Hi Roger,
Thanks for the tests. I attached the files and commented in line... but at the bottom of this email I have some findings...
On Wed, May 17, 2023 at 04:30:55PM +0300, Roger Quadros wrote:
Hi Colin,
I just tested this on AM335x EVM which uses BCH8_CODE_HW but 8-bit NAND part. I see that you are using 16-bit NAND.
One more difference in u-boot configuration. For me: CONFIG_NAND_OMAP_GPMC_PREFETCH=y
Not sure if that matters but let's keep it set for now.
For debug can you please apply the patch (at end) to u-boot at commit a95410696d21 (before breakage) and run the test.
Test procedure:
nand dump 0
=> nand dump 0 Page 00000000 dump: 40 00 00 00 0c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 43 48 53 45 54 54 49 4e 47 53 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff c1 c0 c0 c0 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 dc 99 00 00 00 00 30 40 ff ff ff ea 1a 06 00 ea 00 00 0f e1 1f 10 00 e2 1a 00 31 e3 1f 00 c0 13 13 00 80 13 c0 00 80 e3 00 f0 29 e1 06 00 00 eb 1d 00 00 eb 8a 06 00 eb 15 0f 07 ee 9a 0f 07 ee 95 0f 07 ee 1e ff 2f e1 f0 ff ff ea 00 00 a0 e3 17 0f 08 ee 15 0f 07 ee d5 0f 07 ee 9a 0f 07 ee 95 0f 07 ee 10 0f 11 ee 02 0a c0 e3 07 00 c0 e3 02 00 80 e3 02 0b 80 e3 01 0a 80 e3 10 0f 01 ee 0e 50 a0 e1 10 1f 10 ee 21 3a a0 e1 0f 30 03 e2 0f 40 01 e2 03 22 a0 e1 02 20 84 e1 0c 00 9f e5 07 00 c0 e3 00 d0 a0 e1 05 f0 a0 e1 64 06 00 ea 00 df 30 40 06 4b 1b 68 1b 68 1b 68 1b 68 bf f3 5f 8f 04 4a 03 f0 1f 03 52 f8 23 00 70 47 00 bf 90 92 30 40 68 6f 30 40 01 4b 03 60 70 47 00 bf 28 86 30 40 00 20 70 47 30 b5 47 4b 19 68 03 f1 80 63 a3 f5 3b 43 99 42 79 d0 44 4a 91 42 0c bf 4f f0 9e 32 4f f0 7c 32 bf f3 5f 8f 40 4b 18 68 00 68 d0 f8 e4 00 02 60 bf f3 5f 8f 18 68 22 f4 c0 24 00 68 d0 f8 e8 00 02 60 bf f3 5f 8f 18 68 00 68 d0 f8 ec 00 04 60 bf f3 5f 8f 18 68 00 68 d0 f8 f0 50 33 48 28 60 bf f3 5f 8f 1d 68 2d 68 d5 f8 f4 50 2a 60 bf f3 5f 8f 1d 68 2d 68 d5 f8 f8 50 2a 60 bf f3 5f 8f 1a 68 12 68 d2 f8 fc 20 14 60 bf f3 5f 8f 1a 68 12 68 d2 f8 00 21 10 60 1a 68 12 68 92 6c 12 68 bf f3 5f 8f 92 b2 92 b9 bf f3 5f 8f 1a 68 12 68 d0 6c 1f 4a 02 60 bf f3 5f 8f 18 68 00 68 00 6d 02 60 bf f3 5f 8f 18 68 00 68 40 6d 02 60 1a 68 