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2b96c18165
An attempt to workaround the incoherency in gen2 chipsets, we avoid using dynamic reallocation as much as possible. The first step is to disable allocation of pixmaps using GEM and simply create them in system memory without a backing buffer object. This forces all rendering to use S/W fallbacks. The second step is to allocate a shadow front buffer and assign that to the Screen pixmap. This ensure that the front buffer remains in the GTT and pinned for scanout. The shadow buffer will be rendered to in the normal fashion via the Screen pixmap, and be marked dirty. In the block handler, the dirty shadow buffer is then blitted (using the GPU) over the front buffer. This should completely avoid having to move pages around in the GTT and avoid incurring the wrath of those early chipsets. Secondly, performance should be reasonable as we avoid the ping-pong caused by the small aperture and weak GPU forcing software fallbacks. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
xf86-video-intel Open-source X.org graphics driver for Intel graphics http://www.intellinuxgraphics.com/ What is xf86-video-intel ------------------------ The xf86-video-intel module is an open-source 2D graphics driver for the X Window System as implemented by X.org. It supports a variety of Intel graphics chipsets including: i810/i810e/i810-dc100,i815, i830M,845G,852GM,855GM,865G, 915G/GM,945G/GM/GME,946GZ G/GM/GME/Q965, G/Q33,G/Q35,G41,G/Q43,G/GM/Q45 PineView-M (Atom N400 series) PineView-D (Atom D400/D500 series) Where to get more information about the driver ---------------------------------------------- The primary source of information about this and other open-source drivers for Intel graphics is: http://intellinuxgraphics.org/ Documentation specific to the xf86-video-intel driver including possible configuration options for the xorg.conf file can be found in the intel(4) manual page. After installing the driver this documentation can be read with the following command: man intel Mailing list for communication with users and developers of xf86-video-intel: intel-gfx@lists.freedesktop.org Note: Subscription is required before posting, but anyone is free to subscribe. See instructions (and archives) here: http://lists.freedesktop.org/mailman/listinfo/intel-gfx To report bugs encountered with the driver, see: http://intellinuxgraphics.org/how_to_report_bug.html To see bugs that are targeted to be fixed in the next release: https://bugs.freedesktop.org/show_bug.cgi?id=intel-2d-release