1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
  2//
  3// This file is provided under a dual BSD/GPLv2 license.  When using or
  4// redistributing this file, you may do so under either license.
  5//
  6// Copyright(c) 2018 Intel Corporation. All rights reserved.
  7//
  8// Authors: Keyon Jie <yang.jie@linux.intel.com>
  9
 10#include <linux/io.h>
 11#include <sound/hdaudio.h>
 12#include <sound/hda_i915.h>
 13#include <sound/hda_codec.h>
 14#include <sound/hda_register.h>
 15#include "../sof-priv.h"
 16#include "hda.h"
 17
 18#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
 19#include "../../codecs/hdac_hda.h"
 20#define sof_hda_ext_ops	snd_soc_hdac_hda_get_ops()
 21
 22static void update_codec_wake_enable(struct hdac_bus *bus, unsigned int addr, bool link_power)
 23{
 24	unsigned int mask = snd_hdac_chip_readw(bus, WAKEEN);
 25
 26	if (link_power)
 27		mask &= ~BIT(addr);
 28	else
 29		mask |= BIT(addr);
 30
 31	snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
 32}
 33
 34static void sof_hda_bus_link_power(struct hdac_device *codec, bool enable)
 35{
 36	struct hdac_bus *bus = codec->bus;
 37	bool oldstate = test_bit(codec->addr, &bus->codec_powered);
 38
 39	snd_hdac_ext_bus_link_power(codec, enable);
 40
 41	if (enable == oldstate)
 42		return;
 43
 44	/*
 45	 * Both codec driver and controller can hold references to
 46	 * display power. To avoid unnecessary power-up/down cycles,
 47	 * controller doesn't immediately release its reference.
 48	 *
 49	 * If the codec driver powers down the link, release
 50	 * the controller reference as well.
 51	 */
 52	if (codec->addr == HDA_IDISP_ADDR && !enable)
 53		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
 54
 55	/* WAKEEN needs to be set for disabled links */
 56	update_codec_wake_enable(bus, codec->addr, enable);
 57}
 58
 59static const struct hdac_bus_ops bus_core_ops = {
 60	.command = snd_hdac_bus_send_cmd,
 61	.get_response = snd_hdac_bus_get_response,
 62	.link_power = sof_hda_bus_link_power,
 63};
 64#endif
 65
 66/*
 67 * This can be used for both with/without hda link support.
 68 */
 69void sof_hda_bus_init(struct snd_sof_dev *sdev, struct device *dev)
 70{
 71	struct hdac_bus *bus = sof_to_bus(sdev);
 72
 73#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_LINK)
 74#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
 75	snd_hdac_ext_bus_init(bus, dev, &bus_core_ops, sof_hda_ext_ops);
 76#else
 77	snd_hdac_ext_bus_init(bus, dev, NULL, NULL);
 78#endif
 79#else
 80
 81	memset(bus, 0, sizeof(*bus));
 82	bus->dev = dev;
 83
 84	INIT_LIST_HEAD(&bus->stream_list);
 85
 86	bus->irq = -1;
 87
 88	/*
 89	 * There is only one HDA bus atm. keep the index as 0.
 90	 * Need to fix when there are more than one HDA bus.
 91	 */
 92	bus->idx = 0;
 93
 94	spin_lock_init(&bus->reg_lock);
 95#endif /* CONFIG_SND_SOC_SOF_HDA_LINK */
 96}
 97
 98void sof_hda_bus_exit(struct snd_sof_dev *sdev)
 99{
100#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_LINK)
101	struct hdac_bus *bus = sof_to_bus(sdev);
102
103	snd_hdac_ext_bus_exit(bus);
104#endif
105}

 1// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 2//
 3// This file is provided under a dual BSD/GPLv2 license.  When using or
 4// redistributing this file, you may do so under either license.
 5//
 6// Copyright(c) 2018 Intel Corporation. All rights reserved.
 7//
 8// Authors: Keyon Jie <yang.jie@linux.intel.com>
 9
10#include <linux/io.h>
11#include <sound/hdaudio.h>
 
 
 
12#include "../sof-priv.h"
13#include "hda.h"
14
15#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
16#include "../../codecs/hdac_hda.h"
17#define sof_hda_ext_ops	snd_soc_hdac_hda_get_ops()
18#else
19#define sof_hda_ext_ops	NULL
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
20#endif
21
22/*
23 * This can be used for both with/without hda link support.
24 */
25void sof_hda_bus_init(struct hdac_bus *bus, struct device *dev)
26{
27#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
28	snd_hdac_ext_bus_init(bus, dev, NULL, sof_hda_ext_ops);
29#else /* CONFIG_SND_SOC_SOF_HDA */
 
 
 
 
 
 
 
30	memset(bus, 0, sizeof(*bus));
31	bus->dev = dev;
32
33	INIT_LIST_HEAD(&bus->stream_list);
34
35	bus->irq = -1;
36
37	/*
38	 * There is only one HDA bus atm. keep the index as 0.
39	 * Need to fix when there are more than one HDA bus.
40	 */
41	bus->idx = 0;
42
43	spin_lock_init(&bus->reg_lock);
44#endif /* CONFIG_SND_SOC_SOF_HDA */
 
 
 
 
 
 
 
 
 
45}