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Mon, 13 Apr 2026 02:03:52 -0700 (PDT) X-Received: by 2002:a17:903:1b66:b0:2ad:9b86:ddc2 with SMTP id d9443c01a7336-2b2d5a18e13mr122848585ad.22.1776071032011; Mon, 13 Apr 2026 02:03:52 -0700 (PDT) Received: from [192.168.0.215] ([49.205.244.213]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b2d4db198asm109169895ad.3.2026.04.13.02.03.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Apr 2026 02:03:51 -0700 (PDT) Message-ID: <31afe536-a963-4dc8-b2ab-96ed7ebb1531@oss.qualcomm.com> Date: Mon, 13 Apr 2026 14:33:46 +0530 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 3/9] bus: mhi: Match devices exposing the protocol on the SAHARA channel To: Jeff Hugo , Jonathan Corbet , Shuah Khan , Carl Vanderlip , Oded Gabbay , Manivannan Sadhasivam , andersson@kernel.org Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, mhi@lists.linux.dev References: <20260319-sahara_protocol_new_v2-v4-0-47ad79308762@oss.qualcomm.com> <20260319-sahara_protocol_new_v2-v4-3-47ad79308762@oss.qualcomm.com> <7aeeed43-b458-4c68-98b0-e857f1ed791d@oss.qualcomm.com> Content-Language: en-US From: Kishore Batta In-Reply-To: <7aeeed43-b458-4c68-98b0-e857f1ed791d@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDEzMDA4OCBTYWx0ZWRfX7sedcXY8fSiM 2XqB5XjWpJtPPb3R4yWgI4qDi/0SJlrWBiZLUyt5mLslruPZiCjvxWNuIL2twx4vf/cG+KSPfzH jMS2DCg9VdJMWMzjQFXm6rxH8l9L1t8e0EuSQhjsEq8UHF9u+gUkZSqxawFm92ozFataTf4iJLC uZmMo8DrrAAwF8GvHV31sIDHick/groNzYpSwNIIVZ/qNNBPnxvMsMFKpIn+U44mhoRxLp4RoO8 987DPXZwMBp2RAxJQmO5b+nNZPdmkpntcFVu9JQaE+Bt4y+372gZCpiBGZOb3guJ1X4aFTfWLbp 9o2ur+byeI34WZ3KVLE5ka/9Z0/Ffob3MNY0hNyMjmXN/8NcA/vF6BMjxhDVxhTVrQfEPBx5mJV AaTeeetdt8V5+PKEfGv9tFrRUuZbJNAXTsYKyAeaHwT5G+PeMYTMkJiKvR6Z14mmY8kBjVsFslz mVoK5dljPjt8nxo3kpw== X-Proofpoint-GUID: Zx4MxPIWHE7fuNDf466mCH6Q8ax7clvd X-Authority-Analysis: v=2.4 cv=AofeGu9P c=1 sm=1 tr=0 ts=69dcb179 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=KtsNJ/6bKgz7QsArn2OSsQ==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=nb3vwdu8Oqwsy-ELd6cA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-ORIG-GUID: Zx4MxPIWHE7fuNDf466mCH6Q8ax7clvd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-13_02,2026-04-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 adultscore=0 phishscore=0 priorityscore=1501 clxscore=1015 impostorscore=0 suspectscore=0 malwarescore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604130088 On 4/10/2026 1:53 AM, Jeff Hugo wrote: > On 3/19/2026 12:31 AM, Kishore Batta wrote: >> Some Qualcomm devices expose the Sahara protocol on a generic SAHARA MHI >> channel rather than a QAIC specific channel name. As a result, the >> sahara > > "Sahara" ACK. I will correct in next version. > >> driver does not currently bind to such devices and never probes. >> >> Extend the MHI device ID match table to also match the SAHARA channel >> name. This allows the Sahara protocol driver to bind to devices that >> expose the protocol directly on a standard sahara MHI channel. > > "Sahara" ACK. I will correct in next version. > >> >> Signed-off-by: Kishore Batta >> --- >>   drivers/bus/mhi/sahara/sahara.c | 2 ++ >>   1 file changed, 2 insertions(+) >> >> diff --git a/drivers/bus/mhi/sahara/sahara.c >> b/drivers/bus/mhi/sahara/sahara.c >> index >> 8ff7b6425ac5423ef8f32117151dca10397686a8..e3499977e7c6b53bc624a8eb00d0636f2ea63307 >> 100644 >> --- a/drivers/bus/mhi/sahara/sahara.c >> +++ b/drivers/bus/mhi/sahara/sahara.c >> @@ -911,8 +911,10 @@ static void sahara_mhi_dl_xfer_cb(struct >> mhi_device *mhi_dev, struct mhi_result >>     static const struct mhi_device_id sahara_mhi_match_table[] = { >>       { .chan = "QAIC_SAHARA", }, >> +    { .chan = "SAHARA"}, > > This doesn't work and breaks bisect. At this point Sahara will bind to > QDU100, ath12k, or something else but not know how to drive one of > those devices. > > Just add this when you add QDU100 support, which looks to be patch 5. ACK. I will add this in patch 5. > >>       {}, >>   }; >> +MODULE_DEVICE_TABLE(mhi, sahara_mhi_match_table); >>     static struct mhi_driver sahara_mhi_driver = { >>       .id_table = sahara_mhi_match_table, >> >