From: ext Gary Thomas <gary@xxxxxxxxxxxx> Subject: Re: ISP buffer issue Date: Thu, 6 Aug 2009 16:30:29 +0200 > Gary Thomas wrote: > > I'm having trouble with the OMAP3 camera (ISP) support when > > I have a large sensor. I'm working with a 3M CCD sensor which > > has a native resolution of 2048x1536. The problem is when I > > run V4L2 code which tries to allocate & map buffers for input > > streaming. If the frame is much bigger than PAL size (720x576) > > the system hangs. > > > > I traced this into the ISP layer and found that when the > > buffer being allocated is over 1MB, this happens: > > isp_tmp_buf_alloc: allocating 1531904 bytes > > which eventually fails in iommu_vmalloc() > > > > Looking at the code, there seems to be some magic here - the > > buffer allocation falls over if the request is large. I'm > > working from this code: > > http://arago-project.org/git/people/vaibhav/ti-psp-omap-video.git > > starting from commit (ti_display head on 2009-07-23) > > 6810d6d683e768c3bc6b5647c214804045665e22 > > Hiroshi - I CC'd you directly as this code seems to be yours. > Could you comment on my problem? Can you point out which function returns error in iommu_vmalloc()? -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
