LXR linux/sound/x86/intel_hdmi

   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 */
  53enum 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
  67struct 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
  76struct 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
  82struct 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 */
 102struct 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
 134struct 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