Felipe, < afaict, endpoint interrupt is generated case we get a short packet. Then < dma engine won't send that last short packet and an enpoint interrupt < will be generated, from that point you decide if you wanna use PIO or < reprogram the dma for mode 0. DaVinci CPPI TX DMA requires operating in Mode 1 and only DMA interrupts are raised and endpoint interrupts are not raised (excepting under error conditions). Regards Swami (Type "pspproducts" in you web browser for PSP info) http://dbdwss01.india.ti.com/pspproducts/ PSP downloads at : http://software.ti.com/swcoe/intranet/reports/pds/PSP_releases.php Office : +91-80-25048629 -----Original Message----- From: Felipe Balbi [mailto:felipe.balbi@xxxxxxxxx] Sent: Friday, August 22, 2008 12:53 PM To: Subbrathnam, Swaminathan Cc: Dmitry Krivoschekov; linux-omap@xxxxxxxxxxxxxxx; linux-usb@xxxxxxxxxxxxxxx; felipe.balbi@xxxxxxxxx Subject: Re: Patch [2/2] DaVinci CPPI TX DMA tasklet On Fri, Aug 22, 2008 at 07:01:26AM +0530, ext Subbrathnam, Swaminathan wrote: > <Swami> When in DMA mode (mode 1) Endpoint interrupt does not get > generated (only DMA completion interrupt) and hence cannot rely on that. afaict, endpoint interrupt is generated case we get a short packet. Then dma engine won't send that last short packet and an enpoint interrupt will be generated, from that point you decide if you wanna use PIO or reprogram the dma for mode 0. -- balbi -- 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
