fb9ea90d58
Some Type-C multi-port adapters which do not support usb connection are advertising the multi-functionality in DP alt mode. If multi-functionality is preferred, the DP driver assumes the adapter supports usb connection and USB phy driver will program the PHY mode to DP+USB. In source mode, usb PD driver checks for the peer_usb_connection of the adapter. If it does not support usb then it will stop usb stack and update the PHY MODE to USB only mode from phy_suspend path. The result is, usb may program the combo PHY to usb only mode when DP is already connected. This is causing AUX read/write timeouts when DP is trying to access the phy registers. To fix this issue, a flag in SVID connect handler in usbpd driver to notify peer_usb_comm support to the DP driver. DP driver will read this flag and program the phy mode. Change-Id: I0164b239bf2832d480795d90f5e9fc221bcc12ba Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org>
100 řádky
2.7 KiB
C
100 řádky
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
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*/
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#ifndef _DP_HPD_H_
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#define _DP_HPD_H_
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#include <linux/types.h>
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#include "dp_parser.h"
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#include "dp_catalog.h"
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struct device;
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/**
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* enum dp_hpd_type - dp hpd type
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* @DP_HPD_USBPD: USB type-c based HPD
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* @DP_HPD_GPIO: GPIO based HPD
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* @DP_HPD_BUILTIN: Controller built-in HPD
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*/
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enum dp_hpd_type {
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DP_HPD_USBPD,
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DP_HPD_GPIO,
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DP_HPD_LPHW,
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DP_HPD_BUILTIN,
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};
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/**
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* struct dp_hpd_cb - callback functions provided by the client
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*
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* @configure: called when dp connection is ready.
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* @disconnect: notify the cable disconnect event.
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* @attention: notify any attention message event.
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*/
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struct dp_hpd_cb {
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int (*configure)(struct device *dev);
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int (*disconnect)(struct device *dev);
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int (*attention)(struct device *dev);
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};
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/**
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* struct dp_hpd - DisplayPort HPD status
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*
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* @type: type of HPD
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* @orientation: plug orientation configuration, USBPD type only.
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* @hpd_high: Hot Plug Detect signal is high.
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* @hpd_irq: Change in the status since last message
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* @alt_mode_cfg_done: bool to specify alt mode status
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* @multi_func: multi-function preferred, USBPD type only
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* @isr: event interrupt, BUILTIN and LPHW type only
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* @register_hpd: register hardware callback
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* @host_init: source or host side setup for hpd
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* @host_deinit: source or host side de-initializations
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* @simulate_connect: simulate disconnect or connect for debug mode
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* @simulate_attention: simulate attention messages for debug mode
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* @wakeup_phy: wakeup USBPD phy layer
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*/
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struct dp_hpd {
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enum dp_hpd_type type;
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u32 orientation;
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bool hpd_high;
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bool hpd_irq;
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bool alt_mode_cfg_done;
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bool multi_func;
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bool peer_usb_comm;
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void (*isr)(struct dp_hpd *dp_hpd);
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int (*register_hpd)(struct dp_hpd *dp_hpd);
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void (*host_init)(struct dp_hpd *hpd, struct dp_catalog_hpd *catalog);
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void (*host_deinit)(struct dp_hpd *hpd, struct dp_catalog_hpd *catalog);
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int (*simulate_connect)(struct dp_hpd *dp_hpd, bool hpd);
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int (*simulate_attention)(struct dp_hpd *dp_hpd, int vdo);
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void (*wakeup_phy)(struct dp_hpd *dp_hpd, bool wakeup);
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};
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/**
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* dp_hpd_get() - configure and get the DisplayPlot HPD module data
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*
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* @dev: device instance of the caller
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* @parser: DP parser
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* @cb: callback function for HPD response
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* return: pointer to allocated hpd module data
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*
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* This function sets up the hpd module
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*/
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struct dp_hpd *dp_hpd_get(struct device *dev, struct dp_parser *parser,
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struct dp_catalog_hpd *catalog, struct dp_hpd_cb *cb);
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/**
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* dp_hpd_put()
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*
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* Cleans up dp_hpd instance
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*
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* @dp_hpd: instance of dp_hpd
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*/
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void dp_hpd_put(struct dp_hpd *dp_hpd);
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#endif /* _DP_HPD_H_ */
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