1 #define pr_fmt(fmt) "ddrfreq: " fmt
6 #include <linux/cpufreq.h>
7 #include <linux/delay.h>
8 #include <linux/freezer.h>
10 #include <linux/kthread.h>
11 #include <linux/miscdevice.h>
12 #include <linux/module.h>
13 #include <linux/reboot.h>
14 #include <linux/slab.h>
15 #include <linux/uaccess.h>
16 #include <linux/sched/rt.h>
19 #include <linux/input.h>
20 #include <asm/cacheflush.h>
21 #include <asm/tlbflush.h>
22 #include <linux/vmalloc.h>
23 #include <linux/rockchip/common.h>
24 #include <linux/rockchip/dvfs.h>
25 #include <dt-bindings/clock/ddr.h>
26 #include <dt-bindings/clock/rk_system_status.h>
28 #include <linux/rockchip/grf.h>
29 #include <linux/rockchip/iomap.h>
30 #include <linux/clk-private.h>
31 #include <linux/rockchip/cpu.h>
32 #include "../../../drivers/clk/rockchip/clk-pd.h"
35 #ifdef CONFIG_CPU_FREQ
36 extern int rockchip_cpufreq_reboot_limit_freq(void);
38 static inline int rockchip_cpufreq_reboot_limit_freq(void) { return 0; }
41 static DECLARE_COMPLETION(ddrfreq_completion);
42 static DEFINE_MUTEX(ddrfreq_mutex);
46 static DECLARE_COMPLETION(vop_req_completion);
49 static struct dvfs_node *clk_cpu_dvfs_node = NULL;
50 static int ddr_boost = 0;
53 static int high_load = 70;
54 static int low_load = 60;
55 static int auto_freq_interval_ms = 20;
56 static long down_rate_delay_ms = 500;
57 static unsigned long *auto_freq_table = NULL;
58 static int cur_freq_index;
59 static int auto_freq_table_size;
60 static unsigned long vop_bandwidth_update_jiffies = 0, vop_bandwidth = 0;
61 static int vop_bandwidth_update_flag = 0;
62 static struct ddr_bw_info ddr_bw_ch0 = {0}, ddr_bw_ch1 = {0};
66 DEBUG_VIDEO_STATE = 1U << 1,
67 DEBUG_SUSPEND = 1U << 2,
68 DEBUG_VERBOSE = 1U << 3,
70 static int debug_mask = DEBUG_DDR;
72 module_param(debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
73 #define dprintk(mask, fmt, ...) do { if (mask & debug_mask) pr_debug(fmt, ##__VA_ARGS__); } while (0)
75 #define MHZ (1000*1000)
85 struct list_head node;
89 struct dvfs_node *clk_dvfs_node;
90 struct list_head video_info_list;
91 unsigned long normal_rate;
92 unsigned long video_1080p_rate;
93 unsigned long video_4k_rate;
94 unsigned long performance_rate;
95 unsigned long dualview_rate;
96 unsigned long hdmi_rate;
97 unsigned long idle_rate;
98 unsigned long suspend_rate;
99 unsigned long reboot_rate;
100 unsigned long boost_rate;
101 unsigned long isp_rate;
103 bool auto_self_refresh;
105 unsigned long sys_status;
106 struct task_struct *task;
107 wait_queue_head_t wait;
109 static struct ddr ddr;
111 module_param_named(sys_status, ddr.sys_status, ulong, S_IRUGO);
112 module_param_named(auto_self_refresh, ddr.auto_self_refresh, bool, S_IRUGO);
113 module_param_named(mode, ddr.mode, charp, S_IRUGO);
115 static unsigned long auto_freq_round(unsigned long freq)
119 if (!auto_freq_table)
122 for (i = 0; auto_freq_table[i] != 0; i++) {
123 if (auto_freq_table[i] >= freq) {
124 return auto_freq_table[i];
128 return auto_freq_table[i-1];
