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[67.168.198.145]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3ae6e9426ffsm5548239a91.7.2026.10.29.13.18.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Oct 2026 13:18:22 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, Alexander Koskovich , Jie Zhang , Akhil P Oommen , Bhaskar Reddy Valluru , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v3 11/16] drm/msm: Inhibit IFPC for state snapshot Date: Thu, 29 Oct 2026 13:16:21 -0700 Message-ID: <20261029201730.151754-12-robin.clark@oss.qualcomm.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261029201730.151754-1-robin.clark@oss.qualcomm.com> References: <20261029201730.151754-1-robin.clark@oss.qualcomm.com> 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 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: n0zcREn-JORjqayOFmUkCh0mVafCxGeD X-Proofpoint-GUID: n0zcREn-JORjqayOFmUkCh0mVafCxGeD X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI5MDA3OSBTYWx0ZWRfXynYjKXjH7F/Y pvFLtwIz2GA/2pd/sLswzLrorA+WNPFFR/zjldkN586YlMM+EMGdwwXl2X9r1RKTqI9ytpUABZN xrMhnvBBlDBclb6BCJatPFKM3OJtSI//Au0XIyUroEYpq5a9C3NfwYLkOfCUV5aGSSpfk2OwQ5g P93M0TxI3Yvoa/KTG+ZY1U+YCgUIDhxFSxrIwHpNr6eTyaOYps4dn+305SjlglQLRXa2ZSfoEku uUBHPFDmtBKKy+k1Q3P2nmRRCFnqTpsrIG6tEzYFhGvuObtuCmZWSBHGyPtnUe4X9cqVxw1fEO/ qrH7zQxd2H0NNjD/auCjCIlRmZmBipw0dxwA9RRMxMLgRLTvb7y2ohVLE/TynqS9gC+Dw1naHfG mevv7reKncjqmUG9sFELnkNwiY2LJtLGLwtCsKgAZFZiijTmM9uh89kIv/kAmYHhWE9nM53rFEx JwlwmvxkVbaZn5izLYA== X-Authority-Analysis: v=2.4 cv=It2L47/g c=1 sm=1 tr=0 ts=6ae3aa10 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=6Rn/7xRx7Ub4NEhlm8k1cw==:17 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=eWlSUfSnBrBg5eVjM6UA:9 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI5MDA3OSBTYWx0ZWRfX9szn17KIHHGD EAM95180y8ppejNv3bo2mIkBSrezcm8pOZ2L2Q0FBRn2p0msudlpKuQoB/EP5aCU8VIF3VIJhaz mYfM7qd1pyEReQQQyF1T6oStpt90fR4= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-29_06,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 bulkscore=0 malwarescore=0 adultscore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610290079 We need the GPU to stay awake for this. Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_debugfs.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/gpu/drm/msm/msm_debugfs.c b/drivers/gpu/drm/msm/msm_debugfs.c index f12701e286ec..f068315541e8 100644 --- a/drivers/gpu/drm/msm/msm_debugfs.c +++ b/drivers/gpu/drm/msm/msm_debugfs.c @@ -86,7 +86,17 @@ static int msm_gpu_open(struct inode *inode, struct file *file) pm_runtime_get_sync(&gpu->pdev->dev); msm_gpu_hw_init(gpu); + + /* Inhibit IFPC while accessing registers: */ + if (gpu->funcs->sysprof_setup) + gpu->funcs->sysprof_setup(gpu, true); + show_priv->state = gpu->funcs->gpu_state_get(gpu); + + /* Re-enable IFPC: */ + if (gpu->funcs->sysprof_setup) + gpu->funcs->sysprof_setup(gpu, false); + pm_runtime_put_sync(&gpu->pdev->dev); mutex_unlock(&gpu->lock); -- 2.56.0