gfps: 添加认证测试和FAQ 20260505

Change-Id: I71e676b997159a141ca07d16f82a73b45f4b2410

1.+手机端点击+ring+stop，耳机端并未停止响铃.md

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+# 1. 手机端点击 ring stop，耳机端并未停止响铃
+
+<span class="jira-issue" jira-key="BB2BUG-18476"> <a href="https://jira.realtek.com/browse/BB2BUG-18476" class="jira-issue-key"><img src="https://jira.realtek.com/secure/viewavatar?size=xsmall&amp;avatarId=10916&amp;avatarType=issuetype" />BB2BUG-18476</a> - <span class="summary">\[BB2\]\[8773ESL\]\[v3.13.0.7\]\[GFPS\]\[LE Audio\]Find device响铃时，有时候停止响铃失败</span> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-current jira-macro-single-issue-export-pdf">In Progress</span> </span>
+
+<span style="color: rgb(32,33,36);">手机端点击 ring stop，耳机端并未停止响铃</span>
+
+<span style="color: rgb(32,33,36);">原因是：</span>
+
+<span style="color: rgb(32,33,36);">手机端有尝试发送停止响铃的cmd 给耳机端，</span>
+
+但是因为我们耳机端没有发credit给手机，
+
+导致手机端认为耳机端没有剩余的credit了，
+
+进而手机端没办法发送停止响铃的cmd到耳机端，
+
+\
+
+From google：
+
+\
+hi tony:\
+11：27：45 pair\
+11：27：55 connect LE Audio\
+11：28：07 Ring Left，11：28：14 Mute Left，sucess\
+11：28：23 Ring Right，11：28：27 Mute Right，Mute Right fail
+
+Line 135172: 07-13 11:28:26.957 10166  8442  8442 I FastPair: FindDevice: Sending ring event, pre left false, pre right true
+
+\
+//it seems fast pair has already send mute right cmd\
+Line 135173: 07-13 11:28:26.957 10166  8442  8442 I FastPair: FindDevice: Sending ring event, left false, right false\
+Line 135174: 07-13 11:28:26.958 10166  2946  4749 I NearbyDiscovery: FastPair: send ring, device=XX:XX:XX:XX:65:0C <span class="error">\[CONTEXT service_id=265 \]</span>
+
+however in phone's hci log, 11：28：27 we do not see  mute right cmd
+
+it seems that after 11:28:22.960783, FP cannot send any message via L2CAP.
+
+<span style="color: rgb(23,43,77);">LE L2cap channel is not disconnected in the log. </span>
+
+<span style="color: rgb(23,43,77);">Can you help to see why the PSM cannot be found? thanks</span>
+
+\
+
+Hey Danni,
+
+I filter the HCI with btl2cap.psm == 0x0080, Seeker can receive the battery info from the L2cap event stream,
+
+but the problem here is Seeker cannot send message to the Provider.
+
+\
+It looks like a similar issue (google internal ticket: <a href="https://issuetracker.google.com/issues/158958522#comment12" class="external-link" rel="nofollow">b/158958522#comment12</a>) when we worked with realtek on ringing through RFCOMM.
+
+From <span class="nobr"><a href="mailto:wade_li@realsil.com.cn" class="external-link" rel="nofollow">wade_li@realsil.com.cn<sup><img src="images/1.+手机端点击+ring+stop，耳机端并未停止响铃_1f96683b.gif" /></sup></a></span> on Jul 2020.
+
+> I check the differences with the HCI snoop log again. And find that phone has no RFC credits continue to send command.
+>
+> Actually, I will try to send credits after received RFC data.
+
+Could you help to see if the issue can be fixed when Provider handles the credit correctly?
+
+Thanks!
+
+\
+
+<span style="color: rgb(32,33,36);">hi  tony:</span>\
+<span style="color: rgb(32,33,36);">The reason is Provider do not send credit to seeker, we have already fix this issue and test sucess.</span>\
+\
+<span style="color: rgb(32,33,36);">we have another problem：some times seeker do not create LE L2CAP channel,  I will create another jira, thanks</span>
+
+\
+
+\