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[199.106.103.254]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-3f50b510088sm3526487fac.11.2025.12.05.07.08.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Dec 2025 07:08:24 -0800 (PST) Message-ID: <73508b26-bc71-4661-bf2d-cfce0eb1df13@oss.qualcomm.com> Date: Fri, 5 Dec 2025 07:08:21 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] PCI: qcom-ep: Add support for firmware-managed PCIe Endpoint To: Mrinmay Sarkar , Bjorn Helgaas , Lorenzo Pieralisi , =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel Cc: linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@oss.qualcomm.com, Manivannan Sadhasivam , Krishna Chaitanya Chundru , quic_vbadigan@quicinc.com, quic_shazhuss@quicinc.com, konrad.dybcio@oss.qualcomm.com, Rama Krishna , Ayiluri Naga Rashmi , Nitesh Gupta References: <20251203-firmware_managed_ep-v1-0-295977600fa5@oss.qualcomm.com> <20251203-firmware_managed_ep-v1-2-295977600fa5@oss.qualcomm.com> From: Jeff Johnson Content-Language: en-US In-Reply-To: <20251203-firmware_managed_ep-v1-2-295977600fa5@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: yAOxsB7dtU0npToqskn2L-SIRYsnDQcg X-Proofpoint-GUID: yAOxsB7dtU0npToqskn2L-SIRYsnDQcg X-Authority-Analysis: v=2.4 cv=DrNbOW/+ c=1 sm=1 tr=0 ts=6932f569 cx=c_pps a=4ztaESFFfuz8Af0l9swBwA==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=YnIKxIlAgHF9ygR4tIEA:9 a=QEXdDO2ut3YA:10 a=D0TqAXdIGyEA:10 a=xa8LZTUigIcA:10 a=TPnrazJqx2CeVZ-ItzZ-:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjA1MDEwOSBTYWx0ZWRfX7Wo6yyUrgq0n AMskMAeYUoNwmH7P+jh95I2ECADzhJUHg9UEL4gL/gdSuZvjVH7qjE7egGtxKWLHj5AADIwmYmO C5dRUl3tQ9U4KI7Dq/NBRPNzoBGZX+1KI0OFznJLPEfAIlqRF4OGsnmWyleprrFicck3AO3hYT5 nTRC+jcMb+GPrH9LnWL0SEvyDoUZv7X63aYhxwBx2e5c7VxxBOCbqdWuJTci8fHqaec8g249ZbR B1s43vXxBzcvwpIqimjT23vvDZD8defWh6NVKpsDYbinvG1tIxVN4mkvxR3O7/mzRYxH9qLqG0X 9PUnFRyQyVJdIu6B9tvpXZbMbryEWgCfneIwrAcYhilSgb8Wg41e+TeU//1RSAH0RkKRy9ImhXE 8HviuK2Z5VF9p19Y//UAwKsBFmBx0w== 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=2025-12-05_05,2025-12-04_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 clxscore=1015 malwarescore=0 phishscore=0 impostorscore=0 bulkscore=0 spamscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512050109 On 12/3/2025 5:26 AM, Mrinmay Sarkar wrote: > Some Qualcomm platforms use firmware to manage PCIe resources such as > clocks, resets, and PHY through the SCMI interface. In these cases, > the Linux driver should not perform resource enable or disable > operations directly. Additionally, runtime PM support has been enabled > to ensure proper power state transitions. > > This commit introduces a `firmware_managed` flag in the Endpoint please review: https://www.kernel.org/doc/html/latest/process/submitting-patches.html#describe-your-changes "Describe your changes in imperative mood"