Re: davinci_mmc issues on kernel 3.17.0

[Angelo Dureghello <angelo70@gmail.com>]

Sorry for the confusion,

i realized the card i use in the old kernel board is 8G, the one in 
kernel 3.17.0 is 4G,
so the size / inodes i see in mkfs or fdisk are correct.

I can confirm i have issues on the "write" part. With whatever FS,
if i format the card on PC, and then
fsck on the arm device board with kernel 3.17.0, fsck find no errors.
While if i mkfs on kernel 3.17.0 and then put the card on PC, it can't 
even be mounted,
and fsck gives errors.

I finally run mmc_test, in both PIO 4-bit and DMA 4-bit modes:

in PIO, all tests pass except 17
[root@barix boot]# echo 17 > /sys/kernel/debug/mmc0/mmc0\:0002/test
mmc0: Starting tests of card mmc0:0002...
mmc0: Test case 17. Correct xfer_size at write (midway failure)...
mmc0: Result: ERROR (-84)
mmc0: Tests completed

in DMA, test 17 fails too, and test 25 locks up.

[root@barix boot]# echo 17 > /sys/kernel/debug/mmc0/mmc0\:0002/test
mmc0: Starting tests of card mmc0:0002...
mmc0: Test case 17. Correct xfer_size at write (midway failure)...
mmc0: Result: ERROR (-84)
mmc0: Tests completed.

[root@barix boot]# echo 25 > /sys/kernel/debug/mmc0/mmc0\:0002/test
mmc0: Starting tests of card mmc0:0002...
mmc0: Test case 25. Best-case read performance into scattered pages...
edma-dma-engine edma-dma-engine.1: edma_prep_slave_sg: Failed to 
allocate slot


so seems i have some additional dma issue.

regards