* [PATCH] arm64: dts: rockchip: slow down emmc freq for rock 5 itx
@ 2025-02-28 14:33 Jianfeng Liu
2025-03-08 17:32 ` Heiko Stuebner
0 siblings, 1 reply; 2+ messages in thread
From: Jianfeng Liu @ 2025-02-28 14:33 UTC (permalink / raw)
To: linux-rockchip
Cc: Jianfeng Liu, Conor Dooley, Heiko Stuebner, Krzysztof Kozlowski,
Rob Herring, Stephen Rothwell, devicetree, linux-arm-kernel,
linux-kernel
The current max-frequency 200000000 of emmc is not stable. When doing
heavy write there will be I/O Error. After setting max-frequency to
150000000 the emmc is stable under write.
Also remove property mmc-hs200-1_8v because we are already running at
HS400 mode.
Tested with fio command:
fio -filename=./test_randread -direct=1 -iodepth 1 -thread \
-rw=randwrite -ioengine=psync -bs=16k -size=1G -numjobs=10 \
-runtime=600 -group_reporting -name=mytest
Signed-off-by: Jianfeng Liu <liujianfeng1994@gmail.com>
---
arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
index 253b23ea9fba..bcefe5356936 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
@@ -724,10 +724,9 @@ &saradc {
&sdhci {
bus-width = <8>;
- max-frequency = <200000000>;
+ max-frequency = <150000000>;
mmc-hs400-1_8v;
mmc-hs400-enhanced-strobe;
- mmc-hs200-1_8v;
no-sdio;
no-sd;
non-removable;
--
2.43.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64: dts: rockchip: slow down emmc freq for rock 5 itx
2025-02-28 14:33 [PATCH] arm64: dts: rockchip: slow down emmc freq for rock 5 itx Jianfeng Liu
@ 2025-03-08 17:32 ` Heiko Stuebner
0 siblings, 0 replies; 2+ messages in thread
From: Heiko Stuebner @ 2025-03-08 17:32 UTC (permalink / raw)
To: linux-rockchip, Jianfeng Liu
Cc: Heiko Stuebner, Conor Dooley, Krzysztof Kozlowski, Rob Herring,
Stephen Rothwell, devicetree, linux-arm-kernel, linux-kernel
On Fri, 28 Feb 2025 22:33:08 +0800, Jianfeng Liu wrote:
> The current max-frequency 200000000 of emmc is not stable. When doing
> heavy write there will be I/O Error. After setting max-frequency to
> 150000000 the emmc is stable under write.
>
> Also remove property mmc-hs200-1_8v because we are already running at
> HS400 mode.
>
> [...]
Applied, thanks!
[1/1] arm64: dts: rockchip: slow down emmc freq for rock 5 itx
commit: b36402e4a0772d1b3da06a4f5fbd1cfe4d6f1cc0
Best regards,
--
Heiko Stuebner <heiko@sntech.de>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2025-03-08 17:32 ` Heiko Stuebner
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