as the cluster pointer. * But only do this for the handler that owns the control. */ ctrl->cluster = &new_ref->ctrl; ctrl->ncontrols = 1; } unlock: mutex_unlock(hdl->lock); return 0; } /* Add a new control */ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_ops *ops, const struct v4l2_ctrl_type_ops *type_ops, u32 id, const char *name, enum v4l2_ctrl_type type, s64 min, s64 max, u64 step, s64 def, const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size, u32 flags, const char * const *qmenu, const s64 *qmenu_int, const union v4l2_ctrl_ptr p_def, void *priv) { struct v4l2_ctrl *ctrl; unsigned sz_extra; unsigned nr_of_dims = 0; unsigned elems = 1; bool is_array; unsigned tot_ctrl_size; void *data; int err; if (hdl->error) return NULL; while (dims && dims[nr_of_dims]) { elems *= dims[nr_of_dims]; nr_of_dims++; if (nr_of_dims == V4L2_CTRL_MAX_DIMS) break; } is_array = nr_of_dims > 0; /* Prefill elem_size for all types handled by std_type_ops */ switch ((u32)type) { case V4L2_CTRL_TYPE_INTEGER64: elem_size = sizeof(s64); break; case V4L2_CTRL_TYPE_STRING: elem_size = max + 1; break; case V4L2_CTRL_TYPE_U8: elem_size = sizeof(u8); break; case V4L2_CTRL_TYPE_U16: elem_size = sizeof(u16); break; case V4L2_CTRL_TYPE_U32: elem_size = sizeof(u32); break; case V4L2_CTRL_TYPE_MPEG2_SEQUENCE: elem_size = sizeof(struct v4l2_ctrl_mpeg2_sequence); break; case V4L2_CTRL_TYPE_MPEG2_PICTURE: elem_size = sizeof(struct v4l2_ctrl_mpeg2_picture); break; case V4L2_CTRL_TYPE_MPEG2_QUANTISATION: elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantisation); break; case V4L2_CTRL_TYPE_FWHT_PARAMS: elem_size = sizeof(struct v4l2_ctrl_fwht_params); break; case V4L2_CTRL_TYPE_H264_SPS: elem_size = sizeof(struct v4l2_ctrl_h264_sps); break; case V4L2_CTRL_TYPE_H264_PPS: elem_size = sizeof(struct v4l2_ctrl_h264_pps); break; case V4L2_CTRL_TYPE_H264_SCALING_MATRIX: elem_size = sizeof(struct v4l2_ctrl_h264_scaling_matrix); break; case V4L2_CTRL_TYPE_H264_SLICE_PARAMS: elem_size = sizeof(struct v4l2_ctrl_h264_slice_params); break; case V4L2_CTRL_TYPE_H264_DECODE_PARAMS: elem_size = sizeof(struct v4l2_ctrl_h264_decode_params); break; case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS: elem_size = sizeof(struct v4l2_ctrl_h264_pred_weights); break; case V4L2_CTRL_TYPE_VP8_FRAME: elem_size = sizeof(struct v4l2_ctrl_vp8_frame); break; case V4L2_CTRL_TYPE_HEVC_SPS: elem_size = sizeof(struct v4l2_ctrl_hevc_sps); break; case V4L2_CTRL_TYPE_HEVC_PPS: elem_size = sizeof(struct v4l2_ctrl_hevc_pps); break; case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS: elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params); break; case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX: elem_size = sizeof(struct v4l2_ctrl_hevc_scaling_matrix); break; case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS: elem_size = sizeof(struct v4l2_ctrl_hevc_decode_params); break; case V4L2_CTRL_TYPE_HDR10_CLL_INFO: elem_size = sizeof(struct v4l2_ctrl_hdr10_cll_info); break; case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY: elem_size = sizeof(struct v4l2_ctrl_hdr10_mastering_display); break; case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR: elem_size = sizeof(struct v4l2_ctrl_vp9_compressed_hdr); break; case V4L2_CTRL_TYPE_VP9_FRAME: elem_size = sizeof(struct v4l2_ctrl_vp9_frame); break; case V4L2_CTRL_TYPE_AV1_SEQUENCE: elem_size = sizeof(struct v4l2_ctrl_av1_sequence); break; case V4L2_CTRL_TYPE_AV1_TILE_GROUP_ENTRY: elem_size = sizeof(struct v4l2_ctrl_av1_tile_group_entry); break; case V4L2_CTRL_TYPE_AV1_FRAME: elem_size = sizeof(struct v4l2_ctrl_av1_frame); break; case V4L2_CTRL_TYPE_AV1_FILM_GRAIN: elem_size = sizeof(struct v4l2_ctrl_av1_film_grain); break; case V4L2_CTRL_TYPE_AREA: elem_size = sizeof(struct v4l2_area); break; default: if (type < V4L2_CTRL_COMPOUND_TYPES) elem_size = sizeof(s32); break; } /* Sanity checks */ if (id == 0 || name == NULL || !elem_size || id >= V4L2_CID_PRIVATE_BASE || (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) || (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) { handler_set_err(hdl, -ERANGE); return NULL; } err = check_range(type, min, max, step, def); if (err) { handler_set_err(hdl, err); return NULL; } if (is_array && (type == V4L2_CTRL_TYPE_BUTTON || type == V4L2_CTRL_TYPE_CTRL_CLASS)) { handler_set_err(hdl, -EINVAL); return NULL; } if (flags & V4L2_CTRL_FLAG_DYNAMIC_ARRAY) { /* * For now only support this for one-dimensional arrays only. * * This can be relaxed in the future, but this will * require more effort. */ if (nr_of_dims != 1) { handler_set_err(hdl, -EINVAL); return NULL; } /* Start with just 1 element */ elems = 1; } tot_ctrl_size = elem_size * elems; sz_extra = 0; if (type == V4L2_CTRL_TYPE_BUTTON) flags |= V4L2_CTRL_FLAG_WRITE_ONLY | V4L2_CTRL_FLAG_EXECUTE_ON_WRITE; else if (type == V4L2_CTRL_TYPE_CTRL_CLASS) flags |= V4L2_CTRL_FLAG_READ_ONLY; else if (!is_array && (type == V4L2_CTRL_TYPE_INTEGER64 || type == V4L2_CTRL_TYPE_STRING || type >= V4L2_CTRL_COMPOUND_TYPES)) sz_extra += 2 * tot_ctrl_size; if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) sz_extra += elem_size; ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL); if (ctrl == NULL) { handler_set_err(hdl, -ENOMEM); return NULL; } INIT_LIST_HEAD(&ctrl->node); INIT_LIST_HEAD(&ctrl->ev_subs); ctrl->handler = hdl; ctrl->ops = ops; ctrl->type_ops = type_ops ? type_ops : &std_type_ops; ctrl->id = id; ctrl->name = name; ctrl->type = type; ctrl->flags = flags; ctrl->minimum = min; ctrl->maximum = max; ctrl->step = step; ctrl->default_value = def; ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING; ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string; ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64; ctrl->is_array = is_array; ctrl->is_dyn_array = !!(flags & V4L2_CTRL_FLAG_DYNAMIC_ARRAY); ctrl->elems = elems; ctrl->new_elems = elems; ctrl->nr_of_dims = nr_of_dims; if (nr_of_dims) memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0])); ctrl->elem_size = elem_size; if (type == V4L2_CTRL_TYPE_MENU) ctrl->qmenu = qmenu; else if (type == V4L2_CTRL_TYPE_INTEGER_MENU) ctrl->qmenu_int = qmenu_int; ctrl->priv = priv; ctrl->cur.val = ctrl->val = def; data = &ctrl[1]; if (ctrl->is_array) { ctrl->p_array_alloc_elems = elems; ctrl->p_array = kvzalloc(2 * elems * elem_size, GFP_KERNEL); if (!ctrl->p_array) { kvfree(ctrl); return NULL; } data = ctrl->p_array; } if (!ctrl->is_int) { ctrl->p_new.p = data; ctrl->p_cur.p = data + tot_ctrl_size; } else { ctrl->p_new.p = &ctrl->val; ctrl->p_cur.p = &ctrl->cur.val; } if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) { if (ctrl->is_array) ctrl->p_def.p = &ctrl[1]; else ctrl->p_def.p = ctrl->p_cur.p + tot_ctrl_size; memcpy(ctrl->p_def.p, p_def.p_const, elem_size); } ctrl->type_ops->init(ctrl, 0, ctrl->p_cur); cur_to_new(ctrl); if (handler_new_ref(hdl, ctrl, NULL, false, false)) { kvfree(ctrl->p_array); kvfree(ctrl); return NULL; } mutex_lock(hdl->lock); list_add_tail(&ctrl->node, &hdl->ctrls); mutex_unlock(hdl->lock); return ctrl; } struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_config *cfg, void *priv) { bool is_menu; struct