To support the DP-MST multiple streams via single connector feature, the HDMI driver was extended with the concept of backup PCMs. See commit 9152085defb6 ("ALSA: hda - add DP MST audio support").

This implementation works fine with snd_hda_intel.c as PCM topology is fully managed within the single driver.

When the HDA codec driver is used from ASoC components, the concept of backup PCMs no longer fits. For ASoC topologies, the physical HDMI converters are presented as backend DAIs and these should match with hardware capabilities. The ASoC topology may define arbitrary PCMs (i.e. frontend DAIs) and have processing elements before eventual routing to the HDMI BE DAIs. With backup PCMs, the link between FE and BE DAIs would become dynamic and change when monitors are (un)plugged. This would lead to modifying the topology every time hotplug events happen, which is not currently possible in ASoC and there does not seem to be any obvious benefits from this design.

To overcome above problems and enable the HDMI driver to be used from ASoC, this patch adds a new mode (mst_no_extra_pcms flags) to patch_hdmi.c. In this mode, the codec driver does not assume the backup PCMs to be created.

Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com Reviewed-by: Takashi Iwai tiwai@suse.de Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- include/sound/hda_codec.h | 1 + sound/pci/hda/patch_hdmi.c | 19 ++++++++++++++----- 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/include/sound/hda_codec.h b/include/sound/hda_codec.h index 9a0393cf024c..ac18f428eda6 100644 --- a/include/sound/hda_codec.h +++ b/include/sound/hda_codec.h @@ -254,6 +254,7 @@ struct hda_codec { unsigned int force_pin_prefix:1; /* Add location prefix */ unsigned int link_down_at_suspend:1; /* link down at runtime suspend */ unsigned int relaxed_resume:1; /* don't resume forcibly for jack */ + unsigned int mst_no_extra_pcms:1; /* no backup PCMs for DP-MST */

#ifdef CONFIG_PM unsigned long power_on_acct; diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index bca5de78e9ad..59aaee4a40fd 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2072,15 +2072,24 @@ static bool is_hdmi_pcm_attached(struct hdac_device *hdac, int pcm_idx) static int generic_hdmi_build_pcms(struct hda_codec *codec) { struct hdmi_spec *spec = codec->spec; - int idx; + int idx, pcm_num;

/* * for non-mst mode, pcm number is the same as before - * for DP MST mode, pcm number is (nid number + dev_num - 1) - * dev_num is the device entry number in a pin - * + * for DP MST mode without extra PCM, pcm number is same + * for DP MST mode with extra PCMs, pcm number is + * (nid number + dev_num - 1) + * dev_num is the device entry number in a pin */ - for (idx = 0; idx < spec->num_nids + spec->dev_num - 1; idx++) { + + if (codec->mst_no_extra_pcms) + pcm_num = spec->num_nids; + else + pcm_num = spec->num_nids + spec->dev_num - 1; + + codec_dbg(codec, "hdmi: pcm_num set to %d\n", pcm_num); + + for (idx = 0; idx < pcm_num; idx++) { struct hda_pcm *info; struct hda_pcm_stream *pstr;

Add support for using snd-hda-codec-hdmi driver for HDMI/DP instead of ASoC hdac-hdmi. This is aligned with how other HDA codecs are already handled.

When snd-hda-codec-hdmi is used, the PCM device numbers are parsed from card topology and passed to the codec driver. This needs to be done at runtime as topology changes may affect PCM device allocation.

Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- include/sound/soc-acpi.h | 2 + sound/soc/intel/boards/hda_dsp_common.h | 93 ++++++++++++++++++++ sound/soc/intel/boards/skl_hda_dsp_common.c | 10 ++- sound/soc/intel/boards/skl_hda_dsp_common.h | 23 +++++ sound/soc/intel/boards/skl_hda_dsp_generic.c | 1 + 5 files changed, 128 insertions(+), 1 deletion(-) create mode 100644 sound/soc/intel/boards/hda_dsp_common.h

diff --git a/include/sound/soc-acpi.h b/include/sound/soc-acpi.h index 35b38e41e5b2..26d57bc9a91e 100644 --- a/include/sound/soc-acpi.h +++ b/include/sound/soc-acpi.h @@ -60,12 +60,14 @@ static inline struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg) * @acpi_ipc_irq_index: used for BYT-CR detection * @platform: string used for HDaudio codec support * @codec_mask: used for HDAudio support + * @common_hdmi_codec_drv: use commom HDAudio HDMI codec driver */ struct snd_soc_acpi_mach_params { u32 acpi_ipc_irq_index; const char *platform; u32 codec_mask; u32 dmic_num; + bool common_hdmi_codec_drv; };

