Re: [PATCH v4 19/23] drm/bridge: dw-hdmi: Provide ddc symlink in connector sysfs directory

[Neil Armstrong <narmstrong-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>]

On 11/07/2019 13:26, Andrzej Pietrasiewicz wrote:
> Use the ddc pointer provided by the generic connector.
> 
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 40 +++++++++++------------
>  1 file changed, 20 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index c6490949d9db..0b9c9f2619da 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -161,7 +161,6 @@ struct dw_hdmi {
>  
>  	struct drm_display_mode previous_mode;
>  
> -	struct i2c_adapter *ddc;
>  	void __iomem *regs;
>  	bool sink_is_hdmi;
>  	bool sink_has_audio;
> @@ -1118,7 +1117,7 @@ static bool dw_hdmi_support_scdc(struct dw_hdmi *hdmi)
>  		return false;
>  
>  	/* Disable if no DDC bus */
> -	if (!hdmi->ddc)
> +	if (!hdmi->connector.ddc)
>  		return false;
>  
>  	/* Disable if SCDC is not supported, or if an HF-VSDB block is absent */
> @@ -1156,10 +1155,11 @@ void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi)
>  
>  	/* Control for TMDS Bit Period/TMDS Clock-Period Ratio */
>  	if (dw_hdmi_support_scdc(hdmi)) {
> +		struct i2c_adapter *ddc = hdmi->connector.ddc;
>  		if (mtmdsclock > HDMI14_MAX_TMDSCLK)
> -			drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 1);
> +			drm_scdc_set_high_tmds_clock_ratio(ddc, 1);
>  		else
> -			drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 0);
> +			drm_scdc_set_high_tmds_clock_ratio(ddc, 0);
>  	}
>  }
>  EXPORT_SYMBOL_GPL(dw_hdmi_set_high_tmds_clock_ratio);
> @@ -1750,6 +1750,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
>  	if (dw_hdmi_support_scdc(hdmi)) {
>  		if (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
>  		    hdmi_info->scdc.scrambling.low_rates) {
> +			struct i2c_adapter *ddc = hdmi->connector.ddc;
>  			/*
>  			 * HDMI2.0 Specifies the following procedure:
>  			 * After the Source Device has determined that
> @@ -1759,13 +1760,12 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
>  			 * Source Devices compliant shall set the
>  			 * Source Version = 1.
>  			 */
> -			drm_scdc_readb(hdmi->ddc, SCDC_SINK_VERSION,
> -				       &bytes);
> -			drm_scdc_writeb(hdmi->ddc, SCDC_SOURCE_VERSION,
> +			drm_scdc_readb(ddc, SCDC_SINK_VERSION, &bytes);
> +			drm_scdc_writeb(ddc, SCDC_SOURCE_VERSION,
>  				min_t(u8, bytes, SCDC_MIN_SOURCE_VERSION));
>  
>  			/* Enabled Scrambling in the Sink */
> -			drm_scdc_set_scrambling(hdmi->ddc, 1);
> +			drm_scdc_set_scrambling(hdmi->connector.ddc, 1);
>  
>  			/*
>  			 * To activate the scrambler feature, you must ensure
> @@ -1781,7 +1781,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
>  			hdmi_writeb(hdmi, 0, HDMI_FC_SCRAMBLER_CTRL);
>  			hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ,
>  				    HDMI_MC_SWRSTZ);
> -			drm_scdc_set_scrambling(hdmi->ddc, 0);
> +			drm_scdc_set_scrambling(hdmi->connector.ddc, 0);
>  		}
>  	}
>  
> @@ -2127,10 +2127,10 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  	struct edid *edid;
>  	int ret = 0;
>  
> -	if (!hdmi->ddc)
> +	if (!hdmi->connector.ddc)
>  		return 0;
>  
> -	edid = drm_get_edid(connector, hdmi->ddc);
> +	edid = drm_get_edid(connector, hdmi->connector.ddc);
>  	if (edid) {
>  		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
>  			edid->width_cm, edid->height_cm);
> @@ -2548,9 +2548,9 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  
>  	ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
>  	if (ddc_node) {
> -		hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node);
> +		hdmi->connector.ddc = of_get_i2c_adapter_by_node(ddc_node);
>  		of_node_put(ddc_node);
> -		if (!hdmi->ddc) {
> +		if (!hdmi->connector.ddc) {
>  			dev_dbg(hdmi->dev, "failed to read ddc node\n");
>  			return ERR_PTR(-EPROBE_DEFER);
>  		}
> @@ -2689,7 +2689,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  	hdmi_init_clk_regenerator(hdmi);
>  
>  	/* If DDC bus is not specified, try to register HDMI I2C bus */
> -	if (!hdmi->ddc) {
> +	if (!hdmi->connector.ddc) {
>  		/* Look for (optional) stuff related to unwedging */
>  		hdmi->pinctrl = devm_pinctrl_get(dev);
>  		if (!IS_ERR(hdmi->pinctrl)) {
> @@ -2708,9 +2708,9 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  			}
>  		}
>  
> -		hdmi->ddc = dw_hdmi_i2c_adapter(hdmi);
> -		if (IS_ERR(hdmi->ddc))
> -			hdmi->ddc = NULL;
> +		hdmi->connector.ddc = dw_hdmi_i2c_adapter(hdmi);
> +		if (IS_ERR(hdmi->connector.ddc))
> +			hdmi->connector.ddc = NULL;
>  	}
>  
>  	hdmi->bridge.driver_private = hdmi;
> @@ -2776,7 +2776,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  err_iahb:
>  	if (hdmi->i2c) {
>  		i2c_del_adapter(&hdmi->i2c->adap);
> -		hdmi->ddc = NULL;
> +		hdmi->connector.ddc = NULL;
>  	}
>  
>  	if (hdmi->cec_notifier)
> @@ -2788,7 +2788,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  err_isfr:
>  	clk_disable_unprepare(hdmi->isfr_clk);
>  err_res:
> -	i2c_put_adapter(hdmi->ddc);
> +	i2c_put_adapter(hdmi->connector.ddc);
>  
>  	return ERR_PTR(ret);
>  }
> @@ -2814,7 +2814,7 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
>  	if (hdmi->i2c)
>  		i2c_del_adapter(&hdmi->i2c->adap);
>  	else
> -		i2c_put_adapter(hdmi->ddc);
> +		i2c_put_adapter(hdmi->connector.ddc);
>  }
>  
>  /* -----------------------------------------------------------------------------
> 

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
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