v4l2_ctrl *ctrl; const char *name = cfg->name; const char * const *qmenu = cfg->qmenu; const s64 *qmenu_int = cfg->qmenu_int; enum v4l2_ctrl_type type = cfg->type; u32 flags = cfg->flags; s64 min = cfg->min; s64 max = cfg->max; u64 step = cfg->step; s64 def = cfg->def; if (name == NULL) v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step, &def, &flags); is_menu = (type == V4L2_CTRL_TYPE_MENU || type == V4L2_CTRL_TYPE_INTEGER_MENU); if (is_menu) WARN_ON(step); else WARN_ON(cfg->menu_skip_mask); if (type == V4L2_CTRL_TYPE_MENU && !qmenu) { qmenu = v4l2_ctrl_get_menu(cfg->id); } else if (type == V4L2_CTRL_TYPE_INTEGER_MENU && !qmenu_int) { handler_set_err(hdl, -EINVAL); return NULL; } ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name, type, min, max, is_menu ? cfg->menu_skip_mask : step, def, cfg->dims, cfg->elem_size, flags, qmenu, qmenu_int, cfg->p_def, priv); if (ctrl) ctrl->is_private = cfg->is_private; return ctrl; } EXPORT_SYMBOL(v4l2_ctrl_new_custom); /* Helper function for standard non-menu controls */ struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_ops *ops, u32 id, s64 min, s64 max, u64 step, s64 def) { const char *name; enum v4l2_ctrl_type type; u32 flags; v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); if (type == V4L2_CTRL_TYPE_MENU || type == V4L2_CTRL_TYPE_INTEGER_MENU || type >= V4L2_CTRL_COMPOUND_TYPES) { handler_set_err(hdl, -EINVAL); return NULL; } return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, min, max, step, def, NULL, 0, flags, NULL, NULL, ptr_null, NULL); } EXPORT_SYMBOL(v4l2_ctrl_new_std); /* Helper function for standard menu controls */ struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_ops *ops, u32 id, u8 _max, u64 mask, u8 _def) { const char * const *qmenu = NULL; const s64 *qmenu_int = NULL; unsigned int qmenu_int_len = 0; const char *name; enum v4l2_ctrl_type type; s64 min; s64 max = _max; s64 def = _def; u64 step; u32 flags; v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); if (type == V4L2_CTRL_TYPE_MENU) qmenu = v4l2_ctrl_get_menu(id); else if (type == V4L2_CTRL_TYPE_INTEGER_MENU) qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len); if ((!qmenu && !qmenu_int) || (qmenu_int && max >= qmenu_int_len)) { handler_set_err(hdl, -EINVAL); return NULL; } return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 0, max, mask, def, NULL, 0, flags, qmenu, qmenu_int, ptr_null, NULL); } EXPORT_SYMBOL(v4l2_ctrl_new_std_menu); /* Helper function for standard menu controls with driver defined menu */ struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_ops *ops, u32 id, u8 _max, u64 mask, u8 _def, const char * const *qmenu) { enum v4l2_ctrl_type type; const char *name; u32 flags; u64 step; s64 min; s64 max = _max; s64 def = _def; /* v4l2_ctrl_new_std_menu_items() should only be called for * standard controls without a standard menu. */ if (v4l2_ctrl_get_menu(id)) { handler_set_err(hdl, -EINVAL); return NULL; } v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) { handler_set_err(hdl, -EINVAL); return NULL; } return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 0, max, mask, def, NULL, 0, flags, qmenu, NULL, ptr_null, NULL); } EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items); /* Helper function for standard compound controls */ struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_ops *ops, u32 id, const union v4l2_ctrl_ptr p_def) { const char *name; enum v4l2_ctrl_type type; u32 flags; s64 min, max, step, def; v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); if (type < V4L2_CTRL_COMPOUND_TYPES) { handler_set_err(hdl, -EINVAL); return NULL; } return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, min, max, step, def, NULL, 0, flags, NULL, NULL, p_def, NULL); } EXPORT_SYMBOL(v4l2_ctrl_new_std_compound); /* Helper function for standard integer menu controls */ struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_ops *ops, u32 id, u8 _max, u8 _def, const s64 *qmenu_int) { const char *name; enum v4l2_ctrl_type type; s64 min; u64 step; s64 max = _max; s64 def = _def; u32 flags; v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); if (type != V4L2_CTRL_TYPE_INTEGER_MENU) { handler_set_err(hdl, -EINVAL); return NULL; } return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 0, max, 0, def, NULL, 0, flags, NULL, qmenu_int, ptr_null, NULL); } EXPORT_SYMBOL(v4l2_ctrl_new_int_menu); /* Add the controls from another handler to our own. */ int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, struct v4l2_ctrl_handler *add, bool (*filter)(const struct v4l2_ctrl *ctrl), bool from_other_dev) { struct v4l2_ctrl_ref *ref; int ret = 0; /* Do nothing if either handler is NULL or if they are the same */ if (!hdl || !add || hdl == add) return 0; if (hdl->error) return hdl->error; mutex_lock(add->lock); list_for_each_entry(ref, &add->ctrl_refs, node) { struct v4l2_ctrl *ctrl = ref->ctrl; /* Skip handler-private controls. */ if (ctrl->is_private) continue; /* And control classes */ if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) continue; /* Filter any unwanted controls */ if (filter && !filter(ctrl)) continue; ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false); if (ret) break; } mutex_unlock(add->lock); return ret; } EXPORT_SYMBOL(v4l2_ctrl_add_handler); bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl) { if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX) return true; if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX) return true; switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: case V4L2_CID_AUDIO_VOLUME: case V4L2_CID_AUDIO_BALANCE: case V4L2_CID_AUDIO_BASS: case V4L2_CID_AUDIO_TREBLE: case V4L2_CID_AUDIO_LOUDNESS: return true; default: break; } return false; } EXPORT_SYMBOL(v4l2_ctrl_radio_filter); /* Cluster controls */ void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls) { bool has_volatiles = false; int i; /* The first control is the master control and it must not be NULL */ if (WARN_ON(ncontrols == 0 || controls[0] == NULL)) return; for (i = 0; i < ncontrols; i++) { if (controls[i]) { controls[i]->cluster = controls; controls[i]->ncontrols = ncontrols; if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE) has_volatiles = true; } } controls[0]->has_volatiles = has_volatiles; } EXPORT_SYMBOL(v4l2_ctrl_cluster); void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls, u8 manual_val, bool set_volatile) { struct v4l2_ctrl *master = controls[0]; u32 flag = 0; int i; v4l2_ctrl_cluster(ncontrols, controls); WARN_ON(ncontrols <= 1); WARN_ON(manual_val < master->minimum || manual_val > master->maximum); WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl)); master->is_auto = true; master->has_volatiles = set_volatile; master->manual_mode_value = manual_val; master->flags |= V4L2_CTRL_FLAG_UPDATE; if (!is_cur_manual(master)) flag = V4L2_CTRL_FLAG_INACTIVE | (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0); for (i = 1; i < ncontrols; i++) if (controls[i]) controls[i]->flags |= flag; } EXPORT_SYMBOL(v4l2_ctrl_auto_cluster); /* * Obtain the current volatile values of an autocluster and mark them * as new. */ void update_from_auto_cluster(struct