linux-kernel - Re: [PATCH 4/4] drm/mediatek: mtk_dpi: Use devm_platform_get_and_ioremap

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Date:   Thu, 13 Jul 2023 13:14:00 +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 4/4] drm/mediatek: mtk_dpi: Use
 devm_platform_get_and_ioremap_resource()

Il 13/07/23 10:34, Fei Shao ha scritto:
> Hi Angelo,
> 
> On Wed, Apr 12, 2023 at 7:53 PM AngeloGioacchino Del Regno
> <angelogioacchino.delregno@...labora.com> wrote:
>>
>> Instead of the open-coded platform_get_resource, devm_ioremap_resource
>> switch to devm_platform_get_and_ioremap_resource(), doing exactly the
>> same.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
>> ---
>>   drivers/gpu/drm/mediatek/mtk_dpi.c | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> index 9025111013d3..45535dc7970f 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> @@ -1038,8 +1038,7 @@ static int mtk_dpi_probe(struct platform_device *pdev)
>>                          dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
>>                  }
>>          }
>> -       mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> -       dpi->regs = devm_ioremap_resource(dev, mem);
>> +       dpi->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
> 
> "mem" appears to be unused elsewhere, so I assume
> devm_platform_ioremap_resource() would be a better fit.
> 

That's right. I'll switch to devm_platform_ioremap_resource() in v2.

Cheers,
Angelo

> Regards,
> Fei
> 
>>          if (IS_ERR(dpi->regs))
>>                  return dev_err_probe(dev, PTR_ERR(dpi->regs),
>>                                       "Failed to ioremap mem resource\n");
>> --
>> 2.40.0
>>
>>
>