ASoC: tegra: Add I2S controls for format/mode

There are test cases in ap_audio, which check for different data
formats and producer/consumer modes for Tegra I2S and external
codec I2S. Add these controls for a full GVS coverage.

Two types of DAI links are handled:

 - Normal/codec2codec DAI links where the DAI mapping is done
   by default between Tegra and external codec I2S. So just
   calling legacy tegra_machine_add_i2s_codec_controls() API
   from override driver is good enough.

 - For DPCM case, the DAIs are not directly mapped and thus
   codec is dummy for Tegra I2S. Hence for this DAPM function
   snd_soc_dapm_dai_get_connected_widgets() is used to find
   the connected codec widget and apply the complementary DAI
   format setting.

Also use this opportunity to cleanup Linux version code check.
It is now recommended to define a macro for the relevant kernel
version and macro name is related to what actually is changing
for a kernel version.

Bug 4451662
Bug 4453772

Change-Id: I881838411af5498e4d7f1dec76b3c11ad05de12b
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3097585
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Sharad Gupta <sharadg@nvidia.com>
Reviewed-by: Mohan kumar <mkumard@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>

sound/soc/tegra/tegra_asoc_machine.c

@@ -1,15 +1,13 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/*
+// SPDX-FileCopyrightText: Copyright (c) 2014-2024 NVIDIA CORPORATION. All rights reserved.
- * tegra_asoc_machine.c - Tegra DAI links parser
+//
- *
+// tegra_asoc_machine.c - Tegra DAI links parser
- * Copyright (c) 2014-2023 NVIDIA CORPORATION.  All rights reserved.
- *
- */
 
 #include <nvidia/conftest.h>
 
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/version.h>
 #include <sound/simple_card_utils.h>
 #include <sound/jack.h>
 #include <sound/soc.h>
@@ -649,11 +647,74 @@ struct tegra_machine_control_data {
 	unsigned int master_mode;
 };
 
+static struct snd_soc_pcm_runtime *tegra_get_be(struct snd_soc_card *card,
+						struct snd_soc_dapm_widget *widget,
+						int stream)
+{
+	struct snd_soc_pcm_runtime *be;
+	struct snd_soc_dapm_widget *w;
+	struct snd_soc_dai *dai;
+	int i;
+
+	for_each_card_rtds(card, be) {
+		for_each_rtd_dais(be, i, dai) {
+			w = snd_soc_dai_get_widget(dai, stream);
+			if (w == widget)
+				return be;
+		}
+	}
+
+	return NULL;
+}
+
+/*
+ * In case of DPCM DAI link for i2s<->codec, note that the DAIs are
+ * not directly mapped. The 'rtd' for codec is different in case of
+ * a DPCM DAI link.
+ */
+static int dpcm_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
+				    unsigned int fmt)
+{
+#if defined(NV_SND_SOC_RTD_TO_CODEC_PRESENT) /* Linux 6.7*/
+	struct snd_soc_dai *dai = snd_soc_rtd_to_cpu(rtd, 0);
+#else
+	struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
+#endif
+	struct snd_soc_dapm_widget_list *list;
+	int stream = SNDRV_PCM_STREAM_PLAYBACK;
+	struct snd_soc_pcm_runtime *be;
+	struct snd_soc_dapm_widget *widget;
+	int i, ret;
+
+	/* nothing to be done if it is a normal sound card */
+	if (!rtd->card->component_chaining)
+		return 0;
+
+	snd_soc_dapm_dai_get_connected_widgets(dai, stream, &list, NULL);
+
+	for_each_dapm_widgets(list, i, widget) {
+		if (widget->id != snd_soc_dapm_dai_in &&
+		    widget->id != snd_soc_dapm_dai_out)
+			continue;
+
+		be = tegra_get_be(rtd->card, widget, stream);
+		if (!be)
+			continue;
+
+		ret = snd_soc_runtime_set_dai_fmt(be, fmt);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
 static int tegra_machine_codec_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
 					   unsigned int frame_mode,
 					   unsigned int master_mode)
 {
 	unsigned int fmt = rtd->dai_link->dai_fmt;
+	int ret;
 
 	if (frame_mode) {
 		fmt &= ~SND_SOC_DAIFMT_FORMAT_MASK;
@@ -670,7 +731,11 @@ static int tegra_machine_codec_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
 			fmt |= SND_SOC_DAIFMT_CBS_CFS;
 	}
 
-	return snd_soc_runtime_set_dai_fmt(rtd, fmt);
+	ret = snd_soc_runtime_set_dai_fmt(rtd, fmt);
+	if (ret < 0)
+		return ret;
+
+	return dpcm_runtime_set_dai_fmt(rtd, fmt);
 }
 
 /*

sound/soc/tegra/tegra_mixer_control.c

@@ -32,6 +32,8 @@
 #include <sound/soc.h>
 #include <sound/pcm_params.h>
 
+#include "tegra_asoc_machine.h"
+
 static int dai_get_rate(struct snd_kcontrol *kcontrol,
 			struct snd_ctl_elem_value *ucontrol)
 {
@@ -325,20 +327,20 @@ static int tegra_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 	struct snd_soc_dai *dai;
 
 	/* Fixup CPU DAI */
-#if KERNEL_VERSION(6, 7, 0) > LINUX_VERSION_CODE
+#if defined(NV_SND_SOC_RTD_TO_CODEC_PRESENT) /* Linux 6.7*/
-	dai = asoc_rtd_to_cpu(rtd, 0);
-#else
 	dai = snd_soc_rtd_to_cpu(rtd, 0);
+#else
+	dai = asoc_rtd_to_cpu(rtd, 0);
 #endif
 
 	if (!dai_is_dummy(dai))
 		tegra_dai_fixup(dai, params);
 
 	/* Fixup Codec DAI */
-#if KERNEL_VERSION(6, 7, 0) > LINUX_VERSION_CODE
+#if defined(NV_SND_SOC_RTD_TO_CODEC_PRESENT) /* Linux 6.7*/
-	dai = asoc_rtd_to_codec(rtd, 0);
-#else
 	dai = snd_soc_rtd_to_codec(rtd, 0);
+#else
+	dai = asoc_rtd_to_codec(rtd, 0);
 #endif
 
 	if (!dai_is_dummy(dai))
@@ -402,6 +404,8 @@ static int tegra_mixer_control_probe(struct platform_device *pdev)
 				ARRAY_SIZE(tegra210_mixer_ctls));
 	}
 
+	tegra_machine_add_i2s_codec_controls(card);
+
 	/* Fixup callback for BE codec2codec links */
 	for_each_card_rtds(card, rtd) {
 		/* Skip FE links for sound card with DPCM routes for AHUB */