1 /* 2 * Copyright (C) 2016 Intel Corporation 3 * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com> 4 * Ramesh Babu K V <ramesh.babu@intel.com> 5 * Vaibhav Agarwal <vaibhav.agarwal@intel.com> 6 * Jerome Anand <jerome.anand@intel.com> 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining 9 * a copy of this software and associated documentation files 10 * (the "Software"), to deal in the Software without restriction, 11 * including without limitation the rights to use, copy, modify, merge, 12 * publish, distribute, sublicense, and/or sell copies of the Software, 13 * and to permit persons to whom the Software is furnished to do so, 14 * subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the 17 * next paragraph) shall be included in all copies or substantial 18 * portions of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 27 * SOFTWARE. 28 */ 29 30 #ifndef _INTEL_HDMI_AUDIO_H_ 31 #define _INTEL_HDMI_AUDIO_H_ 32 33 #include "intel_hdmi_lpe_audio.h" 34 35 #define MAX_PB_STREAMS 1 36 #define MAX_CAP_STREAMS 0 37 #define BYTES_PER_WORD 0x4 38 #define INTEL_HAD "HdmiLpeAudio" 39 40 /* 41 * CEA speaker placement: 42 * 43 * FL FLC FC FRC FR 44 * 45 * LFE 46 * 47 * RL RLC RC RRC RR 48 * 49 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M 50 * corresponds to CEA RL/RR; The SMPTE channel _assignment_ C/LFE is 51 * swapped to CEA LFE/FC. 52 */ 53 enum cea_speaker_placement { 54 FL = (1 << 0), /* Front Left */ 55 FC = (1 << 1), /* Front Center */ 56 FR = (1 << 2), /* Front Right */ 57 FLC = (1 << 3), /* Front Left Center */ 58 FRC = (1 << 4), /* Front Right Center */ 59 RL = (1 << 5), /* Rear Left */ 60 RC = (1 << 6), /* Rear Center */ 61 RR = (1 << 7), /* Rear Right */ 62 RLC = (1 << 8), /* Rear Left Center */ 63 RRC = (1 << 9), /* Rear Right Center */ 64 LFE = (1 << 10), /* Low Frequency Effect */ 65 }; 66 67 struct cea_channel_speaker_allocation { 68 int ca_index; 69 int speakers[8]; 70 71 /* derived values, just for convenience */ 72 int channels; 73 int spk_mask; 74 }; 75 76 struct channel_map_table { 77 unsigned char map; /* ALSA API channel map position */ 78 unsigned char cea_slot; /* CEA slot value */ 79 int spk_mask; /* speaker position bit mask */ 80 }; 81 82 struct pcm_stream_info { 83 struct snd_pcm_substream *substream; 84 int substream_refcount; 85 }; 86 87 /* 88 * struct snd_intelhad - intelhad driver structure 89 * 90 * @card: ptr to hold card details 91 * @connected: the monitor connection status 92 * @stream_info: stream information 93 * @eld: holds ELD info 94 * @curr_buf: pointer to hold current active ring buf 95 * @valid_buf_cnt: ring buffer count for stream 96 * @had_spinlock: driver lock 97 * @aes_bits: IEC958 status bits 98 * @buff_done: id of current buffer done intr 99 * @dev: platoform device handle 100 * @chmap: holds channel map info 101 */ 102 struct snd_intelhad { 103 struct snd_intelhad_card *card_ctx; 104 bool connected; 105 struct pcm_stream_info stream_info; 106 unsigned char eld[HDMI_MAX_ELD_BYTES]; 107 bool dp_output; 108 unsigned int aes_bits; 109 spinlock_t had_spinlock; 110 struct device *dev; 111 struct snd_pcm_chmap *chmap; 112 int tmds_clock_speed; 113 int link_rate; 114 int port; /* fixed */ 115 int pipe; /* can change dynamically */ 116 117 /* ring buffer (BD) position index */ 118 unsigned int bd_head; 119 /* PCM buffer position indices */ 120 unsigned int pcmbuf_head; /* being processed */ 121 unsigned int pcmbuf_filled; /* to be filled */ 122 123 unsigned int num_bds; /* number of BDs */ 124 unsigned int period_bytes; /* PCM period size in bytes */ 125 126 /* internal stuff */ 127 union aud_cfg aud_config; /* AUD_CONFIG reg value cache */ 128 struct work_struct hdmi_audio_wq; 129 struct mutex mutex; /* for protecting chmap and eld */ 130 bool need_reset; 131 struct snd_jack *jack; 132 }; 133 134 struct snd_intelhad_card { 135 struct snd_card *card; 136 struct device *dev; 137 138 /* internal stuff */ 139 int irq; 140 void __iomem *mmio_start; 141 int num_pipes; 142 int num_ports; 143 struct snd_intelhad pcm_ctx[3]; /* one for each port */ 144 }; 145 146 #endif /* _INTEL_HDMI_AUDIO_ */ 147