3 files changed, 39 insertions, 10 deletions

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
index 39c9ece373..ec0b7f3d88 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
@@ -356,6 +356,7 @@ struct adv7511 {
 	enum drm_connector_status status;
 	bool powered;
 
+	struct drm_bridge *next_bridge;
 	struct drm_display_mode curr_mode;
 
 	unsigned int f_tmds;
@@ -400,7 +401,7 @@ struct adv7511 {
 
 #ifdef CONFIG_DRM_I2C_ADV7511_CEC
 int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511);
-void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1);
+int adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1);
 #else
 static inline int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
 {
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
index 44451a9658..2e9c88a2b5 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
@@ -119,7 +119,7 @@ static void adv7511_cec_rx(struct adv7511 *adv7511, int rx_buf)
 	cec_received_msg(adv7511->cec_adap, &msg);
 }
 
-void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
+int adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
 {
 	unsigned int offset = adv7511->info->reg_cec_offset;
 	const u32 irq_tx_mask = ADV7511_INT1_CEC_TX_READY |
@@ -131,16 +131,19 @@ void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
 	unsigned int rx_status;
 	int rx_order[3] = { -1, -1, -1 };
 	int i;
+	int irq_status = IRQ_NONE;
 
-	if (irq1 & irq_tx_mask)
+	if (irq1 & irq_tx_mask) {
 		adv_cec_tx_raw_status(adv7511, irq1);
+		irq_status = IRQ_HANDLED;
+	}
 
 	if (!(irq1 & irq_rx_mask))
-		return;
+		return irq_status;
 
 	if (regmap_read(adv7511->regmap_cec,
 			ADV7511_REG_CEC_RX_STATUS + offset, &rx_status))
-		return;
+		return irq_status;
 
 	/*
 	 * ADV7511_REG_CEC_RX_STATUS[5:0] contains the reception order of RX
@@ -172,6 +175,8 @@ void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
 
 		adv7511_cec_rx(adv7511, rx_buf);
 	}
+
+	return IRQ_HANDLED;
 }
 
 static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index b5518ff971..c8d2c4a157 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -17,6 +17,7 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_edid.h>
+#include <drm/drm_of.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 
@@ -468,6 +469,8 @@ static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 {
 	unsigned int irq0, irq1;
 	int ret;
+	int cec_status = IRQ_NONE;
+	int irq_status = IRQ_NONE;
 
 	ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
 	if (ret < 0)
@@ -480,21 +483,28 @@ static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 	regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
 	regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 
-	if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
+	if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder) {
 		schedule_work(&adv7511->hpd_work);
+		irq_status = IRQ_HANDLED;
+	}
 
 	if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
 		adv7511->edid_read = true;
 
 		if (adv7511->i2c_main->irq)
 			wake_up_all(&adv7511->wq);
+		irq_status = IRQ_HANDLED;
 	}
 
 #ifdef CONFIG_DRM_I2C_ADV7511_CEC
-	adv7511_cec_irq_process(adv7511, irq1);
+	cec_status = adv7511_cec_irq_process(adv7511, irq1);
 #endif
 
-	return 0;
+	/* If there is no IRQ to handle, exit indicating no IRQ data */
+	if (irq_status == IRQ_HANDLED || cec_status == IRQ_HANDLED)
+		return IRQ_HANDLED;
+
+	return IRQ_NONE;
 }
 
 static irqreturn_t adv7511_irq_handler(int irq, void *devid)
@@ -503,7 +513,7 @@ static irqreturn_t adv7511_irq_handler(int irq, void *devid)
 	int ret;
 
 	ret = adv7511_irq_process(adv7511, true);
-	return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
+	return ret < 0 ? IRQ_NONE : ret;
 }
 
 /* -----------------------------------------------------------------------------
@@ -946,6 +956,13 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge,
 	struct adv7511 *adv = bridge_to_adv7511(bridge);
 	int ret = 0;
 
+	if (adv->next_bridge) {
+		ret = drm_bridge_attach(bridge->encoder, adv->next_bridge, bridge,
+					flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+		if (ret)
+			return ret;
+	}
+
 	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
 		ret = adv7511_connector_init(adv);
 		if (ret < 0)
@@ -1216,6 +1233,11 @@ static int adv7511_probe(struct i2c_client *i2c)
 
 	memset(&link_config, 0, sizeof(link_config));
 
+	ret = drm_of_find_panel_or_bridge(dev->of_node, 1, -1, NULL,
+					  &adv7511->next_bridge);
+	if (ret && ret != -ENODEV)
+		return ret;
+
 	if (adv7511->info->link_config)
 		ret = adv7511_parse_dt(dev->of_node, &link_config);
 	else
@@ -1318,7 +1340,8 @@ static int adv7511_probe(struct i2c_client *i2c)
 
 		ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
 						adv7511_irq_handler,
-						IRQF_ONESHOT, dev_name(dev),
+						IRQF_ONESHOT | IRQF_SHARED,
+						dev_name(dev),
 						adv7511);
 		if (ret)
 			goto err_unregister_audio;