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

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Date:   Mon, 11 Nov 2019 10:51:04 +0100
From:   Markus Reichl <m.reichl@...etechno.de>
To:     Christoph Muellner <christoph.muellner@...obroma-systems.com>,
        robh+dt@...nel.org, mark.rutland@....com, heiko@...ech.de,
        shawn.lin@...k-chips.com
Cc:     devicetree@...r.kernel.org, Jeffy Chen <jeffy.chen@...k-chips.com>,
        linux-kernel@...r.kernel.org,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Vicente Bergas <vicencb@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-rockchip@...ts.infradead.org,
        Tony Xie <tony.xie@...k-chips.com>,
        Klaus Goger <klaus.goger@...obroma-systems.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Randy Li <ayaka@...lik.info>,
        Philipp Tomsich <philipp.tomsich@...obroma-systems.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        linux-arm-kernel@...ts.infradead.org,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>
Subject: arm64: dts: rockchip: Disable HS400 for mmc on rk3399-roc-pc

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 <m.reichl@...etechno.de>
---
 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