Linux 2.6.39.4 in a AT91SAM9M10G45-EK 10 Mbytes dma buffer allocatiion

[Jean-Christophe PLAGNIOL-VILLARD]

On 14:39 Fri 24 May     , Marcio wrote:
> Aptina MTP031
the 9g45 can only be use up to 4Mpx on ISI you use a 5Mpx censor

Best Regards,
J.
> 
> Enviado via iPhone
> 
> Em 24/05/2013, às 14:37, Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> escreveu:
> 
> > 
> > On May 25, 2013, at 1:35 AM, Marcio Lima <marcio.lima54 at gmail.com> wrote:
> > 
> >> Thanks Jean
> >> 
> >> the image takes 10 Mbytes to be stored!
> > 
> > what sensor do you use?
> > 
> > 4Mpx?
> > 
> > Best Regards,
> > J.
> >> 
> >> Regards
> >> Marcio
> >> 
> >> Enviado via iPhone
> >> 
> >> Em 24/05/2013, às 14:19, Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> escreveu:
> >> 
> >>> On 09:35 Fri 24 May     , Marcio Campos de Lima wrote:
> >>>> 
> >>>> 
> >>>> 
> >>>> 
> >>>> Hi
> >>>> I am running Linux 2.6.39.4 in a AT91SAM9M10G45-EK platfarm. I need to
> >>>> allocate 10 Mbytes dma buffer to capture an image from a CMOS sensor. The
> >>>> board has 128Mbytes of total memory and 110 Mbytes of free memory. Can
> >>>> anybody help me?
> >>>> Thanks
> >>>> MArcio
> >>> 
> >>> 10MiB? why that much?
> >>> 
> >>> you can not allowcate thar much on dma_alloc_coherent you need to use CMA
> >>> 
> >>> Best Regards,
> >>> J.
> >>>> 
> >>>> at mm/page_alloc.c:2033 __alloc_pages_nodemask+0x140/0x5f8)
> >>>> ht      = 19Modules linked
> >>>> in:44;                                               
> >>>> 
> >>>> 
> >>>> fmt.fmt.pix.[] (unwind_backtrace+0x0/0xe4) from [] (warn_sl)
> >>>> pixelformat [] (warn_slowpath_common+0x4c/0x64) from [] (wa)
> >>>> =30314742;                                                                  
> >>>> 
> >>>> f[] (warn_slowpath_null+0x18/0x1c) from [] (__alloc_pages_n)
> >>>> mt.fmt.pix.fiel[] (__alloc_pages_nodemask+0x140/0x5f8) from [d       =
> >>>> c72b2[] (__dma_alloc+0x94/0x2d8) from [] (dma_all)
> >>>> cc8                                                                         
> >>>> 
> >>>> MARCIO[] (dma_alloc_coherent+0x54/0x60) from [] (vb2_dma_co)
> >>>> : init_mmap: i[] (vb2_dma_contig_alloc+0x38/0xb4) from [] ()
> >>>> nit                                                                         
> >>>> 
> >>>> [] (vb2_reqbufs+0x3b4/0x750) from [] (soc_camera_reqbufs+0x)
> >>>> [] (soc_camera_reqbufs+0xbc/0x134) from [] (__video_do_ioct)
> >>>> [] (__video_do_ioctl+0x1de0/0x4a24) from [] (video_usercopy)
> >>>> [] (video_usercopy+0x358/0x48c) from [] (v4l2_ioctl+0x68/0x)
> >>>> [] (v4l2_ioctl+0x68/0x114) from [] (vfs_ioctl+0x20/0x3c)    
> >>>> [] (vfs_ioctl+0x20/0x3c) from [] (do_vfs_ioctl+0x520/0x578) 
> >>>> [] (do_vfs_ioctl+0x520/0x578) from [] (sys_ioctl+0x34/0x54) 
> >>>> [] (sys_ioctl+0x34/0x54) from [] (ret_fast_syscall+0x0/0x2c)
> >>>> ---[ end trace acfd933d374f6f12
> >>>> ]---                                            
> >>>> atmel_isi atmel_isi.0: dma_alloc_coherent of size 10077696
> >>>> failed               
> >>>> MARCIO: __vb2_queue_alloc
> >>>> ret=-12                                               
> >>>> MARCIO: __vb2_queue_alloc
> >>>> q->num_buffers=0                                      
> >>>> MARCIO: vb2_reqbufs req->count=2 ret=0
> >>>> num_buffers=1                            
> >>>> MARCIO: vb2_reqbufs req->count=2 num_buffers=1
> >>>> ret=0                            
> >>>> MARCIO:vb2_reqbufs soc_camera_reqbufs ret=-12 icd->vb2_vidq=1 
> >>>> p=1              
> >>>> MARCIO:soc_camera_reqbufs
> >>>> ret=-12                                               
> >>>> VIDIOC_REQBUFS error 12, Out of memory
> >>>> 
> >>>> 
> >>>> 
> >>>> _______________________________________________
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> >>>> linux-arm-kernel at lists.infradead.org
> >>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> >>> 
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