131 static unsigned long auto_freq_get_index(unsigned long freq)
135 if (!auto_freq_table)
138 for (i = 0; auto_freq_table[i] != 0; i++) {
139 if (auto_freq_table[i] >= freq) {
146 static unsigned int auto_freq_update_index(unsigned long freq)
148 cur_freq_index = auto_freq_get_index(freq);
150 return cur_freq_index;
154 static unsigned long auto_freq_get_next_step(void)
156 if (cur_freq_index < auto_freq_table_size-1) {
157 return auto_freq_table[cur_freq_index+1];
160 return auto_freq_table[cur_freq_index];
163 static void ddrfreq_mode(bool auto_self_refresh, unsigned long target_rate, char *name)
165 unsigned int min_rate, max_rate;
169 if (auto_self_refresh != ddr.auto_self_refresh) {
170 ddr_set_auto_self_refresh(auto_self_refresh);
171 ddr.auto_self_refresh = auto_self_refresh;
172 dprintk(DEBUG_DDR, "change auto self refresh to %d when %s\n", auto_self_refresh, name);
175 if (target_rate != dvfs_clk_get_last_set_rate(ddr.clk_dvfs_node)) {
176 freq_limit_en = dvfs_clk_get_limit(clk_cpu_dvfs_node, &min_rate, &max_rate);
178 dvfs_clk_enable_limit(clk_cpu_dvfs_node, 600000000, -1);
179 if (dvfs_clk_set_rate(ddr.clk_dvfs_node, target_rate) == 0) {
180 target_rate = dvfs_clk_get_rate(ddr.clk_dvfs_node);
181 auto_freq_update_index(target_rate);
182 dprintk(DEBUG_DDR, "change freq to %lu MHz when %s\n", target_rate / MHZ, name);
186 dvfs_clk_enable_limit(clk_cpu_dvfs_node, min_rate, max_rate);
188 dvfs_clk_disable_limit(clk_cpu_dvfs_node);
193 unsigned long req_freq_by_vop(unsigned long bandwidth)
195 if (time_after(jiffies, vop_bandwidth_update_jiffies+down_rate_delay_ms))
198 if (bandwidth >= 5000){
202 if (bandwidth >= 3500) {
206 if (bandwidth >= 2600) {
209 if (bandwidth >= 2000) {
216 static void ddr_auto_freq(void)
218 unsigned long freq, new_freq=0, vop_req_freq=0, total_bw_req_freq=0;
219 u32 ddr_percent, target_load;
220 static u32 local_jiffies=0, max_ddr_percent=0;
223 local_jiffies = jiffies;
224 freq = dvfs_clk_get_rate(ddr.clk_dvfs_node);
226 ddr_bandwidth_get(&ddr_bw_ch0, &ddr_bw_ch1);
227 ddr_percent = ddr_bw_ch0.ddr_percent;
229 if ((watch)||(print)) {
230 if((watch == 2)&& (ddr_bw_ch0.ddr_percent < max_ddr_percent)) {
232 } else if(watch == 2) {
233 max_ddr_percent = ddr_bw_ch0.ddr_percent;
235 printk("Unit:MB/s total use%% rd wr cpum gpu peri video vio0 vio1 vio2\n");
236 printk("%3u(ms): %5u %5u %5u %5u %5u %5u %5u %5u %5u %5u %5u\n",
238 ddr_bw_ch0.ddr_total,
239 ddr_bw_ch0.ddr_percent,
256 new_freq = max(ddr.boost_rate, new_freq);
259 if(ddr_percent > high_load){
260 total_bw_req_freq = auto_freq_get_next_step();
261 } else if (ddr_percent < low_load){
262 target_load = (low_load+high_load)/2;
263 total_bw_req_freq = ddr_percent*(freq/target_load);
265 new_freq = max(total_bw_req_freq, new_freq);
267 vop_req_freq = req_freq_by_vop(vop_bandwidth);
268 new_freq = max(vop_req_freq, new_freq);
270 new_freq = auto_freq_round(new_freq);
272 if (new_freq < freq) {
273 if (time_after(jiffies, local_jiffies+down_rate_delay_ms/10)) {
