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Thu, 11 Dec 2025 00:07:59 -0800 (PST) Received: from [10.213.102.126] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7f4c22848a7sm1706651b3a.3.2025.12.11.00.07.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Dec 2025 00:07:59 -0800 (PST) From: Sivareddy Surasani Date: Thu, 11 Dec 2025 13:37:37 +0530 Subject: [PATCH 05/11] bus: mhi: host: Add support for both DL and Ul chan for poll Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251211-siva_mhi_dp2-v1-5-d2895c4ec73a@oss.qualcomm.com> References: <20251211-siva_mhi_dp2-v1-0-d2895c4ec73a@oss.qualcomm.com> In-Reply-To: <20251211-siva_mhi_dp2-v1-0-d2895c4ec73a@oss.qualcomm.com> To: Manivannan Sadhasivam , Jonathan Corbet , Arnd Bergmann , Greg Kroah-Hartman Cc: mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Upal Kumar Saha , Himanshu Shukla , Sivareddy Surasani , Vivek Pernamitta X-Mailer: b4 0.15-dev-47773 X-Proofpoint-GUID: WqRCHsTXCU-KXsZq-hOCSD6e-_iIHXbP X-Authority-Analysis: v=2.4 cv=d974CBjE c=1 sm=1 tr=0 ts=693a7be1 cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=RzC6bOiaW50bpgbzjqkA:9 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjExMDA1OSBTYWx0ZWRfX92EziiNAcjU7 jZLNMs7uJcIKU48niFih4MmOr+ntqUwgo/J3blfv/3q6pB4bvs3hiIVqYWqWh8JtCM+HgzrnHgd ezzXmABmAWxWSlLnh4MC/xPmJWPt4klUfb97P4wpssX6Cq8bU63Ucito8tv1t0Ywu5P+vn33iIv TOakXyX/gXMtlRS3tJc/RaerotupdPC6GH9add1evY3yDROJlYf4I+gXJOyzxcF4FpCUfgvzKIh XNfxg2GA/XP0G//OocJa3ANZzO9AeQv265gSIns1TjUOqVE9GWmppNDHmKP+7Gwl5TuMGB096WI /so/h26+D08KyrYWRio/ZogbGU9Fwd21PWTWgFWSw93UATyQLaWDFH+y7wi15T80UOeOZ2Ulamn q1q2OnA4GrZIgkzEV9krlycV99XApw== X-Proofpoint-ORIG-GUID: WqRCHsTXCU-KXsZq-hOCSD6e-_iIHXbP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-10_03,2025-12-09_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 impostorscore=0 spamscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1011 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512110059 From: Vivek Pernamitta Add support for both DL and Ul chan in mhi_poll. Signed-off-by: Vivek Pernamitta Signed-off-by: Sivareddy Surasani --- drivers/bus/mhi/host/main.c | 4 ++-- include/linux/mhi.h | 3 ++- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index 5d50f6ebf6f9..53bb93da4017 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -1859,10 +1859,10 @@ int mhi_get_channel_doorbell_offset(struct mhi_cont= roller *mhi_cntrl, u32 *chdb_ } EXPORT_SYMBOL_GPL(mhi_get_channel_doorbell_offset); =20 -int mhi_poll(struct mhi_device *mhi_dev, u32 budget) +int mhi_poll(struct mhi_device *mhi_dev, u32 budget, enum dma_data_directi= on dir) { struct mhi_controller *mhi_cntrl =3D mhi_dev->mhi_cntrl; - struct mhi_chan *mhi_chan =3D mhi_dev->dl_chan; + struct mhi_chan *mhi_chan =3D (dir =3D=3D DMA_TO_DEVICE) ? mhi_dev->ul_ch= an : mhi_dev->dl_chan; struct mhi_event *mhi_event =3D &mhi_cntrl->mhi_event[mhi_chan->er_index]; int ret; =20 diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 360770ddef70..299216b5e4de 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -780,8 +780,9 @@ void mhi_unprepare_from_transfer(struct mhi_device *mhi= _dev); * mhi_poll - Poll for any available data in DL direction * @mhi_dev: Device associated with the channels * @budget: # of events to process + * @dir: Set direction whether for DMA_TO_DVICE or DMA_FROM_DEVICE */ -int mhi_poll(struct mhi_device *mhi_dev, u32 budget); +int mhi_poll(struct mhi_device *mhi_dev, u32 budget, enum dma_data_directi= on dir); =20 /** * mhi_queue_buf - Send or receive raw buffers from client device over MHI --=20 2.34.1