Merge "drm/msm/sde: set minimum restriction on max_bw_high debugfs" (fdb06bc8) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/gpu/drm/msm/sde/sde_core_perf.c

+66 −3

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
		* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
		*/

		#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__
		@@ -24,6 +24,7 @@
		#include "sde_core_perf.h"

		#define SDE_PERF_MODE_STRING_SIZE 128
		#define SDE_PERF_THRESHOLD_HIGH_MIN 12800000

		static DEFINE_MUTEX(sde_core_perf_lock);

		@@ -977,6 +978,62 @@ void sde_core_perf_crtc_update(struct drm_crtc *crtc,

		#ifdef CONFIG_DEBUG_FS

		static ssize_t _sde_core_perf_threshold_high_write(struct file *file,
		const char __user user_buf, size_t count, loff_t ppos)
		{
		struct sde_core_perf *perf = file->private_data;
		u32 threshold_high = 0;
		char buf[10];

		if (!perf)
		return -ENODEV;

		if (count >= sizeof(buf))
		return -EFAULT;

		if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

		buf[count] = 0; /* end of string */

		if (kstrtouint(buf, 0, &threshold_high))
		return -EFAULT;

		if (threshold_high < SDE_PERF_THRESHOLD_HIGH_MIN)
		threshold_high = SDE_PERF_THRESHOLD_HIGH_MIN;

		perf->catalog->perf.max_bw_high = threshold_high;

		return count;
		}

		static ssize_t _sde_core_perf_threshold_high_read(struct file *file,
		char __user buff, size_t count, loff_t ppos)
		{
		struct sde_core_perf *perf = file->private_data;
		int len = 0;
		char buf[20] = {'\0'};

		if (!perf)
		return -ENODEV;

		if (*ppos)
		return 0; /* the end */

		len = snprintf(buf, sizeof(buf),
		"%d\n", perf->catalog->perf.max_bw_high);

		if (len < 0 \|\| len >= sizeof(buf))
		return 0;

		if ((count < sizeof(buf)) \|\| copy_to_user(buff, buf, len))
		return -EFAULT;

		ppos += len; / increase offset */

		return len;
		}

		static ssize_t _sde_core_perf_mode_write(struct file *file,
		const char __user user_buf, size_t count, loff_t ppos)
		{
		@@ -1050,6 +1107,12 @@ static ssize_t _sde_core_perf_mode_read(struct file *file,
		return len;
		}

		static const struct file_operations sde_core_perf_threshold_high_fops = {
		.open = simple_open,
		.read = _sde_core_perf_threshold_high_read,
		.write = _sde_core_perf_threshold_high_write,
		};

		static const struct file_operations sde_core_perf_mode_fops = {
		.open = simple_open,
		.read = _sde_core_perf_mode_read,
		@@ -1089,8 +1152,8 @@ int sde_core_perf_debugfs_init(struct sde_core_perf *perf,
		&perf->core_clk_rate);
		debugfs_create_u32("threshold_low", 0600, perf->debugfs_root,
		(u32 *)&catalog->perf.max_bw_low);
		debugfs_create_u32("threshold_high", 0600, perf->debugfs_root,
		(u32 *)&catalog->perf.max_bw_high);
		debugfs_create_file("threshold_high", 0600, perf->debugfs_root,
		(u32 *)perf, &sde_core_perf_threshold_high_fops);
		debugfs_create_u32("min_core_ib", 0600, perf->debugfs_root,
		(u32 *)&catalog->perf.min_core_ib);
		debugfs_create_u32("min_llcc_ib", 0600, perf->debugfs_root,