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Wed, 12 Nov 2025 19:57:44 -0800 (PST) X-Google-Smtp-Source: AGHT+IE7IduW8OEUCs1R9PNoNwVWicsKHQ9VQ4Fd1cEmT7M2Z91KTvLlfdEdEG5Ogm2o7odqrbFCWg== X-Received: by 2002:a05:6a00:1399:b0:7b6:363b:c678 with SMTP id d2e1a72fcca58-7b7a27a429amr6423928b3a.6.1763006263552; Wed, 12 Nov 2025 19:57:43 -0800 (PST) Received: from [10.218.35.45] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7b9250cda04sm603906b3a.19.2025.11.12.19.57.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 12 Nov 2025 19:57:43 -0800 (PST) Message-ID: Date: Thu, 13 Nov 2025 09:27:36 +0530 Precedence: bulk X-Mailing-List: devicetree@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 Cc: 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 , 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: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTEzMDAyNCBTYWx0ZWRfX62mKYLPvm5dA ume/G8wsXVpn+oyQwho33yNB6S1JfrkMwc1aR9lAQuvPUo4Np0EHA8J94Fa8v+bD8DYoDpg3XK+ sMa4ZSdKf6SVP+CbEQe4iD4wCT+bp38NEB4s5mPa98XV+4WP/77iv1ElzJtk9bF0X9RAqEIbrQ3 0GoS1Z30OFsymp5NyyXyAPtfSea7Y4xYwWw1HmEJu4reyKG/kSHIVf7izMzBd7gbVJxRKILh3OX XAU0oMYz8r2hIanfxbQ/xI1ICZuqPJXOd+65R2oHygdZkBJM9TZ/6po1SD1jpz4VbgHQbvVy7bS lnRrBC8mD46Pk2HKEBogA8dx3hJD0inOis6a+ciiF5GMl9V6PXjF6Q8P1hXmG22W0iNHDWiskhw SHlo9USzwEtEpQgjWZoUU8YcMHAzyQ== X-Proofpoint-GUID: 63DtCEqX79Ng47mkdi69MQRrJeXL6osD X-Authority-Analysis: v=2.4 cv=bbBmkePB c=1 sm=1 tr=0 ts=69155739 cx=c_pps a=rEQLjTOiSrHUhVqRoksmgQ==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=oNbEpEU07NhVOHX3m2YA:9 a=QEXdDO2ut3YA:10 a=2VI0MkxyNR6bbpdq8BZq:22 X-Proofpoint-ORIG-GUID: 63DtCEqX79Ng47mkdi69MQRrJeXL6osD 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=2025-11-12_06,2025-11-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 priorityscore=1501 malwarescore=0 phishscore=0 spamscore=0 clxscore=1015 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511130024 On 11/10/2025 11:51 PM, Bjorn Andersson wrote: > On Tue, Oct 28, 2025 at 11:12:23PM +0530, Krishna Chaitanya Chundru wrote: >> 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, > How is that possible? This is patch 1 in the series, by definition it > doesn't have any outstanding dependencies. The regression is due to the drivers changes on non qcom platforms. - Krishna Chaitanya. > I've reverted the change. > > Regards, > Bjorn > >> we need to update the dtsi accordingly, I will send a separate for all >> controllers to enable this ECAM feature. >> >> - Krishna Chaitanya. >> >> >>> Best regards,