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TOMOYO Linux Cross Reference
Linux/sound/x86/intel_hdmi_audio.h

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  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: platform 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         struct snd_jack *jack;
131 };
132 
133 struct snd_intelhad_card {
134         struct snd_card *card;
135         struct device *dev;
136 
137         /* internal stuff */
138         int irq;
139         void __iomem *mmio_start;
140         int num_pipes;
141         int num_ports;
142         struct snd_intelhad pcm_ctx[3]; /* one for each port */
143 };
144 
145 #endif /* _INTEL_HDMI_AUDIO_ */
146 

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