linux-kernel - Re: [PATCH 1/4] drm/bridge: dw-hdmi: Add function to get plat

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Message-ID: <aHpzElP09pEOi4id@lizhi-Precision-Tower-5810>
Date: Fri, 18 Jul 2025 12:15:14 -0400
From: Frank Li <Frank.li@....com>
To: Shengjiu Wang <shengjiu.wang@....com>
Cc: 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,
	simona@...ll.ch, lumag@...nel.org, dianders@...omium.org,
	cristian.ciocaltea@...labora.com, luca.ceresoli@...tlin.com,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	victor.liu@....com, shawnguo@...nel.org, s.hauer@...gutronix.de,
	kernel@...gutronix.de, festevam@...il.com, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, p.zabel@...gutronix.de,
	devicetree@...r.kernel.org, l.stach@...gutronix.de,
	shengjiu.wang@...il.com
Subject: Re: [PATCH 1/4] drm/bridge: dw-hdmi: Add function to get plat_data

On Fri, Jul 18, 2025 at 06:11:47PM +0800, Shengjiu Wang wrote:
> The enable_audio() and disable_audio() callback pointers are in
> plat_data structure, and the audio device driver needs to get plat_data
> for assign these pointers. So add a function to export plat_data
> structure.

drm/bridge: dw-hdmi: Add API dw_hdmi_to_plat_data() to get plat_data

Add API dw_hdmi_to_plat_data() to fetch plat_data because audo device
driver needs it to enabe(disable)_audio().

Frank

>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 6 ++++++
>  include/drm/bridge/dw_hdmi.h              | 1 +
>  2 files changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 76c6570e2a85..3dfa42178f6c 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -198,6 +198,12 @@ struct dw_hdmi {
>  	enum drm_connector_status last_connector_result;
>  };
>
> +const struct dw_hdmi_plat_data *dw_hdmi_to_plat_data(struct dw_hdmi *hdmi)
> +{
> +	return hdmi->plat_data;
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_to_plat_data);
> +
>  #define HDMI_IH_PHY_STAT0_RX_SENSE \
>  	(HDMI_IH_PHY_STAT0_RX_SENSE0 | HDMI_IH_PHY_STAT0_RX_SENSE1 | \
>  	 HDMI_IH_PHY_STAT0_RX_SENSE2 | HDMI_IH_PHY_STAT0_RX_SENSE3)
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index 6a46baa0737c..a56a3519a22a 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -208,4 +208,5 @@ void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
>
>  bool dw_hdmi_bus_fmt_is_420(struct dw_hdmi *hdmi);
>
> +const struct dw_hdmi_plat_data *dw_hdmi_to_plat_data(struct dw_hdmi *hdmi);
>  #endif /* __IMX_HDMI_H__ */
> --
> 2.34.1
>