diff --git a/media/libaudiohal/impl/Hal2AidlMapper.cpp b/media/libaudiohal/impl/Hal2AidlMapper.cpp
index f352849..0cdf0f2 100644
--- a/media/libaudiohal/impl/Hal2AidlMapper.cpp
+++ b/media/libaudiohal/impl/Hal2AidlMapper.cpp
@@ -368,16 +368,21 @@
         const AudioConfig& config, const std::optional<AudioIoFlags>& flags, int32_t ioHandle,
         AudioSource source, const std::set<int32_t>& destinationPortIds,
         AudioPortConfig* portConfig, bool* created) {
-    // These flags get removed one by one in this order when retrying port finding.
-    static const std::vector<AudioInputFlags> kOptionalInputFlags{
-        AudioInputFlags::FAST, AudioInputFlags::RAW, AudioInputFlags::VOIP_TX };
     if (auto portConfigIt = findPortConfig(config, flags, ioHandle);
             portConfigIt == mPortConfigs.end() && flags.has_value()) {
-        auto optionalInputFlagsIt = kOptionalInputFlags.begin();
+        // These input flags get removed one by one in this order when retrying port finding.
+        std::vector<AudioInputFlags> optionalInputFlags {
+            AudioInputFlags::FAST, AudioInputFlags::RAW, AudioInputFlags::VOIP_TX };
+        // For remote submix input, retry with direct input flag removed as the remote submix
+        // input is not expected to manipulate the contents of the audio stream.
+        if (mRemoteSubmixIn.has_value()) {
+            optionalInputFlags.push_back(AudioInputFlags::DIRECT);
+        }
+        auto optionalInputFlagsIt = optionalInputFlags.begin();
         AudioIoFlags matchFlags = flags.value();
         auto portsIt = findPort(config, matchFlags, destinationPortIds);
         while (portsIt == mPorts.end() && matchFlags.getTag() == AudioIoFlags::Tag::input
-                && optionalInputFlagsIt != kOptionalInputFlags.end()) {
+                && optionalInputFlagsIt != optionalInputFlags.end()) {
             if (!isBitPositionFlagSet(
                             matchFlags.get<AudioIoFlags::Tag::input>(), *optionalInputFlagsIt)) {
                 ++optionalInputFlagsIt;
@@ -392,6 +397,36 @@
                         config.toString().c_str(), flags.value().toString().c_str(),
                         matchFlags.toString().c_str());
         }
+        // These output flags get removed one by one in this order when retrying port finding.
+        std::vector<AudioOutputFlags> optionalOutputFlags { };
+        // For remote submix output, retry with these output flags removed one by one:
+        // 1. DIRECT: remote submix outputs are expected not to manipulate the contents of the
+        //            audio stream.
+        // 2. IEC958_NONAUDIO: remote submix outputs are not connected to ALSA and do not require
+        //                     non audio signalling.
+        if (mRemoteSubmixOut.has_value()) {
+            optionalOutputFlags.push_back(AudioOutputFlags::DIRECT);
+            optionalOutputFlags.push_back(AudioOutputFlags::IEC958_NONAUDIO);
+        }
+        auto optionalOutputFlagsIt = optionalOutputFlags.begin();
+        matchFlags = flags.value();
+        while (portsIt == mPorts.end() && matchFlags.getTag() == AudioIoFlags::Tag::output
+                && optionalOutputFlagsIt != optionalOutputFlags.end()) {
+            if (!isBitPositionFlagSet(
+                            matchFlags.get<AudioIoFlags::Tag::output>(),*optionalOutputFlagsIt)) {
+                ++optionalOutputFlagsIt;
+                continue;
+            }
+            matchFlags.set<AudioIoFlags::Tag::output>(matchFlags.get<AudioIoFlags::Tag::output>() &
+                    ~makeBitPositionFlagMask(*optionalOutputFlagsIt++));
+            portsIt = findPort(config, matchFlags, destinationPortIds);
+            AUGMENT_LOG(I,
+                        "mix port for config %s, flags %s was not found"
+                        "retried with flags %s",
+                        config.toString().c_str(), flags.value().toString().c_str(),
+                        matchFlags.toString().c_str());
+        }
+
         if (portsIt == mPorts.end()) {
             AUGMENT_LOG(E, "mix port for config %s, flags %s is not found",
                         config.toString().c_str(), matchFlags.toString().c_str());
@@ -792,7 +827,8 @@
     status_t status = prepareToOpenStreamHelper(ioHandle, devicePortConfig.portId,
             devicePortConfig.id, flags, source, initialConfig, cleanups, config,
             mixPortConfig, patch);
-    if (status != OK) {
+    if (status != OK && !(mRemoteSubmixOut.has_value() &&
+                initialConfig.base.format.type != AudioFormatType::PCM)) {
         // If using the client-provided config did not work out for establishing a mix port config
         // or patching, try with the device port config. Note that in general device port config and
         // mix port config are not required to be the same, however they must match if the HAL
diff --git a/services/audioflinger/datapath/AudioHwDevice.cpp b/services/audioflinger/datapath/AudioHwDevice.cpp
index 002aa69..c2e538c 100644
--- a/services/audioflinger/datapath/AudioHwDevice.cpp
+++ b/services/audioflinger/datapath/AudioHwDevice.cpp
@@ -81,6 +81,12 @@
                         status);
                     delete outputStream;
                     outputStream = nullptr;
+                } else {
+                    // on success, we need to assign the actual HAL stream config so that clients
+                    // know and can later patch correctly.
+                    config->format = originalConfig.format;
+                    config->channel_mask = originalConfig.channel_mask;
+                    config->sample_rate = originalConfig.sample_rate;
                 }
             } else {
                 ALOGE("ERROR - openOutputStream(), SPDIFEncoder does not support format 0x%08x",
@@ -154,6 +160,12 @@
                         status);
                     delete inputStream;
                     inputStream = nullptr;
+                } else {
+                    // on success, we need to assign the actual HAL stream config so that clients
+                    // know and can later patch correctly.
+                    config->format = originalConfig.format;
+                    config->channel_mask = originalConfig.channel_mask;
+                    config->sample_rate = originalConfig.sample_rate;
                 }
             } else {
                 ALOGE("ERROR - openInputStream(), SPDIFDecoder does not support format 0x%08x",
diff --git a/services/audioflinger/datapath/SpdifStreamIn.cpp b/services/audioflinger/datapath/SpdifStreamIn.cpp
index 98ce712..0090bc5 100644
--- a/services/audioflinger/datapath/SpdifStreamIn.cpp
+++ b/services/audioflinger/datapath/SpdifStreamIn.cpp
@@ -81,6 +81,11 @@
             outputDevice,
             outputDeviceAddress);
 
