Viral, I believe the patches that I am discussing about is maintained by TI seperately. Pl. refer to the support link that is available as part of the LSP documentation from TI. These patches would help you get a functional 2.6.10 usb driver. regards swami ________________________________________ From: vkm [viral.vkm@xxxxxxxxx] Sent: Thursday, November 26, 2009 1:47 PM To: Subbrathnam, Swaminathan; linux-usb@xxxxxxxxxxxxxxx Subject: Re: DaVinci MUSB controller with CPPI DMA Hi, Subbrathnam, Swaminathan wrote: > Viral, > > Did you happen to apply all the related patches on the 2.6.10 kernel from TI? I am not sure if I got you correctly or not. But, I am using (as I said) MVL 2.6.10_mvl401 Kernel and that has (if I understand correctly) 2.6.10 kernel + ./mvl_patches/mvl*1721*.patch I was looking for if any latest release available which may have more number of mvl*.patch and that might include CPPI DMA related fixes as well. Anyway, here is what I am planning to do: 1. Going through git log for *musb* on mainline kernel 2. Decide what are the patches relevant to musb and cppi DMA for iso transfer. 3. Study them to understand the logic change. Implement same logic change for 2.6.10 I am hopeful that I will make it fully functional if not getting drastic performance improvement. And I have already done a good start. I just *fixed* (or backported nicely) "musb_host_tx 1371: null urb, TXCSR2 = 3400" which I was getting on second time ISO transfer. I also came across this link, http://linux.omap.com/pipermail/davinci-linux-open-source/2008-June/006917.html Wherein you just mentioned that you have *forward port* 45 patches. I was also trying to look for those 45 patches which were for 2.6.10 as you mentioned. Thanks for the help again. Thanks, Viral > If not that would be the starting point. > > Regards > swami > > -----Original Message----- > From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb-owner@xxxxxxxxxxxxxxx] On Behalf Of vkm > Sent: Wednesday, November 25, 2009 11:07 AM > To: linux-usb@xxxxxxxxxxxxxxx > Subject: DaVinci MUSB controller with CPPI DMA > > Hi, > > I am doing development for some Audio USB device on TI's DaVinci DVM > 6446 board. I am using MVL 2.6.10_mvl401 kernel. > Being it USB Audio device, it does ISO transfer and this apparently > doesnt work if I have CPPI DMA enabled. > > I know there have been lots of work happened post 2.6.10 kernel and > there are certainly many bugs when you enable CPPI DMA. > I just would like to know if someone tried to *backport* all recent > fixes to 2.6.10. > Anyone from MV or TI ? Any help would be appreciated. > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > Email Scanned for Virus & Dangerous Content by : www.CleanMailGateway.com > > >-- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
