From: Chris Morgan <macromorgan@hotmail.com>
Date: Wed, 5 Nov 2025 20:57:07 +0000 (-0600)
Subject: arm64: dts: rockchip: Enable HS400 for Indiedroid Nova
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cce837b7a3599dc83cd9c08afc07b076f127354b;p=thirdparty%2Fkernel%2Fstable.git

arm64: dts: rockchip: Enable HS400 for Indiedroid Nova

Once the DLL_STRBIN_TAPNUM_DEFAULT is set to the correct value [1], the
workaround to ensure stable eMMC operation is no longer needed. I
have observed testing this that hdparm went from:
"Timing buffered disk reads: 502 MB in  3.00 seconds = 167.14 MB/sec"
to the following:
"Timing buffered disk reads: 832 MB in  3.00 seconds = 277.32 MB/sec"

[1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/mmc/host/sdhci-of-dwcmshc.c?id=a28352cf2d2f8380e7aca8cb61682396dca7a991

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://patch.msgid.link/20251105205708.732125-5-macroalpha82@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts b/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts
index 0fb58ff895a5..02e95fca2d5e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts
@@ -559,10 +559,10 @@
 	status = "okay";
 };
 
-/* HS400 modes seemed to cause io errors. */
 &sdhci {
 	bus-width = <8>;
-	no-mmc-hs400;
+	mmc-hs400-1_8v;
+	mmc-hs400-enhanced-strobe;
 	no-sd;
 	no-sdio;
 	non-removable;