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