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media: adv7604: Add support for i2c_new_secondary_device

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The ADV7604 has thirteen 256-byte maps that can be accessed via the main
I2C ports. Each map has it own I2C address and acts as a standard slave
device on the I2C bus.

Allow a device tree node to override the default addresses so that
address conflicts with other devices on the same bus may be resolved at
the board description level.

[Kieran: Re-adapted for mainline]

Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Jean-Michel Hautbois 2018-02-13 12:48:56 -05:00 committed by Mauro Carvalho Chehab
parent 9feb786876
commit be2068bf64
1 changed files with 40 additions and 22 deletions
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62
drivers/media/i2c/adv7604.c
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@ -2722,6 +2722,27 @@ static const struct v4l2_ctrl_config adv76xx_ctrl_free_run_color = {
/* ----------------------------------------------------------------------- */
struct adv76xx_register_map {
const char *name;
u8 default_addr;
};
static const struct adv76xx_register_map adv76xx_default_addresses[] = {
[ADV76XX_PAGE_IO] = { "main", 0x4c },
[ADV7604_PAGE_AVLINK] = { "avlink", 0x42 },
[ADV76XX_PAGE_CEC] = { "cec", 0x40 },
[ADV76XX_PAGE_INFOFRAME] = { "infoframe", 0x3e },
[ADV7604_PAGE_ESDP] = { "esdp", 0x38 },
[ADV7604_PAGE_DPP] = { "dpp", 0x3c },
[ADV76XX_PAGE_AFE] = { "afe", 0x26 },
[ADV76XX_PAGE_REP] = { "rep", 0x32 },
[ADV76XX_PAGE_EDID] = { "edid", 0x36 },
[ADV76XX_PAGE_HDMI] = { "hdmi", 0x34 },
[ADV76XX_PAGE_TEST] = { "test", 0x30 },
[ADV76XX_PAGE_CP] = { "cp", 0x22 },
[ADV7604_PAGE_VDP] = { "vdp", 0x24 },
};
static int adv76xx_core_init(struct v4l2_subdev *sd)
{
struct adv76xx_state *state = to_state(sd);
@ -2822,13 +2843,26 @@ static void adv76xx_unregister_clients(struct adv76xx_state *state)
}
static struct i2c_client *adv76xx_dummy_client(struct v4l2_subdev *sd,
u8 addr, u8 io_reg)
unsigned int page)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct adv76xx_state *state = to_state(sd);
struct adv76xx_platform_data *pdata = &state->pdata;
unsigned int io_reg = 0xf2 + page;
struct i2c_client *new_client;
if (addr)
io_write(sd, io_reg, addr << 1);
return i2c_new_dummy(client->adapter, io_read(sd, io_reg) >> 1);
if (pdata && pdata->i2c_addresses[page])
new_client = i2c_new_dummy(client->adapter,
pdata->i2c_addresses[page]);
else
new_client = i2c_new_secondary_device(client,
adv76xx_default_addresses[page].name,
adv76xx_default_addresses[page].default_addr);
if (new_client)
io_write(sd, io_reg, new_client->addr << 1);
return new_client;
}
static const struct adv76xx_reg_seq adv7604_recommended_settings_afe[] = {
@ -3103,20 +3137,6 @@ static int adv76xx_parse_dt(struct adv76xx_state *state)
/* Disable the interrupt for now as no DT-based board uses it. */
state->pdata.int1_config = ADV76XX_INT1_CONFIG_DISABLED;
/* Use the default I2C addresses. */
state->pdata.i2c_addresses[ADV7604_PAGE_AVLINK] = 0x42;
state->pdata.i2c_addresses[ADV76XX_PAGE_CEC] = 0x40;
state->pdata.i2c_addresses[ADV76XX_PAGE_INFOFRAME] = 0x3e;
state->pdata.i2c_addresses[ADV7604_PAGE_ESDP] = 0x38;
state->pdata.i2c_addresses[ADV7604_PAGE_DPP] = 0x3c;
state->pdata.i2c_addresses[ADV76XX_PAGE_AFE] = 0x26;
state->pdata.i2c_addresses[ADV76XX_PAGE_REP] = 0x32;
state->pdata.i2c_addresses[ADV76XX_PAGE_EDID] = 0x36;
state->pdata.i2c_addresses[ADV76XX_PAGE_HDMI] = 0x34;
state->pdata.i2c_addresses[ADV76XX_PAGE_TEST] = 0x30;
state->pdata.i2c_addresses[ADV76XX_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;
@ -3466,11 +3486,9 @@ static int adv76xx_probe(struct i2c_client *client,
if (!(BIT(i) & state->info->page_mask))
continue;
state->i2c_clients[i] =
adv76xx_dummy_client(sd, state->pdata.i2c_addresses[i],
0xf2 + i);
state->i2c_clients[i] = adv76xx_dummy_client(sd, i);
if (!state->i2c_clients[i]) {
err = -ENOMEM;
err = -EINVAL;
v4l2_err(sd, "failed to create i2c client %u\n", i);
goto err_i2c;
}