linux-kernel - Re: [PATCH v5 3/7] drm/mediatek: disable tmds on mt2701

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Date:   Wed, 19 Aug 2020 19:12:29 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Frank Wunderlich <linux@...web.de>,
        linux-mediatek@...ts.infradead.org
Cc:     Frank Wunderlich <frank-w@...lic-files.de>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>,
        linux-arm-kernel@...ts.infradead.org,
        chunhui dai <chunhui.dai@...iatek.com>
Subject: Re: [PATCH v5 3/7] drm/mediatek: disable tmds on mt2701



On 19/08/2020 10:17, Frank Wunderlich wrote:
> From: chunhui dai <chunhui.dai@...iatek.com>
> 
> disable tmds on phy on mt2701 to support other resolutions like 1280x1024
> 

Isn't that worth a Fixes tag?

Regards,
Matthias

> Signed-off-by: chunhui dai <chunhui.dai@...iatek.com>
> Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
> Tested-by: Frank Wunderlich <frank-w@...lic-files.de>
> ---
>   drivers/gpu/drm/mediatek/mtk_hdmi_phy.c        | 3 +++
>   drivers/gpu/drm/mediatek/mtk_hdmi_phy.h        | 1 +
>   drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c | 1 +
>   3 files changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> index 5223498502c4..edadb7a700f1 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> @@ -184,6 +184,9 @@ static int mtk_hdmi_phy_probe(struct platform_device *pdev)
>   		return PTR_ERR(phy_provider);
>   	}
>   
> +	if (hdmi_phy->conf->pll_default_off)
> +		hdmi_phy->conf->hdmi_phy_disable_tmds(hdmi_phy);
> +
>   	return of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
>   				   hdmi_phy->pll);
>   }
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
> index 2d8b3182470d..f472fdeb63dc 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
> @@ -22,6 +22,7 @@ struct mtk_hdmi_phy;
>   struct mtk_hdmi_phy_conf {
>   	bool tz_disabled;
>   	unsigned long flags;
> +	bool pll_default_off;
>   	const struct clk_ops *hdmi_phy_clk_ops;
>   	void (*hdmi_phy_enable_tmds)(struct mtk_hdmi_phy *hdmi_phy);
>   	void (*hdmi_phy_disable_tmds)(struct mtk_hdmi_phy *hdmi_phy);
> diff --git a/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> index d3cc4022e988..6fbedacfc1e8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> +++ b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> @@ -239,6 +239,7 @@ static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
>   struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf = {
>   	.tz_disabled = true,
>   	.flags = CLK_SET_RATE_GATE,
> +	.pll_default_off = true,
>   	.hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
>   	.hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds,
>   	.hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds,
>