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From: Brian Sune <briansune@gmail.com>
To: Jonas Karlman <jonas@kwiboo.se>
Cc: u-boot@lists.denx.de, Dragan Simic <dsimic@manjaro.org>,
	Dang Huynh <danct12@riseup.net>, Brian Sune <briansune@gmail.com>
Subject: Re: [PATCH] rockchip: remove regulator enable from device probe
Date: Sun,  2 Nov 2025 19:31:22 +0800	[thread overview]
Message-ID: <20251102113122.1038-1-briansune@gmail.com> (raw)
In-Reply-To: <20251101203429.1603832-1-jonas@kwiboo.se>

Hi Jonas,

This patch resolves the previous boot issue mentioned earlier on the mailing list:

[DEBUG] rk3399-nanopi-neo4: SPL SD init may report -5 due to SD power-on timing

Quoting the earlier observation:
"
While testing mainline U-Boot (v2026.01-rc1-00070-ge34d01d23e45) on the
FriendlyARM NanoPi NEO4 (RK3399), I observed that SPL sometimes fails to
initialize the SD card with the following message:

    spl: mmc init failed with error: -5
    SPL: failed to boot from all boot devices
"

So the NanoPi NEO4 boot stall appears to have been caused by the previous regulator patch.
However, it is puzzling why the issue only affected SD boot and not MMC.

This suggests that the delay method proposed earlier regarding power-on timing
is not the actual root cause of the RK3399 NanoPi NEO4 SD boot stall.

Tested with this patch applied, and SD boot now works normally.

Regards,  
Brian

  parent reply	other threads:[~2025-11-02 11:31 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-01 20:34 [PATCH] Revert "power: regulator: Add vin-supply for GPIO and Fixed regulators" Jonas Karlman
2025-11-01 21:15 ` Dragan Simic
2025-11-01 21:17 ` Mark Kettenis
2025-11-01 21:23   ` Dragan Simic
2025-11-02  2:00     ` Jonas Karlman
2025-11-02  7:54       ` Dragan Simic
2025-11-02 11:31 ` Brian Sune [this message]
2025-11-03 11:42   ` [PATCH] rockchip: remove regulator enable from device probe Sune Brian
2025-11-03  8:51 ` [PATCH] Revert "power: regulator: Add vin-supply for GPIO and Fixed regulators" Peng Fan
2025-11-03 10:36   ` Jonas Karlman
2025-11-03 11:03     ` Quentin Schulz
2025-11-07  7:31     ` Ye Li
2025-11-07 14:25       ` Jonas Karlman
2025-11-06 16:59 ` Tom Rini

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