From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick Wildt <patrick@blueri.se>
Date: Thu, 28 Nov 2019 00:38:45 +0100
Subject: [U-Boot] [PATCH v2 2/2] rockchip: px30: enable spl-fifo-mode
 for both emmc and sdmmc on evb
In-Reply-To: <20191119110402.17876-2-heiko@sntech.de>
References: <20191119110402.17876-1-heiko@sntech.de>
 <20191119110402.17876-2-heiko@sntech.de>
Message-ID: <20191127233845.GA19402@nox.fritz.box>
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On Tue, Nov 19, 2019 at 12:04:02PM +0100, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> As part of loading trustedfirmware, the SPL is required to place portions
> of code into the socs sram but the mmc controllers can only do dma
> transfers into the regular memory, not sram.
> 
> The results of this are not directly visible in u-boot itself, but
> manifest as security-relate cpu aborts during boot of for example Linux.
> 
> There were a number of attempts to solve this elegantly but so far
> discussion is still ongoing, so to make the board at least boot correctly
> put both mmc controllers into fifo-mode, which also circumvents the
> issue for now.
> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

Hi,

is this also needed on RK3399 based machines?  I have a NanoPC-T4,
where the eMMC is on the Arasan controller and the SD card on the
dwmmc.  So if I boot from SD card I need this as well?

Patrick