I will try to as clear as possible. When I reset, this is a complete reset of the board. I tried Freescale's kernel version, and it works, even after reset and several minutes. The same sample, the same board, but with a 3.17-rc2 kernel, I get those errors would say about 95% of times. The first but can be ok, but this is not invariable...
On another board, with another sample, it has the same problem, but I would say about 80% of times. I tried to use dynamic debug on boot in order to get all dev_dbg messages, but for the moment I don't have them... Thanks, JM 2014-08-28 16:20 GMT+02:00 Hsin-Hsiang Tseng <[email protected]>: > No matter which sample you changed to test has this issue? > > Is your reboot means only re-init eMMC or entire platform? > If you re-init eMMC by your customized flow, you need to guarantee the > frequency and bus-width between host and device. > > > 2014-08-28 15:28 GMT+08:00 Jean-Michel Hautbois > <[email protected]>: >> Hi, >> >> 2014-08-09 11:05 GMT+02:00 Hsin-Hsiang Tseng <[email protected]>: >>> Could you change another sample to test? >>> As a result, we can check this is a driver issue or sample issue. >> >> I can change whatever you want :). I noticed that on first boot it >> seems to be working fine, but after some minutes, if I reboot (POR or >> poweroff/poweron) I have those messages. >> >>>> [ 4.518732] mmc0: req done (CMD18): 0: 00000900 00000000 00000000 >>>> 00000000 >>>> [ 4.518746] mmc0: 4096 bytes transferred: 0 >>>> [ 4.518756] mmc0: (CMD12): 0: 00000b00 00000000 00000000 00000000 >>> the eMMC has change state to data state(0xb00) and the data transferred 0... >>> It means the cmd and clk pin work well. I will check the DMA and data >>> lines(pin). >>>> [ 4.518545] mmc1: req done (CMD17): 0: 00000900 00000000 00000000 >>>> 00000000 >>>> [ 4.518563] mmc1: 0 bytes transferred: -84 >>> No data transferred from your platform to eMMC....even use single block >>> read. >> >> What is the next step ? BTW, I am now on the latest 3.17-rc2 tag. >> >> Thanks, >> JM -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
