Commit a032fe30 authored by Dongcheng Yan's avatar Dongcheng Yan Committed by Hans Verkuil
Browse files

platform/x86: int3472: add hpd pin support 



Typically HDMI to MIPI CSI-2 bridges have a pin to signal image data is
being received. On the host side this is wired to a GPIO for polling or
interrupts. This includes the Lontium HDMI to MIPI CSI-2 bridges
lt6911uxe and lt6911uxc.

The GPIO "hpd" is used already by other HDMI to CSI-2 bridges, use it
here as well.

Signed-off-by: default avatarDongcheng Yan <dongcheng.yan@intel.com>
Reviewed-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Fixes: 20244cba ("media: i2c: change lt6911uxe irq_gpio name to "hpd"")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarHans Verkuil <hverkuil+cisco@kernel.org>
parent da3fa08a

drivers/platform/x86/intel/int3472/discrete.c

+6 −0
Original line number Diff line number Diff line
@@ -193,6 +193,10 @@ static void int3472_get_con_id_and_polarity(struct int3472_discrete_device *int3 
		*con_id = "privacy-led";

		*gpio_flags = GPIO_ACTIVE_HIGH;

		break;

	case INT3472_GPIO_TYPE_HOTPLUG_DETECT:

		*con_id = "hpd";

		*gpio_flags = GPIO_ACTIVE_HIGH;

		break;

	case INT3472_GPIO_TYPE_POWER_ENABLE:

		*con_id = "avdd";

		*gpio_flags = GPIO_ACTIVE_HIGH;
@@ -223,6 +227,7 @@ static void int3472_get_con_id_and_polarity(struct int3472_discrete_device *int3 
 * 0x0b Power enable

 * 0x0c Clock enable

 * 0x0d Privacy LED

 * 0x13 Hotplug detect

 *

 * There are some known platform specific quirks where that does not quite

 * hold up; for example where a pin with type 0x01 (Power down) is mapped to
@@ -292,6 +297,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, 
	switch (type) {

	case INT3472_GPIO_TYPE_RESET:

	case INT3472_GPIO_TYPE_POWERDOWN:

	case INT3472_GPIO_TYPE_HOTPLUG_DETECT:

		ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, con_id, gpio_flags);

		if (ret)

			err_msg = "Failed to map GPIO pin to sensor\n";

include/linux/platform_data/x86/int3472.h

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#define INT3472_GPIO_TYPE_CLK_ENABLE				0x0c

#define INT3472_GPIO_TYPE_PRIVACY_LED				0x0d

#define INT3472_GPIO_TYPE_HANDSHAKE				0x12

#define INT3472_GPIO_TYPE_HOTPLUG_DETECT			0x13



#define INT3472_PDEV_MAX_NAME_LEN				23

#define INT3472_MAX_SENSOR_GPIOS				3