Re: [PATCH v17 14/21] drm/mediatek: add ETHDR support for MT8195

[Nancy.Lin <nancy.lin@mediatek.com>]

Hi Philipp,

Thanks for the review.

On Mon, 2022-04-25 at 12:00 +0200, Philipp Zabel wrote:
> On Sa, 2022-04-16 at 10:07 +0800, Nancy.Lin wrote:
> > ETHDR is a part of ovl_adaptor.
> > ETHDR is designed for HDR video and graphics conversion in the
> > external
> > display path. It handles multiple HDR input types and performs tone
> > mapping, color space/color format conversion, and then combine
> > different layers, output the required HDR or SDR signal to the
> > subsequent display path.
> > 
> > Signed-off-by: Nancy.Lin <nancy.lin@mediatek.com>
> > Reviewed-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@collabora.com>
> > ---
> 
> [...]
> > +static int mtk_ethdr_probe(struct platform_device *pdev)
> > +{
> > +	struct device *dev = &pdev->dev;
> > +	struct mtk_ethdr *priv;
> > +	int ret;
> > +	int i;
> > +
> > +	dev_info(dev, "%s+\n", __func__);
> 
> Left-over debug statements?
> 
Yes, I will remove the redundent log.

Regards,
Nancy

> > +
> > +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> > +	if (!priv)
> > +		return -ENOMEM;
> > +
> > +	for (i = 0; i < ETHDR_ID_MAX; i++) {
> > +		priv->ethdr_comp[i].dev = dev;
> > +		priv->ethdr_comp[i].regs = of_iomap(dev->of_node, i);
> > +#if IS_REACHABLE(CONFIG_MTK_CMDQ)
> > +		ret = cmdq_dev_get_client_reg(dev,
> > +					      &priv-
> > >ethdr_comp[i].cmdq_base, i);
> > +		if (ret)
> > +			dev_dbg(dev, "get mediatek,gce-client-reg
> > fail!\n");
> > +#endif
> > +		dev_dbg(dev, "[DRM]regs:0x%p, node:%d\n", priv-
> > >ethdr_comp[i].regs, i);
> > +	}
> > +
> > +	for (i = 0; i < ETHDR_CLK_NUM; i++)
> > +		priv->ethdr_clk[i].id = ethdr_clk_str[i];
> > +	ret = devm_clk_bulk_get_optional(dev, ETHDR_CLK_NUM, priv-
> > >ethdr_clk);
> > +	if (ret)
> > +		return ret;
> > +
> > +	priv->irq = platform_get_irq(pdev, 0);
> > +	if (priv->irq < 0)
> > +		priv->irq = 0;
> > +
> > +	if (priv->irq) {
> > +		ret = devm_request_irq(dev, priv->irq,
> > mtk_ethdr_irq_handler,
> > +				       IRQF_TRIGGER_NONE,
> > dev_name(dev), priv);
> > +		if (ret < 0) {
> > +			dev_err(dev, "Failed to request irq %d: %d\n",
> > priv->irq, ret);
> > +			return ret;
> > +		}
> > +	}
> > +
> > +	priv->reset_ctl =
> > devm_reset_control_array_get_optional_exclusive(dev);
> 
> This is missing error handling. You could use dev_err_probe() here.
> 
> regards
> Philipp

OK, I will add error handling in the next revision. Thank you.

Regards,
Nancy