linux-kernel - Re: [PATCH v3 2/3] drm: bridge: add it66121 driver

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Message-ID: <3266977b-9d19-c81d-6fd7-b6fa0714b1ef@baylibre.com>
Date:   Wed, 14 Apr 2021 08:13:08 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Robert Foss <robert.foss@...aro.org>
Cc:     Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        paul@...pouillou.net, Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Phong LE <ple@...libre.com>
Subject: Re: [PATCH v3 2/3] drm: bridge: add it66121 driver

Hi Rob,

Le 13/04/2021 à 22:21, Robert Foss a écrit :
> Hey Neil & Phong,
> 
> Thanks for submitting this series!
> 
>> +
>> +static const struct drm_bridge_funcs it66121_bridge_funcs = {
>> +       .attach = it66121_bridge_attach,
>> +       .enable = it66121_bridge_enable,
>> +       .disable = it66121_bridge_disable,
>> +       .mode_set = it66121_bridge_mode_set,
>> +       .mode_valid = it66121_bridge_mode_valid,
>> +       .detect = it66121_bridge_detect,
>> +       .get_edid = it66121_bridge_get_edid,
>> +       .atomic_get_output_bus_fmts = it66121_bridge_atomic_get_output_bus_fmts,
>> +       .atomic_get_input_bus_fmts = it66121_bridge_atomic_get_input_bus_fmts,
>> +};
> 
> I would like to see an implementation of HPD, since it is supported by
> the hardware[1] (and required by the documentation). IRQ status bit 0
> seems to be the responsible for notifying us about hot plug detection
> events.

It's implemented in the IRQ handler with the IT66121_INT_STATUS1_HPD_STATUS event.

Neil

> 
> [1] https://rockchip.fr/radxa/IT66121_Programming_Guide.v1.05.pdf
> 
> 
> Rob.
>