/* * * patch_intelhdmi.c - Patch for Intel HDMI codecs * * Copyright(c) 2008 Intel Corporation. All rights reserved. * * Authors: * Jiang Zhe * Wu Fengguang * * Maintained by: * Wu Fengguang * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include "hda_codec.h" #include "hda_local.h" #define CVT_NID 0x02 /* audio converter */ #define PIN_NID 0x03 /* HDMI output pin */ #define INTEL_HDMI_EVENT_TAG 0x08 struct intel_hdmi_spec { struct hda_multi_out multiout; struct hda_pcm pcm_rec; struct hdmi_eld sink_eld; }; static struct hda_verb pinout_enable_verb[] = { {PIN_NID, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT}, {} /* terminator */ }; static struct hda_verb pinout_disable_verb[] = { {PIN_NID, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x00}, {} }; static struct hda_verb unsolicited_response_verb[] = { {PIN_NID, AC_VERB_SET_UNSOLICITED_ENABLE, AC_USRSP_EN | INTEL_HDMI_EVENT_TAG}, {} }; static struct hda_verb def_chan_map[] = { {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x00}, {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x11}, {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x22}, {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x33}, {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x44}, {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x55}, {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x66}, {CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x77}, {} }; struct hdmi_audio_infoframe { u8 type; /* 0x84 */ u8 ver; /* 0x01 */ u8 len; /* 0x0a */ u8 checksum; /* PB0 */ u8 CC02_CT47; /* CC in bits 0:2, CT in 4:7 */ u8 SS01_SF24; u8 CXT04; u8 CA; u8 LFEPBL01_LSV36_DM_INH7; u8 reserved[5]; /* PB6 - PB10 */ }; /* * CEA speaker placement: * * FLH FCH FRH * FLW FL FLC FC FRC FR FRW * * LFE * TC * * RL RLC RC RRC RR * * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC. */ enum cea_speaker_placement { FL = (1 << 0), /* Front Left */ FC = (1 << 1), /* Front Center */ FR = (1 << 2), /* Front Right */ FLC = (1 << 3), /* Front Left Center */ FRC = (1 << 4), /* Front Right Center */ RL = (1 << 5), /* Rear Left */ RC = (1 << 6), /* Rear Center */ RR = (1 << 7), /* Rear Right */ RLC = (1 << 8), /* Rear Left Center */ RRC = (1 << 9), /* Rear Right Center */ LFE = (1 << 10), /* Low Frequency Effect */ FLW = (1 << 11), /* Front Left Wide */ FRW = (1 << 12), /* Front Right Wide */ FLH = (1 << 13), /* Front Left High */ FCH = (1 << 14), /* Front Center High */ FRH = (1 << 15), /* Front Right High */ TC = (1 << 16), /* Top Center */ }; /* * ELD SA bits in the CEA Speaker Allocation data block */ static int eld_speaker_allocation_bits[] = { [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR, [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC, /* the following are not defined in ELD yet */ [7] = FLW | FRW, [8] = FLH | FRH, [9] = TC, [10] = FCH, }; struct cea_channel_speaker_allocation { int ca_index; int speakers[8]; /* derived values, just for convenience */ int channels; int spk_mask; }; /* * This is an ordered list! * * The preceding ones have better chances to be selected by * hdmi_setup_channel_allocation(). */ static struct cea_channel_speaker_allocation channel_allocations[] = { /* channel: 8 7 6 5 4 3 2 1 */ { .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } }, /* 2.1 */ { .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } }, /* Dolby Surround */ { .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } }, { .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } }, { .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } }, { .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } }, { .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } }, { .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } }, { .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } }, /* 5.1 */ { .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } }, /* 6.1 */ { .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } }, /* 7.1 */ { .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } }, { .