diff mbox series

[v3,1/2] platform/x86: int3472: add hpd pin support

Message ID 20250425104331.3165876-1-dongcheng.yan@intel.com
State New
Headers show
Series [v3,1/2] platform/x86: int3472: add hpd pin support | expand

Commit Message

Dongcheng Yan April 25, 2025, 10:43 a.m. UTC 
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(+)


base-commit: 4d1e8c8f11c611db5828e4bae7292bc295eea8ef
diff mbox series

Patch

diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h
index 51b818e62a25..4593d567caf4 100644
--- a/drivers/platform/x86/intel/int3472/common.h
+++ b/drivers/platform/x86/intel/int3472/common.h
@@ -23,6 +23,7 @@ 
 #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
diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
index 394975f55d64..efa3bc7af193 100644
--- a/drivers/platform/x86/intel/int3472/discrete.c
+++ b/drivers/platform/x86/intel/int3472/discrete.c
@@ -191,6 +191,10 @@  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;
@@ -221,6 +225,7 @@  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
@@ -290,6 +295,7 @@  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";