/** diff --git a/sound/soc/intel/boards/hda_dsp_common.h b/sound/soc/intel/boards/hda_dsp_common.h new file mode 100644 index 000000000000..569a80098d48 --- /dev/null +++ b/sound/soc/intel/boards/hda_dsp_common.h @@ -0,0 +1,93 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright(c) 2019 Intel Corporation. + */ + +/* + * This file defines helper functions used by multiple + * Intel HDA based machine drivers. + */ + +#ifndef __HDA_DSP_COMMON_H +#define __HDA_DSP_COMMON_H + +#include <sound/hda_codec.h> +#include "../../codecs/hdac_hda.h" + +/* + * Search card topology and return PCM device number + * matching Nth HDMI device (zero-based index). + */ +static inline struct snd_pcm *hda_dsp_hdmi_pcm_handle(struct snd_soc_card *card, + int hdmi_idx) +{ + struct snd_soc_pcm_runtime *rtd; + struct snd_pcm *spcm; + int i = 0; + + for_each_card_rtds(card, rtd) { + spcm = rtd->pcm ? + rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].pcm : 0; + if (spcm && strstr(spcm->id, "HDMI")) { + if (i == hdmi_idx) + return rtd->pcm; + ++i; + } + } + + return 0; +} + +#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) +/* + * Search card topology and register HDMI PCM related controls + * to codec driver. + */ +static inline int hda_dsp_hdmi_build_controls(struct snd_soc_card *card, + struct snd_soc_component *comp) +{ + struct hdac_hda_priv *hda_pvt; + struct hda_codec *hcodec; + struct snd_pcm *spcm; + struct hda_pcm *hpcm; + int err = 0, i = 0; + + if (!comp) + return -EINVAL; + + hda_pvt = snd_soc_component_get_drvdata(comp); + hcodec = &hda_pvt->codec; + + list_for_each_entry(hpcm, &hcodec->pcm_list_head, list) { + spcm = hda_dsp_hdmi_pcm_handle(card, i); + if (spcm) { + hpcm->pcm = spcm; + hpcm->device = spcm->device; + dev_dbg(card->dev, + "%s: mapping HDMI converter %d to PCM %d (%p)\n", + __func__, i, hpcm->device, spcm); + } else { + hpcm->pcm = 0; + hpcm->device = SNDRV_PCM_INVALID_DEVICE; + dev_warn(card->dev, + "%s: no PCM in topology for HDMI converter %d\n\n", + __func__, i); + } + i++; + } + + err = snd_hda_codec_build_controls(hcodec); + if (err < 0) + dev_err(card->dev, "unable to create controls %d\n", err); + + return err; +} +#else +static inline int hda_dsp_hdmi_build_controls(struct snd_soc_card *card, + struct snd_soc_component *comp) +{ + return -EINVAL; +} +#endif + +#endif /* __HDA_DSP_COMMON_H */ diff --git a/sound/soc/intel/boards/skl_hda_dsp_common.c b/sound/soc/intel/boards/skl_hda_dsp_common.c index 58409b6e476e..b5c0150f9cb8 100644 --- a/sound/soc/intel/boards/skl_hda_dsp_common.c +++ b/sound/soc/intel/boards/skl_hda_dsp_common.c @@ -14,6 +14,9 @@ #include "../../codecs/hdac_hdmi.h" #include "skl_hda_dsp_common.h"

+#include <sound/hda_codec.h> +#include "../../codecs/hdac_hda.h" + #define NAME_SIZE 32

int skl_hda_hdmi_add_pcm(struct snd_soc_card *card, int device) @@ -136,14 +139,19 @@ int skl_hda_hdmi_jack_init(struct snd_soc_card *card) char jack_name[NAME_SIZE]; int err;

