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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-83965945101sm7346557b3a.13.2026.05.06.23.23.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 May 2026 23:23:16 -0700 (PDT) From: Sibi Sankar To: cristian.marussi@arm.com, sudeep.holla@kernel.org, cw00.choi@samsung.com, kyungmin.park@samsung.com, myungjoo.ham@samsung.com, konradybcio@kernel.org, andersson@kernel.org Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, arm-scmi@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, dmitry.baryshkov@oss.qualcomm.com, jonathanh@nvidia.com, thierry.reding@kernel.org, digetx@gmail.com, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org Subject: [RFC V6 4/8] PM / devfreq: Add new track_remote flag for governors Date: Thu, 7 May 2026 11:52:33 +0530 Message-Id: <20260507062237.78051-5-sibi.sankar@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260507062237.78051-1-sibi.sankar@oss.qualcomm.com> References: <20260507062237.78051-1-sibi.sankar@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=P6IKQCAu c=1 sm=1 tr=0 ts=69fc2fd6 cx=c_pps a=WW5sKcV1LcKqjgzy2JUPuA==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=LlpFjwiIyvKxJCA_QE0A:9 a=OpyuDcXvxspvyRM73sMx:22 X-Proofpoint-ORIG-GUID: LVUo8_hllHP2x-WWc-j0TEJ01VrRww7p X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA3MDA2MCBTYWx0ZWRfX4BSGV5Zpjff9 Wz15vX1yBjaTBa7sgvPuZR/jWzC2hAeMHoxPbJXyYBesZNKAkmyJYvw0tifNChtl8tZBwj8LpZc CRwAOO2kZT31Eib27gd34Rew2mxQ7ljYU7/vBSoHw8qooNvM2oz9txEzO7PzclrRnZt4Uc+5+b9 Cf7R9dXaiteO+bGOpuilaegbMXxoB+UiKjClle2ivX5qk/AmvdtHkKjlgeZiRbg0BmF/MDWNBDg 1Vmf60fMfwuTpSV+AQd/LqTyDYQYSej8P3DrX71+gkMsjoXj6dFHaj/rfceD1a2Watym0LDlZ9K v7ZrDPIjK6k8B0gGCpgFrAhzwNTVeHq7dDmd26i5aZB0hcS12SmqRcpls80r+suu1SQrSng/ic1 1qtgc1NLqdj62svf/PZG/KdYZ6K4FhE2QUcNKCLM38qolnAE4eTwkNHf3bSsg+Fsxpg4K9gOhCq MvlzSLaUV3kaV6BpUiw== X-Proofpoint-GUID: LVUo8_hllHP2x-WWc-j0TEJ01VrRww7p X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-06_02,2026-05-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 suspectscore=0 clxscore=1015 bulkscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 adultscore=0 priorityscore=1501 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605070060 Add a new track_remote flag for devfreq governors as a pre-curor to adding the devfreq governors that is responsible for tracking frequency changes on remote devices. This new governor flag provides for a way track the remote device's frequency and keep the trans_stat data updated and skip the frequency update sequency for the device. Signed-off-by: Sibi Sankar --- drivers/devfreq/devfreq.c | 5 +++++ include/linux/devfreq-governor.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 85e937e321e8..e0272078912b 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -348,6 +348,10 @@ static int devfreq_set_target(struct devfreq *devfreq, unsigned long new_freq, unsigned long cur_freq; int err = 0; + /* Frequency already updated, update trans-stat info */ + if (IS_SUPPORTED_FLAG(devfreq->governor->flags, TRACK_REMOTE)) + goto update_status; + if (devfreq->profile->get_cur_freq) devfreq->profile->get_cur_freq(devfreq->dev.parent, &cur_freq); else @@ -375,6 +379,7 @@ static int devfreq_set_target(struct devfreq *devfreq, unsigned long new_freq, freqs.new = new_freq; devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE); +update_status: if (devfreq_update_status(devfreq, new_freq)) dev_warn(&devfreq->dev, "Couldn't update frequency transition information.\n"); diff --git a/include/linux/devfreq-governor.h b/include/linux/devfreq-governor.h index 2853f571dfdf..83aa82c4a9b6 100644 --- a/include/linux/devfreq-governor.h +++ b/include/linux/devfreq-governor.h @@ -36,6 +36,7 @@ */ #define DEVFREQ_GOV_FLAG_IMMUTABLE BIT(0) #define DEVFREQ_GOV_FLAG_IRQ_DRIVEN BIT(1) +#define DEVFREQ_GOV_FLAG_TRACK_REMOTE BIT(2) /* * Definition of governor attribute flags except for common sysfs attributes -- 2.34.1