1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/nvmem-consumer.h>
19 	last = pfdevfreq->time_last_update;  in panfrost_devfreq_update_utilization()
21 	if (pfdevfreq->busy_count > 0)  in panfrost_devfreq_update_utilization()
22 		pfdevfreq->busy_time += ktime_sub(now, last);  in panfrost_devfreq_update_utilization()
24 		pfdevfreq->idle_time += ktime_sub(now, last);  in panfrost_devfreq_update_utilization()
26 	pfdevfreq->time_last_update = now;  in panfrost_devfreq_update_utilization()
43 		ptdev->pfdevfreq.current_frequency = *freq;  in panfrost_devfreq_target()
50 	pfdevfreq->busy_time = 0;  in panfrost_devfreq_reset()
51 	pfdevfreq->idle_time = 0;  in panfrost_devfreq_reset()
52 	pfdevfreq->time_last_update = ktime_get();  in panfrost_devfreq_reset()
59 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_get_dev_status()
62 	status->current_frequency = clk_get_rate(pfdev->clock);  in panfrost_devfreq_get_dev_status()
64 	spin_lock_irqsave(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_get_dev_status()
68 	status->total_time = ktime_to_ns(ktime_add(pfdevfreq->busy_time,  in panfrost_devfreq_get_dev_status()
69 						   pfdevfreq->idle_time));  in panfrost_devfreq_get_dev_status()
71 	status->busy_time = ktime_to_ns(pfdevfreq->busy_time);  in panfrost_devfreq_get_dev_status()
75 	spin_unlock_irqrestore(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_get_dev_status()
77 	dev_dbg(pfdev->dev, "busy %lu total %lu %lu %% freq %lu MHz\n",  in panfrost_devfreq_get_dev_status()
78 		status->busy_time, status->total_time,  in panfrost_devfreq_get_dev_status()
79 		status->busy_time / (status->total_time / 100),  in panfrost_devfreq_get_dev_status()
80 		status->current_frequency / 1000 / 1000);  in panfrost_devfreq_get_dev_status()
97 	ret = nvmem_cell_read_variable_le_u32(dev, "speed-bin", &val);  in panfrost_read_speedbin()
100 		 * -ENOENT means that this platform doesn't support speedbins  in panfrost_read_speedbin()
101 		 * as it didn't declare any speed-bin nvmem: in this case, we  in panfrost_read_speedbin()
103 		 * supposed to read the bin value, but we failed doing so.  in panfrost_read_speedbin()
105 		if (ret != -ENOENT && ret != -EOPNOTSUPP) {  in panfrost_read_speedbin()
106 			DRM_DEV_ERROR(dev, "Cannot read speed-bin (%d).", ret);  in panfrost_read_speedbin()
112 	DRM_DEV_DEBUG(dev, "Using speed-bin = 0x%x\n", val);  in panfrost_read_speedbin()
122 	struct device *dev = &pfdev->pdev->dev;  in panfrost_devfreq_init()
125 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_init()
128 	if (pfdev->comp->num_supplies > 1) {  in panfrost_devfreq_init()
130 		 * GPUs with more than 1 supply require platform-specific handling:  in panfrost_devfreq_init()
141 	ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names);  in panfrost_devfreq_init()
144 		if (ret != -ENODEV) {  in panfrost_devfreq_init()
145 			if (ret != -EPROBE_DEFER)  in panfrost_devfreq_init()
154 		if (ret == -ENODEV)  in panfrost_devfreq_init()
158 	pfdevfreq->opp_of_table_added = true;  in panfrost_devfreq_init()
160 	spin_lock_init(&pfdevfreq->lock);  in panfrost_devfreq_init()
164 	cur_freq = clk_get_rate(pfdev->clock);  in panfrost_devfreq_init()
178 	pfdevfreq->current_frequency = cur_freq;  in panfrost_devfreq_init()
194 	pfdevfreq->fast_rate = freq;  in panfrost_devfreq_init()
202 	pfdevfreq->gov_data.upthreshold = 45;  in panfrost_devfreq_init()
203 	pfdevfreq->gov_data.downdifferential = 5;  in panfrost_devfreq_init()
207 					  &pfdevfreq->gov_data);  in panfrost_devfreq_init()
212 	pfdevfreq->devfreq = devfreq;  in panfrost_devfreq_init()
218 		pfdevfreq->cooling = cooling;  in panfrost_devfreq_init()
225 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_fini()
227 	if (pfdevfreq->cooling) {  in panfrost_devfreq_fini()
228 		devfreq_cooling_unregister(pfdevfreq->cooling);  in panfrost_devfreq_fini()
229 		pfdevfreq->cooling = NULL;  in panfrost_devfreq_fini()
235 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_resume()
237 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_resume()
242 	devfreq_resume_device(pfdevfreq->devfreq);  in panfrost_devfreq_resume()
247 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_suspend()
249 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_suspend()
252 	devfreq_suspend_device(pfdevfreq->devfreq);  in panfrost_devfreq_suspend()
259 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_record_busy()
262 	spin_lock_irqsave(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_busy()
266 	pfdevfreq->busy_count++;  in panfrost_devfreq_record_busy()
268 	spin_unlock_irqrestore(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_busy()
275 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_record_idle()
278 	spin_lock_irqsave(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_idle()
282 	WARN_ON(--pfdevfreq->busy_count < 0);  in panfrost_devfreq_record_idle()
284 	spin_unlock_irqrestore(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_idle()