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Tue, 28 Oct 2025 10:42:35 -0700 (PDT) X-Google-Smtp-Source: AGHT+IF8YmrED6GOKiOwqc3GYd5ad4wsT16uGbVKCFKeOMcE0bVa3igKgSnhX7LKmDH5DOEt31TBtw== X-Received: by 2002:a17:902:e5c8:b0:275:81ca:2c5 with SMTP id d9443c01a7336-294cb5376c9mr68893255ad.59.1761673355274; Tue, 28 Oct 2025 10:42:35 -0700 (PDT) Received: from [192.168.29.63] ([49.43.225.158]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29498d0c414sm123607725ad.44.2025.10.28.10.42.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Oct 2025 10:42:34 -0700 (PDT) Message-ID: Date: Tue, 28 Oct 2025 23:12:23 +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: (subset) [PATCH v8 0/5] PCI: dwc: Add ECAM support with iATU configuration To: Bjorn Andersson , cros-qcom-dts-watchers@chromium.org, Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Pieralisi , Manivannan Sadhasivam , =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Jingoo Han Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, quic_vbadigan@quicinc.com, quic_mrana@quicinc.com, quic_vpernami@quicinc.com, mmareddy@quicinc.com, Konrad Dybcio References: <20250828-ecam_v4-v8-0-92a30e0fa02d@oss.qualcomm.com> <176160465177.73268.9869510926279916233.b4-ty@kernel.org> Content-Language: en-US From: Krishna Chaitanya Chundru In-Reply-To: <176160465177.73268.9869510926279916233.b4-ty@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: v87oXZcbCpW6SXxHoCc1TjxL7FFe1zXG X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDI4MDE1MCBTYWx0ZWRfXyBiSNodSVgLR G5F2pvwiCGPqe7rS4UJ+2/caPecYRj35JgV3poqFEPXITFl1CNKvxFgxlzjAV0Qjo47vUVuuXJW aFIhMHJqFPyA4kO0WtJ+zVuQTQdWwHDMuzrIAslyhv2D4kbG//JdJ7qbnlV84fZe2EgNeMg/gEK j2Y1i/7L6FFCN7+Oom+YEmkNgizGjtVyxnSA68d5+ymEYRGDHqX9NTCEhcQ9G1lX0ONLhjACtwT hTHc3EdnDArgTs7kU7/7T/CutekqaDajRYF89I1mViQ9kDenhgbrIiocPuLV7EIlAb6FQ7r+WF5 NVM7Is+i3fwoLf/06V8nCMjQY7r8hWpE5fg2JTdovtAUWIQdQMf8j1Bymi0yYRqiBEtc1WaXLPr JsNneB+KsSEgt0KILcJrgzaX7LPcfw== X-Authority-Analysis: v=2.4 cv=IcCKmGqa c=1 sm=1 tr=0 ts=6901008c cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=jzToj74tLtS9RNrshGflUA==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=DjtaZYkIGepEHi-_gOIA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-GUID: v87oXZcbCpW6SXxHoCc1TjxL7FFe1zXG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-28_06,2025-10-22_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1015 suspectscore=0 impostorscore=0 spamscore=0 priorityscore=1501 adultscore=0 malwarescore=0 bulkscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510020000 definitions=main-2510280150 On 10/28/2025 4:07 AM, Bjorn Andersson wrote: > On Thu, 28 Aug 2025 13:04:21 +0530, Krishna Chaitanya Chundru wrote: >> The current implementation requires iATU for every configuration >> space access which increases latency & cpu utilization. >> >> Designware databook 5.20a, section 3.10.10.3 says about CFG Shift Feature, >> which shifts/maps the BDF (bits [31:16] of the third header DWORD, which >> would be matched against the Base and Limit addresses) of the incoming >> CfgRd0/CfgWr0 down to bits[27:12]of the translated address. >> >> [...] > Applied, thanks! > > [1/5] arm64: dts: qcom: sc7280: Increase config size to 256MB for ECAM feature > commit: 03e928442d469f7d8dafc549638730647202d9ce Hi Bjorn, Can you revert this change, this is regression due to this series due to that we have change the logic, we need to update the dtsi accordingly, I will send a separate for all controllers to enable this ECAM feature. - Krishna Chaitanya. > Best regards,