Re: [PATCH v4 5/9] ARM: imx_v6_v7_defconfig: build imx sdma driver as module
From: Marek Vasut <marex@denx.de>
Date: 2021-09-20 16:16:54
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On 9/20/21 5:55 PM, Marcel Ziswiler wrote:
On Mon, 2021-09-20 at 16:52 +0200, Marek Vasut wrote:quoted
On 9/20/21 4:49 PM, Marcel Ziswiler wrote:quoted
From: Marcel Ziswiler <redacted> 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.binIsn'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.I'm not so sure about this. At least it seems to fail if no external firmware can be loaded.
See e.g. SDMA chapter in MX6SDLRM or similar, it does talk about 4k boot ROM, which contains scripts and utilities later referenced by scripts in RAM. It might be worth looking into that a bit further, but that seems like a separate topic from this patch. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel