Re: [PATCH 1/1] mmc: Set optimal I/O size when mmc_setip_queue

Shawn Lin
2023-08-25T09:17:57Z

On 2023/8/25 16:39, Sharp.Xia@mediatek.com wrote:
> On Fri, 2023-08-25 at 16:11 +0800, Shawn Lin wrote:
>>
>> Hi Sharp,

...

>>> 1024
>>>
> Hi Shawn,
>
> What is your readahead value before and after applying this patch?
>

The original readahead is 128, and after applying the patch is 1024

cat /d/mmc0/ios
clock: 200000000 Hz
actual clock: 200000000 Hz
vdd: 18 (3.0 ~ 3.1 V)
bus mode: 2 (push-pull)
chip select: 0 (don't care)
power mode: 2 (on)
bus width: 3 (8 bits)
timing spec: 10 (mmc HS400 enhanced strobe)
signal voltage: 1 (1.80 V)
driver type: 0 (driver type B)

The driver I used is sdhci-of-dwcmshc.c with a KLMBG2JETDB041 eMMC chip.