From: Akhil P Oommen <quic_akhilpo@quicinc.com>
Date: Mon, 2 Jan 2023 10:48:30 +0000 (+0530)
Subject: drm/msm/a6xx: Remove cx gdsc polling using 'reset'
X-Git-Tag: v6.6.17~3937^2~4^2~299
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d48430122509955bbf12a02964dc8ec514f66d8c;p=platform%2Fkernel%2Flinux-rpi.git

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.

This effectively reverts commit 1f6cca404918
("drm/msm/a6xx: Ensure CX collapse during gpu recovery").

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Patchwork: https://patchwork.freedesktop.org/patch/516470/
Link: https://lore.kernel.org/r/20230102161757.v5.4.I96e0bf9eaf96dd866111c1eec8a4c9b70fd7cbcb@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>
---

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 6faea50..4e85ef0 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
@@ -1304,9 +1303,6 @@ 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 3802495..54d8659 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>
 
 /*
@@ -935,9 +934,6 @@ 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 fc1c0d8..0d261bb 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"
@@ -281,9 +280,6 @@ 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)