SD Card Detection

[jayasankar rv]

Dear Team,

We're facing an intermittent issue with SD Card detection. The card will not get detected intermittently while power cycling. It will get detected if we re-insert the card or with hot swap

Is that due to the init / probe happening before the card (card detect or SD Voltages) is ready ? It would be great to have any insights on this. Below attaching the related log.

[    9.380770] Bluetooth: BNEP socket layer initialized
[   20.952161] mmc1: Data timeout error
[   20.955758] sdhci: =========== REGISTER DUMP (mmc1)===========
[   20.961602] sdhci: Sys addr: 0x00000000 | Version:  0x00000303
[   20.967443] sdhci: Blk size: 0x00007008 | Blk cnt:  0x00000001
[   20.973283] sdhci: Argument: 0x00000000 | Trn mode: 0x00000013
[   20.979123] sdhci: Present:  0x01fb0000 | Host ctl: 0x00000011
[   20.984962] sdhci: Power:    0x00000001 | Blk gap:  0x00000000
[   20.990800] sdhci: Wake-up:  0x00000000 | Clock:    0x00000407
[   20.996637] sdhci: Timeout:  0x0000000e | Int stat: 0x00000000
[   21.002477] sdhci: Int enab: 0x02ff100b | Sig enab: 0x02fc100b
[   21.008314] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
[   21.014153] sdhci: Caps:     0x376cd08c | Caps_1:   0x10006f77
[   21.019991] sdhci: Cmd:      0x0000333a | Max curr: 0x00000000
[   21.025826] sdhci: Host ctl2: 0x00003008
[   21.029761] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000ffefe410
[   21.036351] sdhci: ===========================================
[   21.042940] mmc1: error -110 whilst initialising SD card
<<REMOVED>>
[   33.303382] mmc1: card never left busy state
[   33.307692] mmc1: error -110 whilst initialising SD card
[   33.313419] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   39.935716] mmc1: card never left busy state
[   39.940056] mmc1: error -110 whilst initialising SD card
[   39.945880] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   47.067434] mmc1: card never left busy state
[   47.071737] mmc1: error -110 whilst initialising SD card
[   47.077147] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   53.175885] mmc1: card never left busy state
[   53.180900] mmc1: error -110 whilst initialising SD card
[   53.186547] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   59.283493] mmc1: card never left busy state
[   59.287820] mmc1: error -110 whilst initialising SD card
[   59.293249] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   66.131869] mmc1: card never left busy state
[   66.136445] mmc1: error -110 whilst initialising SD card
[   66.142080] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   73.228583] mmc1: card never left busy state
[   73.233200] mmc1: error -110 whilst initialising SD card
[   73.238801] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   79.331610] mmc1: card never left busy state
[   79.336401] mmc1: error -110 whilst initialising SD card
[   79.342288] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   85.452010] mmc1: card never left busy state
[   85.456833] mmc1: error -110 whilst initialising SD card
[   85.462950] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   91.791408] mmc1: card never left busy state
[   91.795694] mmc1: error -110 whilst initialising SD card
[   91.801269] sdhci-tegra sdhci-tegra.2: Tuning done, restoring the best tap value : 21
[   98.924039] mmc1: card never left busy state
[   98.928837] mmc1: error -110 whilst initialising SD card

Thanks

Regards,

Jayasankar

[Anil Kumar Pugalia]

Is this w/ this card only? Or, w/ any card?

Regards
Anil

Passion: https://sysplay.in (Playing with Systems)

jayasankar rv wrote on 16/04/24 17:46:

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[jayasankar rv]

Dear Sir,

The behaviour is same with any card

We've tried with a bootdealy to isolate any hardware - driver race conditions but no luck

We got a response from Nvidia to update the DT with 'card detection' & 'power supply' entries. We are working on it and will update you with the results

sdhci@700b0400 {
status = “okay”;
/delete-property/ keep-power-in-suspend;
/delete-property/ non-removable;
mmc-ddr-1_8v;
mmc-ocr-mask = <3>;
uhs-mask = <0x0>;
tap-delay = <3>;
};

Regards,

Jayasankar

To view this discussion on the web visit https://groups.google.com/d/msgid/inside_linux/af333da8-447f-414d-b2dd-425a7676bd1d%40sarika-pugs.com.

[jayasankar rv]

Dear Sir,

We've probed the GPIO for load switch enable and identified some glitches

Made DT configurations proper (earlier the load switch enable was from start-up script). Post this change the issue seems fixed

Regards,

Jayasankar