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Mon, 19 Oct 2026 23:19:17 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c4090dd10ebsm448275366b.22.2026.10.19.23.19.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 Oct 2026 23:19:17 -0700 (PDT) Message-ID: <3dd32c54-eb1a-410f-8c42-9152e87ecb2c@oss.qualcomm.com> Date: Tue, 20 Oct 2026 08:19:14 +0200 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/3] drm/msm/a5xx: Reset the GPU when resuming it To: fabricioakio@gmail.com, Rob Clark , Sean Paul , Konrad Dybcio , Akhil P Oommen , 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, Paul Sajna References: <20261019-a5xx-gpu-pm-v2-0-457aafbb28da@gmail.com> <20261019-a5xx-gpu-pm-v2-1-457aafbb28da@gmail.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261019-a5xx-gpu-pm-v2-1-457aafbb28da@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: SLnsjFp__qMP1550HoR84E-Po9mppvU- X-Proofpoint-ORIG-GUID: SLnsjFp__qMP1550HoR84E-Po9mppvU- X-Authority-Analysis: v=2.4 cv=L7qI0OT8 c=1 sm=1 tr=0 ts=6ad707e7 cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=pGLkceISAAAA:8 a=IPAj4E8Ak8Ehd_2eMQ0A:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIwMDAyNCBTYWx0ZWRfX/maI6niT9j9O Vgk1BCi/IrF/432dRtIM+bd8tyzoijxvVXr5QjexlQqTnMHB7Vl1UGygw446ldZrfoot7z7Vtbj KpN4DZgSprzRtMZUHxKpvwlZZ2Cns0VJRnPIObn8X6YH1m3ep8MNmIYSTS3lLWa+QSi2capsxez MN0JlfeOgy5A+GvgevGg9JJmViEbt46EKD1/AweL3zJVUR7B0OgtEk7B0oPiz+Tz4m7lyPIcRqI ouD1K5gThEFdWew2VWW7wsER+mg1DitmzD4gtzc8RRg5aodx3Fu3+lXVI60s9r5kfy633y16/1i O9s1ItNB4wySSvpvZOfeCBoTZUTWgZ4idjxytJIdhOSKF3HT028XQR25SlPVurn2XoQ1IS15Nb/ /wx+tG8qey8nJ8EvBIXz6UFp1KfiAw1ujoGMBtGSwmkyvbmo/crbxSe7UTnJr5gx4mEL4shvFJx rYugN3C1cy1hulC5mRA== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIwMDAyNCBTYWx0ZWRfXyd9MLnCZYR3X y4peOWZnJDp2Y0T8fDb/nw0Ezjs3VP9gzloivH/XVNDjTg15D6THmgn1N2+c4qSHfRHWYMtZ9AX L9Nblgc9ZH4Wz9cyB3K+4PXXktLvYSw= 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=2026-10-20_01,2026-10-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 adultscore=0 phishscore=0 priorityscore=1501 bulkscore=0 malwarescore=0 suspectscore=0 spamscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610200024 On 10/20/26 4:05 AM, Fabricio Akio via B4 Relay wrote: > From: Fabricio Akio > > On SDM630, SDM660 and MSM8998 the GPU's GX power domain belongs to its > SMMU, not to the GPU, so GX switches off only once the SMMU suspends as > well. This is because the DT part is a huge slop (artisinal free-range grass-fed slop from before AI times which I partook in.. sorry!). The ultimate fix would be to land: https://lore.kernel.org/linux-arm-msm/20261014-topic-qc_clk_dvfs-v1-0-3041b788e9f7@oss.qualcomm.com/ on other SoCs we scrape by with overzealously assigning various power domains, as all of the power requirements are managed by RPM and other pieces of firmware. On msm8996/msm8998/sdm630/660, that requires a long chain of HLOS-programmed values: - VDDCX/MX from RPM - GFX_LDO - MEM_ACC-GFX - CPR3/H-GFX - GPMU on the bigger SoCs I believe Dmitry is working on getting most of that in order and should have something to show in the near future. Konrad