12 68 d2 f8 84 21 12 68 bf f3 5f 8f 3a b9 bf f3 5f 8f 1a 68 13 48 12 68 d2 f8 84 21 10 60 12 4a 91 42 0b d8 bf f3 5f 8f 1b 68 10 4a 1b 68 d3 f8 88 31 1a 60 30 bd 4f f0 1c 32 89 e7 1a 68 12 68 d2 f8 88 21 12 68 bf f3 5f 8f 00 2a ea d0 f1 e7 00 bc 30 40 00 02 30 44 90 92 30 40 0f 8c 88 a0 0f 04 01 04 10 01 4d 1c ff 00 60 44 00 40 08 99 08 b5 00 f0 50 fa 1f 4b 98 42 a3 f5 6f 03 a3 f2 93 43 31 d0 0a d8 1c 4a 90 42 19 d0 02 f5 80 12 01 32 90 42 17 d0 4f f0 ff 32 12 e0 17 4a 90 42 f9 d1 17 4a 12 68 bf f3 5f 8f 16 49 8a 42 1d d0 01 f1 00 51 a1 f5 1c 31 8a 42 19 d0 12 4a 00 e0 12 4a 1a 60 08 bd 0e 4a 12 68 bf f3 5f 8f 10 49 8a 42 05 d0 01 f1 80 51 8a 42 03 d0 0d 4a f0 e7 0d 4a ee e7 0d 4a ec e7 0d 4a ea e7 0d 4a e8 e7 0d 4a e6 e7 93 c0 1f 41 91 c0 0f 41 9a c0 2f 41 04 22 00 4a 2f 50 97 0b 00 01 60 44 00 01 30 44 2f c0 95 3b 00 02 30 44 10 02 30 44 20 02 30 44 30 02 30 44 00 01 70 44 10 01 60 44 10 4b 1a 68 12 68 d2 f8 30 21 12 68 bf f3 5f 8f 22 f0 88 62 bf f3 5f 8f 19 68 09 68 d1 f8 30 11 0a 60 1a 68 12 68 d2 f8 30 21 12 68 bf f3 5f 8f 42 f0 8c 62 bf f3 5f 8f 1b 68 1b 68 d3 f8 30 31 1a 60 70 47 90 92 30 40 00 b5 4f 4a 9d b0 13 68 19 68 d1 f8 1c 13 01 91 19 68 d1 f8 dc 12 02 91 19 68 d1 f8 38 12 03 91 19 68 d1 f8 74 12 04 91 00 21 05 91 18 68 d0 f8 10 02 06 90 18 68 d0 f8 44 02 07 90 18 68 d0 f8 48 02 08 90 18 68 d0 f8 7c 02 09 90 18 68 d0 f8 14 04 0a 90 18 68 d0 f8 44 03 0b 90 18 68 d0 f8 48 03 0c 90 18 68 d0 f8 4c 03 0d 90 18 68 d0 f8 50 03 0e 90 18 68 10 91 d0 f8 54 03 0f 90 18 68 d0 f8 18 04 11 90 18 68 d0 f8 e0 02 12 90 18 68 d0 f8 e4 02 13 90 18 68 d0 f8 30 03 14 90 18 68 d0 f8 10 04 15 90 18 68 d0 f8 b8 03 16 90 18 68 d0 f8 64 03 17 90 18 68 d0 f8 68 03 18 90 18 68 d0 f8 6c 03 19 90 18 68 1b 91 d0 f8 70 03 1a 90 1b 68 01 a8 d3 f8 4c 13 0b 68 43 f4 80 73 0b 60 13 68 1b 68 d3 f8 e0 12 0b 68 43 f0 80 73 0b 60 13 68 1b 68 d3 f8 e4 12 0b 68 43 f0 80 73 0b 60 13 68 1b 68 d3 f8 18 14 0b 68 43 f0 80 73 0b 60 13 68 1b 68 d3 f8 bc 14 0b 68 43 f4 80 73 0b 60 13 68 06 a9 1b 68 d3 f8 e0 21 13 68 43 f4 80 73 13 60 01 23 11 aa 00 f0 1f fd 1d b0 5d f8 04 fb bc 97 30 40 08 b5 27 4a 27 4b 12 68 1b 68 27 49 1b 68 11 60 26 4a 93 42 40 d0 0d d8 20 3a 93 42 34 d0 10 32 93 