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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e7a3484dc5
HDAC extended core should create streams for an extended bus and also free up those on cleanup. So introduce snd_hdac_ext_stream_init_all and snd_hdac_stream_free_all routines Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
453 lines
12 KiB
C
453 lines
12 KiB
C
/*
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* hdac-ext-stream.c - HD-audio extended stream operations.
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*
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* Copyright (C) 2015 Intel Corp
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* Author: Jeeja KP <jeeja.kp@intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <sound/pcm.h>
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#include <sound/hda_register.h>
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#include <sound/hdaudio_ext.h>
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/**
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* snd_hdac_ext_stream_init - initialize each stream (aka device)
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* @ebus: HD-audio ext core bus
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* @stream: HD-audio ext core stream object to initialize
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* @idx: stream index number
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* @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE)
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* @tag: the tag id to assign
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*
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* initialize the stream, if ppcap is enabled then init those and then
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* invoke hdac stream initialization routine
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*/
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void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus,
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struct hdac_ext_stream *stream,
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int idx, int direction, int tag)
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{
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struct hdac_bus *bus = &ebus->bus;
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if (ebus->ppcap) {
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stream->pphc_addr = ebus->ppcap + AZX_PPHC_BASE +
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AZX_PPHC_INTERVAL * idx;
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stream->pplc_addr = ebus->ppcap + AZX_PPLC_BASE +
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AZX_PPLC_MULTI * ebus->num_streams +
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AZX_PPLC_INTERVAL * idx;
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}
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stream->decoupled = false;
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snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
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/**
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* snd_hdac_ext_stream_init_all - create and initialize the stream objects
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* for an extended hda bus
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* @ebus: HD-audio ext core bus
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* @start_idx: start index for streams
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* @num_stream: number of streams to initialize
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* @dir: direction of streams
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*/
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int snd_hdac_ext_stream_init_all(struct hdac_ext_bus *ebus, int start_idx,
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int num_stream, int dir)
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{
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int stream_tag = 0;
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int i, tag, idx = start_idx;
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for (i = 0; i < num_stream; i++) {
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struct hdac_ext_stream *stream =
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kzalloc(sizeof(*stream), GFP_KERNEL);
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if (!stream)
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return -ENOMEM;
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tag = ++stream_tag;
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snd_hdac_ext_stream_init(ebus, stream, idx, dir, tag);
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idx++;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);
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/**
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* snd_hdac_stream_free_all - free hdac extended stream objects
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*
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* @ebus: HD-audio ext core bus
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*/
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void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus)
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{
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struct hdac_stream *s;
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struct hdac_ext_stream *stream;
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struct hdac_bus *bus = ebus_to_hbus(ebus);
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while (!list_empty(&bus->stream_list)) {
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s = list_first_entry(&bus->stream_list, struct hdac_stream, list);
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stream = stream_to_hdac_ext_stream(s);
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list_del(&s->list);
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kfree(stream);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
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/**
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* snd_hdac_ext_stream_decouple - decouple the hdac stream
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* @ebus: HD-audio ext core bus
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* @stream: HD-audio ext core stream object to initialize
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* @decouple: flag to decouple
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*/
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void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus,
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struct hdac_ext_stream *stream, bool decouple)
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{
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struct hdac_stream *hstream = &stream->hstream;
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struct hdac_bus *bus = &ebus->bus;
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spin_lock_irq(&bus->reg_lock);
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if (decouple)
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snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0,
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AZX_PPCTL_PROCEN(hstream->index));
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else
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snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL,
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AZX_PPCTL_PROCEN(hstream->index), 0);
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stream->decoupled = decouple;
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spin_unlock_irq(&bus->reg_lock);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
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/**
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* snd_hdac_ext_linkstream_start - start a stream
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* @stream: HD-audio ext core stream to start
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*/
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void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream)
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{
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snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_RUN);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
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/**
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* snd_hdac_ext_link_stream_clear - stop a stream DMA
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* @stream: HD-audio ext core stream to stop
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*/
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void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream)
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{
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snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear);
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/**
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* snd_hdac_ext_link_stream_reset - reset a stream
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* @stream: HD-audio ext core stream to reset
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*/
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void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream)
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{
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unsigned char val;
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int timeout;
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snd_hdac_ext_link_stream_clear(stream);
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snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_STRST);
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udelay(3);
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timeout = 50;
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do {
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val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) &
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AZX_PPLCCTL_STRST;
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if (val)
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break;
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udelay(3);
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} while (--timeout);
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val &= ~AZX_PPLCCTL_STRST;
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writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
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udelay(3);
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timeout = 50;
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/* waiting for hardware to report that the stream is out of reset */
