1 // SPDX-License-Identifier: MIT
17 	if (sizeof(*base) > length - index)  in displayid_get_header()
18 		return ERR_PTR(-EINVAL);  in displayid_get_header()
37 	dispid_length = sizeof(*base) + base->bytes + 1;  in validate_displayid()
38 	if (dispid_length > length - idx)  in validate_displayid()
39 		return ERR_PTR(-EINVAL);  in validate_displayid()
45 		return ERR_PTR(-EINVAL);  in validate_displayid()
63 	*length = EDID_LENGTH - 1;  in drm_find_displayid_extension()
70 	*length = *idx + sizeof(*base) + base->bytes;  in drm_find_displayid_extension()
80 	iter->drm_edid = drm_edid;  in displayid_iter_edid_begin()
88 	if (!iter->section)  in displayid_iter_block()
91 	block = (const struct displayid_block *)&iter->section[iter->idx];  in displayid_iter_block()
93 	if (iter->idx + sizeof(*block) <= iter->length &&  in displayid_iter_block()
94 	    iter->idx + sizeof(*block) + block->num_bytes <= iter->length)  in displayid_iter_block()
105 	if (!iter->drm_edid)  in __displayid_iter_next()
108 	if (iter->section) {  in __displayid_iter_next()
112 			iter->section = NULL;  in __displayid_iter_next()
113 			iter->drm_edid = NULL;  in __displayid_iter_next()
117 		/* next block in section */  in __displayid_iter_next()
118 		iter->idx += sizeof(*block) + block->num_bytes;  in __displayid_iter_next()
126 		/* The first section we encounter is the base section */  in __displayid_iter_next()
127 		bool base_section = !iter->section;  in __displayid_iter_next()
129 		iter->section = drm_find_displayid_extension(iter->drm_edid,  in __displayid_iter_next()
130 							     &iter->length,  in __displayid_iter_next()
131 							     &iter->idx,  in __displayid_iter_next()
132 							     &iter->ext_index);  in __displayid_iter_next()
133 		if (!iter->section) {  in __displayid_iter_next()
134 			iter->drm_edid = NULL;  in __displayid_iter_next()
142 			base = displayid_get_header(iter->section, iter->length,  in __displayid_iter_next()
143 						    iter->idx);  in __displayid_iter_next()
145 				iter->version = base->rev;  in __displayid_iter_next()
146 				iter->primary_use = base->prod_id;  in __displayid_iter_next()
150 		iter->idx += sizeof(struct displayid_header);  in __displayid_iter_next()
163 /* DisplayID Structure Version/Revision from the Base Section. */
166 	return iter->version;  in displayid_version()
170  * DisplayID Primary Use Case (2.0+) or Product Type Identifier (1.0-1.3) from
171  * the Base Section.
175 	return iter->primary_use;  in displayid_primary_use()