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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b65e7da2bc7sm1372236966b.16.2025.10.22.10.09.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 22 Oct 2025 10:09:41 -0700 (PDT) Message-ID: <5d6e7303-cc57-4a50-a9ad-b45d3c89d045@oss.qualcomm.com> Date: Wed, 22 Oct 2025 19:09:38 +0200 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 RFC RFT] drm/msm: adreno: attach the GMU device to a driver To: Neil Armstrong , Rob Clark , Sean Paul , Konrad Dybcio , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Marijn Suijten , David Airlie , Simona Vetter Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20251022-topic-adreno-attach-gmu-to-driver-v1-1-999037f7c83e@linaro.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20251022-topic-adreno-attach-gmu-to-driver-v1-1-999037f7c83e@linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: kG2fUYu1TMJjg41T8GIgaCvfrleI7y9W X-Proofpoint-ORIG-GUID: kG2fUYu1TMJjg41T8GIgaCvfrleI7y9W X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDE4MDAyMyBTYWx0ZWRfX4U4X4ChMY4V2 dECjZlQ27IjM1KV34kU+7rOdKKAWv6U77y+v2UNqjvoBnDH6MM9+mv32NAklmBZ+ezMRL/ulwTU U7RvfR+5QekK+05NmbPPGUzrgPRLxIj9UZTmD7sh128i8r5H2QColXN6is792GKHF6YMwIgkFXf +w/m6rrEiKM8GRxqA1ukOso/wIoH/Fz0/YxFQTAUP0vEwvGMW67kUvHc66puxwV4GLKnUJ/WbmN KtONFHkhypSjTYHxzc7N/RaCzIF4LB+btlt2/Jbj+U2KBb1A48A5wj3KsJJ33aSY0kQBH4+V4vg q54CUsRxlCpeMslSqDBBVyIXsUfahTduwiOKTaFolZN4tyT6BC5VdyrQNDcnDcRxzGUCZPSq/9L E3/ml9Z+l0vGU1sELXp4AsKz1fFpcw== X-Authority-Analysis: v=2.4 cv=E/vAZKdl c=1 sm=1 tr=0 ts=68f90fd7 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=PIh8tp-2QVCGfq0cSFkA:9 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22 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=2025-10-22_07,2025-10-22_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 phishscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510020000 definitions=main-2510180023 On 10/22/25 2:44 PM, Neil Armstrong wrote: > Due to the sync_state is enabled by default in pmdomain & CCF since v6.17, > the GCC and GPUCC sync_state would stay pending, leaving the resources in > full performance: > gcc-x1e80100 100000.clock-controller: sync_state() pending due to 3d6a000.gmu > gpucc-x1e80100 3d90000.clock-controller: sync_state() pending due to 3d6a000.gmu Does this *actually* cause any harm, by the way? For example on x1e, GMU refers to 2 GPU_CC GDSCs, GPU_CC refers to a pair of GCC clocks and GCC refers to VDD_CX and I see these prints, yet: /sys/kernel/debug/pm_genpd/gpu_cx_gdsc/current_state:off-0 /sys/kernel/debug/pm_genpd/gpu_gx_gdsc/current_state:off-0 /sys/kernel/debug/pm_genpd/cx/current_state:on /sys/kernel/debug/pm_genpd/cx/perf_state:256 # because of USB3 votes I'm not super sure where that sync_state comes from either (maybe dev_set_drv_sync_state in pmdomain/core?) Konrad