Thread (18 messages) flat view 18 messages, 6 authors, 2019-11-18

arm64: dts: rockchip: Disable HS400 for mmc on rk3399-roc-pc

From: Markus Reichl <hidden>
Date: 2019-11-11 09:51:18
Also in: linux-mmc, linux-rockchip, lkml
Subsystem: the rest · Maintainer: Linus Torvalds

Working with rootfs on two 128GB mmcs on rk3399-roc-pc.

One (mmc name 128G72, one screw hole) works fine in HS400 mode.
Other (mmc name DJNB4R, firefly on pcb, two screw holes) gets lots of
mmc1: "running CQE recovery", even hangs with damaged fs,
when running under heavy load, e.g. compiling kernel.
Both run fine with HS200.

Disabling CQ with patch mmc: core: Add MMC Command Queue Support kernel parameter [0] did not help.
[0] https://gitlab.com/ayufan-repos/rock64/linux-mainline-kernel/commit/54e264154b87dfe32a8359b2726e2d5611adbaf3

Therefore I propose to disable HS400 mode on roc-pc for now.

Signed-off-by: Markus Reichl <redacted>
---
 arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi | 2 --
 1 file changed, 2 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
index 29a50a083c42..33df95e384b4 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
@@ -660,8 +660,6 @@
 
 &sdhci {
 	bus-width = <8>;
-	mmc-hs400-1_8v;
-	mmc-hs400-enhanced-strobe;
 	non-removable;
 	status = "okay";
 };
-- 
2.20.1
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