intel_hdmi_audio.h
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/*
* Copyright (C) 2016 Intel Corporation
* Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
* Ramesh Babu K V <ramesh.babu@intel.com>
* Vaibhav Agarwal <vaibhav.agarwal@intel.com>
* Jerome Anand <jerome.anand@intel.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _INTEL_HDMI_AUDIO_H_
#define _INTEL_HDMI_AUDIO_H_
#include "intel_hdmi_lpe_audio.h"
#define MAX_PB_STREAMS 1
#define MAX_CAP_STREAMS 0
#define BYTES_PER_WORD 0x4
#define INTEL_HAD "HdmiLpeAudio"
/*
* CEA speaker placement:
*
* FL FLC FC FRC FR
*
* LFE
*
* RL RLC RC RRC RR
*
* The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M
* corresponds to CEA RL/RR; The SMPTE channel _assignment_ C/LFE is
* swapped to CEA LFE/FC.
*/
enum cea_speaker_placement {
FL = (1 << 0), /* Front Left */
FC = (1 << 1), /* Front Center */
FR = (1 << 2), /* Front Right */
FLC = (1 << 3), /* Front Left Center */
FRC = (1 << 4), /* Front Right Center */
RL = (1 << 5), /* Rear Left */
RC = (1 << 6), /* Rear Center */
RR = (1 << 7), /* Rear Right */
RLC = (1 << 8), /* Rear Left Center */
RRC = (1 << 9), /* Rear Right Center */
LFE = (1 << 10), /* Low Frequency Effect */
};
struct cea_channel_speaker_allocation {
int ca_index;
int speakers[8];
/* derived values, just for convenience */
int channels;
int spk_mask;
};
struct channel_map_table {
unsigned char map; /* ALSA API channel map position */
unsigned char cea_slot; /* CEA slot value */
int spk_mask; /* speaker position bit mask */
};
struct pcm_stream_info {
struct snd_pcm_substream *substream;
int substream_refcount;
};
/*
* struct snd_intelhad - intelhad driver structure
*
* @card: ptr to hold card details
* @connected: the monitor connection status
* @stream_info: stream information
* @eld: holds ELD info
* @curr_buf: pointer to hold current active ring buf
* @valid_buf_cnt: ring buffer count for stream
* @had_spinlock: driver lock
* @aes_bits: IEC958 status bits
* @buff_done: id of current buffer done intr
* @dev: platoform device handle
* @chmap: holds channel map info
*/
struct snd_intelhad {
struct snd_intelhad_card *card_ctx;
bool connected;
struct pcm_stream_info stream_info;
unsigned char eld[HDMI_MAX_ELD_BYTES];
bool dp_output;
unsigned int aes_bits;
spinlock_t had_spinlock;
struct device *dev;
struct snd_pcm_chmap *chmap;
int tmds_clock_speed;
int link_rate;
int port; /* fixed */
int pipe; /* can change dynamically */
/* ring buffer (BD) position index */
unsigned int bd_head;
/* PCM buffer position indices */
unsigned int pcmbuf_head; /* being processed */
unsigned int pcmbuf_filled; /* to be filled */
unsigned int num_bds; /* number of BDs */
unsigned int period_bytes; /* PCM period size in bytes */
/* internal stuff */
union aud_cfg aud_config; /* AUD_CONFIG reg value cache */
struct work_struct hdmi_audio_wq;
struct mutex mutex; /* for protecting chmap and eld */
bool need_reset;
struct snd_jack *jack;
};
struct snd_intelhad_card {
struct snd_card *card;
struct device *dev;
/* internal stuff */
int irq;
void __iomem *mmio_start;
int num_pipes;
int num_ports;
struct snd_intelhad pcm_ctx[3]; /* one for each port */
};
#endif /* _INTEL_HDMI_AUDIO_ */