adv7604: Add DT support

Parse the device tree node to populate platform data.

Signed-off-by: Laurent Pinchart <[email protected]>
Acked-by: Hans Verkuil <[email protected]>

Author: pinchartl

Documentation/devicetree/bindings/media/i2c/adv7604.txt

@@ -0,0 +1,56 @@
+* Analog Devices ADV7604/11 video decoder with HDMI receiver
+
+The ADV7604 and ADV7611 are multiformat video decoders with an integrated HDMI
+receiver. The ADV7604 has four multiplexed HDMI inputs and one analog input,
+and the ADV7611 has one HDMI input and no analog input.
+
+Required Properties:
+
+  - compatible: Must contain one of the following
+    - "adi,adv7604" for the ADV7604
+    - "adi,adv7611" for the ADV7611
+
+  - reg: I2C slave address
+
+  - hpd-gpios: References to the GPIOs that control the HDMI hot-plug
+    detection pins, one per HDMI input. The active flag indicates the GPIO
+    level that enables hot-plug detection.
+
+Optional Properties:
+
+  - reset-gpios: Reference to the GPIO connected to the device's reset pin.
+
+  - adi,default-input: Index of the input to be configured as default. Valid
+    values are 0..5 for the ADV7604 and 0 for the ADV7611.
+
+  - adi,disable-power-down: Boolean property. When set forces the device to
+    ignore the power-down pin. The property is valid for the ADV7604 only as
+    the ADV7611 has no power-down pin.
+
+  - adi,disable-cable-reset: Boolean property. When set disables the HDMI
+    receiver automatic reset when the HDMI cable is unplugged.
+
+Example:
+
+	hdmi_receiver@4c {
+		compatible = "adi,adv7611";
+		reg = <0x4c>;
+
+		reset-gpios = <&ioexp 0 GPIO_ACTIVE_LOW>;
+		hpd-gpios = <&ioexp 2 GPIO_ACTIVE_HIGH>;
+
+		adi,default-input = <0>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+		};
+		port@1 {
+			reg = <1>;
+			hdmi_in: endpoint {
+				remote-endpoint = <&ccdc_in>;
+			};
+		};
+	};

drivers/media/i2c/adv7604.c

@@ -2663,13 +2663,71 @@ static const struct adv7604_chip_info adv7604_chip_info[] = {
 	},
 };
 
+static struct i2c_device_id adv7604_i2c_id[] = {
+	{ "adv7604", (kernel_ulong_t)&adv7604_chip_info[ADV7604] },
+	{ "adv7611", (kernel_ulong_t)&adv7604_chip_info[ADV7611] },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, adv7604_i2c_id);
+
+static struct of_device_id adv7604_of_id[] = {
+	{ .compatible = "adi,adv7604", .data = &adv7604_chip_info[ADV7604] },
+	{ .compatible = "adi,adv7611", .data = &adv7604_chip_info[ADV7611] },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, adv7604_of_id);
+
+static int adv7604_parse_dt(struct adv7604_state *state)
+{
+	struct device_node *np;
+	int ret;
+
+	np = state->i2c_clients[ADV7604_PAGE_IO]->dev.of_node;
+
+	state->pdata.disable_pwrdnb =
+		of_property_read_bool(np, "adi,disable-power-down");
+	state->pdata.disable_cable_det_rst =
+		of_property_read_bool(np, "adi,disable-cable-reset");
+
+	ret = of_property_read_u32(np, "adi,default-input",
+				   &state->pdata.default_input);
+	if (ret < 0)
+		state->pdata.default_input = -1;
+
+	/* Disable the interrupt for now as no DT-based board uses it. */
+	state->pdata.int1_config = ADV7604_INT1_CONFIG_DISABLED;
+
+	/* Use the default I2C addresses. */
+	state->pdata.i2c_addresses[ADV7604_PAGE_AVLINK] = 0x42;
+	state->pdata.i2c_addresses[ADV7604_PAGE_CEC] = 0x40;
+	state->pdata.i2c_addresses[ADV7604_PAGE_INFOFRAME] = 0x3e;
+	state->pdata.i2c_addresses[ADV7604_PAGE_ESDP] = 0x38;
+	state->pdata.i2c_addresses[ADV7604_PAGE_DPP] = 0x3c;
+	state->pdata.i2c_addresses[ADV7604_PAGE_AFE] = 0x26;
+	state->pdata.i2c_addresses[ADV7604_PAGE_REP] = 0x32;
+	state->pdata.i2c_addresses[ADV7604_PAGE_EDID] = 0x36;
+	state->pdata.i2c_addresses[ADV7604_PAGE_HDMI] = 0x34;
+	state->pdata.i2c_addresses[ADV7604_PAGE_TEST] = 0x30;
+	state->pdata.i2c_addresses[ADV7604_PAGE_CP] = 0x22;
+	state->pdata.i2c_addresses[ADV7604_PAGE_VDP] = 0x24;
+
+	/* HACK: Hardcode the remaining platform data fields. */
+	state->pdata.blank_data = 1;
+	state->pdata.op_656_range = 1;
+	state->pdata.alt_data_sat = 1;
+	state->pdata.insert_av_codes = 1;
+	state->pdata.op_format_mode_sel = ADV7604_OP_FORMAT_MODE0;
+	state->pdata.bus_order = ADV7604_BUS_ORDER_RGB;
+
+	return 0;
+}
+
 static int adv7604_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
 	static const struct v4l2_dv_timings cea640x480 =
 		V4L2_DV_BT_CEA_640X480P59_94;
 	struct adv7604_state *state;
-	struct adv7604_platform_data *pdata = client->dev.platform_data;
 	struct v4l2_ctrl_handler *hdl;
 	struct v4l2_subdev *sd;
 	unsigned int i;
@@ -2688,19 +2746,32 @@ static int adv7604_probe(struct i2c_client *client,
 		return -ENOMEM;
 	}
 