274 local_jiffies = jiffies;
275 ddrfreq_mode(false, new_freq, "auto down rate");
277 } else if(new_freq > freq){
278 local_jiffies = jiffies;
279 ddrfreq_mode(false, new_freq, "auto up rate");
283 static noinline long ddrfreq_work(unsigned long sys_status)
285 long timeout = MAX_SCHEDULE_TIMEOUT;
286 unsigned long target_rate = 0;
287 unsigned long s = sys_status;
288 bool auto_self_refresh = false;
291 dprintk(DEBUG_VERBOSE, "sys_status %02lx\n", sys_status);
293 if (ddr.reboot_rate && (s & SYS_STATUS_REBOOT)) {
294 ddrfreq_mode(false, ddr.reboot_rate, "shutdown/reboot");
299 if (ddr.suspend_rate && (s & SYS_STATUS_SUSPEND)) {
300 if (ddr.suspend_rate > target_rate) {
301 target_rate = ddr.suspend_rate;
302 auto_self_refresh = true;
307 if (ddr.performance_rate && (s & SYS_STATUS_PERFORMANCE)) {
308 if (ddr.performance_rate > target_rate) {
309 target_rate = ddr.performance_rate;
310 auto_self_refresh = false;
311 mode = "performance";
315 if (ddr.dualview_rate &&
316 (s & SYS_STATUS_LCDC0) && (s & SYS_STATUS_LCDC1)) {
317 if (ddr.dualview_rate > target_rate) {
318 target_rate = ddr.dualview_rate;
319 auto_self_refresh = false;
325 (s & SYS_STATUS_HDMI)) {
326 if (ddr.hdmi_rate > target_rate) {
327 target_rate = ddr.hdmi_rate;
328 auto_self_refresh = false;
333 if (ddr.video_4k_rate && (s & SYS_STATUS_VIDEO_4K) && !(s & SYS_STATUS_SUSPEND)) {
334 if (ddr.video_4k_rate > target_rate) {
335 target_rate = ddr.video_4k_rate;
336 auto_self_refresh = false;
341 if (ddr.video_1080p_rate && (s & SYS_STATUS_VIDEO_1080P)) {
342 if (ddr.video_1080p_rate > target_rate) {
343 target_rate = ddr.video_1080p_rate;
344 auto_self_refresh = false;
345 mode = "video_1080p";
349 if (ddr.isp_rate && (s & SYS_STATUS_ISP)) {
350 if (ddr.isp_rate > target_rate) {
351 target_rate = ddr.isp_rate;
352 auto_self_refresh = false;
357 if (target_rate > 0) {
358 ddrfreq_mode(auto_self_refresh, target_rate, mode);
362 timeout = auto_freq_interval_ms/10;
365 ddrfreq_mode(false, ddr.normal_rate, "normal");
372 if (ddr.reboot_rate && (s & SYS_STATUS_REBOOT)) {
373 ddrfreq_mode(false, &ddr.reboot_rate, "shutdown/reboot");
374 rockchip_cpufreq_reboot_limit_freq();
375 reboot_config_done = 1;
376 } else if (ddr.suspend_rate && (s & SYS_STATUS_SUSPEND)) {
377 ddrfreq_mode(true, &ddr.suspend_rate, "suspend");
378 } else if (ddr.dualview_rate &&
379 (s & SYS_STATUS_LCDC0) && (s & SYS_STATUS_LCDC1)) {
380 ddrfreq_mode(false, &ddr.dualview_rate, "dual-view");
381 } else if (ddr.video_1080p_rate && (s & SYS_STATUS_VIDEO_1080P)) {
382 ddrfreq_mode(false, &ddr.video_1080p_rate, "video_1080p");
383 } else if (ddr.video_4k_rate && (s & SYS_STATUS_VIDEO_4K)) {
384 ddrfreq_mode(false, &ddr.video_4k_rate, "video_4k");
385 } else if (ddr.performance_rate && (s & SYS_STATUS_PERFORMANCE)) {
386 ddrfreq_mode(false, &ddr.performance_rate, "performance");
387 } else if (ddr.isp_rate && (s & SYS_STATUS_ISP)) {
388 ddrfreq_mode(false, &ddr.isp_rate, "isp");
389 } else if (ddr.idle_rate
