From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 2 Aug 2011 15:16:08 +0800 From: Shawn Guo To: Huang Shijie Subject: Re: [PATCH v8 0/3] add the GPMI controller driver for IMX23/IMX28 Message-ID: <20110802071607.GA17297@freescale.com> References: <20110722055731.GI26837@S2100-06.ap.freescale.net> <4E292FCF.6010608@freescale.com> <4E2F6F90.7030207@freescale.com> <20018.24364.787244.956361@ipc1.ka-ro> <4E32823C.3060007@freescale.com> <4E37970C.4070903@freescale.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4E37970C.4070903@freescale.com> Cc: arnd@arndb.de, dedekind1@gmail.com, Koen Beel , Wolfram Sang , linux-mtd@lists.infradead.org, shijie8@gmail.com, linux-arm-kernel@lists.infradead.org, Lothar =?iso-8859-1?Q?Wa=DFmann?= List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Aug 02, 2011 at 02:19:56PM +0800, Huang Shijie wrote: > Hi, > >On Fri, Jul 29, 2011 at 11:49 AM, Huang Shijie wrote: > >>于 2011年07月29日 15:40, Koen Beel 写道: > >>>Hi, > >>> > >>>On Fri, Jul 29, 2011 at 9:20 AM, Lothar Waßmann > >>> wrote: > >>>>Hi, > >>>> > >>>>Koen Beel writes: > >>>>>Hi, > >>>>> > >>>>>I have test on mx23evk board. Still see the same issues. > >>>>> > >>>>>On Wed, Jul 27, 2011 at 3:53 AM, Huang Shijie > >>>>> wrote: > >>>>>>Hi, > >>>>>> > >>>>>>Thanks for your test. > >>>>>> > >>>>>>>Hi, > >>>>>>> > >>>>>>>It's not really working for me. > >>>>>>>I've applied all gpmi-nand driver patches and the dma driver patches. > >>>>>>> > >>>>>>>I have added following kernel parameters: > >>>>>>>mtdparts=gpmi-nand:20m(boot),-(user) ubi.mtd=1 root=ubi0:rootfs0 > >>>>>>>rootfstype=ubifs gpmi_debug_init > >>>>>>> > >>>>>>>During boot I get already get DMA timeout: > >>>>>>>[ 2.560000] [ start_dma_without_bch_irq : 392 ] DMA timeout, last > >>>>>>>DMA > >>>>>>>:1 > >>>>>>>[ 3.560000] [ start_dma_with_bch_irq : 427 ] bch timeout!!! > >>>>>>>... > >>>>>>>(see log file in attach line 89) > >>>>>I still see this DMA timeout when booting. > >>>>>What kernel parameters do you use? I still use same as above. > >>>>> > >>>>Do you have an SD card in the system? I'm getting the same error when > >>>>accessing an SD card. Without SD card I can use the flash without any > >>>>errors. > >>>No SD card in the system. At least not on my mx23evk board. > >>>My real target hardware has a SDIO wifi chip. > >>Does it conflict with the GPMI? > >Well I don't know if it conflicts. From what Lothar says I assume > >there might be a conflict between gpmi and sdio. > Yes, the conflict between gpmi and other module(such as SD in MX6Q) > is THE prime reason > which caused the DMA timeout. > > I am debuging the IMX6Q now, and meet the same problem. > I do not follow on this. SD on i.mx6q does not use apbh-dma at all. How will it conflict with gpmi regarding to dma timeout? -- Regards, Shawn