Hi Philip, > which MMC driver are you using. According to boot message, it seems sdhci.c is loaded. Do I add only "mmc->caps |= MMC_CAP_BUS_WIDTH_TEST" in sdhc.c ? Thanks, ----------------------------------------- Tomoya MORINAGA OKI SEMICONDUCTOR CO., LTD. > -----Original Message----- > From: Philip Rakity [mailto:prakity@xxxxxxxxxxx] > Sent: Thursday, January 27, 2011 10:44 AM > To: Tomoya MORINAGA > Cc: Chris Ball; Kyungmin Park; linux-mmc@xxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx; > andrew.chih.howe.khor@xxxxxxxxx; kok.howg.ewe@xxxxxxxxx; > Toshiharu Okada > Subject: Re: A MMC card transfer issue > > > There is no good answer. > > Doing this patch for 2.6.20 or so a long time ago had > problems because some controllers did not work. The failures > were equally unpleasant. > > The failure you see today is at least not a regression since > 1 bit did not work before. > > We hope that developers who know their h/w works add the CAP. > > > On Jan 26, 2011, at 5:31 PM, Tomoya MORINAGA wrote: > > > Hi Philip, > > > >> which MMC driver are you using. > > Could you teach me how to get the information ? > > > >> you need to have the driver or the low level code enable > this QUIRK. > > BTW, Is the above permanent treatment? > > I think modifying kernel source code isn't preferred. > > > > Thanks, > > ----------------------------------------- > > Tomoya MORINAGA > > OKI SEMICONDUCTOR CO., LTD. > > > >> -----Original Message----- > >> From: Philip Rakity [mailto:prakity@xxxxxxxxxxx] > >> Sent: Thursday, January 27, 2011 10:04 AM > >> To: Tomoya MORINAGA > >> Cc: Chris Ball; Kyungmin Park; linux-mmc@xxxxxxxxxxxxxxx; > >> linux-kernel@xxxxxxxxxxxxxxx; andrew.chih.howe.khor@xxxxxxxxx; > >> kok.howg.ewe@xxxxxxxxx > >> Subject: Re: A MMC card transfer issue > >> > >> > >> yes > >> > >> you need to have the driver or the low level code enable > this QUIRK. > >> > >> which mmc driver are you using. > >> > >> On Jan 26, 2011, at 5:00 PM, Tomoya MORINAGA wrote: > >> > >>> Hi Philip, > >>> > >>> On Thursday, January 27, 2011 12:42 AM, Philip Rakity wrote: > >>>> Did you define the CAP for BUS WIDTH ? > >>>> > >>>> MMC_CAP_BUS_WIDTH_TEST > >>>> > >>>> in the driver or the platform driver ? > >>> > >>> Let me make the above meaning clear. > >>> > >>> I don't modify kernel source code "drivers/mmc" at all Is > the above > >>> mean I must modify something kernel source code ? > >>> > >>> Thanks, > >>> ----------------------------------------- > >>> Tomoya MORINAGA > >>> OKI SEMICONDUCTOR CO., LTD. > >>> > >> > > > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
