[media] adv7604: Add support for hardware reset (f5591da9) · Commits · 戴 / test

drivers/media/i2c/adv7604.c

+20 −0

Original line number	Diff line number	Diff line
		@@ -164,6 +164,7 @@ struct adv76xx_state {
		struct adv76xx_platform_data pdata;

		struct gpio_desc *hpd_gpio[4];
		struct gpio_desc *reset_gpio;

		struct v4l2_subdev sd;
		struct media_pad pads[ADV76XX_PAD_MAX];
		@@ -3018,6 +3019,19 @@ static int configure_regmaps(struct adv76xx_state *state)
		return 0;
		}

		static void adv76xx_reset(struct adv76xx_state *state)
		{
		if (state->reset_gpio) {
		/* ADV76XX can be reset by a low reset pulse of minimum 5 ms. */
		gpiod_set_value_cansleep(state->reset_gpio, 0);
		usleep_range(5000, 10000);
		gpiod_set_value_cansleep(state->reset_gpio, 1);
		/* It is recommended to wait 5 ms after the low pulse before */
		/* an I2C write is performed to the ADV76XX. */
		usleep_range(5000, 10000);
		}
		}

		static int adv76xx_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		@@ -3081,6 +3095,12 @@ static int adv76xx_probe(struct i2c_client *client,
		if (state->hpd_gpio[i])
		v4l_info(client, "Handling HPD %u GPIO\n", i);
		}
		state->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
		GPIOD_OUT_HIGH);
		if (IS_ERR(state->reset_gpio))
		return PTR_ERR(state->reset_gpio);

		adv76xx_reset(state);

		state->timings = cea640x480;
		state->format = adv76xx_format_info(state, MEDIA_BUS_FMT_YUYV8_2X8);