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } }, { .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } }, { .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } }, { .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } }, { .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } }, { .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } }, { .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } }, { .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } }, }; /* * HDMI routines */ #ifdef BE_PARANOID static void hdmi_get_dip_index(struct hda_codec *codec, hda_nid_t nid, int *packet_index, int *byte_index) { int val; val = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_INDEX, 0); *packet_index = val >> 5; *byte_index = val & 0x1f; } #endif static void hdmi_set_dip_index(struct hda_codec *codec, hda_nid_t nid, int packet_index, int byte_index) { int val; val = (packet_index << 5) | (byte_index & 0x1f); snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_HDMI_DIP_INDEX, val); } static void hdmi_write_dip_byte(struct hda_codec *codec, hda_nid_t nid, unsigned char val) { snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_HDMI_DIP_DATA, val); } static void hdmi_enable_output(struct hda_codec *codec) { /* Enable Audio InfoFrame Transmission */ hdmi_set_dip_index(codec, PIN_NID, 0x0, 0x0); snd_hda_codec_write(codec, PIN_NID, 0, AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_BEST); /* Unmute */ if (get_wcaps(codec, PIN_NID) & AC_WCAP_OUT_AMP) snd_hda_codec_write(codec, PIN_NID, 0, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE); /* Enable pin out */ snd_hda_sequence_write(codec, pinout_enable_verb); } static void hdmi_disable_output(struct hda_codec *codec) { snd_hda_sequence_write(codec, pinout_disable_verb); if (get_wcaps(codec, PIN_NID) & AC_WCAP_OUT_AMP) snd_hda_codec_write(codec, PIN_NID, 0, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE); /* * FIXME: noises may arise when playing music after reloading the * kernel module, until the next X restart or monitor repower. */ } static int hdmi_get_channel_count(struct hda_codec *codec) { return 1 + snd_hda_codec_read(codec, CVT_NID, 0, AC_VERB_GET_CVT_CHAN_COUNT, 0); } static void hdmi_set_channel_count(struct hda_codec *codec, int chs) { snd_hda_codec_write(codec, CVT_NID, 0, AC_VERB_SET_CVT_CHAN_COUNT, chs - 1); if (chs != hdmi_get_channel_count(codec)) snd_printd(KERN_INFO "HDMI channel count: expect %d, get %d\n", chs, hdmi_get_channel_count(codec)); } static void hdmi_debug_channel_mapping(struct hda_codec *codec) { #ifdef CONFIG_SND_DEBUG_VERBOSE int i; int slot; for (i = 0; i < 8; i++) { slot = snd_hda_codec_read(codec, CVT_NID, 0, AC_VERB_GET_HDMI_CHAN_SLOT, i); printk(KERN_DEBUG "HDMI: ASP channel %d => slot %d\n", slot >> 4, slot & 0x7); } #endif } static void hdmi_parse_eld(struct hda_codec *codec) { struct intel_hdmi_spec *spec = codec->spec; struct hdmi_eld *eld = &spec->sink_eld; if (!snd_hdmi_get_eld(eld, codec, PIN_NID)) snd_hdmi_show_eld(eld); } /* * Audio InfoFrame routines */ static void hdmi_debug_dip_size(struct hda_codec *codec) { #ifdef CONFIG_SND_DEBUG_VERBOSE int i; int size; size = snd_hdmi_get_eld_size(codec, PIN_NID); printk(KERN_DEBUG "HDMI: ELD buf size is %d\n", size); for (i = 0; i < 8; i++) { size = snd_hda_codec_read(codec, PIN_NID, 0, AC_VERB_GET_HDMI_DIP_SIZE, i); printk(KERN_DEBUG "HDMI: DIP GP[%d] buf size is %d\n", i, size); } #endif } static void hdmi_clear_dip_buffers(struct hda_codec *codec) { #ifdef BE_PARANOID int i, j; int size; int pi, bi; for (i = 0; i < 8; i++) { size = snd_hda_codec_read(codec, PIN_NID, 0, AC_VERB_GET_HDMI_DIP_SIZE, i); if (size == 0) continue; hdmi_set_dip_index(codec, PIN_NID, i, 0x0); for (j = 1; j < 1000; j++) { hdmi_write_dip_byte(codec, PIN_NID, 0x0); hdmi_get_dip_index(codec, PIN_NID, &pi, &bi); if (pi != i) snd_printd(KERN_INFO "dip index %d: %d != %d\n", bi, pi, i); if (bi == 0) /* byte index wrapped around */ break; } snd_printd(KERN_INFO "HDMI: DIP GP[%d] buf reported size=%d, written=%d\n", i, size, j); } #endif } static void hdmi_fill_audio_infoframe(struct hda_codec *codec, struct hdmi_audio_infoframe *ai) { u8 *params = (u8 *)ai; int i; hdmi_debug_dip_size(codec); hdmi_clear_dip_buffers(codec); /* be paranoid */ hdmi_set_dip_index(codec, PIN_NID, 0x0, 0x0); for (i = 0; i < sizeof(ai); i++) hdmi_write_dip_byte(codec, PIN_NID, params[i]); } /* * Compute derived values in channel_allocations[]. */ static void init_channel_allocations(void) { int i, j; struct cea_channel_speaker_allocation *p; for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { p = channel_allocations + i; p->channels = 0; p->spk_mask = 0; for (j = 0; j < ARRAY_SIZE(p->speakers); j++) if (p->speakers[j]) { p->channels++; p->spk_mask |= p->speakers[j]; } } } /* * The transformation takes two steps: * * eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask * spk_mask => (channel_allocations[]) => ai->CA * * TODO: it could select the wrong CA from multiple candidates. */ static int hdmi_setup_channel_allocation(struct hda_codec *codec, struct hdmi_audio_infoframe *ai) { struct intel_hdmi_spec *spec = codec->spec; struct hdmi_eld *eld = &spec->sink_eld; int i; int spk_mask = 0; int channels = 1 + (ai->CC02_CT47 & 0x7); char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; /* * CA defaults to 0 for basic stereo audio */ if (!eld->eld_ver) return 0; if (!eld->spk_alloc) return 0; if (channels <= 2) return 0; /* * expand ELD's speaker allocation mask * * ELD tells the speaker mask in a compact(paired) form, * expand ELD's notions to match the ones used by Audio InfoFrame. */ for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { if (eld->spk_alloc & (1 << i)) spk_mask |= eld_speaker_allocation_bits[i]; } /* search for the first working match in the CA table */ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { if (channels == channel_allocations[i].channels && (spk_mask & channel_allocations[i].spk_mask) == channel_allocations[i].spk_mask) { ai->CA = channel_allocations[i].ca_index; break; } } snd_print_channel_allocation(eld->spk_alloc, buf, sizeof(buf)); snd_printdd(KERN_INFO "HDMI: select CA 0x%x for %d-channel allocation: %s\n", ai->CA, channels, buf); return ai->CA; } static void hdmi_setup_channel_mapping(struct hda_codec *codec, struct hdmi_audio_infoframe *ai) { if (!ai->CA) return; /* * TODO: adjust channel mapping if necessary * ALSA sequence is front/surr/clfe/side? */ snd_hda_sequence_write(codec, def_chan_map); hdmi_debug_channel_mapping(codec); } static void hdmi_setup_audio_infoframe(struct hda_codec *codec, struct snd_pcm_substream *substream) { struct hdmi_audio_infoframe ai = { .type = 0x84, .ver = 0x01, .len = 0x0a, .CC02_CT47 = substream->runtime->channels - 1, }; hdmi_setup_channel_allocation(codec, &ai); hdmi_setup_channel_mapping(codec, &ai); hdmi_fill_audio_infoframe(codec, &ai); } /* * Unsolicited events */ static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res) { int pind = !!(res & AC_UNSOL_RES_PD); int eldv = !!(res & AC_UNSOL_RES_ELDV); printk(KERN_INFO "HDMI hot plug event: Presence_Detect=%d ELD_Valid=%d\n", pind, eldv); if (pind && eldv) { hdmi_parse_eld(codec); /* TODO: do real things about ELD */ } } static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res) { int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT; int cp_state = !!(res & AC_UNSOL_RES_CP_STATE); int cp_ready = !!