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: Dongcheng Yan dongcheng.yan@intel.com --- drivers/platform/x86/intel/int3472/common.h | 1 + drivers/platform/x86/intel/int3472/discrete.c | 6 ++++++ 2 files changed, 7 insertions(+)
diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h index 145dec66df64..db4cd3720e24 100644 --- a/drivers/platform/x86/intel/int3472/common.h +++ b/drivers/platform/x86/intel/int3472/common.h @@ -22,6 +22,7 @@ #define INT3472_GPIO_TYPE_POWER_ENABLE 0x0b #define INT3472_GPIO_TYPE_CLK_ENABLE 0x0c #define INT3472_GPIO_TYPE_PRIVACY_LED 0x0d +#define INT3472_GPIO_TYPE_HOTPLUG_DETECT 0x13
#define INT3472_PDEV_MAX_NAME_LEN 23 #define INT3472_MAX_SENSOR_GPIOS 3 diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c index 30ff8f3ea1f5..28d41b1b3809 100644 --- a/drivers/platform/x86/intel/int3472/discrete.c +++ b/drivers/platform/x86/intel/int3472/discrete.c @@ -186,6 +186,10 @@ static void int3472_get_con_id_and_polarity(struct acpi_device *adev, u8 *type, *con_id = "privacy-led"; *gpio_flags = GPIO_ACTIVE_HIGH; break; + case INT3472_GPIO_TYPE_HOTPLUG_DETECT: + *con_id = "hpd"; + *gpio_flags = GPIO_LOOKUP_FLAGS_DEFAULT; + break; case INT3472_GPIO_TYPE_POWER_ENABLE: *con_id = "power-enable"; *gpio_flags = GPIO_ACTIVE_HIGH; @@ -212,6 +216,7 @@ static void int3472_get_con_id_and_polarity(struct acpi_device *adev, u8 *type, * 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 @@ -281,6 +286,7 @@ 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";
base-commit: 01c6df60d5d4ae00cd5c1648818744838bba7763