+ if (ctx->common_hdmi_codec_drv) + return skl_hda_hdmi_build_controls(card); + list_for_each_entry(pcm, &ctx->hdmi_pcm_list, head) { + if (!pcm) + continue; + component = pcm->codec_dai->component; snprintf(jack_name, sizeof(jack_name), "HDMI/DP, pcm=%d Jack", pcm->device); err = snd_soc_card_jack_new(card, jack_name, SND_JACK_AVOUT, &pcm->hdmi_jack, NULL, 0); - if (err) return err;

diff --git a/sound/soc/intel/boards/skl_hda_dsp_common.h b/sound/soc/intel/boards/skl_hda_dsp_common.h index daa582e513b2..bbe6e2acfda3 100644 --- a/sound/soc/intel/boards/skl_hda_dsp_common.h +++ b/sound/soc/intel/boards/skl_hda_dsp_common.h @@ -14,6 +14,9 @@ #include <linux/platform_device.h> #include <sound/core.h> #include <sound/jack.h> +#include <sound/hda_codec.h> +#include "../../codecs/hdac_hda.h" +#include "hda_dsp_common.h"

#define HDA_DSP_MAX_BE_DAI_LINKS 7

@@ -29,10 +32,30 @@ struct skl_hda_private { int pcm_count; int dai_index; const char *platform_name; + bool common_hdmi_codec_drv; };

extern struct snd_soc_dai_link skl_hda_be_dai_links[HDA_DSP_MAX_BE_DAI_LINKS]; int skl_hda_hdmi_jack_init(struct snd_soc_card *card); int skl_hda_hdmi_add_pcm(struct snd_soc_card *card, int device);

+/* + * Search card topology and register HDMI PCM related controls + * to codec driver. + */ +static inline int skl_hda_hdmi_build_controls(struct snd_soc_card *card) +{ + struct skl_hda_private *ctx = snd_soc_card_get_drvdata(card); + struct snd_soc_component *component; + struct skl_hda_hdmi_pcm *pcm; + + pcm = list_first_entry(&ctx->hdmi_pcm_list, struct skl_hda_hdmi_pcm, + head); + component = pcm->codec_dai->component; + if (!component) + return -EINVAL; + + return hda_dsp_hdmi_build_controls(card, component); +} + #endif /* __SOUND_SOC_HDA_DSP_COMMON_H */ diff --git a/sound/soc/intel/boards/skl_hda_dsp_generic.c b/sound/soc/intel/boards/skl_hda_dsp_generic.c index 1778acdc367c..b4e2bec576f0 100644 --- a/sound/soc/intel/boards/skl_hda_dsp_generic.c +++ b/sound/soc/intel/boards/skl_hda_dsp_generic.c @@ -178,6 +178,7 @@ static int skl_hda_audio_probe(struct platform_device *pdev) ctx->pcm_count = hda_soc_card.num_links; ctx->dai_index = 1; /* hdmi codec dai name starts from index 1 */ ctx->platform_name = mach->mach_params.platform; + ctx->common_hdmi_codec_drv = mach->mach_params.common_hdmi_codec_drv;

hda_soc_card.dev = &pdev->dev; snd_soc_card_set_drvdata(&hda_soc_card, ctx);

Add support to implement HDMI/DP audio by using the common snd-hda-codec-hdmi driver.

Change of codec driver affects user-space as the the two drivers expose different mixer controls. A new kernel module option "use_common_hdmi" is added to user-space to indicate which interface should be used. The default driver can be selected via a Kconfig option.

Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com --- sound/soc/sof/intel/Kconfig | 10 ++++++++++ sound/soc/sof/intel/hda-codec.c | 22 ++++++++++++++++++---- sound/soc/sof/intel/hda.c | 6 ++++++ sound/soc/sof/intel/hda.h | 6 ++++-- 4 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/sound/soc/sof/intel/Kconfig b/sound/soc/sof/intel/Kconfig index 479ba249e219..a8f4e69b044d 100644 --- a/sound/soc/sof/intel/Kconfig +++ b/sound/soc/sof/intel/Kconfig @@ -273,6 +273,16 @@ config SND_SOC_SOF_HDA_AUDIO_CODEC Say Y if you want to enable HDAudio codecs with SOF. If unsure select "N".

