diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-03-04 10:07:19 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2015-04-14 15:58:26 +0100 |
| commit | 5ed5fa10600f0140b317ec07be6f24739c11bd18 (patch) | |
| tree | d535444f960512bf8eb809f0359b8abcaa7a4080 /xf86drmMode.h | |
| parent | 6f90b77ea903756c87ae614c093e3d816ebb26fc (diff) | |
mode: Retrieve only the current information for a Connector
Add a new API that allows the caller to skip any forced probing, which
may require slow i2c to a remote display, and only report the currently
active mode and encoder for a Connector. This is often the information
of interest and is much, much faster than re-retrieving the link status
and EDIDs, e.g. if the caller only wishes to count the number of active
outputs.
v2: Fix error path to avoid double free after a failed GETCONNECTOR
ioctl.
v3: Daniel strongly disapproved of my disjoint in behaviour between
GetConnector and GetConnectorCurrent, and considering how best to make a
drop in replacement for drmmode_output_init() convinced me keeping the
API as consistent as possible was the right approach.
v4: Avoid probing on the second calls to GETCONNECTOR for unconnected
outputs.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.com>
Cc: Damien Lespiau <damien.lespiau@intel.com>
Cc: David Herrmann <dh.herrmann@googlemail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'xf86drmMode.h')
| -rw-r--r-- | xf86drmMode.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/xf86drmMode.h b/xf86drmMode.h index 2d30184e..20c3f153 100644 --- a/xf86drmMode.h +++ b/xf86drmMode.h @@ -422,10 +422,23 @@ drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id); */ /** - * Retrive information about the connector connectorId. + * Retrieve all information about the connector connectorId. This will do a + * forced probe on the connector to retrieve remote information such as EDIDs + * from the display device. */ extern drmModeConnectorPtr drmModeGetConnector(int fd, - uint32_t connectorId); + uint32_t connectorId); + +/** + * Retrieve current information, i.e the currently active mode and encoder, + * about the connector connectorId. This will not do any probing on the + * connector or remote device, and only reports what is currently known. + * For the complete set of modes and encoders associated with the connector + * use drmModeGetConnector() which will do a probe to determine any display + * link changes first. + */ +extern drmModeConnectorPtr drmModeGetConnectorCurrent(int fd, + uint32_t connector_id); /** * Attaches the given mode to an connector. |