drm/vc4: hdmi: Pass vc4_hdmi to CEC code

Our CEC code also retrieves the associated vc4_hdmi by setting the
vc4_dev pointer as its private data, and then dereferences its vc4_hdmi
pointer.

In order to eventually get rid of that pointer, we can simply pass the
vc4_hdmi pointer directly.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/cb575cb9e13018bce131b8535e5b572dc1027877.1599120059.git-series.maxime@cerno.tech

drivers/gpu/drm/vc4/vc4_hdmi.c

@@ -1032,8 +1032,7 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
 #ifdef CONFIG_DRM_VC4_HDMI_CEC
 static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
 {
-	struct vc4_dev *vc4 = priv;
-	struct vc4_hdmi *vc4_hdmi = vc4->hdmi;
+	struct vc4_hdmi *vc4_hdmi = priv;
 
 	if (vc4_hdmi->cec_irq_was_rx) {
 		if (vc4_hdmi->cec_rx_msg.len)
@@ -1053,9 +1052,8 @@ static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
 	return IRQ_HANDLED;
 }
 
-static void vc4_cec_read_msg(struct vc4_dev *vc4, u32 cntrl1)
+static void vc4_cec_read_msg(struct vc4_hdmi *vc4_hdmi, u32 cntrl1)
 {
-	struct vc4_hdmi *vc4_hdmi = vc4->hdmi;
 	struct cec_msg *msg = &vc4_hdmi->cec_rx_msg;
 	unsigned int i;
 
@@ -1073,8 +1071,7 @@ static void vc4_cec_read_msg(struct vc4_dev *vc4, u32 cntrl1)
 
 static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
 {
-	struct vc4_dev *vc4 = priv;
-	struct vc4_hdmi *vc4_hdmi = vc4->hdmi;
+	struct vc4_hdmi *vc4_hdmi = priv;
 	u32 stat = HDMI_READ(VC4_HDMI_CPU_STATUS);
 	u32 cntrl1, cntrl5;
 
@@ -1085,7 +1082,7 @@ static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
 	cntrl5 = HDMI_READ(VC4_HDMI_CEC_CNTRL_5);
 	vc4_hdmi->cec_irq_was_rx = cntrl5 & VC4_HDMI_CEC_RX_CEC_INT;
 	if (vc4_hdmi->cec_irq_was_rx) {
-		vc4_cec_read_msg(vc4, cntrl1);
+		vc4_cec_read_msg(vc4_hdmi, cntrl1);
 		cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
 		HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, cntrl1);
 		cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
@@ -1101,8 +1098,7 @@ static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
 
 static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
 {
-	struct vc4_dev *vc4 = cec_get_drvdata(adap);
-	struct vc4_hdmi *vc4_hdmi = vc4->hdmi;
+	struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
 	/* clock period in microseconds */
 	const u32 usecs = 1000000 / CEC_CLOCK_FREQ;
 	u32 val = HDMI_READ(VC4_HDMI_CEC_CNTRL_5);
@@ -1145,8 +1141,7 @@ static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
 
 static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
 {
-	struct vc4_dev *vc4 = cec_get_drvdata(adap);
-	struct vc4_hdmi *vc4_hdmi = vc4->hdmi;
+	struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
 
 	HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1,
 		   (HDMI_READ(VC4_HDMI_CEC_CNTRL_1) & ~VC4_HDMI_CEC_ADDR_MASK) |
@@ -1157,8 +1152,7 @@ static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
 static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
 				      u32 signal_free_time, struct cec_msg *msg)
 {
-	struct vc4_dev *vc4 = cec_get_drvdata(adap);
-	struct vc4_hdmi *vc4_hdmi = vc4->hdmi;
+	struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
 	u32 val;
 	unsigned int i;
 
@@ -1305,7 +1299,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 
 #ifdef CONFIG_DRM_VC4_HDMI_CEC
 	vc4_hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
-						  vc4, "vc4",
+						  vc4_hdmi, "vc4",
 						  CEC_CAP_DEFAULTS |
 						  CEC_CAP_CONNECTOR_INFO, 1);
 	ret = PTR_ERR_OR_ZERO(vc4_hdmi->cec_adap);
@@ -1329,7 +1323,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 	ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0),
 					vc4_cec_irq_handler,
 					vc4_cec_irq_handler_thread, 0,
-					"vc4 hdmi cec", vc4);
+					"vc4 hdmi cec", vc4_hdmi);
 	if (ret)
 		goto err_delete_cec_adap;
 	ret = cec_register_adapter(vc4_hdmi->cec_adap, dev);