I want to use 1920x1080 (or more) on my custom Zynq-7000 Board. Mode 1024x768 works nice.
There is CMA allocation error, when I try to use FullHD. I added some output to source code (output below is for 2560x1600, it is the same for 1920x1080, excepting buffer size):
[12:09:34:466] xlnx-pl-disp amba_pl:xlnx_pl_disp: surface width(2560), height(1600) and bpp(24)
[12:09:34:474] xlnx-pl-disp amba_pl:xlnx_pl_disp: bytes per line after alignment: 12288000
[12:09:34:480] xlnx-pl-disp amba_pl:xlnx_pl_disp: allocating 12288000 bytes with kzalloc()...
[12:09:34:488] xlnx-pl-disp amba_pl:xlnx_pl_disp: OK
[12:09:34:491] xlnx-pl-disp amba_pl:xlnx_pl_disp: init gem object...
[12:09:34:497] xlnx-pl-disp amba_pl:xlnx_pl_disp: OK
[12:09:34:500] xlnx-pl-disp amba_pl:xlnx_pl_disp: creating mmap offset...
[12:09:34:505] xlnx-pl-disp amba_pl:xlnx_pl_disp: OK
[12:09:34:508] xlnx-pl-disp amba_pl:xlnx_pl_disp: gem cma created with size 12288000
[12:09:34:514] xlnx-pl-disp amba_pl:xlnx_pl_disp: failed to allocate buffer with size 12288000
[12:09:34:522] xlnx-pl-disp amba_pl:xlnx_pl_disp: Failed to create cma gem object (12288000 bytes)
[12:09:34:527] xlnx-pl-disp amba_pl:xlnx_pl_disp: drm_fb_helper_single_fb_probe() returns -12
[12:09:34:536] xlnx-pl-disp amba_pl:xlnx_pl_disp: Failed to set initial hw configuration.
[12:09:34:541] xlnx-pl-disp amba_pl:xlnx_pl_disp: failed to initialize drm fb
As I see, the issue goes from this line (drm_gem_cma_helper.c)
cma_obj->vaddr = dma_alloc_wc(drm->dev, size, &cma_obj->paddr,GFP_KERNEL | __GFP_NOWARN);
I try to change some settings:
- increase CMA Size in Kernel config (it was 128, now 256 Mb)
- increase CMA Areas number in Kernel config (from 7 to 20)
- add reserved memory to Device Tree
- add coherent_pool option to bootargs
I get the same fault anyway.
Please help to find the reason and solve my issue.
Many thanks!
With regards, Maksim
