3 * (C) COPYRIGHT 2014-2016 ARM Limited. All rights reserved.
5 * This program is free software and is provided to you under the terms of the
6 * GNU General Public License version 2 as published by the Free Software
7 * Foundation, and any use by you of this program is subject to the terms
10 * A copy of the licence is included with the program, and can also be obtained
11 * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
12 * Boston, MA 02110-1301, USA.
17 #define ENABLE_DEBUG_LOG
18 #include "../../platform/rk/custom_log.h"
21 #include <mali_kbase.h>
22 #include <mali_kbase_config_defaults.h>
23 #include <backend/gpu/mali_kbase_pm_internal.h>
24 #ifdef CONFIG_DEVFREQ_THERMAL
25 #include <backend/gpu/mali_kbase_power_model_simple.h>
28 #include <linux/clk.h>
29 #include <linux/devfreq.h>
30 #ifdef CONFIG_DEVFREQ_THERMAL
31 #include <linux/devfreq_cooling.h>
34 #include <linux/version.h>
35 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
36 #include <linux/pm_opp.h>
37 #else /* Linux >= 3.13 */
38 /* In 3.13 the OPP include header file, types, and functions were all
39 * renamed. Use the old filename for the include, and define the new names to
40 * the old, when an old kernel is detected.
42 #include <linux/opp.h>
43 #define dev_pm_opp opp
44 #define dev_pm_opp_get_voltage opp_get_voltage
45 #define dev_pm_opp_get_opp_count opp_get_opp_count
46 #define dev_pm_opp_find_freq_ceil opp_find_freq_ceil
47 #endif /* Linux >= 3.13 */
51 kbase_devfreq_target(struct device *dev, unsigned long *target_freq, u32 flags)
53 struct kbase_device *kbdev = dev_get_drvdata(dev);
54 struct dev_pm_opp *opp;
55 unsigned long freq = 0;
56 unsigned long voltage;
62 opp = devfreq_recommended_opp(dev, &freq, flags);
63 voltage = dev_pm_opp_get_voltage(opp);
65 if (IS_ERR_OR_NULL(opp)) {
66 dev_err(dev, "Failed to get opp (%ld)\n", PTR_ERR(opp));
71 * Only update if there is a change of frequency
73 if (kbdev->current_freq == freq) {
78 #ifdef CONFIG_REGULATOR
79 if (kbdev->regulator && kbdev->current_voltage != voltage
80 && kbdev->current_freq < freq) {
81 err = regulator_set_voltage(kbdev->regulator, voltage, voltage);
83 dev_err(dev, "Failed to increase voltage (%d)\n", err);
89 err = clk_set_rate(kbdev->clock, freq);
91 dev_err(dev, "Failed to set clock %lu (target %lu)\n",
96 #ifdef CONFIG_REGULATOR
97 if (kbdev->regulator && kbdev->current_voltage != voltage
98 && kbdev->current_freq > freq) {
99 err = regulator_set_voltage(kbdev->regulator, voltage, voltage);
101 dev_err(dev, "Failed to decrease voltage (%d)\n", err);
108 kbdev->current_voltage = voltage;
109 kbdev->current_freq = freq;
111 kbase_pm_reset_dvfs_utilisation(kbdev);
117 kbase_devfreq_cur_freq(struct device *dev, unsigned long *freq)
119 struct kbase_device *kbdev = dev_get_drvdata(dev);
121 *freq = kbdev->current_freq;
127 kbase_devfreq_status(struct device *dev, struct devfreq_dev_status *stat)
129 struct kbase_device *kbdev = dev_get_drvdata(dev);
131 stat->current_frequency = kbdev->current_freq;
133 kbase_pm_get_dvfs_utilisation(kbdev,
134 &stat->total_time, &stat->busy_time);
