2014-09-03 10:15 GMT+02:00 Dong Aisheng <dongas86@xxxxxxxxx>: > Hi JM, Hi Dong, > On Tue, Sep 2, 2014 at 11:10 PM, Jean-Michel Hautbois > <jhautbois@xxxxxxxxx> wrote: >> 2014-09-02 11:20 GMT+02:00 Jean-Michel Hautbois >> <jean-michel.hautbois@xxxxxxxxxxx>: >>> Hi there, >>> >>> I start a new thread, as I have done lots of test and this will be clearer. >>> I have problems reading and writing eMMC on my i.MX6 board with 3.17-rc3. >>> Sometimes I don't have read errors explicitly in dmesg, but fdisk has >>> no effects. >>> I activated MMC debug in my config file, and here is an extract of >>> mmc0 register dump and all mmc1 part. >>> On Freescale kernel, I confirm it works well with the same board and >>> sample, I can write a partition on mmc1. >> > > My iMX6Q SabreSD board seems ok. > What board did you use? > What reading/writing problems did you meet? > I did not see errors in your log. > Can you paste the error log? This is a custom board. You are right, activating debug seems to make the problem disappear... I have CRC errors and my CMD signal is quite bad when this is happening. I asked an HW engineer to look at this. I also double checked the pads, and added the MX6QDL_PAD_NANDF_ALE__SD4_RESET pad, but the reset signal is always down when doing this, when it should go down then up... Thanks, JM -- 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
