eMMC I/O error

[FrankPCP]

Hi All,
We made a customize TK1 board, and it used two different eMMC. One is same as TK1 dev board used(Sandisk SDINBDE4), the other one is Sandisk SDINBDG4. When I run this command “sudo fstrim /”, the one which uses Sandisk SDIN8DG4 eMMC will show errors below. But there is no errors in the board with Sandisk SDINBDE4. I would like to know if there is any parameter need to be fine tune when we use eMMC different with TK1 dev board ?

ubuntu@tegra-ubuntu:~$ sudo fstrim /
[sudo] password for ubuntu:
[  480.966165] end_request: I/O error, dev mmcblk0, sector 190376
[  480.974166] end_request: I/O error, dev mmcblk0, sector 1858968
[  480.980376] end_request: I/O error, dev mmcblk0, sector 1937432
[  480.986542] end_request: I/O error, dev mmcblk0, sector 2074128
[  480.992839] end_request: I/O error, dev mmcblk0, sector 2334248
[  480.999057] end_request: I/O error, dev mmcblk0, sector 2367832
[  481.005068] end_request: I/O error, dev mmcblk0, sector 2410592
[  481.011269] end_request: I/O error, dev mmcblk0, sector 2467904
[  481.017309] end_request: I/O error, dev mmcblk0, sector 2550176
[  481.023433] end_request: I/O error, dev mmcblk0, sector 2722672
ubuntu@tegra-ubuntu:~$

[WayneWWW]

Not sure if this helps, please check.

Custom Tegra K1 board MMC problem

We are having the same booting problem on our board. Where can we find information on writing board_info in to the EEPROM from u-boot what value do we write in the config file with the CONFIG_SERIAL_EEPROM?? Our board id etc is being read as 0xffff:0xffff:0xff:0x40:0xff Brian

[FrankPCP]

Hi WayneWWW,
I did the changes as below and this issue has been fixed.
I find the root cause is that sec_feature_support is zero when the ext_csd version is higher than 6.
I check this function “mmc_read_ext_csd” on linx kernel git server and don’t see the same codes.
So I would like to know if there has any special reason for Nvidia doing this changes!?

diff --git a/kernel/drivers/mmc/core/mmc.c b/kernel/drivers/mmc/core/mmc.c
index 3e1cabd21..5e6005530 100644
--- a/kernel/drivers/mmc/core/mmc.c
+++ b/kernel/drivers/mmc/core/mmc.c
@@ -447,6 +447,7 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
                        }
                }
 
+#if 0
                if (card->ext_csd.rev < 6) {
                        card->ext_csd.sec_trim_mult =
                                ext_csd[EXT_CSD_SEC_TRIM_MULT];
@@ -464,6 +465,15 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 
                card->ext_csd.trim_timeout = 300 *
                        ext_csd[EXT_CSD_TRIM_MULT];
+#endif
+               card->ext_csd.sec_trim_mult =
+                       ext_csd[EXT_CSD_SEC_TRIM_MULT];
+               card->ext_csd.sec_erase_mult =
+                       ext_csd[EXT_CSD_SEC_ERASE_MULT];
+               card->ext_csd.sec_feature_support =
+                       ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
+               card->ext_csd.trim_timeout = 300 *
+                       ext_csd[EXT_CSD_TRIM_MULT];