linux-kernel - Re: [PATCH v1 2/2] drm/tegra: Use drm_dp_aux_register

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Message-ID: <71fcbc09-5b60-ee76-49b2-94adc965eda5@gmail.com>
Date:   Tue, 9 Nov 2021 17:17:06 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Lyude Paul <lyude@...hat.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Thomas Graichen <thomas.graichen@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/2] drm/tegra: Use drm_dp_aux_register_ddc/chardev()
 helpers

09.11.2021 17:08, Dmitry Osipenko пишет:
>> +static void host1x_drm_dev_deinit(struct host1x_device *dev)
>> +{
>> +	struct drm_device *drm = dev_get_drvdata(&dev->dev);
> And platform_unregister_drivers() should be moved here.
> 

Nah, that should cause deadlock. This ad-hoc is too lame.

Another solution is to defer probing of DP AUX driver while
tegra_drm_device() returns NULL, but it's icky.

Reverting the original DP AUX DDC registration order is the best option
so far, IMO.