1bd7966d14
Certain sinks (such as DVI monitors) do not support audio which can be identified using the sink's EDID. For such sinks, ensure that audio is not routed over the external display. Change-Id: I1c1a634bf096392094b5fd868a87385764657e6b CRs-Fixed: 1093442 Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
160 lines
4.8 KiB
C
160 lines
4.8 KiB
C
/* include/linux/msm_ext_display.h
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*
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* Copyright (c) 2014-2016 The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _MSM_EXT_DISPLAY_H_
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#define _MSM_EXT_DISPLAY_H_
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#define AUDIO_ACK_SET_ENABLE BIT(5)
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#define AUDIO_ACK_ENABLE BIT(4)
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#define AUDIO_ACK_CONNECT BIT(0)
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/**
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* Flags to be used with the HPD operation of the external display
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* interface:
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* MSM_EXT_DISP_HPD_NO_AUDIO: audio will not be routed to external display
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* MSM_EXT_DISP_HPD_NO_VIDEO: video will not be routed to external display
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*/
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#define MSM_EXT_DISP_HPD_NO_AUDIO BIT(0)
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#define MSM_EXT_DISP_HPD_NO_VIDEO BIT(1)
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/**
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* struct ext_disp_cable_notify - cable notify handler structure
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* @link: a link for the linked list
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* @status: current status of HDMI/DP cable connection
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* @hpd_notify: callback function to provide cable status
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*/
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struct ext_disp_cable_notify {
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struct list_head link;
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int status;
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void (*hpd_notify)(struct ext_disp_cable_notify *h);
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};
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struct msm_ext_disp_audio_edid_blk {
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u8 *audio_data_blk;
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unsigned int audio_data_blk_size; /* in bytes */
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u8 *spk_alloc_data_blk;
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unsigned int spk_alloc_data_blk_size; /* in bytes */
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};
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struct msm_ext_disp_audio_setup_params {
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u32 sample_rate_hz;
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u32 num_of_channels;
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u32 channel_allocation;
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u32 level_shift;
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bool down_mix;
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u32 sample_present;
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};
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/**
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* External Display identifier for use to determine which interface
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* the audio driver is interacting with.
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*/
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enum msm_ext_disp_type {
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EXT_DISPLAY_TYPE_HDMI,
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EXT_DISPLAY_TYPE_DP,
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EXT_DISPLAY_TYPE_MAX
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};
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/**
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* External Display cable state used by display interface to indicate
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* connect/disconnect of interface.
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*/
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enum msm_ext_disp_cable_state {
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EXT_DISPLAY_CABLE_DISCONNECT,
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EXT_DISPLAY_CABLE_CONNECT,
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EXT_DISPLAY_CABLE_STATE_MAX
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};
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/**
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* External Display power state used by display interface to indicate
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* power on/off of the interface.
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*/
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enum msm_ext_disp_power_state {
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EXT_DISPLAY_POWER_OFF,
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EXT_DISPLAY_POWER_ON,
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EXT_DISPLAY_POWER_MAX
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};
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/**
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* struct msm_ext_disp_intf_ops - operations exposed to display interface
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* @hpd: updates external display interface state
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* @notify: updates audio framework with interface state
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*/
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struct msm_ext_disp_intf_ops {
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int (*hpd)(struct platform_device *pdev,
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enum msm_ext_disp_type type,
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enum msm_ext_disp_cable_state state,
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u32 flags);
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int (*notify)(struct platform_device *pdev,
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enum msm_ext_disp_cable_state state);
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int (*ack)(struct platform_device *pdev,
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u32 ack);
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};
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/**
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* struct msm_ext_disp_audio_codec_ops - operations exposed to audio codec
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* @audio_info_setup: configure audio on interface
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* @get_audio_edid_blk: retrieve audio edid block
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* @cable_status: cable connected/disconnected
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* @get_intf_id: id of connected interface
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*/
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struct msm_ext_disp_audio_codec_ops {
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int (*audio_info_setup)(struct platform_device *pdev,
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struct msm_ext_disp_audio_setup_params *params);
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int (*get_audio_edid_blk)(struct platform_device *pdev,
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struct msm_ext_disp_audio_edid_blk *blk);
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int (*cable_status)(struct platform_device *pdev, u32 vote);
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int (*get_intf_id)(struct platform_device *pdev);
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void (*teardown_done)(struct platform_device *pdev);
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};
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/*
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* struct msm_ext_disp_init_data - data needed to register the display interface
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* @disp: external display type
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* @intf_ops: external display interface operations
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* @codec_ops: audio codec operations
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*/
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struct msm_ext_disp_init_data {
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enum msm_ext_disp_type type;
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struct kobject *kobj;
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struct msm_ext_disp_intf_ops intf_ops;
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struct msm_ext_disp_audio_codec_ops codec_ops;
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struct platform_device *pdev;
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};
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/*
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* msm_ext_disp_register_audio_codec() - audio codec registration
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* @pdev: platform device pointer
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* @codec_ops: audio codec operations
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*/
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int msm_ext_disp_register_audio_codec(struct platform_device *pdev,
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struct msm_ext_disp_audio_codec_ops *ops);
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/*
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* msm_hdmi_register_audio_codec() - wrapper for hdmi audio codec registration
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* @pdev: platform device pointer
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* @codec_ops: audio codec operations
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*/
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int msm_hdmi_register_audio_codec(struct platform_device *pdev,
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struct msm_ext_disp_audio_codec_ops *ops);
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/*
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* msm_ext_disp_register_intf() - display interface registration
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* @init_data: data needed to register the display interface
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*/
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int msm_ext_disp_register_intf(struct platform_device *pdev,
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struct msm_ext_disp_init_data *init_data);
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#endif /*_MSM_EXT_DISPLAY_H_*/
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