linux-kernel - Re: [PATCH v11] drm/bridge: add it6505 driver

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Message-ID: <90ec652d-6df7-3e7b-dd81-7ced053e1dcf@collabora.com>
Date:   Tue, 1 Feb 2022 09:54:47 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Robert Foss <robert.foss@...aro.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>
Cc:     allen <allen.chen@....com.tw>,
        Kenneth Hung <Kenneth.Hung@....com.tw>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Jau-Chih Tseng <Jau-Chih.Tseng@....com.tw>,
        David Airlie <airlied@...ux.ie>,
        "open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        open list <linux-kernel@...r.kernel.org>,
        Jonas Karlman <jonas@...boo.se>,
        Hermes Wu <Hermes.Wu@....com.tw>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Hsin-Yi Wang <hsinyi@...gle.com>
Subject: Re: [PATCH v11] drm/bridge: add it6505 driver

Il 31/01/22 19:36, Robert Foss ha scritto:
> On Mon, 31 Jan 2022 at 17:55, Hsin-Yi Wang <hsinyi@...omium.org> wrote:
>>
>> On Tue, Feb 1, 2022 at 12:37 AM Robert Foss <robert.foss@...aro.org> wrote:
>>>
>>> On Thu, 20 Jan 2022 at 16:25, AngeloGioacchino Del Regno
>>> <angelogioacchino.delregno@...labora.com> wrote:
>>>>
>>>> Il 14/01/22 10:14, allen ha scritto:
>>>>> This adds support for the iTE IT6505.
>>>>> This device can convert DPI signal to DP output.
>>>>>
>>>>> From: Allen Chen <allen.chen@....com.tw>
>>>>> Tested-by: Hsin-yi Wang <hsinyi@...omium.org>
>>>>> Signed-off-by: Hermes Wu <hermes.wu@....com.tw>
>>>>> Signed-off-by: Allen Chen <allen.chen@....com.tw>
>>>>> ---
>>>>> v10 -> v11 : remove drm_bridge_new_crtc_state
>>>>> ---
>>>>>    drivers/gpu/drm/bridge/Kconfig      |    8 +
>>>>>    drivers/gpu/drm/bridge/Makefile     |    1 +
>>>>>    drivers/gpu/drm/bridge/ite-it6505.c | 3352 +++++++++++++++++++++++++++
>>>>>    3 files changed, 3361 insertions(+)
>>>>>    create mode 100644 drivers/gpu/drm/bridge/ite-it6505.c
>>>>>
>>>>
>>>> ...snip...
>>>>
>>>>> +static const struct of_device_id it6505_of_match[] = {
>>>>> +     { .compatible = "ite,it6505" },
>>>>> +     { }
>>>>> +};
>>>>
>>>> If you want to have a DT compatible and DT properties, you have to also add
>>>> dt-bindings (yaml) for this driver, otherwise, any SoC/device DT will fail
>>>> the dt binding check.... So, please, add that.
>>>
>>> Let me second this. A dt-binding is needed for this driver to be
>>> complete, it functions as both documentation and a way to test the DTS
>>> that use this device, so it is really important.
>>>
>> The binding seems to be accepted before the driver:
>> https://elixir.bootlin.com/linux/v5.16.4/source/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> 
> I completely missed that. In that case we're only missing the
> reviewed-by tag from someone.
> 

You have mine... the intention was to give a Reviewed-by, not a Acked-by - I'm
sorry for that, I was sending more than one email and the wrong tag slipped
through.

So, please change my Acked-by tag to

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

>>
>>>>
>>>> For the driver by itself, though:
>>>>
>>>> Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
>>>>
>>>>> +
>>>>> +static struct i2c_driver it6505_i2c_driver = {
>>>>> +     .driver = {
>>>>> +             .name = "it6505",
>>>>> +             .of_match_table = it6505_of_match,
>>>>> +             .pm = &it6505_bridge_pm_ops,
>>>>> +     },
>>>>> +     .probe = it6505_i2c_probe,
>>>>> +     .remove = it6505_i2c_remove,
>>>>> +     .shutdown = it6505_shutdown,
>>>>> +     .id_table = it6505_id,
>>>>> +};
>>>>> +
>>>>> +module_i2c_driver(it6505_i2c_driver);
>>>>> +
>>>>> +MODULE_AUTHOR("Allen Chen <allen.chen@....com.tw>");
>>>>> +MODULE_DESCRIPTION("IT6505 DisplayPort Transmitter driver");
>>>>> +MODULE_LICENSE("GPL v2");
>>>>>
>>>>