diff options
Diffstat (limited to 'drivers/gpu/drm/drm_displayid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_displayid.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c index 0de9b5530393..9edc111be7ee 100644 --- a/drivers/gpu/drm/drm_displayid.c +++ b/drivers/gpu/drm/drm_displayid.c @@ -123,6 +123,9 @@ __displayid_iter_next(struct displayid_iter *iter) } for (;;) { + /* The first section we encounter is the base section */ + bool base_section = !iter->section; + iter->section = drm_find_displayid_extension(iter->drm_edid, &iter->length, &iter->idx, @@ -132,6 +135,18 @@ __displayid_iter_next(struct displayid_iter *iter) return NULL; } + /* Save the structure version and primary use case. */ + if (base_section) { + const struct displayid_header *base; + + base = displayid_get_header(iter->section, iter->length, + iter->idx); + if (!IS_ERR(base)) { + iter->version = base->rev; + iter->primary_use = base->prod_id; + } + } + iter->idx += sizeof(struct displayid_header); block = displayid_iter_block(iter); @@ -144,3 +159,18 @@ void displayid_iter_end(struct displayid_iter *iter) { memset(iter, 0, sizeof(*iter)); } + +/* DisplayID Structure Version/Revision from the Base Section. */ +u8 displayid_version(const struct displayid_iter *iter) +{ + return iter->version; +} + +/* + * DisplayID Primary Use Case (2.0+) or Product Type Identifier (1.0-1.3) from + * the Base Section. + */ +u8 displayid_primary_use(const struct displayid_iter *iter) +{ + return iter->primary_use; +} |