[PATCH v3 3/7] drm/i2c: adv7511: Initial support for ADV7533

[Archit Taneja <architt@codeaurora.org>]

ADV7533 is a DSI to HDMI encoder chip. It is a derivative of ADV7511,
with additional blocks to translate input DSI data to parallel RGB
data. Besides the ADV7511 I2C register map, it has additional registers
that require to be configured to activate the DSI Rx block.

Use DT compatible strings to populate the ADV7533 type enum. Add minimal
register configurations belonging to the DSI/CEC register map.

Originally worked on by Lars-Peter Clausen <lars@metafoo.de>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/i2c/adv7511.c | 138 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 120 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index c00d11d..75be17c 100644
--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -10,6 +10,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
 
@@ -21,12 +22,18 @@
 
 #include "adv7511.h"
 
+enum adv7511_type {
+	ADV7511,
+	ADV7533,
+};
+
 struct adv7511 {
 	struct i2c_client *i2c_main;
 	struct i2c_client *i2c_edid;
+	struct i2c_client *i2c_cec;
 
 	struct regmap *regmap;
-	struct regmap *packet_memory_regmap;
+	struct regmap *regmap_cec;
 	enum drm_connector_status status;
 	bool powered;
 
@@ -48,6 +55,8 @@ struct adv7511 {
 	struct edid *edid;
 
 	struct gpio_desc *gpio_pd;
+
+	enum adv7511_type type;
 };
 
 /* ADI recommended values for proper operation. */
@@ -63,6 +72,22 @@ static const struct reg_sequence adv7511_fixed_registers[] = {
 	{ 0x55, 0x02 },
 };
 
+static const struct reg_sequence adv7533_fixed_registers[] = {
+	{ 0x16, 0x20 },
+	{ 0x9a, 0xe0 },
+	{ 0xba, 0x70 },
+	{ 0xde, 0x82 },
+	{ 0xe4, 0x40 },
+	{ 0xe5, 0x80 },
+};
+
+static const struct reg_sequence adv7533_cec_fixed_registers[] = {
+	{ 0x15, 0xd0 },
+	{ 0x17, 0xd0 },
+	{ 0x24, 0x20 },
+	{ 0x57, 0x11 },
+};
+
 /* -----------------------------------------------------------------------------
  * Register access
  */
@@ -156,6 +181,15 @@ static const struct regmap_config adv7511_regmap_config = {
 	.volatile_reg = adv7511_register_volatile,
 };
 
+static const struct regmap_config adv7533_cec_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = 0xff,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+
 /* -----------------------------------------------------------------------------
  * Hardware configuration
  */
@@ -356,6 +390,21 @@ static void adv7511_set_link_config(struct adv7511 *adv7511,
 	adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
 }
 
+static void adv7533_dsi_power_on(struct adv7511 *adv)
+{
+	/* set number of dsi lanes (hardcoded to 4 for now) */
+	regmap_write(adv->regmap_cec, 0x1c, 0x4 << 4);
+	/* disable internal timing generator */
+	regmap_write(adv->regmap_cec, 0x27, 0x0b);
+	/* enable hdmi */
+	regmap_write(adv->regmap_cec, 0x03, 0x89);
+	/* disable test mode */
+	regmap_write(adv->regmap_cec, 0x55, 0x00);
+
+	regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
+			      ARRAY_SIZE(adv7533_cec_fixed_registers));
+}
+
 static void adv7511_power_on(struct adv7511 *adv7511)
 {
 	adv7511->current_edid_segment = -1;
@@ -391,9 +440,18 @@ static void adv7511_power_on(struct adv7511 *adv7511)
 	 */
 	regcache_sync(adv7511->regmap);
 
+	if (adv7511->type == ADV7533)
+		adv7533_dsi_power_on(adv7511);
+
 	adv7511->powered = true;
 }
 
+static void adv7533_dsi_power_off(struct adv7511 *adv)
+{
+	/* disable hdmi */
+	regmap_write(adv->regmap_cec, 0x03, 0x0b);
+}
+
 static void adv7511_power_off(struct adv7511 *adv7511)
 {
 	/* TODO: setup additional power down modes */
@@ -402,6 +460,9 @@ static void adv7511_power_off(struct adv7511 *adv7511)
 			   ADV7511_POWER_POWER_DOWN);
 	regcache_mark_dirty(adv7511->regmap);
 
+	if (adv7511->type == ADV7533)
+		adv7533_dsi_power_off(adv7511);
+
 	adv7511->powered = false;
 }
 
@@ -871,8 +932,6 @@ static int adv7511_parse_dt(struct device_node *np,
 	const char *str;
 	int ret;
 
-	memset(config, 0, sizeof(*config));
-
 	of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
 	if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
 	    config->input_color_depth != 12)
@@ -972,9 +1031,18 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 	adv7511->powered = false;
 	adv7511->status = connector_status_disconnected;
 