42 39 d0 a2 f5 88 72 93 42 20 d0 20 48 02 f0 09 fb 24 e0 1f 4a 93 42 06 d0 0d d8 1e 4a 93 42 2a d0 1e 4a 93 42 f1 d1 1d 4b 1e 4a 1b 68 1a 60 1d 4b 1e 4a 1b 68 11 e0 1d 4a 93 42 e6 d1 18 4b 1c 4a 1b 68 1a 60 18 4b 1b 4a 1b 68 06 e0 14 4b 1a 4a 1b 68 1a 60 14 4b 19 4a 1b 68 1a 60 19 4b 19 4a 1b 68 1a 60 08 bd 0d 4b 18 4a 1b 68 1a 60 0d 4b 17 4a 1b 68 f1 e7 09 4b 16 4a 1b 68 f6 e7 bc 97 30 40 bc 70 30 40 88 72 30 40 20 02 30 44 2d 86 30 40 10 01 60 44 30 02 30 44 00 01 60 44 94 92 30 40 38 95 30 40 b8 97 30 40 58 95 30 40 00 01 70 44 78 96 30 40 98 96 30 40 b8 92 30 40 18 94 30 40 90 92 30 40 c0 70 30 40 d8 92 30 40 f8 92 30 40 98 92 30 40 04 4b 18 68 bf f3 5f 8f 20 f0 15 00 40 05 40 0d 70 47 00 bf 04 7b 30 4a 70 47 00 00 10 b5 0f 4b 98 6a bf f3 5f 8f 0e 4b d9 f8 c4 20 a0 fb 03 01 b2 eb 51 2f 4f ea 51 24 d9 f8 c4 10 d9 f8 c0 20 22 44 84 bf 02 f5 5a 22 02 f5 e8 62 52 1a c9 f8 c0 20 c9 f8 c4 40 d9 f8 c0 00 10 bd 00 20 03 48 b5 81 4e 1b bf f3 5f 8f 00 20 03 4b d8 62 bf f3 5f 8f 2b 22 5a 62 70 47 00 20 03 48 10 b5 04 46 ff f7 cc ff 00 1b 10 bd 4f f4 96 53 58 43 09 4b 09 4a a0 fb 03 01 8b 09 OOB: ff ff c8 b0 e8 12 b2 4a 63 70 83 0f c6 76 57 00 0d 20 e0 06 66 b6 1a b4 03 f7 8e d4 44 00 8d 04 79 b3 3c e6 30 0f bf da d5 af 87 00 ef a4 e7 b4 07 db 1e b0 1c 2d bc 31 3b 00 ff ff ff ff ff ff
mmc dev 0
#replace 0 with whatever points to SD-card
=> mmc dev 0 switch to partitions #0, OK mmc0 is current device
nand read $loadaddr 0 800
#loadaddr is any address in RAM which is free for use.
=> nand read $loadaddr 0 800
NAND read: device 0 offset 0x0, size 0x800 Scanning device for bad blocks ecc: 0 ecc: 0 ecc: 0 ecc: 0 2048 bytes read: OK
fatwrite mmc 0:1 $loadaddr nand.org 800
=> fatwrite mmc 0:1 $loadaddr nand.org 800 2048 bytes written in 3 ms (666 KiB/s)
fatload mmc 0:1 $loadaddr nand.org
=> fatload mmc 0:1 $loadaddr nand.org 2048 bytes read in 10 ms (199.2 KiB/s)
nand write $loadaddr 0 800
=> nand write $loadaddr 0 800
NAND write: device 0 offset 0x0, size 0x800 ecc: fc67657 ecc: f78ed444 ecc: dad5af87 ecc: 2dbc313b ecc: 0 ecc: 0 ecc: 0 ecc: 0 2048 bytes written: OK
Now please run the below test on the offending commit 04fcd25873 after applying the patch (at end).
