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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5d80675a3ebsm2100297a12.7.2024.12.20.14.05.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 20 Dec 2024 14:05:58 -0800 (PST) Message-ID: <2d1570a2-511a-4200-b4cc-60f56cfe4423@oss.qualcomm.com> Date: Fri, 20 Dec 2024 23:05:56 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v3 1/5] dt-bindings: net: wireless: Describe ath12k PCI module with WSI To: Konrad Dybcio , Jeff Johnson , Raj Kumar Bhagat , ath12k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Kalle Valo , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jeff Johnson , Bjorn Andersson , Konrad Dybcio , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20241105180444.770951-1-quic_rajkbhag@quicinc.com> <20241105180444.770951-2-quic_rajkbhag@quicinc.com> <9cbdca90-e76c-4ebb-a236-a0edbd94a629@oss.qualcomm.com> <62c599b5-20b2-4e1e-810d-e4502abbc682@oss.qualcomm.com> <768ef22a-855b-472d-9432-49db7daaf2df@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <768ef22a-855b-472d-9432-49db7daaf2df@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: 4gWVs33P1DevTDsYIW4QJ7ZbtRml4twp X-Proofpoint-GUID: 4gWVs33P1DevTDsYIW4QJ7ZbtRml4twp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxlogscore=999 spamscore=0 priorityscore=1501 bulkscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 adultscore=0 suspectscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412200178 On 20.12.2024 11:05 PM, Konrad Dybcio wrote: > On 20.12.2024 10:47 PM, Jeff Johnson wrote: >> On 12/20/2024 12:03 PM, Konrad Dybcio wrote: >>> On 5.11.2024 7:04 PM, Raj Kumar Bhagat wrote: >>>> The QCN9274 WiFi device supports WSI (WLAN Serial Interface). WSI is used >>>> to exchange specific control information across radios using a doorbell >>>> mechanism. This WSI connection is essential for exchanging control >>>> information among these devices. The WSI interface in the QCN9274 includes >>>> TX and RX ports, which are used to connect multiple WSI-supported devices >>>> together, forming a WSI group. >>>> >>>> Describe QCN9274 PCI wifi device with WSI interface. >>>> >>>> Signed-off-by: Raj Kumar Bhagat >>>> --- >>> >>> I think this description is missing the key points: >>> >>> * what is that control information (power, data, radio stuff?) >>> * what happens when the OS is unaware of all of this (i.e. what happens when >>> we don't send any configuration) >>> * is this configurable, or does this describe a physical wiring topology >>> (what/who decides which of the group configurations detailed below take >>> effect) >>> >>> And the ultimate question: >>> * can the devices not just talk among themselves and negotiate that? >>> >>> Though AFAICU PCIe P2P communication is a shaky topic, so perhaps the answer >>> to the last question is 'no' >>> >>> Konrad >> >> We already pushed the non-RFC version to our -next tree so we cannot update >> the commit description without a forced push. >> >> https://lore.kernel.org/all/20241211153432.775335-2-kvalo@kernel.org/ >> >> However, Raj Kumar can submit an update to the description in the file, which >> is probably the better place to have this information anyway. > > Sounds good (although bindings usually land with Krzysztof's or Rob's review tags, but that's between you and them to talk about now) Konrad