136 stat->private_data = NULL;
138 #ifdef CONFIG_DEVFREQ_THERMAL
139 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
140 if (kbdev->devfreq_cooling)
141 memcpy(&kbdev->devfreq_cooling->last_status, stat,
149 static int kbase_devfreq_init_freq_table(struct kbase_device *kbdev,
150 struct devfreq_dev_profile *dp)
154 unsigned long freq = 0;
155 struct dev_pm_opp *opp;
158 count = dev_pm_opp_get_opp_count(kbdev->dev);
165 dp->freq_table = kmalloc_array(count, sizeof(dp->freq_table[0]),
171 for (i = 0; i < count; i++, freq++) {
172 opp = dev_pm_opp_find_freq_ceil(kbdev->dev, &freq);
176 dp->freq_table[i] = freq;
181 dev_warn(kbdev->dev, "Unable to enumerate all OPPs (%d!=%d\n",
189 static void kbase_devfreq_term_freq_table(struct kbase_device *kbdev)
191 struct devfreq_dev_profile *dp = kbdev->devfreq->profile;
193 kfree(dp->freq_table);
196 static void kbase_devfreq_exit(struct device *dev)
198 struct kbase_device *kbdev = dev_get_drvdata(dev);
200 kbase_devfreq_term_freq_table(kbdev);
203 int kbase_devfreq_init(struct kbase_device *kbdev)
205 struct devfreq_dev_profile *dp;
211 kbdev->current_freq = clk_get_rate(kbdev->clock);
213 dp = &kbdev->devfreq_profile;
215 dp->initial_freq = kbdev->current_freq;
216 /* .KP : set devfreq_dvfs_interval_in_ms */
218 dp->target = kbase_devfreq_target;
219 dp->get_dev_status = kbase_devfreq_status;
220 dp->get_cur_freq = kbase_devfreq_cur_freq;
221 dp->exit = kbase_devfreq_exit;
223 if (kbase_devfreq_init_freq_table(kbdev, dp))
226 kbdev->devfreq = devfreq_add_device(kbdev->dev, dp,
227 "simple_ondemand", NULL);
228 if (IS_ERR(kbdev->devfreq)) {
229 kbase_devfreq_term_freq_table(kbdev);
230 return PTR_ERR(kbdev->devfreq);
233 err = devfreq_register_opp_notifier(kbdev->dev, kbdev->devfreq);
236 "Failed to register OPP notifier (%d)\n", err);
237 goto opp_notifier_failed;
240 #ifdef CONFIG_DEVFREQ_THERMAL
241 err = kbase_power_model_simple_init(kbdev);
242 if (err && err != -ENODEV && err != -EPROBE_DEFER) {
244 "Failed to initialize simple power model (%d)\n",
248 if (err == -EPROBE_DEFER)
250 if (err != -ENODEV) {
251 kbdev->devfreq_cooling = of_devfreq_cooling_register_power(
254 &power_model_simple_ops);
255 if (IS_ERR_OR_NULL(kbdev->devfreq_cooling)) {
256 err = PTR_ERR(kbdev->devfreq_cooling);
258 "Failed to register cooling device (%d)\n",
265 I("success initing power_model_simple.");
270 #ifdef CONFIG_DEVFREQ_THERMAL
272 devfreq_unregister_opp_notifier(kbdev->dev, kbdev->devfreq);
273 #endif /* CONFIG_DEVFREQ_THERMAL */
275 if (devfreq_remove_device(kbdev->devfreq))
276 dev_err(kbdev->dev, "Failed to terminate devfreq (%d)\n", err);
278 kbdev->devfreq = NULL;
283 void kbase_devfreq_term(struct kbase_device *kbdev)
287 dev_dbg(kbdev->dev, "Term Mali devfreq\n");
289 #ifdef CONFIG_DEVFREQ_THERMAL
290 if (kbdev->devfreq_cooling)
291 devfreq_cooling_unregister(kbdev->devfreq_cooling);
294 devfreq_unregister_opp_notifier(kbdev->dev, kbdev->devfreq);
296 err = devfreq_remove_device(kbdev->devfreq);
298 dev_err(kbdev->dev, "Failed to terminate devfreq (%d)\n", err);
300 kbdev->devfreq = NULL;