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do {
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val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST;
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if (!val)
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break;
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udelay(3);
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} while (--timeout);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset);
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/**
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* snd_hdac_ext_link_stream_setup - set up the SD for streaming
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* @stream: HD-audio ext core stream to set up
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* @fmt: stream format
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*/
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int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt)
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{
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struct hdac_stream *hstream = &stream->hstream;
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unsigned int val;
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/* make sure the run bit is zero for SD */
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snd_hdac_ext_link_stream_clear(stream);
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/* program the stream_tag */
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val = readl(stream->pplc_addr + AZX_REG_PPLCCTL);
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val = (val & ~AZX_PPLCCTL_STRM_MASK) |
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(hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
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writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
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/* program the stream format */
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writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT);
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup);
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/**
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* snd_hdac_ext_link_set_stream_id - maps stream id to link output
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* @link: HD-audio ext link to set up
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* @stream: stream id
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*/
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void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
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int stream)
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{
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snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id);
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/**
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* snd_hdac_ext_link_clear_stream_id - maps stream id to link output
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* @link: HD-audio ext link to set up
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* @stream: stream id
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*/
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void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
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int stream)
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{
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snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, 0, (1 << stream));
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
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static struct hdac_ext_stream *
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hdac_ext_link_stream_assign(struct hdac_ext_bus *ebus,
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struct snd_pcm_substream *substream)
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{
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struct hdac_ext_stream *res = NULL;
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struct hdac_stream *stream = NULL;
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struct hdac_bus *hbus = &ebus->bus;
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if (!ebus->ppcap) {
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dev_err(hbus->dev, "stream type not supported\n");
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return NULL;
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}
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list_for_each_entry(stream, &hbus->stream_list, list) {
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struct hdac_ext_stream *hstream = container_of(stream,
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struct hdac_ext_stream,
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hstream);
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if (stream->direction != substream->stream)
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continue;
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/* check if decoupled stream and not in use is available */
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if (hstream->decoupled && !hstream->link_locked) {
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res = hstream;
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break;
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}
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if (!hstream->link_locked) {
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snd_hdac_ext_stream_decouple(ebus, hstream, true);
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res = hstream;
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break;
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}
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}
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if (res) {
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spin_lock_irq(&hbus->reg_lock);
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res->link_locked = 1;
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res->link_substream = substream;
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spin_unlock_irq(&hbus->reg_lock);
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}
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return res;
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}
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static struct hdac_ext_stream *
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hdac_ext_host_stream_assign(struct hdac_ext_bus *ebus,
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struct snd_pcm_substream *substream)
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{
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struct hdac_ext_stream *res = NULL;
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struct hdac_stream *stream = NULL;
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struct hdac_bus *hbus = &ebus->bus;
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int key;
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if (!ebus->ppcap) {
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dev_err(hbus->dev, "stream type not supported\n");
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return NULL;
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}
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/* make a non-zero unique key for the substream */
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key = (substream->pcm->device << 16) | (substream->number << 2) |
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(substream->stream + 1);
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list_for_each_entry(stream, &hbus->stream_list, list) {
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struct hdac_ext_stream *hstream = container_of(stream,
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struct hdac_ext_stream,
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hstream);
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if (stream->direction != substream->stream)
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continue;
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if (stream->opened) {
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if (!hstream->decoupled)
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snd_hdac_ext_stream_decouple(ebus, hstream, true);
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res = hstream;
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break;
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}
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}
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if (res) {
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spin_lock_irq(&hbus->reg_lock);
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res->hstream.opened = 1;
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res->hstream.running = 0;
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res->hstream.assigned_key = key;
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res->hstream.substream = substream;
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spin_unlock_irq(&hbus->reg_lock);
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}
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return res;
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}
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/**
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* snd_hdac_ext_stream_assign - assign a stream for the PCM
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* @ebus: HD-audio ext core bus
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* @substream: PCM substream to assign
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* @type: type of stream (coupled, host or link stream)
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*
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* This assigns the stream based on the type (coupled/host/link), for the
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* given PCM substream, assigns it and returns the stream object
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*
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* coupled: Looks for an unused stream
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* host: Looks for an unused decoupled host stream
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* link: Looks for an unused decoupled link stream
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*
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* If no stream is free, returns NULL. The function tries to keep using
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* the same stream object when it's used beforehand. when a stream is
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* decoupled, it becomes a host stream and link stream.
