linux-kernel - Re: [PATCH v4 5/9] ARM: imx_v6_v7_defconfig: build imx sdma driver as module

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Date:   Mon, 20 Sep 2021 16:52:38 +0200
From:   Marek Vasut <marex@...x.de>
To:     Marcel Ziswiler <marcel@...wiler.com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Fabio Estevam <festevam@...il.com>,
        Andreas Kemnade <andreas@...nade.info>,
        NXP Linux Team <linux-imx@....com>,
        Pascal Zimmermann <pzimmermann@...electronics.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Russell King <linux@...linux.org.uk>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 5/9] ARM: imx_v6_v7_defconfig: build imx sdma driver as
 module

On 9/20/21 4:49 PM, Marcel Ziswiler wrote:
> From: Marcel Ziswiler <marcel.ziswiler@...adex.com>
> 
> Build CONFIG_IMX_SDMA as a module to avoid the following boot issue:
> 
> [    5.214751] imx-sdma 20ec000.sdma: Direct firmware load for
>   imx/sdma/sdma-imx6q.bin failed with error -2
> [    5.215762] imx-sdma 20ec000.sdma: Falling back to sysfs fallback
>   for: imx/sdma/sdma-imx6q.bin

Isn't there some ROM-side SDMA firmware baked into the MX6 which is used 
as a fallback if loading newer one from filesystem fails ? I suspect the 
default ROM firmware might be buggy.