+    // reset config back to whatever is returned by HAL
+    config->sample_rate = customConfig.sample_rate;
+    config->format = customConfig.format;
+    config->channel_mask = customConfig.channel_mask;
+
     ALOGI("SpdifStreamIn::open() status = %d", status);
 
 #ifdef TEE_SINK
diff --git a/services/audioflinger/datapath/SpdifStreamOut.cpp b/services/audioflinger/datapath/SpdifStreamOut.cpp
index 52d66a1..a565955 100644
--- a/services/audioflinger/datapath/SpdifStreamOut.cpp
+++ b/services/audioflinger/datapath/SpdifStreamOut.cpp
@@ -81,6 +81,11 @@
             address,
             sourceMetadata);
 
+    // reset config back to whatever is returned by HAL
+    config->sample_rate = customConfig.sample_rate;
+    config->format = customConfig.format;
+    config->channel_mask = customConfig.channel_mask;
+
     ALOGI("SpdifStreamOut::open() status = %d", status);
 
 #ifdef TEE_SINK
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 8c9b17b..b9c193f 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -1613,11 +1613,16 @@
             outputDesc->open(config, nullptr /* mixerConfig */, devices, stream, &flags, output,
                              attributes);
 
-    // only accept an output with the requested parameters
+    // only accept an output with the requested parameters, unless the format can be IEC61937
+    // encapsulated and opened by AudioFlinger as wrapped IEC61937.
+    const bool ignoreRequestedParametersCheck = audio_is_iec61937_compatible(config->format)
+            && (flags & AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO)
+            && audio_has_proportional_frames(outputDesc->getFormat());
     if (status != NO_ERROR ||
-        (config->sample_rate != 0 && config->sample_rate != outputDesc->getSamplingRate()) ||
-        (config->format != AUDIO_FORMAT_DEFAULT && config->format != outputDesc->getFormat()) ||
-        (config->channel_mask != 0 && config->channel_mask != outputDesc->getChannelMask())) {
+        (!ignoreRequestedParametersCheck &&
+        ((config->sample_rate != 0 && config->sample_rate != outputDesc->getSamplingRate()) ||
+         (config->format != AUDIO_FORMAT_DEFAULT && config->format != outputDesc->getFormat()) ||
+         (config->channel_mask != 0 && config->channel_mask != outputDesc->getChannelMask())))) {
         ALOGV("%s failed opening direct output: output %d sample rate %d %d,"
                 "format %d %d, channel mask %04x %04x", __func__, *output, config->sample_rate,
                 outputDesc->getSamplingRate(), config->format, outputDesc->getFormat(),