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Wed, 15 Jul 2026 22:05:07 -0700 (PDT) X-Received: by 2002:a17:90b:224a:b0:37f:b0a9:1a68 with SMTP id 98e67ed59e1d1-38dc782c68emr17822113a91.7.1784178307415; Wed, 15 Jul 2026 22:05:07 -0700 (PDT) Received: from [10.217.216.90] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-38e3a119c56sm624747a91.16.2026.07.15.22.05.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Jul 2026 22:05:07 -0700 (PDT) Message-ID: <81c314a0-c052-4843-96a6-80d8036fa6e0@oss.qualcomm.com> Date: Thu, 16 Jul 2026 10:35:03 +0530 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] clk: qcom: gcc: Set FORCE_MEM_CORE_ON/FORCE_PERIPH_CORE_ON for PCIe pipe clocks To: Qiang Yu , Bjorn Andersson , Michael Turquette , Stephen Boyd , Brian Masney Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260714-mem_on-v1-1-f5bfb6def0a1@oss.qualcomm.com> Content-Language: en-US From: Taniya Das In-Reply-To: <20260714-mem_on-v1-1-f5bfb6def0a1@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: 5EYJCVnLig2ONyt9giTDULsYT--TTxnL X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE2MDA0OSBTYWx0ZWRfX+eO/eTiUaJwW c8IjcJQu3/2fMZiSOj08eC3aaap9hWo+4qJ08wqQtDZC5UYdmHEOexVolqR6XYMivHbiwX/yMcm ptRNlV+8xGZCUal521k6nW8FWju3ZW4= X-Proofpoint-GUID: 5EYJCVnLig2ONyt9giTDULsYT--TTxnL X-Authority-Analysis: v=2.4 cv=PN8/P/qC c=1 sm=1 tr=0 ts=6a586684 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=m8Gnl63oPaFM7zqXGsIA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE2MDA0OSBTYWx0ZWRfXyzvmtN2d+v3p A99hGjqgCwmhHEFw2oZmfa22hmrARuTLYzhCsLUIiOUyVebCh+Ab2U0hYoQF5EfShqqlqKHIawz uEASwJ6wi+1+ar2/sIJsYZRg9LVwBDAPjBlnlmo4TKzQGIyDDCrSd8jjLjlbXMuG5PN1y5e4Uoi o32vcRqnFqGMY8THMy2EbTnpg98kuWSpCgfiLQQkAaZSiou6au0YzVaGexfUyyYUPcCahN9mhrj ePC5ocOKGZWatUhrPUR/XD9dCb85ZrKVywbNbh87/U2UE82UdvI3TmMNotUxP/BM/iaxVSHqCbx lkzBfiXN7waKKZR2WoLVEZ+l8j104cr+ygBuDzB38UDpUDakXXdU/jt1NmLjy1Q23oqSJAEkUxS RQpE30FWf0z06pWNq5fOa5Sl/eMWBh5xAXJ1bgK2Tamgevsr/vOKS551jibOp1vXuFfyY5WxAlz abalL18EPQFz+F3DJsg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-16_02,2026-07-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 lowpriorityscore=0 phishscore=0 adultscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 suspectscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607160049 On 7/15/2026 11:53 AM, Qiang Yu wrote: > Setting FORCE_MEM_CORE_ON and FORCE_PERIPH_CORE_ON for the PCIe PIPE > clocks so that the inbound data path works correctly. > > Without this, the PCIe link can come up but the endpoint can not access > host memory, with the host sometimes seeing a completion timeout > reported by the EP, even though the host can still read the EP's config > space. > > This issue is seen on QDU1000, Kaanapali, Glymur and Nord. Hence, apply > FORCE_MEM_CORE_ON/FORCE_PERIPH_CORE_ON to all PCIe pipe clocks on these > platforms. > I do not see any such requirement in your code downstream, so trying to understand a why both the memory and peripheral needs to be set? As I understand this was not concluded with design to understand the reasoning behind this change. -- Thanks, Taniya Das