linux-kernel - [PATCH 4/5] drm/msm/a6xx: Remove cx gdsc polling using 'reset'

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]

Date:   Thu, 15 Dec 2022 20:41:00 +0530
From:   Akhil P Oommen <quic_akhilpo@...cinc.com>
To:     freedreno <freedreno@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>
CC:     Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Douglas Anderson <dianders@...omium.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sean Paul <sean@...rly.run>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/5] drm/msm/a6xx: Remove cx gdsc polling using 'reset'

Remove the unused 'reset' interface which was supposed to help to ensure
that cx gdsc has collapsed during gpu recovery. This is was not enabled
so far due to missing gpucc driver support. Similar functionality using
genpd framework will be implemented in the upcoming patch.

Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
---

 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 ----
 drivers/gpu/drm/msm/msm_gpu.c         | 4 ----
 drivers/gpu/drm/msm/msm_gpu.h         | 4 ----
 3 files changed, 12 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 36c8fb699b56..4b16e75dfa50 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -10,7 +10,6 @@
 
 #include <linux/bitfield.h>
 #include <linux/devfreq.h>
-#include <linux/reset.h>
 #include <linux/soc/qcom/llcc-qcom.h>
 
 #define GPU_PAS_ID 13
@@ -1298,9 +1297,6 @@ static void a6xx_recover(struct msm_gpu *gpu)
 	/* And the final one from recover worker */
 	pm_runtime_put_sync(&gpu->pdev->dev);
 
-	/* Call into gpucc driver to poll for cx gdsc collapse */
-	reset_control_reset(gpu->cx_collapse);
-
 	pm_runtime_use_autosuspend(&gpu->pdev->dev);
 
 	if (active_submits)
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 30ed45af76ad..97e1319d4577 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -16,7 +16,6 @@
 #include <generated/utsrelease.h>
 #include <linux/string_helpers.h>
 #include <linux/devcoredump.h>
-#include <linux/reset.h>
 #include <linux/sched/task.h>
 
 /*
@@ -933,9 +932,6 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 	if (IS_ERR(gpu->gpu_cx))
 		gpu->gpu_cx = NULL;
 
-	gpu->cx_collapse = devm_reset_control_get_optional_exclusive(&pdev->dev,
-			"cx_collapse");
-
 	gpu->pdev = pdev;
 	platform_set_drvdata(pdev, &gpu->adreno_smmu);
 
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 651786bc55e5..fa9e34d02c91 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -13,7 +13,6 @@
 #include <linux/interconnect.h>
 #include <linux/pm_opp.h>
 #include <linux/regulator/consumer.h>
-#include <linux/reset.h>
 
 #include "msm_drv.h"
 #include "msm_fence.h"
@@ -282,9 +281,6 @@ struct msm_gpu {
 	bool hw_apriv;
 
 	struct thermal_cooling_device *cooling;
-
-	/* To poll for cx gdsc collapse during gpu recovery */
-	struct reset_control *cx_collapse;
 };
 
 static inline struct msm_gpu *dev_to_gpu(struct device *dev)
-- 
2.7.4