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Message-ID: <0b45eae2-4081-febe-d062-6475d67a59cf@collabora.com>
Date: Thu, 13 Jul 2023 13:13:30 +0200
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: Fei Shao <fshao@...omium.org>
Cc: chunkuang.hu@...nel.org, p.zabel@...gutronix.de, airlied@...il.com,
daniel@...ll.ch, matthias.bgg@...il.com,
dri-devel@...ts.freedesktop.org,
linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH 3/4] drm/mediatek: mtk_dpi: Switch to
devm_drm_of_get_bridge()
Il 13/07/23 10:24, Fei Shao ha scritto:
> Hi Angelo,
>
> On Wed, Apr 12, 2023 at 7:53 PM AngeloGioacchino Del Regno
> <angelogioacchino.delregno@...labora.com> wrote:
>>
>> Function drm_of_find_panel_or_bridge() is marked as deprecated: since
>> the usage of that in this driver exactly corresponds to the new function
>> devm_drm_of_get_bridge(), switch to it.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
>> ---
>> drivers/gpu/drm/mediatek/mtk_dpi.c | 7 +++----
>> 1 file changed, 3 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> index 6be65ea21f8f..9025111013d3 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> @@ -1063,10 +1063,9 @@ static int mtk_dpi_probe(struct platform_device *pdev)
>> if (dpi->irq <= 0)
>> return -EINVAL;
>>
>> - ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
>> - NULL, &dpi->next_bridge);
>> - if (ret)
>> - return ret;
>> + dpi->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);
>> + if (IS_ERR(dpi->next_bridge))
>> + return PTR_ERR(dpi->next_bridge);
>
> The original code doesn't print any log so it's probably fine, but
> given you're already at it, perhaps you want to also make use of
> dev_err_probe() here?
> devm_drm_of_get_bridge() can also pass -EPROBE_DEFER from its wrapped
> drm_of_find_panel_or_bridge(). Furthermore, that will make the code
> visually align with your previous patch.
>
> But that's just optional, and since this patch works anyway,
>
> Reviewed-by: Fei Shao <fshao@...omium.org>
>
Thanks. Yeah it's a good idea to add an error print... since I will have
to anyway send a v2, I'll add it.
Cheers,
Angelo
>>
>> dev_info(dev, "Found bridge node: %pOF\n", dpi->next_bridge->of_node);
>>
>> --
>> 2.40.0
>>
>>
>
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