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-rw-r--r--man/amdgpu.man35
1 files changed, 26 insertions, 9 deletions
diff --git a/man/amdgpu.man b/man/amdgpu.man
index bc7bf30..d280197 100644
--- a/man/amdgpu.man
+++ b/man/amdgpu.man
@@ -50,15 +50,7 @@ Enables or disables all hardware acceleration.
The default is to
.B enable
hardware acceleration.
-.TP
-.BI "Option \*qAccelMethod\*q \*q" string \*q
-Setting this option to
-.B 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.
-.br
-The default is to use glamor.
+
.TP
.BI "Option \*qZaphodHeads\*q \*q" string \*q
Specify the RandR output(s) to use with zaphod mode for a particular driver
@@ -77,6 +69,31 @@ Enable the DRI3 extension. The default is
.BI "Option \*qEnablePageFlip\*q \*q" boolean \*q
Enable DRI2 page flipping. The default is
.B on.
+.TP
+.BI "Option \*qAccelMethod\*q \*q" string \*q
+Setting this option to
+.B 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.
+.br
+The default is to use glamor.
+
+.PP
+The following driver
+.B Option
+is supported for
+.B glamor
+:
+.TP
+.BI "Option \*qShadowPrimary\*q \*q" boolean \*q
+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
+.B off.
.SH SEE ALSO
__xservername__(__appmansuffix__), __xconfigfile__(__filemansuffix__), Xserver(__appmansuffix__), X(__miscmansuffix__)