drm: bridge: adv7511: enable CEC support for ADV7535

Like the ADV7533, the ADV7535 has an offset for the CEC register map,
and it is the same value (ADV7533_REG_CEC_OFFSET = 0x70).

Rather than testing for numerous chip types in the offset calculations
throughout the driver, just compute it during driver probe and put it in
the private adv7511 data structure.
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220423120854.1503163-2-alvin@pqrs.dk

drivers/gpu/drm/bridge/adv7511/adv7511.h

@@ -335,6 +335,7 @@ struct adv7511 {
 
 	struct regmap *regmap;
 	struct regmap *regmap_cec;
+	unsigned int reg_cec_offset;
 	enum drm_connector_status status;
 	bool powered;
 

drivers/gpu/drm/bridge/adv7511/adv7511_cec.c

@@ -21,8 +21,7 @@
 
 static void adv_cec_tx_raw_status(struct adv7511 *adv7511, u8 tx_raw_status)
 {
-	unsigned int offset = adv7511->type == ADV7533 ?
-					ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int offset = adv7511->reg_cec_offset;
 	unsigned int val;
 
 	if (regmap_read(adv7511->regmap_cec,
@@ -73,8 +72,7 @@ static void adv_cec_tx_raw_status(struct adv7511 *adv7511, u8 tx_raw_status)
 
 void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
 {
-	unsigned int offset = adv7511->type == ADV7533 ?
-					ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int offset = adv7511->reg_cec_offset;
 	const u32 irq_tx_mask = ADV7511_INT1_CEC_TX_READY |
 				ADV7511_INT1_CEC_TX_ARBIT_LOST |
 				ADV7511_INT1_CEC_TX_RETRY_TIMEOUT;
@@ -118,8 +116,7 @@ void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
 static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
 {
 	struct adv7511 *adv7511 = cec_get_drvdata(adap);
-	unsigned int offset = adv7511->type == ADV7533 ?
-					ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int offset = adv7511->reg_cec_offset;
 
 	if (adv7511->i2c_cec == NULL)
 		return -EIO;
@@ -165,8 +162,7 @@ static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
 static int adv7511_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
 {
 	struct adv7511 *adv7511 = cec_get_drvdata(adap);
-	unsigned int offset = adv7511->type == ADV7533 ?
-					ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int offset = adv7511->reg_cec_offset;
 	unsigned int i, free_idx = ADV7511_MAX_ADDRS;
 
 	if (!adv7511->cec_enabled_adap)
@@ -235,8 +231,7 @@ static int adv7511_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
 				     u32 signal_free_time, struct cec_msg *msg)
 {
 	struct adv7511 *adv7511 = cec_get_drvdata(adap);
-	unsigned int offset = adv7511->type == ADV7533 ?
-					ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int offset = adv7511->reg_cec_offset;
 	u8 len = msg->len;
 	unsigned int i;
 
@@ -289,8 +284,7 @@ static int adv7511_cec_parse_dt(struct device *dev, struct adv7511 *adv7511)
 
 int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
 {
-	unsigned int offset = adv7511->type == ADV7533 ?
-						ADV7533_REG_CEC_OFFSET : 0;
+	unsigned int offset = adv7511->reg_cec_offset;
 	int ret = adv7511_cec_parse_dt(dev, adv7511);
 
 	if (ret)

drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

@@ -1027,8 +1027,7 @@ static bool adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
 	struct i2c_client *i2c = to_i2c_client(dev);
 	struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
 
-	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
-		reg -= ADV7533_REG_CEC_OFFSET;
+	reg -= adv7511->reg_cec_offset;
 
 	switch (reg) {
 	case ADV7511_REG_CEC_RX_FRAME_HDR:
@@ -1073,6 +1072,8 @@ static int adv7511_init_cec_regmap(struct adv7511 *adv)
 		ret = adv7533_patch_cec_registers(adv);
 		if (ret)
 			goto err;
+
+		adv->reg_cec_offset = ADV7533_REG_CEC_OFFSET;
 	}
 
 	return 0;