Re: [PATCH 0/6] RISC-V: Add eMMC support for TH1520 boards

[Xi Ruoyao <xry111@xry111.site>]

On Thu, 2023-09-21 at 18:49 -0700, Drew Fustini wrote:
> This series adds support for the eMMC on the BeagleV Ahead and the
> Sipeed LicheePi 4A. This allows the kernel to boot with the rootfs on
> eMMC.
> 
> I tested on top of v6.6-rc2 with this config [1]. I was able to boot
> both the Ahead [2] and LPi4a [3] from eMMC. The following prerequisites
> are required:
> 
>   [PATCH v2] riscv: dts: thead: set dma-noncoherent to soc bus [4]
> 
> I pushed a branch [5] with this patch series and the above patch for
> those that find a git branch easier to test.
> 
> Please note that only the MMC controller connected to the eMMC device
> is enabled in the device trees for these two boards. I did not yet
> attempt to configure and use the microSD card slot. My preference is to
> address that in a future patch series.
> 
> References:
> [1] https://gist.github.com/pdp7/5fbdcf2a65eb1abdd3a29d519c19cdd2
> [2] https://gist.github.com/pdp7/91a801a5f8d1070c53509eda9800ad78
> [3] https://gist.github.com/pdp7/1445c3c991e88fd69c60165cef65726a
> [4] https://lore.kernel.org/linux-riscv/20230912072232.2455-1-jszhang@kernel.org/
> [5] https://github.com/pdp7/linux/tree/b4/th1520-mmc

I've tested this branch and successfully booted a rootfs on Lichee Pi 4A
eMMC with rootdelay=10.

Curiously is there some way to make it work without rootdelay?

For everything except "Enable BeagleV Ahead eMMC controller":

Tested-by: Xi Ruoyao <xry111@xry111.site>

-- 
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University