From ae92d1765fa370a8d94c2856ad6c45d273ec3c69 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Michel=20D=C3=A4nzer?= Date: Wed, 18 Mar 2015 16:23:24 +0900 Subject: glamor: Add Option "ShadowPrimary" v2 When this option is enabled, most pixmaps (including the screen pixmap) are allocated in system RAM and mostly accessed by the CPU. Changed areas of the screen pixmap are copied to dedicated per-CRTC scanout pixmaps regularly, triggered by the vblank interrupt. v2: * Set region data pointer to NULL for keeping only the extents * Move pRegion and pBox local variable declarations closer to their uses in drmmode_set_mode_major() --- man/radeon.man | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'man') diff --git a/man/radeon.man b/man/radeon.man index 6e46f894..27037730 100644 --- a/man/radeon.man +++ b/man/radeon.man @@ -286,6 +286,22 @@ Chooses between available acceleration architectures. Valid values are as of TAHITI, otherwise .B EXA. +.PP +The following driver +.B Options +are 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. + .PP The following driver .B Options -- cgit v1.2.3