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Tue, 07 Jul 2026 01:41:05 -0700 (PDT) X-Received: by 2002:a17:90b:2e48:b0:384:8a11:33eb with SMTP id 98e67ed59e1d1-387575abe72mr4559398a91.24.1783413664710; Tue, 07 Jul 2026 01:41:04 -0700 (PDT) Received: from [10.218.50.222] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-387d1ad7974sm708702a91.12.2026.07.07.01.40.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 07 Jul 2026 01:41:04 -0700 (PDT) Message-ID: <447245d3-4e79-4645-a814-9dfc52fc5bf1@oss.qualcomm.com> Date: Tue, 7 Jul 2026 14:10:52 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 6/7] arm64: dts: qcom: shikra: Add GPU cooling To: Dmitry Baryshkov , Akhil P Oommen Cc: Rob Clark , Sean Paul , Konrad Dybcio , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Marijn Suijten , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Will Deacon , Robin Murphy , "Joerg Roedel (AMD)" , Bjorn Andersson , Bibek Kumar Patro , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev References: <20260707-shikra-gpu-v5-0-d2f373912d3f@oss.qualcomm.com> <20260707-shikra-gpu-v5-6-d2f373912d3f@oss.qualcomm.com> Content-Language: en-US From: Aastha Pandey In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA3MDA4MyBTYWx0ZWRfX7qnE+Qxk5jzD /1ox/QBMkOyW4qujhpgY8YKuGJF+bOCuONO3Gp48QJVfLoE7gYo1Ip9l2bYUuhl4GVlKZtyb2zG iv1l0B8Ga6i6wF6rhQjIUtfxtaVitIw= X-Proofpoint-GUID: _1YTLtdnstRy5FIRX5ziQ-eu4FWRmLHM X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA3MDA4MyBTYWx0ZWRfX1YT8CM7q9jJ2 e2HL21ubzd3EG0mJShBHoCQi+dBrO4DmgMn52PR4yRhILgGnwyOOynm5fZUOGzrLhFHOKO1kepH 7opyGfSH2LmMz23AK4J34XoKw0/rKX6vOe7RX9Drv1nPcIUGGGYTQRSnXPutxp8PtGOPYupFM9g 5LuiZ7bIoAKFgTz+OuWcl9GO5Xfrvtl9P78JfW0SlufzhjczwLroD7g9+Yw9aXJncjeMwqIyjQd E2eOdiWeP+pga+CsxVWCUGA/EG2NtcdkxszImTToiHhgGEK9tUL15eKwhoiB2OvhNGudC+eJ/I6 Olfb6RtSIKuOaxN0gV4ah78vRNaghJ9C10UHB21tBZfZ97GLe80C8uMIIJZuLYA/cU2a7d8sP8j jNleCbEjTfy1mEDIBtkv5qPHucUphBuE4P3kLka6lBhk4TiVQ8RdhOxxQlJ92t23teMhXxkoN1i i+65JFrFdzjLJeON50Q== X-Proofpoint-ORIG-GUID: _1YTLtdnstRy5FIRX5ziQ-eu4FWRmLHM X-Authority-Analysis: v=2.4 cv=bPQm5v+Z c=1 sm=1 tr=0 ts=6a4cbba2 cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=agT521uulj5WE4s-WisA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 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=2026-07-07_02,2026-07-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607070083 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260707_014108_212099_C98A202F X-CRM114-Status: GOOD ( 18.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 7/7/2026 2:58 AM, Dmitry Baryshkov wrote: > On Tue, Jul 07, 2026 at 02:34:38AM +0530, Akhil P Oommen wrote: >> From: Aastha Pandey >> >> Unlike the CPU, the GPU does not throttle its speed automatically when it >> reaches high temperatures. >> >> Set up GPU cooling by throttling the GPU speed when reaching 115°C. And >> use a passive polling delay to ensure more than one "passive" thermal >> point is considered when throttling the GPU thermal zones. > > I'm not sure I can parse this sentence. How does polling delay affect > number of thermal points to be considered? Thanks for the review. The commit message was unclear, apologies. Without passive_delay, the governor fires only on trip crossing interrupts. Can we use something like below in commit message: "Without passive_delay, the governor fires only on trip crossing interrupts. Temperature stabilizing between two trips generates no interrupt, so not all cooling levels are applied. Set passive_delay to enable periodic polling to ensure all cooling is applied." > >> >> Signed-off-by: Aastha Pandey >> Signed-off-by: Akhil P Oommen >> --- >> arch/arm64/boot/dts/qcom/shikra.dtsi | 16 +++++++++++++++- >> 1 file changed, 15 insertions(+), 1 deletion(-) >> > -- Thanks & Regards, Aastha Pandey