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 "../sof-priv.h" 14 #include "hda.h" 15 16 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 17 #include "../../codecs/hdac_hda.h" 18 #define sof_hda_ext_ops snd_soc_hdac_hda_get_ops() 19 #else 20 #define sof_hda_ext_ops NULL 21 #endif 22 23 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) 24 static void sof_hda_bus_link_power(struct hdac_device *codec, bool enable) 25 { 26 struct hdac_bus *bus = codec->bus; 27 bool oldstate = test_bit(codec->addr, &bus->codec_powered); 28 29 snd_hdac_ext_bus_link_power(codec, enable); 30 31 if (enable == oldstate) 32 return; 33 34 /* 35 * Both codec driver and controller can hold references to 36 * display power. To avoid unnecessary power-up/down cycles, 37 * controller doesn't immediately release its reference. 38 * 39 * If the codec driver powers down the link, release 40 * the controller reference as well. 41 */ 42 if (codec->addr == HDA_IDISP_ADDR && !enable) 43 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false); 44 } 45 46 static const struct hdac_bus_ops bus_core_ops = { 47 .command = snd_hdac_bus_send_cmd, 48 .get_response = snd_hdac_bus_get_response, 49 .link_power = sof_hda_bus_link_power, 50 }; 51 #endif 52 53 /* 54 * This can be used for both with/without hda link support. 55 */ 56 void sof_hda_bus_init(struct hdac_bus *bus, struct device *dev) 57 { 58 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) 59 snd_hdac_ext_bus_init(bus, dev, &bus_core_ops, sof_hda_ext_ops); 60 #else /* CONFIG_SND_SOC_SOF_HDA */ 61 memset(bus, 0, sizeof(*bus)); 62 bus->dev = dev; 63 64 INIT_LIST_HEAD(&bus->stream_list); 65 66 bus->irq = -1; 67 68 /* 69 * There is only one HDA bus atm. keep the index as 0. 70 * Need to fix when there are more than one HDA bus. 71 */ 72 bus->idx = 0; 73 74 spin_lock_init(&bus->reg_lock); 75 #endif /* CONFIG_SND_SOC_SOF_HDA */ 76 } 77