nand dump 0
=> nand dump 0 Page 00000000 dump: 40 00 00 00 0c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 43 48 53 45 54 54 49 4e 47 53 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff c1 c0 c0 c0 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 dc 99 00 00 00 00 30 40 ff ff ff ea 1a 06 00 ea 00 00 0f e1 1f 10 00 e2 1a 00 31 e3 1f 00 c0 13 13 00 80 13 c0 00 80 e3 00 f0 29 e1 06 00 00 eb 1d 00 00 eb 8a 06 00 eb 15 0f 07 ee 9a 0f 07 ee 95 0f 07 ee 1e ff 2f e1 f0 ff ff ea 00 00 a0 e3 17 0f 08 ee 15 0f 07 ee d5 0f 07 ee 9a 0f 07 ee 95 0f 07 ee 10 0f 11 ee 02 0a c0 e3 07 00 c0 e3 02 00 80 e3 02 0b 80 e3 01 0a 80 e3 10 0f 01 ee 0e 50 a0 e1 10 1f 10 ee 21 3a a0 e1 0f 30 03 e2 0f 40 01 e2 03 22 a0 e1 02 20 84 e1 0c 00 9f e5 07 00 c0 e3 00 d0 a0 e1 05 f0 a0 e1 64 06 00 ea 00 df 30 40 06 4b 1b 68 1b 68 1b 68 1b 68 bf f3 5f 8f 04 4a 03 f0 1f 03 52 f8 23 00 70 47 00 bf 90 92 30 40 68 6f 30 40 01 4b 03 60 70 47 00 bf 28 86 30 40 00 20 70 47 30 b5 47 4b 19 68 03 f1 80 63 a3 f5 3b 43 99 42 79 d0 44 4a 91 42 0c bf 4f f0 9e 32 4f f0 7c 32 bf f3 5f 8f 40 4b 18 68 00 68 d0 f8 e4 00 02 60 bf f3 5f 8f 18 68 22 f4 c0 24 00 68 d0 f8 e8 00 02 60 bf f3 5f 8f 18 68 00 68 d0 f8 ec 00 04 60 bf f3 5f 8f 18 68 00 68 d0 f8 f0 50 33 48 28 60 bf f3 5f 8f 1d 68 2d 68 d5 f8 f4 50 2a 60 bf f3 5f 8f 1d 68 2d 68 d5 f8 f8 50 2a 60 bf f3 5f 8f 1a 68 12 68 d2 f8 fc 20 14 60 bf f3 5f 8f 1a 68 12 68 d2 f8 00 21 10 60 1a 68 12 68 92 6c 12 68 bf f3 5f 8f 92 b2 92 b9 bf f3 5f 8f 1a 68 12 68 d0 6c 1f 4a 02 60 bf f3 5f 8f 18 68 00 68 00 6d 02 60 bf f3 5f 8f 18 68 00 68 40 6d 02 60 1a 68 12 68 d2 f8 84 21 12 68 bf f3 5f 8f 3a b9 bf f3 5f 8f 1a 68 13 48 12 68 d2 f8 84 21 10 60 12 4a 91 42 0b d8 bf f3 5f 8f 1b 68 10 4a 1b 68 d3 f8 88 31 1a 60 30 bd 4f f0 1c 32 89 e7 1a 68 12 68 d2 f8 88 21 12 68 bf f3 5f 8f 00 2a ea d0 f1 e7 00 bc 30 40 00 02 30 44 90 92 30 40 0f 8c 88 a0 0f 04 01 04 10 01 4d 1c ff 00 60 44 00 40 08 99 08 b5 00 f0 50 fa 1f 4b 98 42 a3 f5 6f 03 a3 f2 93 43 31 d0 0a d8 1c 4a 90 42 19 d0 02 f5 80 12 01 32 90 42 17 d0 4f f0 ff 32 12 e0 17 4a 90 42 f9 d1 17 4a 12 68 bf f3 5f 8f 16 49 8a 42 1d d0 01 f1 00 51 a1 f5 1c 31 8a 42 19 d0 12 4a 00 e0 12 4a 1a 60 08 bd 0e 4a 12 68 bf f3 5f 8f 10 49 8a 42 05 d0 01 f1 80 51 8a 42 03 d0 0d 4a f0 e7 0d 4a ee e7 0d 4a ec e7 0d 4a ea e7 0d 4a e8 e7 0d 4a e6 e7 93 c0 1f 41 91 c0 0f 41 9a c0 2f 41 04 22 00 4a 2f 50 97 0b 00 01 60 44 00 01 30 44 2f c0 95 3b 00 02 30 44 10 02 30 44 20 02 30 44 30 02 30 44 00 01 70 44 10 01 60 44 10 4b 1a 68 12 68 d2 f8 30 21 12 68 bf f3 5f 8f 22 f0 88 62 bf f3 5f 8f 19 68 09 68 d1 f8 30 11 0a 60 1a 68 12 68 d2 f8 30 21 12 68 bf f3 5f 8f 42 f0 8c 62 bf f3 5f 8f 1b 68 1b 68 d3 f8 30 31 1a 60 70 47 90 92 30 40 00 b5 4f 4a 9d b0 13 68 19 68 d1 f8 1c 13 01 91 19 68 d1 f8 dc 12 02 91 19 68 d1 f8 38 12 03 91 19 68 d1 f8 74 12 04 91 00 21 05 91 18 68 d0 f8 10 02 06 90 18 68 d0 f8 44 02 07 90 18 68 d0 f8 48 02 08 90 18 68 d0 f8 7c 02 09 90 18 68 d0 f8 14 04 0a 90 18 68 d0 f8 44 03 0b 90 18 68 d0 f8 48 03 0c 90 18 68 d0 f8 4c 03 0d 90 18 68 d0 f8 50 03 0e 90 18 68 10 91 d0 f8 54 03 0f 90 18 68 d0 f8 18 04 11 90 18 68 d0 f8 e0 02 12 90 18 68 d0 f8 e4 02 13 90 18 68 d0 f8 30 03 14 90 18 68 d0 f8 10 04 15 90 18 68 d0 f8 b8 03 16 90 18 68 d0 f8 64 03 17 90 18 68 d0 f8 68 03 18 90 18 68 d0 f8 6c 03 19 90 18 68 1b 91 d0 f8 70 03 1a 90 1b 68 01 a8 d3 f8 4c 13 0b 68 43 f4 80 73 0b 60 13 68 1b 68 d3 f8 e0 12 0b 68 43 f0 80 73 0b 60 13 68 1b 68 d3 f8 e4 12 0b 68 43 f0 80 73 0b 60 13 68 1b 68 d3 f8 18 14 0b 68 43 f0 80 73 0b 60 13 68 1b 68 d3 f8 bc 14 0b 68 43 f4 80 73 0b 60 13 68 06 a9 1b 68 d3 f8 e0 21 13 68 43 f4 80 73 13 60 01 23 11 aa 00 f0 1f fd 1d b0 5d f8 04 fb bc 97 30 40 08 b5 27 4a 27 4b 12 68 1b 68 27 49 1b 68 11 60 26 4a 93 42 40 d0 0d d8 20 3a 93 42 34 d0 10 32 93 42 39 d0 a2 f5 88 72 93 42 20 d0 20 48 02 f0 09 fb 24 e0 1f 4a 93 42 06 d0 0d d8 1e 4a 93 42 2a d0 1e 4a 93 42 f1 d1 1d 4b 1e 4a 1b 68 1a 60 1d 4b 1e 4a 1b 68 11 e0 1d 4a 93 42 e6 d1 18 4b 1c 4a 1b 68 1a 60 18 4b 1b 4a 1b 68 06 e0 14 4b 1a 4a 1b 68 1a 60 14 4b 19 4a 1b 68 1a 60 19 4b 19 4a 1b 68 1a 60 08 bd 0d 4b 18 4a 1b 68 1a 60 0d 4b 17 4a 1b 68 f1 e7 09 4b 16 4a 1b 68 f6 e7 bc 97 30 40 bc 70 30 40 88 72 30 40 20 02 30 44 2d 86 30 40 10 01 60 44 30 02 30 44 00 01 60 44 94 92 30 40 38 95 30 40 b8 97 30 40 58 95 30 40 00 01 70 44 78 96 30 40 98 96 30 40 b8 92 30 40 18 94 30 40 90 92 30 40 c0 70 30 40 d8 92 30 40 f8 92 30 40 98 92 30 40 04 4b 18 68 bf f3 5f 8f 20 f0 15 00 40 05 40 0d 70 47 00 bf 04 7b 30 4a 70 47 00 00 10 b5 0f 4b 98 6a bf f3 5f 8f 0e 4b d9 f8 c4 20 a0 fb 03 01 b2 eb 51 2f 4f ea 51 24 d9 f8 c4 10 d9 f8 c0 20 22 44 84 bf 02 f5 5a 22 02 f5 e8 62 52 1a c9 f8 c0 20 c9 f8 c4 40 d9 f8 c0 00 10 bd 00 20 03 48 b5 81 4e 1b bf f3 5f 8f 00 20 03 4b d8 62 bf f3 5f 8f 2b 22 5a 62 70 47 00 20 03 48 10 b5 04 46 ff f7 cc ff 00 1b 10 bd 4f f4 96 53 58 43 09 4b 09 4a a0 fb 03 01 8b 09 OOB: ff ff c8 b0 e8 12 b2 4a 63 70 83 0f c6 76 57 00 0d 20 e0 06 66 b6 1a b4 03 f7 8e d4 44 00 8d 04 79 b3 3c e6 30 0f bf da d5 af 87 00 ef a4 e7 b4 07 db 1e b0 1c 2d bc 31 3b 00 ff ff ff ff ff ff
mmc dev 0
#replace 0 with whatever points to SD-card
