[PATCH 3/4] drm/msm: expose edid to hdmi cec adapter

[Arnaud Vrac]

When edid has been read after hpd, pass it to the cec adapter so that it
can extract the physical address of the device on the cec bus.
Invalidate the physical address when hpd is low.

Signed-off-by: Arnaud Vrac <avrac at freebox.fr>
---
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c |  2 ++
 drivers/gpu/drm/msm/hdmi/hdmi_hpd.c    | 17 +++++++++++++----
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index 9b1391d27ed39..efc3bd4908e83 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -7,6 +7,7 @@
 #include <linux/delay.h>
 #include <drm/drm_bridge_connector.h>
 #include <drm/drm_edid.h>
+#include <media/cec.h>
 
 #include "msm_kms.h"
 #include "hdmi.h"
@@ -256,6 +257,7 @@ static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge *bridge,
 	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
 
 	edid = drm_get_edid(connector, hdmi->i2c);
+	cec_s_phys_addr_from_edid(hdmi->cec_adap, edid);
 
 	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
 
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
index bfa827b479897..cb3eb2625ff63 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
@@ -7,6 +7,7 @@
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/pinctrl/consumer.h>
+#include <media/cec.h>
 
 #include "msm_kms.h"
 #include "hdmi.h"
@@ -230,15 +231,17 @@ enum drm_connector_status msm_hdmi_bridge_detect(
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
 	struct hdmi *hdmi = hdmi_bridge->hdmi;
-	enum drm_connector_status stat_gpio, stat_reg;
+	enum drm_connector_status status, stat_gpio, stat_reg;
 	int retry = 20;
 
 	/*
 	 * some platforms may not have hpd gpio. Rely only on the status
 	 * provided by REG_HDMI_HPD_INT_STATUS in this case.
 	 */
-	if (!hdmi->hpd_gpiod)
-		return detect_reg(hdmi);
+	if (!hdmi->hpd_gpiod) {
+		status = detect_reg(hdmi);
+		goto out;
+	}
 
 	do {
 		stat_gpio = detect_gpio(hdmi);
@@ -259,5 +262,11 @@ enum drm_connector_status msm_hdmi_bridge_detect(
 		DBG("hpd gpio tells us: %d", stat_gpio);
 	}
 
-	return stat_gpio;
+	status = stat_gpio;
+
+out:
+	if (!status)
+		cec_phys_addr_invalidate(hdmi->cec_adap);
+
+	return status;
 }

-- 
2.40.0