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 1f6cca40
("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@changeidSigned-off-by: Rob Clark <robdclark@chromium.org>

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)

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);
 

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)