390 && !(s & SYS_STATUS_GPU)
391 && !(s & SYS_STATUS_RGA)
392 && !(s & SYS_STATUS_CIF0)
393 && !(s & SYS_STATUS_CIF1)
394 && (clk_get_rate(cpu) < 816 * MHZ)
395 && (clk_get_rate(gpu) <= 200 * MHZ)
397 ddrfreq_mode(false, &ddr.idle_rate, "idle");
401 timeout = auto_freq_interval_ms;
404 ddrfreq_mode(false, &ddr.normal_rate, "normal");
414 static int ddrfreq_task(void *data)
417 unsigned long status=ddr.sys_status, old_status=ddr.sys_status;
422 status = ddr.sys_status;
423 if (vop_bandwidth_update_flag) {
424 vop_bandwidth_update_flag = 0;
426 complete(&vop_req_completion);
430 timeout = ddrfreq_work(status);
431 if (old_status != status) {
432 complete(&ddrfreq_completion);
434 wait_event_freezable_timeout(ddr.wait, vop_bandwidth_update_flag || (status != ddr.sys_status) || kthread_should_stop(), timeout);
436 } while (!kthread_should_stop());
441 void add_video_info(struct video_info *video_info)
444 list_add(&video_info->node, &ddr.video_info_list);
447 void del_video_info(struct video_info *video_info)
450 list_del(&video_info->node);
455 void clear_video_info(void)
457 struct video_info *video_info, *next;
459 list_for_each_entry_safe(video_info, next, &ddr.video_info_list, node) {
460 del_video_info(video_info);
464 struct video_info *find_video_info(struct video_info *match_video_info)
466 struct video_info *video_info;
468 if (!match_video_info)
471 list_for_each_entry(video_info, &ddr.video_info_list, node) {
472 if ((video_info->width == match_video_info->width)
473 && (video_info->height == match_video_info->height)
474 && (video_info->ishevc== match_video_info->ishevc)
475 && (video_info->videoFramerate == match_video_info->videoFramerate)
476 && (video_info->streamBitrate== match_video_info->streamBitrate)) {
486 void update_video_info(void)
488 struct video_info *video_info, *max_res_video;
489 int max_res=0, res=0;
491 if (list_empty(&ddr.video_info_list)) {
492 rockchip_clear_system_status(SYS_STATUS_VIDEO_1080P|SYS_STATUS_VIDEO_4K);
496 list_for_each_entry(video_info, &ddr.video_info_list, node) {
497 res = video_info->width * video_info->height;
500 max_res_video = video_info;
504 if (max_res <= 1920*1080)
505 rockchip_set_system_status(SYS_STATUS_VIDEO_1080P);
507 rockchip_set_system_status(SYS_STATUS_VIDEO_4K);
512 /***format: width=val,height=val,ishevc=val,videoFramerate=val,streamBitrate=val***/
513 static long get_video_param(char **str)
520 return simple_strtol(p,NULL,10);
525 static ssize_t video_state_write(struct file *file, const char __user *buffer,
526 size_t count, loff_t *ppos)
528 struct video_info *video_info = NULL;
529 char state, *cookie_pot, *buf = vzalloc(count);
540 if (copy_from_user(cookie_pot, buffer, count)) {
545 dprintk(DEBUG_VIDEO_STATE, "%s: %s,len %d\n", __func__, cookie_pot,count);
548 if( (count>=3) && (cookie_pot[2]=='w') )
550 video_info = kzalloc(sizeof(struct video_info), GFP_KERNEL);
555 INIT_LIST_HEAD(&video_info->node);
557 strsep(&cookie_pot,",");