+config SND_SOC_SOF_HDA_COMMON_HDMI_CODEC + bool "SOF common HDA HDMI codec driver" + depends on SND_SOC_SOF_HDA_LINK + depends on SND_HDA_CODEC_HDMI + help + This adds support for HDMI audio by using the common HDA + HDMI/DisplayPort codec driver. + Say Y if you want to use the common codec driver with SOF. + If unsure select "Y". + endif ## SND_SOC_SOF_HDA_COMMON

config SND_SOC_SOF_HDA_LINK_BASELINE diff --git a/sound/soc/sof/intel/hda-codec.c b/sound/soc/sof/intel/hda-codec.c index 3ca6795a89ba..805e3ef7638e 100644 --- a/sound/soc/sof/intel/hda-codec.c +++ b/sound/soc/sof/intel/hda-codec.c @@ -84,6 +84,8 @@ static int hda_codec_probe(struct snd_sof_dev *sdev, int address) { #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) struct hdac_hda_priv *hda_priv; + struct snd_soc_acpi_mach_params *mach_params = 0; + struct snd_sof_pdata *pdata = sdev->pdata; #endif struct hda_bus *hbus = sof_to_hbus(sdev); struct hdac_device *hdev; @@ -113,8 +115,19 @@ static int hda_codec_probe(struct snd_sof_dev *sdev, int address) if (ret < 0) return ret;

- /* use legacy bus only for HDA codecs, idisp uses ext bus */ - if ((resp & 0xFFFF0000) != IDISP_VID_INTEL) { + if (pdata->machine) + mach_params = (struct snd_soc_acpi_mach_params *) + &pdata->machine->mach_params; + + if (mach_params && mach_params->common_hdmi_codec_drv) + hda_priv->need_display_power = true; + + /* + * if common HDMI codec driver is not used, codec load + * is skipped here and hdac_hdmi is used instead + */ + if ((mach_params && mach_params->common_hdmi_codec_drv) || + (resp & 0xFFFF0000) != IDISP_VID_INTEL) { hdev->type = HDA_DEV_LEGACY; hda_codec_load_module(&hda_priv->codec); } @@ -155,7 +168,8 @@ int hda_codec_probe_bus(struct snd_sof_dev *sdev) } EXPORT_SYMBOL(hda_codec_probe_bus);

-#if IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI) +#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || \ + IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)

void hda_codec_i915_get(struct snd_sof_dev *sdev) { @@ -204,6 +218,6 @@ int hda_codec_i915_exit(struct snd_sof_dev *sdev) } EXPORT_SYMBOL(hda_codec_i915_exit);

-#endif /* CONFIG_SND_SOC_HDAC_HDMI */ +#endif

MODULE_LICENSE("Dual BSD/GPL"); diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c index c72e9a09eee1..ee742157516e 100644 --- a/sound/soc/sof/intel/hda.c +++ b/sound/soc/sof/intel/hda.c @@ -54,6 +54,11 @@ MODULE_PARM_DESC(use_msi, "SOF HDA use PCI MSI mode"); static int hda_dmic_num = -1; module_param_named(dmic_num, hda_dmic_num, int, 0444); MODULE_PARM_DESC(dmic_num, "SOF HDA DMIC number"); + +static bool hda_codec_use_common_hdmi = + IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_COMMON_HDMI_CODEC); +module_param_named(use_common_hdmi, hda_codec_use_common_hdmi, bool, 0444); +MODULE_PARM_DESC(use_common_hdmi, "SOF HDA use common HDMI codec driver"); #endif

static const struct hda_dsp_msg_code hda_dsp_rom_msg[] = { @@ -458,6 +463,7 @@ static int hda_init_caps(struct snd_sof_dev *sdev) &pdata->machine->mach_params; mach_params->codec_mask = bus->codec_mask; mach_params->platform = dev_name(sdev->dev); + mach_params->common_hdmi_codec_drv = hda_codec_use_common_hdmi; }

/* create codec instances */ diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index 5591841a1b6f..28640a29e1b6 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -562,7 +562,9 @@ void hda_codec_jack_check(struct snd_sof_dev *sdev);

#endif /* CONFIG_SND_SOC_SOF_HDA */

-#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) && IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI) +#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) && \ + (IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || \ + IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))

void hda_codec_i915_get(struct snd_sof_dev *sdev); void hda_codec_i915_put(struct snd_sof_dev *sdev); @@ -576,7 +578,7 @@ static inline void hda_codec_i915_put(struct snd_sof_dev *sdev) { } static inline int hda_codec_i915_init(struct snd_sof_dev *sdev) { return 0; } static inline int hda_codec_i915_exit(struct snd_sof_dev *sdev) { return 0; }

-#endif /* CONFIG_SND_SOC_SOF_HDA && CONFIG_SND_SOC_HDAC_HDMI */ +#endif

/* * Trace Control.