v4l2_ctrl *master) { int i; for (i = 1; i < master->ncontrols; i++) cur_to_new(master->cluster[i]); if (!call_op(master, g_volatile_ctrl)) for (i = 1; i < master->ncontrols; i++) if (master->cluster[i]) master->cluster[i]->is_new = 1; } /* * Return non-zero if one or more of the controls in the cluster has a new * value that differs from the current value. */ static int cluster_changed(struct v4l2_ctrl *master) { bool changed = false; int i; for (i = 0; i < master->ncontrols; i++) { struct v4l2_ctrl *ctrl = master->cluster[i]; bool ctrl_changed = false; if (!ctrl) continue; if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE) { changed = true; ctrl_changed = true; } /* * Set has_changed to false to avoid generating * the event V4L2_EVENT_CTRL_CH_VALUE */ if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) { ctrl->has_changed = false; continue; } if (ctrl->elems != ctrl->new_elems) ctrl_changed = true; if (!ctrl_changed) ctrl_changed = !ctrl->type_ops->equal(ctrl, ctrl->p_cur, ctrl->p_new); ctrl->has_changed = ctrl_changed; changed |= ctrl->has_changed; } return changed; } /* * Core function that calls try/s_ctrl and ensures that the new value is * copied to the current value on a set. * Must be called with ctrl->handler->lock held. */ int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master, bool set, u32 ch_flags) { bool update_flag; int ret; int i; /* * Go through the cluster and either validate the new value or * (if no new value was set), copy the current value to the new * value, ensuring a consistent view for the control ops when * called. */ for (i = 0; i < master->ncontrols; i++) { struct v4l2_ctrl *ctrl = master->cluster[i]; if (!ctrl) continue; if (!ctrl->is_new) { cur_to_new(ctrl); continue; } /* * Check again: it may have changed since the * previous check in try_or_set_ext_ctrls(). */ if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) return -EBUSY; } ret = call_op(master, try_ctrl); /* Don't set if there is no change */ if (ret || !set || !cluster_changed(master)) return ret; ret = call_op(master, s_ctrl); if (ret) return ret; /* If OK, then make the new values permanent. */ update_flag = is_cur_manual(master) != is_new_manual(master); for (i = 0; i < master->ncontrols; i++) { /* * If we switch from auto to manual mode, and this cluster * contains volatile controls, then all non-master controls * have to be marked as changed. The 'new' value contains * the volatile value (obtained by update_from_auto_cluster), * which now has to become the current value. */ if (i && update_flag && is_new_manual(master) && master->has_volatiles && master->cluster[i]) master->cluster[i]->has_changed = true; new_to_cur(fh, master->cluster[i], ch_flags | ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0)); } return 0; } /* Activate/deactivate a control. */ void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active) { /* invert since the actual flag is called 'inactive' */ bool inactive = !active; bool old; if (ctrl == NULL) return; if (inactive) /* set V4L2_CTRL_FLAG_INACTIVE */ old = test_and_set_bit(4, &ctrl->flags); else /* clear V4L2_CTRL_FLAG_INACTIVE */ old = test_and_clear_bit(4, &ctrl->flags); if (old != inactive) send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); } EXPORT_SYMBOL(v4l2_ctrl_activate); void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed) { bool old; if (ctrl == NULL) return; lockdep_assert_held(ctrl->handler->lock); if (grabbed) /* set V4L2_CTRL_FLAG_GRABBED */ old = test_and_set_bit(1, &ctrl->flags); else /* clear V4L2_CTRL_FLAG_GRABBED */ old = test_and_clear_bit(1, &ctrl->flags); if (old != grabbed) send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); } EXPORT_SYMBOL(__v4l2_ctrl_grab); /* Call s_ctrl for all controls owned by the handler */ int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl) { struct v4l2_ctrl *ctrl; int ret = 0; if (hdl == NULL) return 0; lockdep_assert_held(hdl->lock); list_for_each_entry(ctrl, &hdl->ctrls, node) ctrl->done = false; list_for_each_entry(ctrl, &hdl->ctrls, node) { struct v4l2_ctrl *master = ctrl->cluster[0]; int i; /* Skip if this control was already handled by a cluster. */ /* Skip button controls and read-only controls. */ if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON || (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)) continue; for (i = 0; i < master->ncontrols; i++) { if (master->cluster[i]) { cur_to_new(master->cluster[i]); master->cluster[i]->is_new = 1; master->cluster[i]->done = true; } } ret = call_op(master, s_ctrl); if (ret) break; } return ret; } EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup); int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl) { int ret; if (hdl == NULL) return 0; mutex_lock(hdl->lock); ret = __v4l2_ctrl_handler_setup(hdl); mutex_unlock(hdl->lock); return ret; } EXPORT_SYMBOL(v4l2_ctrl_handler_setup); /* Log the control name and value */ static void log_ctrl(const struct v4l2_ctrl *ctrl, const char *prefix, const char *colon) { if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY)) return; if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) return; pr_info("%s%s%s: ", prefix, colon, ctrl->name); ctrl->type_ops->log(ctrl); if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_GRABBED | V4L2_CTRL_FLAG_VOLATILE)) { if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) pr_cont(" inactive"); if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED) pr_cont(" grabbed"); if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) pr_cont(" volatile"); } pr_cont("\n"); } /* Log all controls owned by the handler */ void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl, const char *prefix) { struct v4l2_ctrl *ctrl; const char *colon = ""; int len; if (!hdl) return; if (!prefix) prefix = ""; len = strlen(prefix); if (len && prefix[len - 1] != ' ') colon = ": "; mutex_lock(hdl->lock); list_for_each_entry(ctrl, &hdl->ctrls, node) if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED)) log_ctrl(ctrl, prefix, colon); mutex_unlock(hdl->lock); } EXPORT_SYMBOL(v4l2_ctrl_handler_log_status); int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl, const struct v4l2_ctrl_ops *ctrl_ops, const struct v4l2_fwnode_device_properties *p) { if (hdl->error) return hdl->error; if (p->orientation != V4L2_FWNODE_PROPERTY_UNSET) { u32 orientation_ctrl; switch (p->orientation) { case V4L2_FWNODE_ORIENTATION_FRONT: orientation_ctrl = V4L2_CAMERA_ORIENTATION_FRONT; break; case V4L2_FWNODE_ORIENTATION_BACK: orientation_ctrl = V4L2_CAMERA_ORIENTATION_BACK; break; case V4L2_FWNODE_ORIENTATION_EXTERNAL: orientation_ctrl = V4L2_CAMERA_ORIENTATION_EXTERNAL; break; default: return -EINVAL; } if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops, V4L2_CID_CAMERA_ORIENTATION, V4L2_CAMERA_ORIENTATION_EXTERNAL, 0, orientation_ctrl)) return hdl->error; } if (p->rotation != V4L2_FWNODE_PROPERTY_UNSET) { if (!v4l2_ctrl_new_std(hdl, ctrl_ops, V4L2_CID_CAMERA_SENSOR_ROTATION, p->rotation, p->rotation, 1, p->rotation)) return hdl->error; } return hdl->error; } EXPORT_SYMBOL(v4l2_ctrl_new_fwnode_properties);
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