linux-kernel - Re: [PATCH v1 12/17] drm/mediatek: hdmi: mt8195: add audio support

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Date:   Tue, 20 Sep 2022 13:11:36 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Guillaume Ranquet <granquet@...libre.com>,
        Vinod Koul <vkoul@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>, Jitao shi <jitao.shi@...iatek.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org,
        Pablo Sun <pablo.sun@...iatek.com>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Mattijs Korpershoek <mkorpershoek@...libre.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v1 12/17] drm/mediatek: hdmi: mt8195: add audio support

Il 19/09/22 18:56, Guillaume Ranquet ha scritto:
> Add HDMI audio support for mt8195
> 
> Signed-off-by: Guillaume Ranquet <granquet@...libre.com>
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_mt8195_hdmi.c b/drivers/gpu/drm/mediatek/mtk_mt8195_hdmi.c
> index 39e07a6dd490..bb7593ea4c86 100644
> --- a/drivers/gpu/drm/mediatek/mtk_mt8195_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_mt8195_hdmi.c
> @@ -215,6 +215,26 @@ static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black)
>   		mtk_hdmi_mask(hdmi, TOP_VMUTE_CFG1, 0, REG_VMUTE_EN);
>   }
>   
> +static void mtk_hdmi_hw_aud_mute(struct mtk_hdmi *hdmi)
> +{
> +	u32 val;
> +
> +	val = mtk_hdmi_read(hdmi, AIP_CTRL, &val);
> +

val_tx = AUD_MUTE_FIFO_EN;
if (val & DSD_EN)
	val_tx |= DSD_MUTE_DATA;

regmap_set_bits(regmap, AIP_TXCTRL, val_tx);

Easier, shorter.

> +	if (val & DSD_EN)
> +		mtk_hdmi_mask(hdmi, AIP_TXCTRL,
> +			      DSD_MUTE_DATA | AUD_MUTE_FIFO_EN,
> +			      DSD_MUTE_DATA | AUD_MUTE_FIFO_EN);
> +	else
> +		mtk_hdmi_mask(hdmi, AIP_TXCTRL, AUD_MUTE_FIFO_EN,
> +			      AUD_MUTE_FIFO_EN);
> +}

Regards,
Angelo