AMDGPU(4) (xf86-video-amdgpu 19.1.0) AMDGPU(4)
NAME
amdgpu - AMD RADEON GPU video driver
SYNOPSIS
Section 34Device34
Identifier 34devname34
Driver 34amdgpu34
...
EndSection
DESCRIPTION
amdgpu is an Xorg driver for AMD RADEON-based video cards
with the following features:
+o Support for 8-, 15-, 16-, 24- and 30-bit pixel depths;
+o RandR support up to version 1.4;
+o 3D acceleration;
SUPPORTED HARDWARE
The amdgpu driver supports SI and newer families' video
cards.
CONFIGURATION DETAILS
Please refer to xorg.conf(5) for general configuration
details. This section only covers configuration details
specific to this driver.
The following driver Options are supported:
Option 34SWcursor34 34boolean34
Selects software cursor. The default is off.
Option 34Accel34 34boolean34
Enables or disables all hardware acceleration.
The default is on.
Option 34ZaphodHeads34 34string34
Specify the RandR output(s) to use with zaphod mode for
a particular driver instance. If you use this option
you must use this option for all instances of the
driver.
For example: Option 34ZaphodHeads34 34LVDS,VGA-034 will
assign xrandr outputs LVDS and VGA-0 to this instance
of the driver.
Option 34DRI34 34integer34
Define the maximum level of DRI to enable. Valid values
are 2 for DRI2 or 3 for DRI3. The default is 3 for
DRI3 if the Xorg version is >= 1.18.3, otherwise 2 for
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DRI2.
Option 34EnablePageFlip34 34boolean34
Enable DRI2 page flipping. The default is on.
Option 34TearFree34 34boolean34
Set the default value of the per-output 'TearFree'
property, which controls tearing prevention using the
hardware page flipping mechanism. TearFree is on for
any CRTC associated with one or more outputs with Tear-
Free on. Two separate scanout buffers need to be allo-
cated for each CRTC with TearFree on. If this option is
set, the default value of the property is 'on' or 'off'
accordingly. If this option isn't set, the default
value of the property is auto, which means that Tear-
Free is on for rotated outputs, outputs with RandR
transforms applied and for RandR 1.4 slave outputs,
otherwise off.
Option 34VariableRefresh34 34boolean34
Enables support for enabling variable refresh on the
Screen's CRTCs when an suitable application is flipping
via the Present extension.
The default is off.
Option 34AccelMethod34 34string34
Setting this option to none disables use of the glamor
acceleration architecture. In that case, all 2D render-
ing is done by the CPU, but 3D and video hardware
acceleration can still work. This is mainly useful for
OpenGL driver bring-up.
The default is to use glamor.
The following driver Option is supported for glamor :
Option 34ShadowPrimary34 34boolean34
This option enables a so-called "shadow primary" buffer
for fast CPU access to pixel data, and separate scanout
buffers for each display controller (CRTC). This may
improve performance for some 2D workloads, potentially
at the expense of other (e.g. 3D, video) workloads.
Note in particular that enabling this option currently
disables page flipping. The default is off.
SEE ALSO
Xorg(1), xorg.conf(5), Xserver(1), X(7)
1. Wiki page:
https://www.x.org/wiki/radeon
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2. Overview about amdgpu development code:
https://cgit.freedesktop.org/xorg/driver/xf86-video-
amdgpu/
3. Mailing list:
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
4. IRC channel:
#radeon on irc.freenode.net
5. Query the bugtracker for amdgpu bugs:
https://bugs.freedesktop.org/query.cgi?product=xorg&component=Driver/AMDgpu
6. Submit bugs & patches:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Driver/AMDgpu
AUTHORS
Authors include:
Michel D:anzer michel@daenzer.net
Alex Deucher alexdeucher@gmail.com
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