[PATCH 1/4] drm/bridge: dw-hdmi: Add function to get plat_data

[Liu Ying]

Hi Shengjiu,

On 07/18/2025, 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

{enable,disable}_audio pointers are directly assigned to plat_data in patch 2,
instead of using dw_hdmi_to_plat_data().  dw_hdmi_to_plat_data() is only
used in patch 2 to get hdmi_pai pointer through pdata->priv_audio.

const struct dw_hdmi_plat_data *pdata = dw_hdmi_to_plat_data(dw_hdmi);
struct imx8mp_hdmi_pai *hdmi_pai = (struct imx8mp_hdmi_pai *)pdata->priv_audio;

> structure.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.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);

Nit: Add a blank line as it was here.

>  #endif /* __IMX_HDMI_H__ */

-- 
Regards,
Liu Ying