-	state->info = &adv7604_chip_info[id->driver_data];
 	state->i2c_clients[ADV7604_PAGE_IO] = client;
 
 	/* initialize variables */
 	state->restart_stdi_once = true;
 	state->selected_input = ~0;
 
-	/* platform data */
-	if (!pdata) {
+	if (IS_ENABLED(CONFIG_OF) && client->dev.of_node) {
+		const struct of_device_id *oid;
+
+		oid = of_match_node(adv7604_of_id, client->dev.of_node);
+		state->info = oid->data;
+
+		err = adv7604_parse_dt(state);
+		if (err < 0) {
+			v4l_err(client, "DT parsing error\n");
+			return err;
+		}
+	} else if (client->dev.platform_data) {
+		struct adv7604_platform_data *pdata = client->dev.platform_data;
+
+		state->info = (const struct adv7604_chip_info *)id->driver_data;
+		state->pdata = *pdata;
+	} else {
 		v4l_err(client, "No platform data!\n");
 		return -ENODEV;
 	}
-	state->pdata = *pdata;
 
 	/* Request GPIOs. */
 	for (i = 0; i < state->info->num_dv_ports; ++i) {
@@ -2799,7 +2870,7 @@ static int adv7604_probe(struct i2c_client *client,
 			continue;
 
 		state->i2c_clients[i] =
-			adv7604_dummy_client(sd, pdata->i2c_addresses[i],
+			adv7604_dummy_client(sd, state->pdata.i2c_addresses[i],
 					     0xf2 + i);
 		if (state->i2c_clients[i] == NULL) {
 			err = -ENOMEM;
@@ -2873,21 +2944,15 @@ static int adv7604_remove(struct i2c_client *client)
 
 /* ----------------------------------------------------------------------- */
 
-static struct i2c_device_id adv7604_id[] = {
-	{ "adv7604", ADV7604 },
-	{ "adv7611", ADV7611 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, adv7604_id);
-
 static struct i2c_driver adv7604_driver = {
 	.driver = {
 		.owner = THIS_MODULE,
 		.name = "adv7604",
+		.of_match_table = of_match_ptr(adv7604_of_id),
 	},
 	.probe = adv7604_probe,
 	.remove = adv7604_remove,
-	.id_table = adv7604_id,
+	.id_table = adv7604_i2c_id,
 };
 
 module_i2c_driver(adv7604_driver);