MT-134832: Set SAI1 and SAI2 to dsp_b format (nxp-imx#28)

Author: AmeNote-Michael

arch/arm64/boot/dts/freescale/mt-connect.dts

@@ -141,7 +141,7 @@
         model = "imx-audio-card";
         pri-dai-link {
             link-name = "interproc audio";
-            format = "i2s";
+            format = "dsp_b";
 			dai-tdm-slot-num = <8>;
 			dai-tdm-slot-width = <32>;
 			fsl,mclk-equal-bclk;
@@ -156,7 +156,7 @@
         model = "imx-audio-card";		
         pri-dai-link {
             link-name = "Headphone audio";
-            format = "i2s";
+            format = "dsp_b";
 			dai-tdm-slot-num = <2>;
 			dai-tdm-slot-width = <32>;
 			fsl,mclk-equal-bclk;

sound/soc/fsl/fsl_sai.c

@@ -294,7 +294,11 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
 		 * data word.
 		 */
 		val_cr2 |= FSL_SAI_CR2_BCP;
-		val_cr4 |= FSL_SAI_CR4_FSE | FSL_SAI_CR4_FSP;
+
+		/* NOTE: For some reason, even though we select dsp_b format, this setting is still being
+		called. The val_cr4 |= FSL_SAI_CR4_FSE | FSL_SAI_CR4_FSP is incorrect. For now on MT Connect
+		we will use this setting but corrected for our use. We MUST resolve this in future.
+		*/
 		break;
 	case SND_SOC_DAIFMT_LEFT_J:
 		/*