Add support for using snd-hda-codec-hdmi driver for HDMI/DP instead of ASoC hdac-hdmi. This is aligned with how other HDA codecs are already handled.

Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/intel/boards/glk_rt5682_max98357a.c | 11 +++++++++++ 1 file changed, 11 insertions(+)

diff --git a/sound/soc/intel/boards/glk_rt5682_max98357a.c b/sound/soc/intel/boards/glk_rt5682_max98357a.c index bd2d371f2acd..b36264d1d1cd 100644 --- a/sound/soc/intel/boards/glk_rt5682_max98357a.c +++ b/sound/soc/intel/boards/glk_rt5682_max98357a.c @@ -19,6 +19,7 @@ #include <sound/soc-acpi.h> #include "../../codecs/rt5682.h" #include "../../codecs/hdac_hdmi.h" +#include "hda_dsp_common.h"

/* The platform clock outputs 19.2Mhz clock to codec as I2S MCLK */ #define GLK_PLAT_CLK_FREQ 19200000 @@ -41,6 +42,7 @@ struct glk_hdmi_pcm { struct glk_card_private { struct snd_soc_jack geminilake_headset; struct list_head hdmi_pcm_list; + bool common_hdmi_codec_drv; };

enum { @@ -545,6 +547,13 @@ static int glk_card_late_probe(struct snd_soc_card *card) int err = 0; int i = 0;

+ pcm = list_first_entry(&ctx->hdmi_pcm_list, struct glk_hdmi_pcm, + head); + component = pcm->codec_dai->component; + + if (ctx->common_hdmi_codec_drv) + return hda_dsp_hdmi_build_controls(card, component); + list_for_each_entry(pcm, &ctx->hdmi_pcm_list, head) { component = pcm->codec_dai->component; snprintf(jack_name, sizeof(jack_name), @@ -612,6 +621,8 @@ static int geminilake_audio_probe(struct platform_device *pdev) if (ret) return ret;

+ ctx->common_hdmi_codec_drv = mach->mach_params.common_hdmi_codec_drv; + return devm_snd_soc_register_card(&pdev->dev, card); }

Add support for using snd-hda-codec-hdmi driver for HDMI/DP instead of ASoC hdac-hdmi. This is aligned with how other HDA codecs are already handled.

Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/intel/boards/bxt_rt298.c | 11 +++++++++++ 1 file changed, 11 insertions(+)

diff --git a/sound/soc/intel/boards/bxt_rt298.c b/sound/soc/intel/boards/bxt_rt298.c index adf416a49b48..eabf9d8468ae 100644 --- a/sound/soc/intel/boards/bxt_rt298.c +++ b/sound/soc/intel/boards/bxt_rt298.c @@ -18,6 +18,7 @@ #include <sound/pcm_params.h> #include "../../codecs/hdac_hdmi.h" #include "../../codecs/rt298.h" +#include "hda_dsp_common.h"

/* Headset jack detection DAPM pins */ static struct snd_soc_jack broxton_headset; @@ -31,6 +32,7 @@ struct bxt_hdmi_pcm {

struct bxt_rt286_private { struct list_head hdmi_pcm_list; + bool common_hdmi_codec_drv; };

enum { @@ -527,6 +529,13 @@ static int bxt_card_late_probe(struct snd_soc_card *card) int err, i = 0; char jack_name[NAME_SIZE];

+ pcm = list_first_entry(&ctx->hdmi_pcm_list, struct bxt_hdmi_pcm, + head); + component = pcm->codec_dai->component; + + if (ctx->common_hdmi_codec_drv) + return hda_dsp_hdmi_build_controls(card, component); + list_for_each_entry(pcm, &ctx->hdmi_pcm_list, head) { component = pcm->codec_dai->component; snprintf(jack_name, sizeof(jack_name), @@ -626,6 +635,8 @@ static int broxton_audio_probe(struct platform_device *pdev) if (ret) return ret;

+ ctx->common_hdmi_codec_drv = mach->mach_params.common_hdmi_codec_drv; + return devm_snd_soc_register_card(&pdev->dev, card); }