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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Nissa shared HDMI sub-board functionality */
#ifndef __CROS_EC_NISSA_NISSA_HDMI_H__
#define __CROS_EC_NISSA_NISSA_HDMI_H__
#include "common.h"
/** True if the board supports an HDMI sub-board. */
#define NISSA_BOARD_HAS_HDMI_SUPPORT DT_NODE_EXISTS(DT_NODELABEL(gpio_hdmi_sel))
/**
* Configure the GPIO that controls core rails on the HDMI sub-board.
*
* This is the gpio_en_rails_odl pin, which is configured as active-low
* open-drain output to enable power to the HDMI sub-board (typically when the
* AP is in S5 or above).
*
* This function must be called if the pin is connected to the HDMI board and
* power is not enabled by default.
*/
void nissa_configure_hdmi_rails(void);
/**
* Configure the GPIO that controls the HDMI VCC pin on the HDMI sub-board.
*
* This is the gpio_hdmi_en_odl pin, which is configured as active-low
* open-drain output to enable the VCC pin on the HDMI connector (typically when
* the AP is on, in S0 or S0ix).
*
* This function must be called if the pin is connected to the HDMI board and
* VCC is not enabled by default.
*/
void nissa_configure_hdmi_vcc(void);
/**
* Configure the GPIOS controlling HDMI sub-board power (core rails and VCC).
*
* This function is called from shared code while configuring sub-boards, and
* used if an HDMI sub-board is present. The default implementation enables the
* core rails control pin (nissa_configure_hdmi_rails) but not VCC
* (nissa_configure_hdmi_vcc), assuming that the pin for VCC is not connected
* connected on most boards (and that VCC will be turned on whenever the core
* rails are turned on).
*
* A board should override this function if it needs to enable more IOs for
* HDMI, or if some pins need to be conditionally enabled.
*/
__override_proto void nissa_configure_hdmi_power_gpios(void);
#endif /* __CROS_EC_NISSA_NISSA_HDMI_H__ */
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