559 video_info->width = get_video_param(&cookie_pot);
560 video_info->height = get_video_param(&cookie_pot);
561 video_info->ishevc = get_video_param(&cookie_pot);
562 video_info->videoFramerate = get_video_param(&cookie_pot);
563 video_info->streamBitrate = get_video_param(&cookie_pot);
565 dprintk(DEBUG_VIDEO_STATE, "%s: video_state=%c,width=%d,height=%d,ishevc=%d,videoFramerate=%d,streamBitrate=%d\n",
566 __func__, state,video_info->width,video_info->height,
567 video_info->ishevc, video_info->videoFramerate,
568 video_info->streamBitrate);
573 del_video_info(find_video_info(video_info));
578 add_video_info(video_info);
581 case 'p'://performance
582 rockchip_set_system_status(SYS_STATUS_PERFORMANCE);
585 rockchip_clear_system_status(SYS_STATUS_PERFORMANCE);
597 static int video_state_release(struct inode *inode, struct file *file)
599 dprintk(DEBUG_VIDEO_STATE, "video_state release\n");
606 static const struct file_operations video_state_fops = {
607 .owner = THIS_MODULE,
608 .release= video_state_release,
609 .write = video_state_write,
612 static struct miscdevice video_state_dev = {
613 .fops = &video_state_fops,
614 .name = "video_state",
615 .minor = MISC_DYNAMIC_MINOR,
618 static long ddr_freq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
620 unsigned long bandwidth = *(int*)arg;
621 unsigned long vop_req_freq;
624 vop_bandwidth = bandwidth;
625 vop_bandwidth_update_jiffies = jiffies;
626 vop_req_freq = req_freq_by_vop(bandwidth);
627 if (dvfs_clk_get_rate(ddr.clk_dvfs_node) >= vop_req_freq) {
631 vop_bandwidth_update_flag = 1;
634 wait_for_completion(&vop_req_completion);
641 static const struct file_operations ddr_freq_fops = {
642 .owner = THIS_MODULE,
643 .unlocked_ioctl = ddr_freq_ioctl,
646 static struct miscdevice ddr_freq_dev = {
647 .fops = &ddr_freq_fops,
649 .mode = S_IRUGO | S_IWUSR | S_IWUGO,
650 .minor = MISC_DYNAMIC_MINOR,
654 static void ddr_freq_input_event(struct input_handle *handle, unsigned int type,
655 unsigned int code, int value)
661 static int ddr_freq_input_connect(struct input_handler *handler,
662 struct input_dev *dev, const struct input_device_id *id)
664 struct input_handle *handle;
667 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
672 handle->handler = handler;
673 handle->name = "ddr_freq";
675 error = input_register_handle(handle);
679 error = input_open_device(handle);
685 input_unregister_handle(handle);
691 static void ddr_freq_input_disconnect(struct input_handle *handle)
693 input_close_device(handle);
694 input_unregister_handle(handle);
698 static const struct input_device_id ddr_freq_ids[] = {
700 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
701 INPUT_DEVICE_ID_MATCH_ABSBIT,
702 .evbit = { BIT_MASK(EV_ABS) },
703 .absbit = { [BIT_WORD(ABS_MT_POSITION_X)] =
704 BIT_MASK(ABS_MT_POSITION_X) |
705 BIT_MASK(ABS_MT_POSITION_Y) },
708 .flags = INPUT_DEVICE_ID_MATCH_KEYBIT |
709 INPUT_DEVICE_ID_MATCH_ABSBIT,
710 .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
711 .absbit = { [BIT_WORD(ABS_X)] =
