commit 6e761cdf797bec870a76a88df8bea34f4888ea26
author Vikram Panduranga <vpandura@codeaurora.org> Wed Oct 12 16:50:52 2016 -0700
committer Gerrit - the friendly Code Review server <code-review@localhost> Wed Jan 04 01:19:24 2017 -0800
tree 2fd67309f54a4ac80f9c3e2babc4afdc12eea2f2
parent 3db5c7992dd32cb844218a2687646e471918e507

hal: Add support for AFE sidetone

Add support for AFE sidetone for USB and non-USB
devices when device sidetone is not available or
not supported.

Change-Id: Iaacaa61fc1eddacb1fe9d58ef194d8f980d8f934
Signed-off-by: Vikram Panduranga <vpandura@codeaurora.org>
CRs-Fixed: 1061420

hal/msm8974/platform.c

diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index ffcb862..31a9f14 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -113,6 +113,9 @@
 
 #define MAX_SET_CAL_BYTE_SIZE 65536
 
+/* Mixer path names */
+#define AFE_SIDETONE_MIXER_PATH "afe-sidetone"
+
 #define AUDIO_PARAMETER_KEY_FLUENCE_TYPE  "fluence"
 #define AUDIO_PARAMETER_KEY_SLOWTALK      "st_enable"
 #define AUDIO_PARAMETER_KEY_HD_VOICE      "hd_voice"
@@ -5761,18 +5764,37 @@
             ALOGI("Debug: Disable sidetone");
         } else {
             ret = audio_extn_usb_enable_sidetone(out_snd_device, enable);
-            if (ret)
-                ALOGI("%s: usb device %d does not support device sidetone\n",
-                  __func__, out_snd_device);
+            if (ret) {
+                /*fall back to AFE sidetone*/
+                ALOGV("%s: No USB sidetone supported, switching to AFE sidetone",
+                        __func__);
+
+                if (enable)
+                    audio_route_apply_and_update_path(adev->audio_route, AFE_SIDETONE_MIXER_PATH);
+                else
+                    audio_route_reset_and_update_path(adev->audio_route, AFE_SIDETONE_MIXER_PATH);
+            }
         }
     } else {
         ALOGV("%s: sidetone out device(%d) mixer cmd = %s\n",
               __func__, out_snd_device, str);
 
-        if (enable)
-            audio_route_apply_and_update_path(adev->audio_route, str);
-        else
-            audio_route_reset_and_update_path(adev->audio_route, str);
+        if (enable) {
+            ret = audio_route_apply_and_update_path(adev->audio_route, str);
+            if (ret) {
+                ALOGV("%s: No device sidetone supported, switching to AFE sidetone",
+                        __func__);
+                audio_route_apply_and_update_path(adev->audio_route, AFE_SIDETONE_MIXER_PATH);
+            }
+        }
+        else {
+            ret = audio_route_reset_and_update_path(adev->audio_route, str);
+            if (ret) {
+                 ALOGV("%s: No device sidetone supported, switching to AFE sidetone",
+                        __func__);
+                audio_route_reset_and_update_path(adev->audio_route, AFE_SIDETONE_MIXER_PATH);
+            }
+        }
     }
     return 0;
 }