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

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Message-ID: <CAG3jFysFb+y6ymXsBQatuwtPEYRTBnWTku0EpmNyR2gR5a=Y2w@mail.gmail.com>
Date:   Tue, 13 Apr 2021 22:21:13 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Neil Armstrong <narmstrong@...libre.com>
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

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.

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


Rob.