=> mmc dev 0 switch to partitions #0, OK mmc0 is current device
""" NOTE """ # Here I did a nand read, and re-write to the "nand.post" file. It # shouldn't affect the results, but I kept the commands and output for # transparency.
=> nand read $loadaddr 0 800
NAND read: device 0 offset 0x0, size 0x800 Scanning device for bad blocks ecc: 0 ecc: 0 ecc: 0 ecc: 0 2048 bytes read: OK => fatwrite mmc 0:1 $loadaddr nand.post 800 2048 bytes written in 3 ms (666 KiB/s)
fatload mmc 0:1 $loadaddr nand.org
=> fatload mmc 0:1 $loadaddr nand.org 2048 bytes read in 10 ms (199.2 KiB/s)
nand write $loadaddr 0 800
=> nand write $loadaddr 0 800
NAND write: device 0 offset 0x0, size 0x800 ecc: fc67657 ecc: f78ed444 ecc: dad5af87 ecc: 2dbc313b ecc: 0 ecc: 0 ecc: 0 ecc: 0 2048 bytes written: OK
Please send me the logs of both tests and the nand.org file so I can try it out here. Thanks!
All are attached.
However I have some other initial findings:
I swapped in just U-Boot (not the SPL) with your patch, and everything seems to work!
The issue of Uncorrectable ECC errors spam came from the SPL. Here's a snippet of the boot log with the "ecc" print as well as your patch:
U-Boot SPL 2023.04-00029-g26a9ce5314-dirty (May 17 2023 - 12:06:49 -0700) OMAP4460-GP ES1.1 Trying to boot from NAND ecc: 2420106 ecc: ebd922f6 ecc: 333f844f ecc: ab812f72 omap-elm: uncorrectable ECC errors omap-elm: uncorrectable ECC errors omap-elm: uncorrectable ECC errors omap-elm: uncorrectable ECC errors ecc: 2420106 ecc: ebd922f6 ecc: 333f844f ecc: ab812f72 omap-elm: uncorrectable ECC errors omap-elm: uncorrectable ECC errors omap-elm: uncorrectable ECC errors omap-elm: uncorrectable ECC errors
Historically when I saw "uncorrectable ECC errors" that meant I should grab a cup of coffee, problems were going to happen. However, in this scenario, if I let the SPL spew the ECC error prints, it eventually loads U-Boot from NAND. And U-Boot successfully loads the kernel, DTB, and boots the filesystem (with the "ecc: %x" prints slowing things down right now)
Here's where U-Boot loads the DTB:
Loading file 'boot/omap4-ia-decoder-card.dtb' to addr 0x88000000... ecc: 0 ... Repeated over and over ... ecc: 0 Done Unmounting UBIFS volume rootfs-a!
So I'm thinking either:
1. I'm doing something horribly wrong and have been getting away with it. The patch simply highlights this. Or...
2. There's an issue with how the SPL is determining ECC errors, and it is incorrectly reporting errors.
I hope this information is useful, and let me know if there are any other tests I can run.
Many thanks,
Colin Foster