Hi all: I currently have a Qt5 app that runs fine with `./app -platform eglfs` with `WindowSystem=libpvrPVR2D_FRONTWSEGL.so.1` in /etc/powervr.ini _except_ for the tearing to the screen that is visible in horizontal motion.
Switching to `WindowSystem=libpvrPVR2D_FLIPWSEGL.so.1` does eliminate the tearing, but also introduces noticable lag in dragging the horizontal list. It also causes the displayed colors to increase and decrease in intensity fairly quickly which the dragging (and the resulting updating of the screen) is occuring. I've also noted that running `sgx_flip_test` results in FAIL - PVRSRV_ERROR_TOOMANYBUFFERS (full output here: https://gist.github.com/e8a4902e4ae33ef6ed49 ) Based on this, I've considered that perhaps the sgx or associated drivers doesn't have enough ram, so I've added `cma=64M vram=32M` to the kernel command line. Unfortunately, this doesn't appear to have any affect on the behavior (though the ram amount does look like it shows up in `sgx_flip_test`'s output that lists avaliable memory). At this point it looks like the problem is (from `sgx_flip_test`'s output) that "MaxSwapChainBuffers:2" needs to be a larger value than '2'. What things affect the max swap chain buffers? Is there something else causing awful performance with FLIP? Or am I way off base here? Some more info: root@ikabit:~# fbset -i mode "480x272" geometry 480 272 480 816 32 timings 0 0 0 0 0 0 0 accel true rgba 8/16,8/8,8/0,8/24 endmode Frame buffer device information: Name : Address : 0x98100000 Size : 1566720 Type : PACKED PIXELS Visual : TRUECOLOR XPanStep : 1 YPanStep : 1 YWrapStep : 0 LineLength : 1920 Accelerator : No root@ikabit:~# uname -a Linux ikabit 3.19.8-yocto-standard #1 PREEMPT Wed Jul 1 12:29:13 EDT 2015 armv7l GNU/Linux root@ikabit:~# cat /proc/pvr/ nodes queue version root@ikabit:~# cat /proc/pvr/version Version SGX_DDK_Linux_CustomerTI sgxddk 1.10@2359475 (release) /home/cody/obj/y/tmp/work/beaglebone-poky-linux-gnueabi/omap3-sgx-modules/5.01.01.02-b/Graphics_SDK_5_01_01_02/GFX_Linux_KM System Version String: SGX revision = 125 Note: I'm running the version of SGX shipped by the meta-ti layer. -- 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/d/optout.
