ASoC: Add tdm dynamic configuration support

Add support to use dynamic tdm slots.
The max number of tdm slots is defined in device tree
and tdm configuration is dynamically assigned based on
tdm max slots.

CRs-Fixed: 2553156
Change-Id: If444da44e02e6cbcbb4ea1e2396627745bd1e982
Signed-off-by: Vignesh Kulothungan <vigneshk@codeaurora.org>

1 files changed, 48 insertions, 4 deletions

diff --git a/asoc/kona.c b/asoc/kona.c
index 02b9e016..f8d12981 100644
--- a/asoc/kona.c
+++ b/asoc/kona.c
@@ -106,6 +106,7 @@ enum {
 
 #define TDM_MAX_SLOTS 8
 #define TDM_SLOT_WIDTH_BITS 32
+#define TDM_SLOT_WIDTH_BYTES TDM_SLOT_WIDTH_BITS/8
 
 enum {
 	TDM_PRI = 0,
@@ -192,6 +193,7 @@ struct msm_asoc_mach_data {
 	struct device_node *fsa_handle;
 	struct clk *lpass_audio_hw_vote;
 	int core_audio_vote_count;
+	u32 tdm_max_slots; /* Max TDM slots used */
 };
 
 struct tdm_port {
@@ -1989,8 +1991,11 @@ static int tdm_slot_map_put(struct snd_kcontrol *kcontrol,
 	int interface = ucontrol->value.integer.value[0];
 	int channel = ucontrol->value.integer.value[1];
 	unsigned int offset_val = 0;
+	unsigned int max_slot_offset = 0;
 	unsigned int *slot_offset = NULL;
 	struct tdm_dev_config *config = NULL;
+	struct msm_asoc_mach_data *pdata = NULL;
+	struct snd_soc_component *component = NULL;
 
 	if (interface < 0  || interface >= (TDM_INTERFACE_MAX * MAX_PATH)) {
 		pr_err("%s: incorrect interface = %d\n", __func__, interface);
@@ -2004,15 +2009,28 @@ static int tdm_slot_map_put(struct snd_kcontrol *kcontrol,
 	pr_debug("%s: interface = %d, channel = %d\n", __func__,
 		interface, channel);
 
+	component = snd_soc_kcontrol_component(kcontrol);
+	pdata = snd_soc_card_get_drvdata(component->card);
 	config = ((struct tdm_dev_config *) tdm_cfg[interface / MAX_PATH]) +
 			((interface % MAX_PATH) * TDM_PORT_MAX) + channel;
+	if (!config) {
+		pr_err("%s: tdm config is NULL\n", __func__);
+		return -EINVAL;
+	}
+
 	slot_offset = config->tdm_slot_offset;
+	if (!slot_offset) {
+		pr_err("%s: slot offset is NULL\n", __func__);
+		return -EINVAL;
+	}
+
+	max_slot_offset = TDM_SLOT_WIDTH_BYTES * (pdata->tdm_max_slots - 1);
 
-	for (slot_index = 0; slot_index < TDM_MAX_SLOTS; slot_index++) {
+	for (slot_index = 0; slot_index < pdata->tdm_max_slots; slot_index++) {
 		offset_val = ucontrol->value.integer.value[MAX_PATH +
 				slot_index];
-		/* Offset value can only be 0, 4, 8, ..28 */
-		if (offset_val % 4 == 0 && offset_val <= 28)
+		/* Offset value can only be 0, 4, 8, .. */
+		if (offset_val % 4 == 0 && offset_val <= max_slot_offset)
 			slot_offset[slot_index] = offset_val;
 		pr_debug("%s: slot offset[%d] = %d\n", __func__,
 			slot_index, slot_offset[slot_index]);
@@ -4585,14 +4603,17 @@ static int kona_tdm_snd_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	int ret = 0;
 	int slot_width = TDM_SLOT_WIDTH_BITS;
-	int channels, slots = TDM_MAX_SLOTS;
+	int channels, slots;
 	unsigned int slot_mask, rate, clk_freq;
 	unsigned int *slot_offset;
 	struct tdm_dev_config *config;
+	struct msm_asoc_mach_data *pdata = NULL;
 	unsigned int path_dir = 0, interface = 0, channel_interface = 0;
 
 	pr_debug("%s: dai id = 0x%x\n", __func__, cpu_dai->id);
 
+	pdata = snd_soc_card_get_drvdata(rtd->card);
+	slots = pdata->tdm_max_slots;
 	if (cpu_dai->id < AFE_PORT_ID_TDM_PORT_RANGE_START) {
 		pr_err("%s: dai id 0x%x not supported\n",
 			__func__, cpu_dai->id);
@@ -4616,7 +4637,16 @@ static int kona_tdm_snd_hw_params(struct snd_pcm_substream *substream,
 
 	config = ((struct tdm_dev_config *) tdm_cfg[interface]) +
 			(path_dir * TDM_PORT_MAX) + channel_interface;
+	if (!config) {
+		pr_err("%s: tdm config is NULL\n", __func__);
+		return -EINVAL;
+	}
+
 	slot_offset = config->tdm_slot_offset;
+	if (!slot_offset) {
+		pr_err("%s: slot offset is NULL\n", __func__);
+		return -EINVAL;
+	}
 
 	if (path_dir)
 		channels = tdm_tx_cfg[interface][channel_interface].channels;
@@ -8273,6 +8303,20 @@ static int msm_asoc_machine_probe(struct platform_device *pdev)
 	dev_info(&pdev->dev, "%s: Sound card %s registered\n",
 		 __func__, card->name);
 
+	ret = of_property_read_u32(pdev->dev.of_node, "qcom,tdm-max-slots",
+				   &pdata->tdm_max_slots);
+	if (ret) {
+		dev_err(&pdev->dev, "%s: No DT match for tdm max slots\n",
+				__func__);
+	}
+
+	if ((pdata->tdm_max_slots <= 0) || (pdata->tdm_max_slots >
+	     TDM_MAX_SLOTS)) {
+		pdata->tdm_max_slots = TDM_MAX_SLOTS;
+		dev_err(&pdev->dev, "%s: Using default tdm max slot: %d\n",
+				__func__, pdata->tdm_max_slots);
+	}
+
 	pdata->hph_en1_gpio_p = of_parse_phandle(pdev->dev.of_node,
 						"qcom,hph-en1-gpio", 0);
 	if (!pdata->hph_en1_gpio_p) {