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*/
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struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_ext_bus *ebus,
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struct snd_pcm_substream *substream,
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int type)
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{
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struct hdac_ext_stream *hstream = NULL;
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struct hdac_stream *stream = NULL;
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struct hdac_bus *hbus = &ebus->bus;
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switch (type) {
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case HDAC_EXT_STREAM_TYPE_COUPLED:
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stream = snd_hdac_stream_assign(hbus, substream);
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if (stream)
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hstream = container_of(stream,
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struct hdac_ext_stream, hstream);
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return hstream;
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case HDAC_EXT_STREAM_TYPE_HOST:
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return hdac_ext_host_stream_assign(ebus, substream);
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case HDAC_EXT_STREAM_TYPE_LINK:
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return hdac_ext_link_stream_assign(ebus, substream);
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default:
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return NULL;
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
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/**
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* snd_hdac_ext_stream_release - release the assigned stream
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* @stream: HD-audio ext core stream to release
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* @type: type of stream (coupled, host or link stream)
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*
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* Release the stream that has been assigned by snd_hdac_ext_stream_assign().
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*/
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void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type)
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{
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struct hdac_bus *bus = stream->hstream.bus;
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struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
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switch (type) {
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case HDAC_EXT_STREAM_TYPE_COUPLED:
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snd_hdac_stream_release(&stream->hstream);
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break;
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case HDAC_EXT_STREAM_TYPE_HOST:
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if (stream->decoupled) {
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snd_hdac_ext_stream_decouple(ebus, stream, false);
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snd_hdac_stream_release(&stream->hstream);
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}
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break;
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case HDAC_EXT_STREAM_TYPE_LINK:
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if (stream->decoupled)
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snd_hdac_ext_stream_decouple(ebus, stream, false);
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spin_lock_irq(&bus->reg_lock);
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stream->link_locked = 0;
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stream->link_substream = NULL;
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spin_unlock_irq(&bus->reg_lock);
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break;
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default:
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dev_dbg(bus->dev, "Invalid type %d\n", type);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
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/**
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* snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream
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* @ebus: HD-audio ext core bus
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* @enable: flag to enable/disable SPIB
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* @index: stream index for which SPIB need to be enabled
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*/
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void snd_hdac_ext_stream_spbcap_enable(struct hdac_ext_bus *ebus,
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bool enable, int index)
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{
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u32 mask = 0;
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u32 register_mask = 0;
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struct hdac_bus *bus = &ebus->bus;
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if (!ebus->spbcap) {
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dev_err(bus->dev, "Address of SPB capability is NULL");
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return;
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}
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mask |= (1 << index);
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register_mask = snd_hdac_chip_readl(bus, SPB_SPBFCCTL);
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mask |= register_mask;
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if (enable)
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snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask);
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else
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snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
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/**
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* snd_hdac_ext_stop_streams - stop all stream if running
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* @ebus: HD-audio ext core bus
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*/
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void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus)
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{
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struct hdac_bus *bus = ebus_to_hbus(ebus);
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struct hdac_stream *stream;
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if (bus->chip_init) {
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list_for_each_entry(stream, &bus->stream_list, list)
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snd_hdac_stream_stop(stream);
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snd_hdac_bus_stop_chip(bus);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams);
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