(res & AC_UNSOL_RES_CP_READY); printk(KERN_INFO "HDMI content protection event: SUBTAG=0x%x CP_STATE=%d CP_READY=%d\n", subtag, cp_state, cp_ready); /* TODO */ if (cp_state) ; if (cp_ready) ; } static void intel_hdmi_unsol_event(struct hda_codec *codec, unsigned int res) { int tag = res >> AC_UNSOL_RES_TAG_SHIFT; int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT; if (tag != INTEL_HDMI_EVENT_TAG) { snd_printd(KERN_INFO "Unexpected HDMI event tag 0x%x\n", tag); return; } if (subtag == 0) hdmi_intrinsic_event(codec, res); else hdmi_non_intrinsic_event(codec, res); } /* * Callbacks */ static int intel_hdmi_playback_pcm_open(struct hda_pcm_stream *hinfo, struct hda_codec *codec, struct snd_pcm_substream *substream) { struct intel_hdmi_spec *spec = codec->spec; return snd_hda_multi_out_dig_open(codec, &spec->multiout); } static int intel_hdmi_playback_pcm_close(struct hda_pcm_stream *hinfo, struct hda_codec *codec, struct snd_pcm_substream *substream) { struct intel_hdmi_spec *spec = codec->spec; hdmi_disable_output(codec); return snd_hda_multi_out_dig_close(codec, &spec->multiout); } static int intel_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, struct hda_codec *codec, unsigned int stream_tag, unsigned int format, struct snd_pcm_substream *substream) { struct intel_hdmi_spec *spec = codec->spec; snd_hda_multi_out_dig_prepare(codec, &spec->multiout, stream_tag, format, substream); hdmi_set_channel_count(codec, substream->runtime->channels); hdmi_setup_audio_infoframe(codec, substream); hdmi_enable_output(codec); return 0; } static struct hda_pcm_stream intel_hdmi_pcm_playback = { .substreams = 1, .channels_min = 2, .channels_max = 8, .nid = CVT_NID, /* NID to query formats and rates and setup streams */ .ops = { .open = intel_hdmi_playback_pcm_open, .close = intel_hdmi_playback_pcm_close, .prepare = intel_hdmi_playback_pcm_prepare }, }; static int intel_hdmi_build_pcms(struct hda_codec *codec) { struct intel_hdmi_spec *spec = codec->spec; struct hda_pcm *info = &spec->pcm_rec; codec->num_pcms = 1; codec->pcm_info = info; info->name = "INTEL HDMI"; info->pcm_type = HDA_PCM_TYPE_HDMI; info->stream[SNDRV_PCM_STREAM_PLAYBACK] = intel_hdmi_pcm_playback; return 0; } static int intel_hdmi_build_controls(struct hda_codec *codec) { struct intel_hdmi_spec *spec = codec->spec; int err; err = snd_hda_create_spdif_out_ctls(codec, spec->multiout.dig_out_nid); if (err < 0) return err; return 0; } static int intel_hdmi_init(struct hda_codec *codec) { /* disable audio output as early as possible */ hdmi_disable_output(codec); snd_hda_sequence_write(codec, unsolicited_response_verb); return 0; } static void intel_hdmi_free(struct hda_codec *codec) { struct intel_hdmi_spec *spec = codec->spec; snd_hda_eld_proc_free(codec, &spec->sink_eld); kfree(spec); } static struct hda_codec_ops intel_hdmi_patch_ops = { .init = intel_hdmi_init, .free = intel_hdmi_free, .build_pcms = intel_hdmi_build_pcms, .build_controls = intel_hdmi_build_controls, .unsol_event = intel_hdmi_unsol_event, }; static int patch_intel_hdmi(struct hda_codec *codec) { struct intel_hdmi_spec *spec; spec = kzalloc(sizeof(*spec), GFP_KERNEL); if (spec == NULL) return -ENOMEM; spec->multiout.num_dacs = 0; /* no analog */ spec->multiout.max_channels = 8; spec->multiout.dig_out_nid = CVT_NID; codec->spec = spec; codec->patch_ops = intel_hdmi_patch_ops; snd_hda_eld_proc_new(codec, &spec->sink_eld); init_channel_allocations(); return 0; } static struct hda_codec_preset snd_hda_preset_intelhdmi[] = { { .id = 0x808629fb, .name = "G45 DEVCL", .patch = patch_intel_hdmi }, { .id = 0x80862801, .name = "G45 DEVBLC", .patch = patch_intel_hdmi }, { .id = 0x80862802, .name = "G45 DEVCTG", .patch = patch_intel_hdmi }, { .id = 0x80862803, .name = "G45 DEVELK", .patch = patch_intel_hdmi }, { .id = 0x10951392, .name = "SiI1392 HDMI", .patch = patch_intel_hdmi }, {} /* terminator */ }; MODULE_ALIAS("snd-hda-codec-id:808629fb"); MODULE_ALIAS("snd-hda-codec-id:80862801"); MODULE_ALIAS("snd-hda-codec-id:80862802"); MODULE_ALIAS("snd-hda-codec-id:80862803"); MODULE_ALIAS("snd-hda-codec-id:10951392"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Intel HDMI HD-audio codec"); static struct hda_codec_preset_list intel_list = { .preset = snd_hda_preset_intelhdmi, .owner = THIS_MODULE, }; static int __init patch_intelhdmi_init(void) { return snd_hda_add_codec_preset(&intel_list); } static void __exit patch_intelhdmi_exit(void) { snd_hda_delete_codec_preset(&intel_list); } module_init(patch_intelhdmi_init) module_exit(patch_intelhdmi_exit)