linux-kernel - Re: [PATCH v4 09/10] drm/vs: Innosilicon HDMI support

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Date: Tue, 21 May 2024 11:31:43 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: keith <keith.zhao@...rfivetech.com>, andrzej.hajda@...el.com,
 neil.armstrong@...aro.org, rfoss@...nel.org,
 Laurent.pinchart@...asonboard.com, jonas@...boo.se,
 jernej.skrabec@...il.com, maarten.lankhorst@...ux.intel.com,
 mripard@...nel.org, tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch,
 robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 hjc@...k-chips.com, heiko@...ech.de, andy.yan@...k-chips.com,
 xingyu.wu@...rfivetech.com, p.zabel@...gutronix.de,
 jack.zhu@...rfivetech.com, shengyang.chen@...rfivetech.com
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 09/10] drm/vs: Innosilicon HDMI support

On 21/05/2024 12:58, keith wrote:
> add inno hdmi driver which binds to vs display controller
> and this driver uses the commom api from the inno hdmi
> 
> Signed-off-by: keith <keith.zhao@...rfivetech.com>
> ---

..

> +static int starfive_hdmi_bind(struct device *dev, struct device *master,
> +			      void *data)
> +{
> +	struct platform_device *pdev = to_platform_device(dev);
> +	struct drm_device *drm = dev_get_drvdata(master);
> +	struct stf_inno_hdmi *stf_hdmi;
> +	struct inno_hdmi *hdmi;
> +	struct resource *iores;
> +
> +	int ret;
> +	unsigned long long rate;
> +
> +	stf_hdmi = drmm_simple_encoder_alloc(drm, struct stf_inno_hdmi,
> +					     encoder, DRM_MODE_ENCODER_TMDS);
> +	hdmi = &stf_hdmi->inno_hdmi;
> +
> +	hdmi->dev = dev;
> +	hdmi->plat_data = (struct inno_hdmi_plat_data *)of_device_get_match_data(dev);
> +
> +	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	hdmi->regs = devm_ioremap_resource(dev, iores);

There's a helper combining these two.

> +	if (IS_ERR(hdmi->regs))
> +		return PTR_ERR(hdmi->regs);
> +
> +	ret = starfive_hdmi_get_clk_rst(dev, stf_hdmi);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = starfive_hdmi_enable_clk_rst(dev, stf_hdmi);
> +	if (ret)
> +		return ret;
> +
> +	rate = clk_get_rate(stf_hdmi->clk_hdmi[CLK_SYS].clk);
> +	inno_hdmi_i2c_init(hdmi, rate);
> +
> +	ret = inno_hdmi_bind(drm, hdmi, &stf_hdmi->encoder);
> +	if (ret)
> +		goto err_disable_clk;
> +
> +	dev_set_drvdata(dev, stf_hdmi);
> +
> +	return 0;
> +



Best regards,
Krzysztof