712 BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) },
715 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
716 .evbit = { BIT_MASK(EV_KEY) },
721 static struct input_handler ddr_freq_input_handler = {
722 .event = ddr_freq_input_event,
723 .connect = ddr_freq_input_connect,
724 .disconnect = ddr_freq_input_disconnect,
726 .id_table = ddr_freq_ids,
730 static int ddrfreq_clk_event(int status, unsigned long event)
733 case RK_CLK_PD_PREPARE:
734 ddrfreq_set_sys_status(status);
736 case RK_CLK_PD_UNPREPARE:
737 ddrfreq_clear_sys_status(status);
743 #define CLK_NOTIFIER(name, status) \
744 static int ddrfreq_clk_##name##_event(struct notifier_block *this, unsigned long event, void *ptr) \
746 return ddrfreq_clk_event(SYS_STATUS_##status, event); \
748 static struct notifier_block ddrfreq_clk_##name##_notifier = { .notifier_call = ddrfreq_clk_##name##_event };
750 #define REGISTER_CLK_NOTIFIER(name) \
752 struct clk *clk = clk_get(NULL, #name); \
753 rk_clk_pd_notifier_register(clk, &ddrfreq_clk_##name##_notifier); \
757 #define UNREGISTER_CLK_NOTIFIER(name) \
759 struct clk *clk = clk_get(NULL, #name); \
760 rk_clk_pd_notifier_unregister(clk, &ddrfreq_clk_##name##_notifier); \
764 CLK_NOTIFIER(pd_isp, ISP)
765 CLK_NOTIFIER(pd_vop0, LCDC0)
766 CLK_NOTIFIER(pd_vop1, LCDC1)
769 static int ddrfreq_reboot_notifier_event(struct notifier_block *this, unsigned long event, void *ptr)
771 rockchip_set_system_status(SYS_STATUS_REBOOT);
772 rockchip_cpufreq_reboot_limit_freq();
777 static struct notifier_block ddrfreq_reboot_notifier = {
778 .notifier_call = ddrfreq_reboot_notifier_event,
781 static int ddr_freq_suspend_notifier_call(struct notifier_block *self,
782 unsigned long action, void *data)
784 struct fb_event *event = data;
785 int blank_mode = *((int *)event->data);
787 if (action == FB_EARLY_EVENT_BLANK) {
788 switch (blank_mode) {
789 case FB_BLANK_UNBLANK:
790 rockchip_clear_system_status(SYS_STATUS_SUSPEND);
796 else if (action == FB_EVENT_BLANK) {
797 switch (blank_mode) {
798 case FB_BLANK_POWERDOWN:
799 rockchip_set_system_status(SYS_STATUS_SUSPEND);
809 static struct notifier_block ddr_freq_suspend_notifier = {
810 .notifier_call = ddr_freq_suspend_notifier_call,
813 static int ddrfreq_system_status_notifier_call(struct notifier_block *nb,
814 unsigned long val, void *data)
816 mutex_lock(&ddrfreq_mutex);
817 ddr.sys_status = val;
819 wait_for_completion(&ddrfreq_completion);
820 mutex_unlock(&ddrfreq_mutex);
825 static struct notifier_block ddrfreq_system_status_notifier = {
826 .notifier_call = ddrfreq_system_status_notifier_call,
830 int of_init_ddr_freq_table(void)
832 struct device_node *clk_ddr_dev_node;
833 const struct property *prop;
837 clk_ddr_dev_node = of_find_node_by_name(NULL, "clk_ddr");
838 if (IS_ERR_OR_NULL(clk_ddr_dev_node)) {
839 pr_err("%s: get clk ddr dev node err\n", __func__);
840 return PTR_ERR(clk_ddr_dev_node);
843 prop = of_find_property(clk_ddr_dev_node, "auto-freq", NULL);
