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backend/drm: add support for the subconnector property

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The subconnector property indicates the connector sub-type. This is
useful because that usually indicates what kind of connector the user
has plugged in to their monitor, e.g. a DisplayPort-to-DVI cable will
indicate a DVI subconnector. Also some laptops have non-DP connectors
that are internally linked to a DP port on the GPU.

Set the output description accordingly.

See https://drmdb.emersion.fr/properties/3233857728/subconnector
This commit is contained in:
Simon Ser 2021-01-13 00:33:19 +01:00
parent 6af748171a
commit cb6f584496
3 changed files with 43 additions and 2 deletions
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2
include/backend/drm/properties.h
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@ -17,6 +17,7 @@ union wlr_drm_connector_props {
uint32_t link_status; // not guaranteed to exist
uint32_t path;
uint32_t vrr_capable; // not guaranteed to exist
uint32_t subconnector; // not guaranteed to exist
// atomic-modesetting only
@ -69,5 +70,6 @@ bool get_drm_plane_props(int fd, uint32_t id, union wlr_drm_plane_props *out);
bool get_drm_prop(int fd, uint32_t obj, uint32_t prop, uint64_t *ret);
void *get_drm_prop_blob(int fd, uint32_t obj, uint32_t prop, size_t *ret_len);
char *get_drm_prop_enum(int fd, uint32_t obj, uint32_t prop);
#endif