drmAvailable(libdrm 2.4.40) drmAvailable(libdrm 2.4.40)
NAME
drmAvailable - determine whether a DRM kernel driver has been loaded
SYNOPSIS
#include <xf86drm.h>
int drmAvailable(void);
DESCRIPTION
This function allows the caller to determine whether a kernel DRM driver is loaded.
RETURN VALUE
If a DRM driver is currently loaded, this function returns 1. Otherwise 0 is returned.
REPORTING BUGS
Bugs in this function should be reported to http://bugs.freedesktop.org under the "Mesa" product, with "Other" or "libdrm" as the compo-
nent.
SEE ALSO drmOpen(3)
drmAvailable(libdrm 2.4.40)
Check Out this Related Man Page
DRMHANDLEEVENT(3) Direct Rendering Manager DRMHANDLEEVENT(3)NAME
drmHandleEvent - read and process pending DRM events
SYNOPSIS
#include <xf86drm.h>
int drmHandleEvent(int fd, drmEventContextPtr evctx);
DESCRIPTION
drmHandleEvent processes outstanding DRM events on the DRM file-descriptor passed as fd. This function should be called after the DRM
file-descriptor has polled readable; it will read the events and use the passed-in evctx structure to call function pointers with the
parameters noted below:
typedef struct _drmEventContext {
int version;
void (*vblank_handler) (int fd,
unsigned int sequence,
unsigned int tv_sec,
unsigned int tv_usec,
void *user_data)
void (*page_flip_handler) (int fd,
unsigned int sequence,
unsigned int tv_sec,
unsigned int tv_usec,
void *user_data)
} drmEventContext, *drmEventContextPtr;
RETURN VALUE
drmHandleEvent returns 0 on success, or if there is no data to read from the file-descriptor. Returns -1 if the read on the file-descriptor
fails or returns less than a full event record.
REPORTING BUGS
Bugs in this function should be reported to http://bugs.freedesktop.org under the "Mesa" product, with "Other" or "libdrm" as the
component.
SEE ALSO drm(7), drm-kms(7), drmModePageFlip(3), drmWaitVBlank(3)libdrm September 2012 DRMHANDLEEVENT(3)
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