linux-kernel - Re: [PATCH v2 2/3] Added Xilinx XDMA IP core driver

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Message-ID: <e084352e-a784-accd-f267-9e0c30c7a92b@gpxsee.org>
Date:   Wed, 21 Sep 2022 11:25:50 +0200
From:   Martin Tůma <tumic@...see.org>
To:     lizhi.hou@....com
Cc:     dmaengine@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        martin.tuma@...iteqautomotive.com, mchehab@...nel.org,
        michal.simek@...inx.com, tumic@...see.org, vkoul@...nel.org
Subject: Re: [PATCH v2 2/3] Added Xilinx XDMA IP core driver

 > Currently, the V3 patch series does not support register user logic
 > interrupt yet.

This is a showstopper for almost every XDMA based PCIe card. As the 
driver "consumes" the whole register space (including the user IRQs 
enable/disable registers), there is AFAIK no way how to enable the user 
IRQs when this driver is loaded.

 > Could you convert your driver to use this?

Not without the user IRQs.

M.