From: Jagan Teki <jagan@edgeble.ai>
Date: Wed, 17 Jan 2024 07:51:40 +0000 (+0530)
Subject: video: dw_hdmi: Extend the HPD detection
X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/%7B%7B?a=commitdiff_plain;h=5eacb920710364d4c9134886725c3879d89972b1;p=u-boot.git

video: dw_hdmi: Extend the HPD detection

HPD detection on some DW HDMI designed SoC's would need to read and
setup the HPD status explicitly.

So, extend the HPD detection code by adding the dw_hdmi_detect_hpd
function and move the default detection code caller there.

The new read and setup hdp will integrate the same function in
later patches.

Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
---

diff --git a/drivers/video/dw_hdmi.c b/drivers/video/dw_hdmi.c
index 4914ba6146..3a3b9b7a21 100644
--- a/drivers/video/dw_hdmi.c
+++ b/drivers/video/dw_hdmi.c
@@ -936,6 +936,19 @@ int dw_hdmi_phy_wait_for_hpd(struct dw_hdmi *hdmi)
 	return -1;
 }
 
+int dw_hdmi_detect_hpd(struct dw_hdmi *hdmi)
+{
+	int ret;
+
+	ret = dw_hdmi_phy_wait_for_hpd(hdmi);
+	if (ret < 0) {
+		debug("hdmi can not get hpd signal\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
 void dw_hdmi_phy_init(struct dw_hdmi *hdmi)
 {
 	/* enable phy i2cm done irq */
diff --git a/drivers/video/rockchip/rk_hdmi.c b/drivers/video/rockchip/rk_hdmi.c
index 84b6a7ebcf..d31f6a4ff8 100644
--- a/drivers/video/rockchip/rk_hdmi.c
+++ b/drivers/video/rockchip/rk_hdmi.c
@@ -113,11 +113,9 @@ int rk_hdmi_probe(struct udevice *dev)
 	dw_hdmi_init(hdmi);
 	dw_hdmi_phy_init(hdmi);
 
-	ret = dw_hdmi_phy_wait_for_hpd(hdmi);
-	if (ret < 0) {
-		debug("hdmi can not get hpd signal\n");
-		return -1;
-	}
+	ret = dw_hdmi_detect_hpd(hdmi);
+	if (ret < 0)
+		return ret;
 
 	return 0;
 }
diff --git a/drivers/video/sunxi/sunxi_dw_hdmi.c b/drivers/video/sunxi/sunxi_dw_hdmi.c
index 986e69d66b..a5e8d39e98 100644
--- a/drivers/video/sunxi/sunxi_dw_hdmi.c
+++ b/drivers/video/sunxi/sunxi_dw_hdmi.c
@@ -358,11 +358,9 @@ static int sunxi_dw_hdmi_probe(struct udevice *dev)
 
 	sunxi_dw_hdmi_phy_init(&priv->hdmi);
 
-	ret = dw_hdmi_phy_wait_for_hpd(&priv->hdmi);
-	if (ret < 0) {
-		debug("hdmi can not get hpd signal\n");
-		return -1;
-	}
+	ret = dw_hdmi_detect_hpd(&priv->hdmi);
+	if (ret < 0)
+		return ret;
 
 	dw_hdmi_init(&priv->hdmi);
 
diff --git a/include/dw_hdmi.h b/include/dw_hdmi.h
index 17bdd2dbf9..ba2ce5ea7f 100644
--- a/include/dw_hdmi.h
+++ b/include/dw_hdmi.h
@@ -562,5 +562,6 @@ void dw_hdmi_phy_init(struct dw_hdmi *hdmi);
 int dw_hdmi_enable(struct dw_hdmi *hdmi, const struct display_timing *edid);
 int dw_hdmi_read_edid(struct dw_hdmi *hdmi, u8 *buf, int buf_size);
 void dw_hdmi_init(struct dw_hdmi *hdmi);
+int dw_hdmi_detect_hpd(struct dw_hdmi *hdmi);
 
 #endif