samples: usb: uac2_implicit: Allow using 8 channels

Signed-off-by: Adam Kondraciuk <[email protected]>

Author: adamkondraciuk

samples/subsys/usb/uac2_implicit_feedback/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

@@ -41,7 +41,7 @@ i2s_rxtx: &tdm130 {
 	reserved-memory {
 		cpuflpr_dma_region: memory@2fc12e00 {
 			compatible = "nordic,owned-memory", "zephyr,memory-region";
-			reg = <0x2fc12e00 512>;
+			reg = <0x2fc12e00 1024>;
 			status = "okay";
 			#memory-region-cells = <0>;
 			nordic,access = <NRF_OWNER_ID_APPLICATION NRF_PERM_RW>;

samples/subsys/usb/uac2_implicit_feedback/flpr/boards/nrf54h20dk_nrf54h20_cpuflpr.overlay

@@ -8,7 +8,7 @@
 	reserved-memory {
 		cpuflpr_dma_region: memory@2fc12e00 {
 			compatible = "nordic,owned-memory", "zephyr,memory-region";
-			reg = <0x2fc12e00 512>;
+			reg = <0x2fc12e00 1024>;
 			status = "okay";
 			#memory-region-cells = <0>;
 			nordic,access = <NRF_OWNER_ID_APPLICATION NRF_PERM_RW>;

samples/subsys/usb/uac2_implicit_feedback/flpr/src/main.c

@@ -10,10 +10,14 @@
 LOG_MODULE_REGISTER(main, 1);
 /* === BUFFERS === */
 /* buffers configuration */
-#define ISO_IN_CH_CNT  4
-#define ISO_OUT_CH_CNT 2
+#define ISO_IN_CH_CNT  8
+#define ISO_OUT_CH_CNT 8
 #define TDM_WORD_SIZE 32
 
+#if ISO_IN_CH_CNT != ISO_OUT_CH_CNT
+#error "Assymetric configuration is not supported."
+#endif
+
 #if ISO_IN_CH_CNT > ISO_OUT_CH_CNT
 #define TDM_CH_CNT ISO_IN_CH_CNT
 #else
@@ -363,7 +367,7 @@ static void tdm_set_rx_ptr(bool first)
 	}
 
 	context.tdm_rx.len[context.tdm_rx.idx] = tdm_get_len(&context.tdm_rx, NULL, tdm_rx);
-	nrf_tdm_rx_count_set(NRF_TDM130, TDM_GET_MAX_LEN(context.tdm_rx.len[context.tdm_rx.idx], TDM_RX_CH_CNT));
+	nrf_tdm_rx_count_set(NRF_TDM130, context.tdm_rx.len[context.tdm_rx.idx]);
 	nrf_tdm_rx_buffer_set(NRF_TDM130, (uint32_t *)buf);
 
 	context.tdm_rx.idx = (context.tdm_rx.idx + 1) & 0x1;
@@ -384,15 +388,17 @@ static void tdm_set_tx_ptr(void)
 	}
 
 	context.tdm_tx.idx = (context.tdm_tx.idx + 1) & 0x1;
-	nrf_tdm_tx_count_set(NRF_TDM130, TDM_GET_MAX_LEN(len, TDM_TX_CH_CNT));
+	nrf_tdm_tx_count_set(NRF_TDM130, len);
 	nrf_tdm_tx_buffer_set(NRF_TDM130, (uint32_t *)tx_buf);
 }
 
 static void tdm_start(void)
 {
+	bool sck_bypass = (SCK_DIV_VALUE > 0x80000000) ? (true) : (false);
+
 	nrf_tdm_enable(NRF_TDM130);
 	nrf_tdm_configure(NRF_TDM130, &m_cfg);
-	nrf_tdm_sck_configure(NRF_TDM130, NRF_TDM_SRC_ACLK, false);
+	nrf_tdm_sck_configure(NRF_TDM130, NRF_TDM_SRC_ACLK, sck_bypass);
 	nrf_tdm_mck_configure(NRF_TDM130, NRF_TDM_SRC_ACLK, false);
 	nrf_tdm_event_clear(NRF_TDM130, NRF_TDM_EVENT_RXPTRUPD);
 	nrf_tdm_event_clear(NRF_TDM130, NRF_TDM_EVENT_TXPTRUPD);