On Thu, Sep 26, 2013 at 2:54 PM, garyamort <[email protected]> wrote: > As a stick in the ground, I wanted to provide a quick summary of video > drivers for the BeagleBoneBlack. > > There is the Xorg Kernel Mode Setting Driver : an extremely basic frame > buffer driver and the fallback driver if no better Xorg driver is found. It > has extremely limited functionality and does not support screen rotation. > > There is the Xorg fbdev Driver: a still basic frame buffer driver, but it > does support some configuration options including rotate. > > There is the tilcdc Driver: Released by Ron Clark at the beginning of 2013. > http://lwn.net/Articles/533731/ This driver, if installed, is configured > via the Device Tree. For example, see the BB-BONE-LCD7-*.dts files. These > files contain the pin connection info and the LCD display configuration > information and will be used by the tilcdc driver to configure the display. > Note: I do not know what configuration options are supported for userland > configuration[ie setting rotation on bootup, or configuring rotation in the > Xorg.conf file] This drivers sourcecode is located at drivers/gpu/tilcdc > > There is the omap frame buffer driver: Located at drivers/video/omap This > driver requires LCD panel configuration information which is available for > some LCD panels in the same directory as the driver. Does this work for the > BeagleBoneBlack?
No... different IP block... tilcdc != video/omap > There is the omap2 frame buffer driver: Located at > drivers/video/omap2/omapfb. This driver requires LCD panel configuration, > of which many are already written - see drivers/video/omap2/displays for > them. Does this work for the BeagleBoneBlack? No... different IP block... tilcdc != omapfb > There is the PVRSRVKVM Driver: Uses the built in SGX graphcis processor to > accelerate graphics processing and offload processing from the CPU. This > driver may not work under Linux Kernel version 3.8. According to the > latest release notes, http://processors.wiki.ti.com/index.php/RN_4_10_00_01, > version 4.10.00.01 works for the Linux 3.8 kernel. From the release notes: > > Validation information > > NOTE - > > 1. This release has been tested on AM parts only. > > 2. This release is build tested only for 387x(TI814x) & 389x(TI816x) & DM > parts. > > 3. This release is build tested only against 3.8 kernel. > > > The BBB uses a 335x processor, not 387x or 389x - so it does not appear that > it has been tested for the BBB, but it has been tested for the 3.8 kernel. > > Also note that the above statement is contradicted later in the release > notes by: > > Kernel(Linux PSP) versions supported or used for validation > > Please note that this release has been tested only on AM devices. No testing > has been done on the DM parts. Only the following devices have been tested & > details below - > > AM335x - 3.2 kernel - http://arago-project.org/git/projects/linux-am33x.git > > AM335x Linux PSP 04.06.00.10 > Branch – v3.2-staging, TAG - v3.2_AM335xPSP_04.06.00.10-rc1, commit id > -c8cce6279f5c126cbf6b6054f1ea0148bfc19511 > > AM35xx/AM37xx - 2.6.37 kernel > > Linux PSP Release : 04.02.00.07. > Display drivers with DSS2 support ie, CONFIG_OMAP2_DSS=y > > > > > My assumption is that the earlier statement overrides the later statement. > > To add to the confusion, many of these drivers are used in combination. > For example, you might have both the Omap 2 Framebuffer Driver AND the SGX > Driver installed. The SGX driver overrides some of the functions in the > Omap driver(?). Xorg configuration would be for the Omap driver, not the > SGX driver[?] > > Please correct any of my misassumptions in the above. The am335x parts do not have the IP block to use the omap/omapfb driver. They have an extended/ehanced version of the DaVanci DA8XX.. https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/video/da8xx-fb.h Regards, -- Robert Nelson http://www.rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
