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[199.106.103.52]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3537ca6d202sm19172887eec.13.2026.10.10.20.30.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Oct 2026 20:30:42 -0700 (PDT) Date: Sun, 11 Oct 2026 11:30:34 +0800 From: Shawn Guo To: 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 , Bjorn Andersson , Abel Vesa , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Aastha Pandey Subject: Re: [PATCH 4/5] arm64: dts: qcom: nord: Add GPU cooling Message-ID: References: <20261009-nord-gpu1-v1-0-a06a6c57bde7@oss.qualcomm.com> <20261009-nord-gpu1-v1-4-a06a6c57bde7@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20261009-nord-gpu1-v1-4-a06a6c57bde7@oss.qualcomm.com> X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDExMDAxMyBTYWx0ZWRfXw0jltUdS0Q4I jl/g6Der+83ntnGvVI+c+3+UbahYTzerRWNusVHhvhAPqXqcsWdwEQUqKWsmQ2tFRn0JenKASdh jyst5xlju2BPiDDhIKN+TgA8ScRimoTVU59f5M2vBMvMwL2x+RO7EkQTnx/0FaWvj/wN34okt0H eFmO4oC3k134gzF1VFB0lLybM88A9mzGI0ghkoGdZ8Cbj5hhDooO7Xyaga4GOGTeKdW1Hi+VkhZ gm/Uci49FlF667WtbJB9yXuU7Sm0OjURq4ypiySNkbWynLuUCQsY7ELQE8Ainl9tV0bLOm70KLr pHXhU1Qt7FBW+UWeT/gsok86wz4R3Ru+Z6w62eTYfTE1iAqkAlOkvAx+eJoAz72x9XqpJOioegF 3bELyO0ohauwE1bmBu+eUl/MD1osk3V4Km8UYQSiccCJf4/lWApuiJbN0m0xP4IW+M1eIlIutpt k1jvQuPsrlMhNjHFtOA== X-Proofpoint-ORIG-GUID: Y3c3xzoz7FCsafGP78TGgWyZpkE-qIs4 X-Authority-Analysis: v=2.4 cv=MpTHeGae c=1 sm=1 tr=0 ts=6acb02e4 cx=c_pps a=PfFC4Oe2JQzmKTvty2cRDw==:117 a=b9+bayejhc3NMeqCNyeLQQ==:17 a=8nJEP1OIZ-IA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=eBu_aoQerpSAkrlkAZQA:9 a=3ZKOabzyN94A:10 a=wPNLvfGTeEIA:10 a=6Ab_bkdmUrQuMsNx7PHu:22 X-Proofpoint-GUID: Y3c3xzoz7FCsafGP78TGgWyZpkE-qIs4 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDExMDAxMyBTYWx0ZWRfX3bWt6Ppy06Iw Zc7TpRA7j5IU3n6wsu7KvMXolw91vFVyMNVLPjYgzd4JdP7a7+syhT9JNHjhH0h7o+2j+iZ88tg zfCDKGynfqsgvIwtw/BYuaXzo4ojY6w= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-11_01,2026-10-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 spamscore=0 adultscore=0 bulkscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610110013 On Fri, Oct 09, 2026 at 02:36:38AM +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 on Nord by throttling the Adreno 753 GPU when it > reaches 105°C. Label the GPU thermal zones and their passive trip > points, map them to the GPU as a cooling device, and add a passive > polling delay so the thermal framework can monitor the zones while > throttling. > > Signed-off-by: Aastha Pandey > Signed-off-by: Akhil P Oommen > --- > arch/arm64/boot/dts/qcom/nord-embedded.dtsi | 177 ++++++++++++++++++++++++++++ > arch/arm64/boot/dts/qcom/nord.dtsi | 80 ++++++------- > 2 files changed, 217 insertions(+), 40 deletions(-) > > diff --git a/arch/arm64/boot/dts/qcom/nord-embedded.dtsi b/arch/arm64/boot/dts/qcom/nord-embedded.dtsi > index 4379092b7bf8..23370007c974 100644 > --- a/arch/arm64/boot/dts/qcom/nord-embedded.dtsi > +++ b/arch/arm64/boot/dts/qcom/nord-embedded.dtsi > @@ -17,6 +17,7 @@ > #include > #include > #include > +#include > > #include "nord.dtsi" > > @@ -2042,3 +2043,179 @@ opp-403000000 { > }; > }; > }; > + > +&gpu_0_0_0_thermal { > + polling-delay-passive = <10>; > + > + cooling-maps { > + map0 { > + trip = <&gpu_0_0_0_alert0>; > + cooling-device = <&gpu_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; > + }; > + }; > +}; I'm not sure why this is Embedded variant specific. Can we not just update nord.dtsi as needed? Would that break GearVM variant in any way? Shawn