linux-kernel - Re: [PATCH v1 7/7] drm/mediatek: Introduce HDMI/DDC v2 for MT8195/MT8188

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Message-ID: <d9ca3245c89813d78e7a25aa9d4a0868fb30d27e.camel@mediatek.com>
Date: Thu, 5 Dec 2024 03:40:01 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>
CC: "robh@...nel.org" <robh@...nel.org>, "tzimmermann@...e.de"
	<tzimmermann@...e.de>, "simona@...ll.ch" <simona@...ll.ch>,
	"mripard@...nel.org" <mripard@...nel.org>, "kernel@...labora.com"
	<kernel@...labora.com>, "linux-mediatek@...ts.infradead.org"
	<linux-mediatek@...ts.infradead.org>, "maarten.lankhorst@...ux.intel.com"
	<maarten.lankhorst@...ux.intel.com>, "dri-devel@...ts.freedesktop.org"
	<dri-devel@...ts.freedesktop.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "conor+dt@...nel.org" <conor+dt@...nel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"krzk+dt@...nel.org" <krzk+dt@...nel.org>, "p.zabel@...gutronix.de"
	<p.zabel@...gutronix.de>, "airlied@...il.com" <airlied@...il.com>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>
Subject: Re: [PATCH v1 7/7] drm/mediatek: Introduce HDMI/DDC v2 for
 MT8195/MT8188

Hi, Angelo:

On Wed, 2024-11-20 at 13:45 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
> 
> 
> Add support for the newer HDMI-TX (Encoder) v2 and DDC v2 IPs
> found in MediaTek's MT8195, MT8188 SoC and their variants, and
> including support for display modes up to 4k60 and for HDMI
> Audio, as per the HDMI 2.0 spec.
> 
> HDCP and CEC functionalities are also supported by this hardware,
> but are not included in this commit.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---

[snip]

> +static int mtk_hdmi_v2_audio_hw_params(struct device *dev, void *data,
> +                                   struct hdmi_codec_daifmt *codec_daifmt,
> +                                   struct hdmi_codec_params *codec_params)
> +{

This function is almost the same as v1.
Try to make this function as common function.

Regards,
CK

> +       struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
> +       struct hdmi_audio_param aud_params = { 0 };
> +
> +       if (!hdmi->bridge.encoder)
> +               return -ENODEV;
> +
> +       switch (codec_params->cea.channels) {
> +       case 2:
> +               aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
> +               break;
> +       case 4:
> +               aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_4_0;
> +               break;
> +       case 6:
> +               aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_5_1;
> +               break;
> +       case 8:
> +               aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_7_1;
> +               break;
> +       default:
> +               return -EINVAL;
> +       }
> +
> +       switch (codec_params->sample_rate) {
> +       case 32000:
> +       case 44100:
> +       case 48000:
> +       case 88200:
> +       case 96000:
> +       case 176400:
> +       case 192000:
> +               break;
> +       default:
> +               return -EINVAL;
> +       }
> +
> +       switch (codec_daifmt->fmt) {
> +       case HDMI_I2S:
> +               aud_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
> +               aud_params.aud_sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
> +               aud_params.aud_input_type = HDMI_AUD_INPUT_I2S;
> +               aud_params.aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
> +               aud_params.aud_mclk = HDMI_AUD_MCLK_128FS;
> +               break;
> +       default:
> +               return -EINVAL;
> +       }
> +
> +       memcpy(&aud_params.codec_params, codec_params, sizeof(aud_params.codec_params));
> +       mtk_hdmi_v2_audio_set_param(hdmi, &aud_params);
> +
> +       return 0;
> +}
> +

>