844 if (prop && prop->value)
845 ddr.auto_freq = be32_to_cpup(prop->value);
847 prop = of_find_property(clk_ddr_dev_node, "auto-freq-table", NULL);
848 if (prop && prop->value) {
849 nr = prop->length / sizeof(u32);
850 auto_freq_table = kzalloc((sizeof(u32) *(nr+1)), GFP_KERNEL);
853 auto_freq_table[i++] =
854 dvfs_clk_round_rate(ddr.clk_dvfs_node, 1000 * be32_to_cpup(val++));
858 auto_freq_table_size = i;
861 prop = of_find_property(clk_ddr_dev_node, "freq-table", NULL);
867 nr = prop->length / sizeof(u32);
869 pr_err("%s: Invalid freq list\n", __func__);
875 unsigned long status = be32_to_cpup(val++);
877 dvfs_clk_round_rate(ddr.clk_dvfs_node, be32_to_cpup(val++) * 1000);
879 if (status & SYS_STATUS_NORMAL)
880 ddr.normal_rate = rate;
881 if (status & SYS_STATUS_SUSPEND)
882 ddr.suspend_rate = rate;
883 if (status & SYS_STATUS_VIDEO_1080P)
884 ddr.video_1080p_rate = rate;
885 if (status & SYS_STATUS_VIDEO_4K)
886 ddr.video_4k_rate = rate;
887 if (status & SYS_STATUS_PERFORMANCE)
888 ddr.performance_rate= rate;
889 if ((status & SYS_STATUS_LCDC0)&&(status & SYS_STATUS_LCDC1))
890 ddr.dualview_rate = rate;
891 if (status & SYS_STATUS_HDMI)
892 ddr.hdmi_rate = rate;
893 if (status & SYS_STATUS_IDLE)
895 if (status & SYS_STATUS_REBOOT)
896 ddr.reboot_rate= rate;
897 if (status & SYS_STATUS_BOOST)
898 ddr.boost_rate= rate;
899 if (status & SYS_STATUS_ISP)
908 static int ddrfreq_scale_rate_for_dvfs(struct clk *clk, unsigned long rate)
910 unsigned long real_rate;
912 real_rate = ddr_change_freq(rate/MHZ);
916 if (cpu_is_rk312x()) {
917 clk->parent->rate = 2 * real_rate;
918 clk->rate = real_rate;
920 clk->rate = real_rate;
921 clk->parent->rate = real_rate;
927 #if defined(CONFIG_RK_PM_TESTS)
928 static void ddrfreq_tst_init(void);
931 static int ddrfreq_init(void)
934 struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
936 #if defined(CONFIG_RK_PM_TESTS)
940 clk_cpu_dvfs_node = clk_get_dvfs_node("clk_core");
941 if (!clk_cpu_dvfs_node){
945 memset(&ddr, 0x00, sizeof(ddr));
946 ddr.clk_dvfs_node = clk_get_dvfs_node("clk_ddr");
947 if (!ddr.clk_dvfs_node){
950 clk_enable_dvfs(ddr.clk_dvfs_node);
952 dvfs_clk_register_set_rate_callback(ddr.clk_dvfs_node, ddrfreq_scale_rate_for_dvfs);
954 init_waitqueue_head(&ddr.wait);
955 INIT_LIST_HEAD(&ddr.video_info_list);
957 ddr.normal_rate = dvfs_clk_get_rate(ddr.clk_dvfs_node);
958 ddr.sys_status = rockchip_get_system_status();
960 of_init_ddr_freq_table();
962 if (!ddr.reboot_rate)
963 ddr.reboot_rate = ddr.normal_rate;
966 ret = input_register_handler(&ddr_freq_input_handler);
968 ddr.auto_freq = false;
971 //REGISTER_CLK_NOTIFIER(pd_isp);
972 //REGISTER_CLK_NOTIFIER(pd_vop0);
973 //REGISTER_CLK_NOTIFIER(pd_vop1);
975 ret = misc_register(&video_state_dev);
976 ret = misc_register(&ddr_freq_dev);
978 pr_err("failed to register video_state misc device! error %d\n", ret);
982 ddr.task = kthread_create(ddrfreq_task, NULL, "ddrfreqd");
983 if (IS_ERR(ddr.task)) {
984 ret = PTR_ERR(ddr.task);
