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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | // SPDX-License-Identifier: (GPL-2.0+ OR MIT) /* * dw-hdmi-gp-audio.c * * Copyright 2020-2022 NXP */ #include <linux/io.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <drm/bridge/dw_hdmi.h> #include <drm/drm_edid.h> #include <drm/drm_connector.h> #include <sound/hdmi-codec.h> #include <sound/asoundef.h> #include <sound/core.h> #include <sound/initval.h> #include <sound/pcm.h> #include <sound/pcm_drm_eld.h> #include <sound/pcm_iec958.h> #include <sound/dmaengine_pcm.h> #include "dw-hdmi-audio.h" #define DRIVER_NAME "dw-hdmi-gp-audio" #define DRV_NAME "hdmi-gp-audio" struct snd_dw_hdmi { struct dw_hdmi_audio_data data; struct platform_device *audio_pdev; unsigned int pos; }; struct dw_hdmi_channel_conf { u8 conf1; u8 ca; }; /* * The default mapping of ALSA channels to HDMI channels and speaker * allocation bits. Note that we can't do channel remapping here - * channels must be in the same order. * * Mappings for alsa-lib pcm/surround*.conf files: * * Front Sur4.0 Sur4.1 Sur5.0 Sur5.1 Sur7.1 * Channels 2 4 6 6 6 8 * * Our mapping from ALSA channel to CEA686D speaker name and HDMI channel: * * Number of ALSA channels * ALSA Channel 2 3 4 5 6 7 8 * 0 FL:0 = = = = = = * 1 FR:1 = = = = = = * 2 FC:3 RL:4 LFE:2 = = = * 3 RR:5 RL:4 FC:3 = = * 4 RR:5 RL:4 = = * 5 RR:5 = = * 6 RC:6 = * 7 RLC/FRC RLC/FRC */ static struct dw_hdmi_channel_conf default_hdmi_channel_config[7] = { { 0x03, 0x00 }, /* FL,FR */ { 0x0b, 0x02 }, /* FL,FR,FC */ { 0x33, 0x08 }, /* FL,FR,RL,RR */ { 0x37, 0x09 }, /* FL,FR,LFE,RL,RR */ { 0x3f, 0x0b }, /* FL,FR,LFE,FC,RL,RR */ { 0x7f, 0x0f }, /* FL,FR,LFE,FC,RL,RR,RC */ { 0xff, 0x13 }, /* FL,FR,LFE,FC,RL,RR,[FR]RC,[FR]LC */ }; static int audio_hw_params(struct device *dev, void *data, struct hdmi_codec_daifmt *daifmt, struct hdmi_codec_params *params) { struct snd_dw_hdmi *dw = dev_get_drvdata(dev); u8 ca; dw_hdmi_set_sample_rate(dw->data.hdmi, params->sample_rate); ca = default_hdmi_channel_config[params->channels - 2].ca; dw_hdmi_set_channel_count(dw->data.hdmi, params->channels); dw_hdmi_set_channel_allocation(dw->data.hdmi, ca); dw_hdmi_set_sample_non_pcm(dw->data.hdmi, params->iec.status[0] & IEC958_AES0_NONAUDIO); dw_hdmi_set_sample_width(dw->data.hdmi, params->sample_width); return 0; } static void audio_shutdown(struct device *dev, void *data) { } static int audio_mute_stream(struct device *dev, void *data, bool enable, int direction) { struct snd_dw_hdmi *dw = dev_get_drvdata(dev); if (!enable) dw_hdmi_audio_enable(dw->data.hdmi); else dw_hdmi_audio_disable(dw->data.hdmi); return 0; } static int audio_get_eld(struct device *dev, void *data, u8 *buf, size_t len) { struct dw_hdmi_audio_data *audio = data; u8 *eld; eld = audio->get_eld(audio->hdmi); if (eld) memcpy(buf, eld, min_t(size_t, MAX_ELD_BYTES, len)); else /* Pass en empty ELD if connector not available */ memset(buf, 0, len); return 0; } static int audio_hook_plugged_cb(struct device *dev, void *data, hdmi_codec_plugged_cb fn, struct device *codec_dev) { struct snd_dw_hdmi *dw = dev_get_drvdata(dev); return dw_hdmi_set_plugged_cb(dw->data.hdmi, fn, codec_dev); } static const struct hdmi_codec_ops audio_codec_ops = { .hw_params = audio_hw_params, .audio_shutdown = audio_shutdown, .mute_stream = audio_mute_stream, .get_eld = audio_get_eld, .hook_plugged_cb = audio_hook_plugged_cb, }; static int snd_dw_hdmi_probe(struct platform_device *pdev) { struct dw_hdmi_audio_data *data = pdev->dev.platform_data; struct snd_dw_hdmi *dw; const struct hdmi_codec_pdata codec_data = { .i2s = 1, .spdif = 0, .ops = &audio_codec_ops, .max_i2s_channels = 8, .data = data, }; dw = devm_kzalloc(&pdev->dev, sizeof(*dw), GFP_KERNEL); if (!dw) return -ENOMEM; dw->data = *data; platform_set_drvdata(pdev, dw); dw->audio_pdev = platform_device_register_data(&pdev->dev, HDMI_CODEC_DRV_NAME, 1, &codec_data, sizeof(codec_data)); return PTR_ERR_OR_ZERO(dw->audio_pdev); } static void snd_dw_hdmi_remove(struct platform_device *pdev) { struct snd_dw_hdmi *dw = platform_get_drvdata(pdev); platform_device_unregister(dw->audio_pdev); } static struct platform_driver snd_dw_hdmi_driver = { .probe = snd_dw_hdmi_probe, .remove_new = snd_dw_hdmi_remove, .driver = { .name = DRIVER_NAME, }, }; module_platform_driver(snd_dw_hdmi_driver); MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>"); MODULE_DESCRIPTION("Synopsys Designware HDMI GPA ALSA interface"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" DRIVER_NAME); |