[media] adv7604: Add DT support

Parse the device tree node to populate platform data. Only the ADV7611
is currently support with DT.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

2 files changed, 123 insertions, 14 deletions

diff --git a/Documentation/devicetree/bindings/media/i2c/adv7604.txt b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
new file mode 100644
index 000000000000..2efb48f20fb6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
@@ -0,0 +1,57 @@
+* 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.
+
+These device tree bindings support the ADV7611 only at the moment.
+
+Required Properties:
+
+  - compatible: Must contain one of the following
+    - "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.
+
+The device node must contain one 'port' child node per device input and output
+port, in accordance with the video interface bindings defined in
+Documentation/devicetree/bindings/media/video-interfaces.txt. The port nodes
+are numbered as follows.
+
+  Port                  ADV7611
+------------------------------------------------------------
+  HDMI                  0
+  Digital output        1
+
+The digital output port node must contain at least one endpoint.
+
+Optional Properties:
+
+  - reset-gpios: Reference to the GPIO connected to the device's reset pin.
+
+Example:
+
+        hdmi_receiver@4c {
+                compatible = "adi,adv7611";
+                reg = <0x4c>;
+
+                reset-gpios = <&ioexp 0 GPIO_ACTIVE_LOW>;
+                hpd-gpios = <&ioexp 2 GPIO_ACTIVE_HIGH>;
+
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                        reg = <0>;
+                };
+                port@1 {
+                        reg = <1>;
+                        hdmi_in: endpoint {
+                                remote-endpoint = <&ccdc_in>;
+                        };
+                };
+        };
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 342d73d3989b..1323189a45fa 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -2663,13 +2663,58 @@ 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[] __maybe_unused = {
+        { .compatible = "adi,adv7611", .data = &adv7604_chip_info[ADV7611] },
+        { }
+};
+MODULE_DEVICE_TABLE(of, adv7604_of_id);
+
+static int adv7604_parse_dt(struct adv7604_state *state)
+{
+        /* 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;
+
+        /* Hardcode the remaining platform data fields. */
+        state->pdata.disable_pwrdnb = 0;
+        state->pdata.disable_cable_det_rst = 0;
+        state->pdata.default_input = -1;
+        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 +2733,32 @@ 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 +2857,7 @@ 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 +2931,15 @@ 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);