[PATCH 03/14] drm/bridge: dw-hdmi: Commonize dw_hdmi_i2c_adapter()

[Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>]

In preparation to add support for the HDMI 2.1 Quad-Pixel TX Controller
and minimize code duplication, export dw_hdmi_i2c_adapter() while adding
a new parameter to allow using a different i2c_algorithm.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi-common.h | 2 ++
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c        | 8 +++++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-common.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-common.h
index 28e26ac142e6..ffd2ee16466c 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-common.h
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-common.h
@@ -146,6 +146,8 @@ struct dw_hdmi {
 };
 
 void dw_handle_plugged_change(struct dw_hdmi *hdmi, bool plugged);
+struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi,
+					const struct i2c_algorithm *algo);
 bool dw_hdmi_support_scdc(struct dw_hdmi *hdmi,
 			  const struct drm_display_info *display);
 
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index b66877771f56..5dd0e2bc080d 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -376,7 +376,8 @@ static const struct i2c_algorithm dw_hdmi_algorithm = {
 	.functionality	= dw_hdmi_i2c_func,
 };
 
-static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi)
+struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi,
+					const struct i2c_algorithm *algo)
 {
 	struct i2c_adapter *adap;
 	struct dw_hdmi_i2c *i2c;
@@ -392,7 +393,7 @@ static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi)
 	adap = &i2c->adap;
 	adap->owner = THIS_MODULE;
 	adap->dev.parent = hdmi->dev;
-	adap->algo = &dw_hdmi_algorithm;
+	adap->algo = algo ? algo : &dw_hdmi_algorithm;
 	strscpy(adap->name, "DesignWare HDMI", sizeof(adap->name));
 	i2c_set_adapdata(adap, hdmi);
 
@@ -409,6 +410,7 @@ static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi)
 
 	return adap;
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_i2c_adapter);
 
 static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts,
 			   unsigned int n)
@@ -3373,7 +3375,7 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
 			}
 		}
 
-		hdmi->ddc = dw_hdmi_i2c_adapter(hdmi);
+		hdmi->ddc = dw_hdmi_i2c_adapter(hdmi, NULL);
 		if (IS_ERR(hdmi->ddc))
 			hdmi->ddc = NULL;
 	}

-- 
2.45.0