1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright (C) 2016 Intel Corporation 4 * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com> 5 * Ramesh Babu K V <ramesh.babu@intel.com> 6 * Vaibhav Agarwal <vaibhav.agarwal@intel.com> 7 * Jerome Anand <jerome.anand@intel.com> 8 */ 9 10 #ifndef _INTEL_HDMI_AUDIO_H_ 11 #define _INTEL_HDMI_AUDIO_H_ 12 13 #include "intel_hdmi_lpe_audio.h" 14 15 #define MAX_PB_STREAMS 1 16 #define MAX_CAP_STREAMS 0 17 #define BYTES_PER_WORD 0x4 18 #define INTEL_HAD "HdmiLpeAudio" 19 20 /* 21 * CEA speaker placement: 22 * 23 * FL FLC FC FRC FR 24 * 25 * LFE 26 * 27 * RL RLC RC RRC RR 28 * 29 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M 30 * corresponds to CEA RL/RR; The SMPTE channel _assignment_ C/LFE is 31 * swapped to CEA LFE/FC. 32 */ 33 enum cea_speaker_placement { 34 FL = (1 << 0), /* Front Left */ 35 FC = (1 << 1), /* Front Center */ 36 FR = (1 << 2), /* Front Right */ 37 FLC = (1 << 3), /* Front Left Center */ 38 FRC = (1 << 4), /* Front Right Center */ 39 RL = (1 << 5), /* Rear Left */ 40 RC = (1 << 6), /* Rear Center */ 41 RR = (1 << 7), /* Rear Right */ 42 RLC = (1 << 8), /* Rear Left Center */ 43 RRC = (1 << 9), /* Rear Right Center */ 44 LFE = (1 << 10), /* Low Frequency Effect */ 45 }; 46 47 struct cea_channel_speaker_allocation { 48 int ca_index; 49 int speakers[8]; 50 51 /* derived values, just for convenience */ 52 int channels; 53 int spk_mask; 54 }; 55 56 struct channel_map_table { 57 unsigned char map; /* ALSA API channel map position */ 58 unsigned char cea_slot; /* CEA slot value */ 59 int spk_mask; /* speaker position bit mask */ 60 }; 61 62 struct pcm_stream_info { 63 struct snd_pcm_substream *substream; 64 int substream_refcount; 65 }; 66 67 /* 68 * struct snd_intelhad - intelhad driver structure 69 * 70 * @card: ptr to hold card details 71 * @connected: the monitor connection status 72 * @stream_info: stream information 73 * @eld: holds ELD info 74 * @curr_buf: pointer to hold current active ring buf 75 * @valid_buf_cnt: ring buffer count for stream 76 * @had_spinlock: driver lock 77 * @aes_bits: IEC958 status bits 78 * @buff_done: id of current buffer done intr 79 * @dev: platform device handle 80 * @chmap: holds channel map info 81 */ 82 struct snd_intelhad { 83 struct snd_intelhad_card *card_ctx; 84 bool connected; 85 struct pcm_stream_info stream_info; 86 unsigned char eld[HDMI_MAX_ELD_BYTES]; 87 bool dp_output; 88 unsigned int aes_bits; 89 spinlock_t had_spinlock; 90 struct device *dev; 91 struct snd_pcm_chmap *chmap; 92 int tmds_clock_speed; 93 int link_rate; 94 int port; /* fixed */ 95 int pipe; /* can change dynamically */ 96 97 /* ring buffer (BD) position index */ 98 unsigned int bd_head; 99 /* PCM buffer position indices */ 100 unsigned int pcmbuf_head; /* being processed */ 101 unsigned int pcmbuf_filled; /* to be filled */ 102 103 unsigned int num_bds; /* number of BDs */ 104 unsigned int period_bytes; /* PCM period size in bytes */ 105 106 /* internal stuff */ 107 union aud_cfg aud_config; /* AUD_CONFIG reg value cache */ 108 struct work_struct hdmi_audio_wq; 109 struct mutex mutex; /* for protecting chmap and eld */ 110 struct snd_jack *jack; 111 }; 112 113 struct snd_intelhad_card { 114 struct snd_card *card; 115 struct device *dev; 116 117 /* internal stuff */ 118 int irq; 119 void __iomem *mmio_start; 120 int num_pipes; 121 int num_ports; 122 struct snd_intelhad pcm_ctx[3]; /* one for each port */ 123 }; 124 125 #endif /* _INTEL_HDMI_AUDIO_ */ 126