linux-kernel - [PATCH 12/17] drm/msm: Skip devfreq IDLE when possible

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250720-ifpc-support-v1-12-9347aa5bcbd6@oss.qualcomm.com>
Date: Sun, 20 Jul 2025 17:46:13 +0530
From: Akhil P Oommen <akhilpo@....qualcomm.com>
To: Rob Clark <robin.clark@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Akhil P Oommen <akhilpo@....qualcomm.com>
Subject: [PATCH 12/17] drm/msm: Skip devfreq IDLE when possible

When IFPC is supported, devfreq idling is redundant and adds
unnecessary pm suspend/wake latency. So skip it when IFPC is
supported.

Signed-off-by: Akhil P Oommen <akhilpo@....qualcomm.com>
---
 drivers/gpu/drm/msm/msm_gpu_devfreq.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
index 2e1d5c3432728cde15d91f69da22bb915588fe86..53ef2add5047e7d6b6371af949cab36ce8409372 100644
--- a/drivers/gpu/drm/msm/msm_gpu_devfreq.c
+++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
@@ -4,6 +4,7 @@
  * Author: Rob Clark <robdclark@...il.com>
  */
 
+#include "adreno/adreno_gpu.h"
 #include "msm_gpu.h"
 #include "msm_gpu_trace.h"
 
@@ -300,6 +301,8 @@ void msm_devfreq_active(struct msm_gpu *gpu)
 	if (!has_devfreq(gpu))
 		return;
 
+	if (to_adreno_gpu(gpu)->info->quirks & ADRENO_QUIRK_IFPC)
+		return;
 	/*
 	 * Cancel any pending transition to idle frequency:
 	 */
@@ -370,6 +373,9 @@ void msm_devfreq_idle(struct msm_gpu *gpu)
 	if (!has_devfreq(gpu))
 		return;
 
+	if (to_adreno_gpu(gpu)->info->quirks & ADRENO_QUIRK_IFPC)
+		return;
+
 	msm_hrtimer_queue_work(&df->idle_work, ms_to_ktime(1),
 			       HRTIMER_MODE_REL);
 }

-- 
2.50.1