-	ret = adv7511_parse_dt(dev->of_node, &link_config);
-	if (ret)
-		return ret;
+	if (dev->of_node)
+		adv7511->type = (enum adv7511_type) of_device_get_match_data(dev);
+	else
+		adv7511->type = id->driver_data;
+
+	memset(&link_config, 0, sizeof(link_config));
+
+	if (adv7511->type == ADV7511) {
+		ret = adv7511_parse_dt(dev->of_node, &link_config);
+		if (ret)
+			return ret;
+	}
 
 	/*
 	 * The power down GPIO is optional. If present, toggle it from active to
@@ -998,8 +1066,15 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 		return ret;
 	dev_dbg(dev, "Rev. %d\n", val);
 
-	ret = regmap_register_patch(adv7511->regmap, adv7511_fixed_registers,
-				    ARRAY_SIZE(adv7511_fixed_registers));
+	if (adv7511->type == ADV7511) {
+		ret = regmap_register_patch(adv7511->regmap,
+					adv7511_fixed_registers,
+					ARRAY_SIZE(adv7511_fixed_registers));
+	} else {
+		ret = regmap_register_patch(adv7511->regmap,
+					adv7533_fixed_registers,
+					ARRAY_SIZE(adv7533_fixed_registers));
+	}
 	if (ret)
 		return ret;
 
@@ -1014,6 +1089,27 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 	if (!adv7511->i2c_edid)
 		return -ENOMEM;
 
+	adv7511->i2c_cec = i2c_new_dummy(i2c->adapter, cec_i2c_addr >> 1);
+	if (!adv7511->i2c_cec) {
+		ret = -ENOMEM;
+		goto err_i2c_unregister_edid;
+	}
+
+	adv7511->regmap_cec = devm_regmap_init_i2c(adv7511->i2c_cec,
+					&adv7533_cec_regmap_config);
+	if (IS_ERR(adv7511->regmap_cec)) {
+		ret = PTR_ERR(adv7511->regmap_cec);
+		goto err_i2c_unregister_cec;
+	}
+
+	if (adv7511->type == ADV7533) {
+		ret = regmap_register_patch(adv7511->regmap_cec,
+				adv7533_cec_fixed_registers,
+				ARRAY_SIZE(adv7533_cec_fixed_registers));
+		if (ret)
+			goto err_i2c_unregister_cec;
+	}
+
 	if (i2c->irq) {
 		init_waitqueue_head(&adv7511->wq);
 
@@ -1022,7 +1118,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 						IRQF_ONESHOT, dev_name(dev),
 						adv7511);
 		if (ret)
-			goto err_i2c_unregister_device;
+			goto err_i2c_unregister_cec;
 	}
 
 	/* CEC is unused for now */
@@ -1033,7 +1129,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 
 	i2c_set_clientdata(i2c, adv7511);
 
-	adv7511_set_link_config(adv7511, &link_config);
+	if (adv7511->type == ADV7511)
+		adv7511_set_link_config(adv7511, &link_config);
 
 	adv7511->bridge.funcs = &adv7511_bridge_funcs;
 	adv7511->bridge.of_node = dev->of_node;
@@ -1041,12 +1138,14 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 	ret = drm_bridge_add(&adv7511->bridge);
 	if (ret) {
 		dev_err(dev, "failed to add adv7511 bridge\n");
-		goto err_i2c_unregister_device;
+		goto err_i2c_unregister_cec;
 	}
 
 	return 0;
 
-err_i2c_unregister_device:
+err_i2c_unregister_cec:
+	i2c_unregister_device(adv7511->i2c_cec);
+err_i2c_unregister_edid:
 	i2c_unregister_device(adv7511->i2c_edid);
 
 	return ret;
@@ -1058,6 +1157,7 @@ static int adv7511_remove(struct i2c_client *i2c)
 
 	drm_bridge_remove(&adv7511->bridge);
 
+	i2c_unregister_device(adv7511->i2c_cec);
 	i2c_unregister_device(adv7511->i2c_edid);
 
 	kfree(adv7511->edid);
@@ -1066,17 +1166,19 @@ static int adv7511_remove(struct i2c_client *i2c)
 }
 
 static const struct i2c_device_id adv7511_i2c_ids[] = {
-	{ "adv7511", 0 },
-	{ "adv7511w", 0 },
-	{ "adv7513", 0 },
+	{ "adv7511", ADV7511 },
+	{ "adv7511w", ADV7511 },
+	{ "adv7513", ADV7511 },
+	{ "adv7533", ADV7533 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
 
 static const struct of_device_id adv7511_of_ids[] = {
-	{ .compatible = "adi,adv7511", },
-	{ .compatible = "adi,adv7511w", },
-	{ .compatible = "adi,adv7513", },
+	{ .compatible = "adi,adv7511", .data = (void *)ADV7511 },
+	{ .compatible = "adi,adv7511w", .data = (void *)ADV7511 },
+	{ .compatible = "adi,adv7513", .data = (void *)ADV7511 },
+	{ .compatible = "adi,adv7533", .data = (void *)ADV7533 },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, adv7511_of_ids);
-- 
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