f3b2c5f89c
We add support for Trusted UI (TUI) transitions and address the
following use cases:
1. Display was active before TUI start
- Power off on TUI start, power off on TUI stop
- Register access not allowed after TUI start (skip all
events except disconnect)
2. Hotplug while TUI is active
- Connect: skip sending connect uevent
- Disconnect: send disconnect uevent and skip any controller
programming
3. TUI start while processing HPD High
- Complete all connect work (and therefore any register access)
then send connect uevent
4. Audio
- Disable audio at TUI start and skip audio programming if TUI
is active
Change-Id: I553e5fa9f3b8265dd0410bf2d616a9accf90605f
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
75 line
1.7 KiB
C
75 line
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
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*/
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#ifndef _DP_AUDIO_H_
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#define _DP_AUDIO_H_
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#include <linux/platform_device.h>
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#include "dp_panel.h"
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#include "dp_catalog.h"
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/**
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* struct dp_audio
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* @lane_count: number of lanes configured in current session
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* @bw_code: link rate's bandwidth code for current session
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* @tui_active: set to true if TUI is active in the system
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*/
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struct dp_audio {
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u32 lane_count;
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u32 bw_code;
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bool tui_active;
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/**
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* on()
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*
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* Notifies user mode clients that DP is powered on, and that audio
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* playback can start on the external display.
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*
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* @dp_audio: an instance of struct dp_audio.
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*
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* Returns the error code in case of failure, 0 in success case.
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*/
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int (*on)(struct dp_audio *dp_audio);
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/**
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* off()
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*
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* Notifies user mode clients that DP is shutting down, and audio
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* playback should be stopped on the external display.
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*
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* @dp_audio: an instance of struct dp_audio.
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*
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* Returns the error code in case of failure, 0 in success case.
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*/
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int (*off)(struct dp_audio *dp_audio);
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};
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/**
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* dp_audio_get()
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*
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* Creates and instance of dp audio.
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*
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* @pdev: caller's platform device instance.
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* @panel: an instance of dp_panel module.
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* @catalog: an instance of dp_catalog_audio module.
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*
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* Returns the error code in case of failure, otherwize
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* an instance of newly created dp_module.
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*/
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struct dp_audio *dp_audio_get(struct platform_device *pdev,
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struct dp_panel *panel,
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struct dp_catalog_audio *catalog);
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/**
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* dp_audio_put()
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*
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* Cleans the dp_audio instance.
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*
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* @dp_audio: an instance of dp_audio.
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*/
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void dp_audio_put(struct dp_audio *dp_audio);
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#endif /* _DP_AUDIO_H_ */
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