Manual browser: drm(4)
|DRM(4)||Kernel Interfaces Manual||DRM(4)|
NAMEdrm — Direct Rendering Manager (DRI kernel support)
SYNOPSISi915drm* at drm?
mach64drm* at drm?
mgadrm* at drm?
r128drm* at drm?
radeondrm* at drm?
savagedrm* at drm?
sisdrm* at drm?
tdfxdrm* at drm?
viadrm* at drm?
DESCRIPTIONThe Direct Rendering Manager is part of the Direct Rendering Infrastructure for supporting video acceleration (3d acceleration, mostly).
The drm drivers provide support for the following chipsets:
- Intel i915, i945
- Mach64 (3D Rage Pro, Rage)
- Matrox G00, G50
- ATI Rage 128
- ATI Radeon
- S3 Savage
- 3dfx (Voodoo)
To make use of the driver, the kernel must include agp(4) (for some drivers, using options DRM_NO_AGP instead may be sufficient), X(7) must be compiled with DRI support, Mesa DRI drivers must be installed, the appropriate /dev/dri/card* device must exist, and DRI must be enabled in the X configuration file. X(7) provided with NetBSD and compiled from pkgsrc(7) do so automatically where supported.
X(7) will attempt to create the device node automatically. To create the device node manually:
mkdir -p /dev/dri mknod /dev/dri/card0 c 180 0 chgrp wheel /dev/dri/card0 chmod 0660 /dev/dri/card0
To enable DRI in the X configuration add the following to either xorg.conf for Xorg(1) or XF86Config for XFree86(1) :
Section "Module" ... Load "dri" Load "dri2" Load "glx" EndSection ... Section "DRI" Group "wheel" Mode 0660 EndSection
Debugging output can be enabled and disabled by setting the sysctl(8) node hw.dri.debug. Additional information can be obtained from the sysctl(8) nodes hw.dri, hw.dri.card0, hw.dri.card1, etc.
SEE ALSOXFree86(1), Xorg(1), agp(4), XF86Config(5), xorg.conf(5), X(7), /usr/X11R/lib/X11/doc/README.DRI
HISTORYDRM was first available for Linux. Subsequently Eric Anholt ported the DRM kernel modules to FreeBSD. Erik Reid adapted the FreeBSD DRM kernel modules to NetBSD. As DRM continued to develop the NetBSD support was neglected. Tonnerre Lombard got the DRM modules working again, but DRM development once again left the NetBSD support behind. Finally Yorick Hardy took the FreeBSD DRM source and managed to get it compiling and working again on NetBSD, thanks largely to the efforts of all those mentioned above. Subsequently Matthias Drochner improved the DRM file hierarchy for NetBSD and committed the DRM kernel drivers. Matthew Green cleaned up this port and merged a set of newer drivers, with Arto Huusko and FUKAUMI Naoki helping to get the latest Mesa port up to date.
The drm drivers appeared in NetBSD 5.0.
AUTHORS, , , , , , , , , , , , , , , ,
CAVEATSIn case of errors, /dev/dri/card0 may be changed, make sure to recreate it in that case.
options DRM_DEBUG can slow DRI down a lot; disable it once drm works.
|June 4, 2013||NetBSD 7.0|