985 pr_err("failed to create kthread! error %d\n", ret);
989 sched_setscheduler_nocheck(ddr.task, SCHED_FIFO, ¶m);
990 get_task_struct(ddr.task);
991 kthread_bind(ddr.task, 0);
992 wake_up_process(ddr.task);
994 rockchip_register_system_status_notifier(&ddrfreq_system_status_notifier);
995 fb_register_client(&ddr_freq_suspend_notifier);
996 register_reboot_notifier(&ddrfreq_reboot_notifier);
998 pr_info("verion 1.2 20140526\n");
999 pr_info("normal %luMHz video_1080p %luMHz video_4k %luMHz dualview %luMHz idle %luMHz suspend %luMHz reboot %luMHz\n",
1000 ddr.normal_rate / MHZ,
1001 ddr.video_1080p_rate / MHZ,
1002 ddr.video_4k_rate / MHZ,
1003 ddr.dualview_rate / MHZ,
1004 ddr.idle_rate / MHZ,
1005 ddr.suspend_rate / MHZ,
1006 ddr.reboot_rate / MHZ);
1008 pr_info("auto-freq=%d\n", ddr.auto_freq);
1009 if (auto_freq_table) {
1010 for (i = 0; i < auto_freq_table_size; i++) {
1011 pr_info("auto-freq-table[%d] %luMHz\n", i, auto_freq_table[i] / MHZ);
1014 pr_info("auto-freq-table epmty!\n");
1019 misc_deregister(&video_state_dev);
1023 late_initcall(ddrfreq_init);
1024 /****************************ddr bandwith tst************************************/
1025 #if defined(CONFIG_RK_PM_TESTS)
1026 static ssize_t ddrbw_dyn_show(struct kobject *kobj, struct kobj_attribute *attr,
1030 str += sprintf(str, "print: %d\n", print);
1031 str += sprintf(str, "watch: %d\n", watch);
1032 str += sprintf(str, "high_load: %d\n", high_load);
1033 str += sprintf(str, "low_load: %d\n", low_load);
1034 str += sprintf(str, "auto_freq_interval_ms: %d\n", auto_freq_interval_ms);
1035 str += sprintf(str, "down_rate_delay_ms: %ld\n", down_rate_delay_ms);
1036 // str += sprintf(str, "low_load_last_ms: %d\n", low_load_last_ms);
1042 static ssize_t ddrbw_dyn_store(struct kobject *kobj, struct kobj_attribute *attr,
1043 const char *buf, size_t n)
1048 sscanf(buf, "%s %u", var_name, &value);
1050 if((strncmp(buf, "print", strlen("print")) == 0)) {
1052 } else if((strncmp(buf, "watch", strlen("watch")) == 0)) {
1054 } else if((strncmp(buf, "high", strlen("high")) == 0)) {
1056 } else if((strncmp(buf, "low", strlen("low")) == 0)) {
1058 } else if((strncmp(buf, "interval", strlen("interval")) == 0)) {
1059 auto_freq_interval_ms = value;
1060 } else if((strncmp(buf, "downdelay", strlen("downdelay")) == 0)) {
1061 down_rate_delay_ms = value;
1066 struct ddrfreq_attribute {
1067 struct attribute attr;
1068 ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr,
1070 ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,
1071 const char *buf, size_t n);
1074 static struct ddrfreq_attribute ddrfreq_attrs[] = {
1075 /* node_name permision show_func store_func */
1076 __ATTR(ddrfreq, S_IRUSR|S_IRGRP|S_IWUSR, ddrbw_dyn_show, ddrbw_dyn_store),
1078 int rk_pm_tests_kobj_atrradd(const struct attribute *attr);
1080 static void ddrfreq_tst_init(void)
1084 ret = rk_pm_tests_kobj_atrradd(&ddrfreq_attrs[0].attr);
1087 printk("%s: create ddrfreq sysfs node error, ret: %d\n", __func__, ret);