This is a note to let you know that I've just added the patch titled
arm64: dts: rockchip: Disable HS400 for eMMC on ROCK Pi 4
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-rockchip-disable-hs400-for-emmc-on-rock-pi-4.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cee572756aa2cb46e959e9797ad4b730b78a050b Mon Sep 17 00:00:00 2001
From: Christopher Obbard <chris.obbard@xxxxxxxxxxxxx>
Date: Wed, 5 Jul 2023 15:42:54 +0100
Subject: arm64: dts: rockchip: Disable HS400 for eMMC on ROCK Pi 4
From: Christopher Obbard <chris.obbard@xxxxxxxxxxxxx>
commit cee572756aa2cb46e959e9797ad4b730b78a050b upstream.
There is some instablity with some eMMC modules on ROCK Pi 4 SBCs running
in HS400 mode. This ends up resulting in some block errors after a while
or after a "heavy" operation utilising the eMMC (e.g. resizing a
filesystem). An example of these errors is as follows:
[ 289.171014] mmc1: running CQE recovery
[ 290.048972] mmc1: running CQE recovery
[ 290.054834] mmc1: running CQE recovery
[ 290.060817] mmc1: running CQE recovery
[ 290.061337] blk_update_request: I/O error, dev mmcblk1, sector 1411072 op 0x1:(WRITE) flags 0x800 phys_seg 36 prio class 0
[ 290.061370] EXT4-fs warning (device mmcblk1p1): ext4_end_bio:348: I/O error 10 writing to inode 29547 starting block 176466)
[ 290.061484] Buffer I/O error on device mmcblk1p1, logical block 172288
[ 290.061531] Buffer I/O error on device mmcblk1p1, logical block 172289
[ 290.061551] Buffer I/O error on device mmcblk1p1, logical block 172290
[ 290.061574] Buffer I/O error on device mmcblk1p1, logical block 172291
[ 290.061592] Buffer I/O error on device mmcblk1p1, logical block 172292
[ 290.061615] Buffer I/O error on device mmcblk1p1, logical block 172293
[ 290.061632] Buffer I/O error on device mmcblk1p1, logical block 172294
[ 290.061654] Buffer I/O error on device mmcblk1p1, logical block 172295
[ 290.061673] Buffer I/O error on device mmcblk1p1, logical block 172296
[ 290.061695] Buffer I/O error on device mmcblk1p1, logical block 172297
Disabling the Command Queue seems to stop the CQE recovery from running,
but doesn't seem to improve the I/O errors. Until this can be investigated
further, disable HS400 mode on the ROCK Pi 4 SBCs to at least stop I/O
errors from occurring.
While we are here, set the eMMC maximum clock frequency to 1.5MHz to
follow the ROCK 4C+.
Fixes: 1b5715c602fd ("arm64: dts: rockchip: add ROCK Pi 4 DTS support")
Signed-off-by: Christopher Obbard <chris.obbard@xxxxxxxxxxxxx>
Tested-By: Folker Schwesinger <dev@xxxxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230705144255.115299-2-chris.obbard@xxxxxxxxxxxxx
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
@@ -595,9 +595,9 @@
};
&sdhci {
+ max-frequency = <150000000>;
bus-width = <8>;
- mmc-hs400-1_8v;
- mmc-hs400-enhanced-strobe;
+ mmc-hs200-1_8v;
non-removable;
status = "okay";
};
Patches currently in stable-queue which might be from chris.obbard@xxxxxxxxxxxxx are
queue-5.15/arm64-dts-rockchip-disable-hs400-for-emmc-on-rock-pi-4.patch
