[PATCH v5 20/24] drm/bridge: dw-hdmi: Provide ddc symlink in connector sysfs directory

[Andrzej Pietrasiewicz]

Use the ddc pointer provided by the generic connector.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p at collabora.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 46 ++++++++++++-----------
 1 file changed, 24 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 218a7b2308f7..1ff6d2cf6f3a 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;
@@ -1133,7 +1132,7 @@ 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 */
@@ -1171,10 +1170,11 @@ 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);
@@ -1765,6 +1765,7 @@ 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
@@ -1774,13 +1775,12 @@ 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
@@ -1796,7 +1796,7 @@ 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);
 		}
 	}
 
@@ -2142,10 +2142,10 @@ 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);
@@ -2200,8 +2200,10 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
 
 	drm_connector_helper_add(connector, &dw_hdmi_connector_helper_funcs);
 
-	drm_connector_init(bridge->dev, connector, &dw_hdmi_connector_funcs,
-			   DRM_MODE_CONNECTOR_HDMIA);
+	drm_connector_init_with_ddc(bridge->dev, connector,
+				    &dw_hdmi_connector_funcs,
+				    DRM_MODE_CONNECTOR_HDMIA,
+				    connector->ddc);
 
 	drm_connector_attach_encoder(connector, encoder);
 
@@ -2563,9 +2565,9 @@ __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);
 		}
@@ -2704,7 +2706,7 @@ __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)) {
@@ -2723,9 +2725,9 @@ __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;
@@ -2791,7 +2793,7 @@ __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)
@@ -2803,7 +2805,7 @@ __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);
 }
@@ -2829,7 +2831,7 @@ 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);
 }
 
 /* -----------------------------------------------------------------------------
-- 
2.17.1