linux-kernel - Re: [PATCH v3 04/10] phy: Add HDMI configuration options

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Date:   Thu, 10 Nov 2022 13:08:50 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Sandor Yu <Sandor.yu@....com>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, andrzej.hajda@...el.com,
        neil.armstrong@...aro.org, robert.foss@...aro.org,
        Laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, linux-imx@....com,
        tzimmermann@...e.de, lyude@...hat.com, javierm@...hat.com,
        ville.syrjala@...ux.intel.com, sam@...nborg.org,
        jani.nikula@...el.com, maxime@...no.tech,
        penguin-kernel@...ove.sakura.ne.jp, oliver.brown@....com
Subject: Re: [PATCH v3 04/10] phy: Add HDMI configuration options

On 08-11-22, 21:00, Sandor Yu wrote:
> Allow HDMI PHYs to be configured through the generic
> functions through a custom structure added to the generic union.
> 
> The parameters added here are based on HDMI PHY
> implementation practices.  The current set of parameters
> should cover the potential users.

Is there any dpendency b/w phy and hdmi, I dont see anything in cover..

Pls consider splitting the phy series ..

> 
> Signed-off-by: Sandor Yu <Sandor.yu@....com>
> ---
>  include/linux/phy/phy-hdmi.h | 33 +++++++++++++++++++++++++++++++++
>  include/linux/phy/phy.h      |  7 ++++++-
>  2 files changed, 39 insertions(+), 1 deletion(-)
>  create mode 100644 include/linux/phy/phy-hdmi.h
> 
> diff --git a/include/linux/phy/phy-hdmi.h b/include/linux/phy/phy-hdmi.h
> new file mode 100644
> index 000000000000..73a32eb535b0
> --- /dev/null
> +++ b/include/linux/phy/phy-hdmi.h
> @@ -0,0 +1,33 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright 2022 NXP
> + */
> +
> +#ifndef __PHY_HDMI_H_
> +#define __PHY_HDMI_H_
> +
> +enum hdmi_phy_colorspace {
> +	HDMI_PHY_COLORSPACE_RGB,
> +	HDMI_PHY_COLORSPACE_YUV422,
> +	HDMI_PHY_COLORSPACE_YUV444,
> +	HDMI_PHY_COLORSPACE_YUV420,
> +	HDMI_PHY_COLORSPACE_RESERVED4,
> +	HDMI_PHY_COLORSPACE_RESERVED5,
> +	HDMI_PHY_COLORSPACE_RESERVED6,
> +};

kernel-doc style comments here too please

> +
> +/**
> + * struct phy_configure_opts_hdmi - HDMI configuration set
> + * @pixel_clk_rate:	Pixel clock of video modes in KHz.
> + * @bpc: Maximum bits per color channel.
> + * @color_space: Colorspace in enum hdmi_phy_colorspace.
> + *
> + * This structure is used to represent the configuration state of a HDMI phy.
> + */
> +struct phy_configure_opts_hdmi {
> +	unsigned int pixel_clk_rate;
> +	unsigned int bpc;
> +	enum hdmi_phy_colorspace color_space;
> +};
> +
> +#endif /* __PHY_HDMI_H_ */
> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> index b1413757fcc3..6f6873ea7270 100644
> --- a/include/linux/phy/phy.h
> +++ b/include/linux/phy/phy.h
> @@ -17,6 +17,7 @@
>  #include <linux/regulator/consumer.h>
>  
>  #include <linux/phy/phy-dp.h>
> +#include <linux/phy/phy-hdmi.h>
>  #include <linux/phy/phy-lvds.h>
>  #include <linux/phy/phy-mipi-dphy.h>
>  
> @@ -42,7 +43,8 @@ enum phy_mode {
>  	PHY_MODE_MIPI_DPHY,
>  	PHY_MODE_SATA,
>  	PHY_MODE_LVDS,
> -	PHY_MODE_DP
> +	PHY_MODE_DP,
> +	PHY_MODE_HDMI,
>  };
>  
>  enum phy_media {
> @@ -60,11 +62,14 @@ enum phy_media {
>   *		the DisplayPort protocol.
>   * @lvds:	Configuration set applicable for phys supporting
>   *		the LVDS phy mode.
> + * @hdmi:	Configuration set applicable for phys supporting
> + *		the HDMI phy mode.
>   */
>  union phy_configure_opts {
>  	struct phy_configure_opts_mipi_dphy	mipi_dphy;
>  	struct phy_configure_opts_dp		dp;
>  	struct phy_configure_opts_lvds		lvds;
> +	struct phy_configure_opts_hdmi		hdmi;
>  };
>  
>  /**
> -- 
> 2.34.1

-- 
~Vinod