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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