bionic (4) amdgpu.4.gz

NAME

       amdgpu - AMD RADEON GPU video driver

SYNOPSIS

       Section "Device"
         Identifier "devname"
         Driver "amdgpu"
         ...
       EndSection

DESCRIPTION

       amdgpu is an Xorg driver for AMD RADEON-based video cards with the following features:

       • Support for 8-, 15-, 16-, 24- and 30-bit pixel depths;
       • RandR support up to version 1.4;
       • 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 "SWcursor" "boolean"
              Selects software cursor.  The default is off.

       Option "Accel" "boolean"
              Enables or disables all hardware acceleration.
              The default is on.

       Option "ZaphodHeads" "string"
              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 "ZaphodHeads" "LVDS,VGA-0" will assign xrandr outputs LVDS and VGA-0 to this
              instance of the driver.

       Option "DRI" "integer"
              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 DRI2.

       Option "EnablePageFlip" "boolean"
              Enable DRI2 page flipping.  The default is on.

       Option "TearFree" "boolean"
              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  TearFree  on. Two separate scanout buffers need to be allocated 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
              TearFree is on for rotated outputs, outputs with RandR transforms applied and for RandR 1.4  slave
              outputs, otherwise off.

       Option "VariableRefresh" "boolean"
              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 "AccelMethod" "string"
              Setting this option to none disables use of the glamor acceleration architecture.  In  that  case,
              all  2D  rendering 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 "ShadowPrimary" "boolean"
              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

        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 Dänzer            michel@daenzer.net
       Alex Deucher             alexdeucher@gmail.com