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()
44 	pfdevfreq->busy_time = 0;  in panfrost_devfreq_reset()
45 	pfdevfreq->idle_time = 0;  in panfrost_devfreq_reset()
46 	pfdevfreq->time_last_update = ktime_get();  in panfrost_devfreq_reset()
53 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_get_dev_status()
56 	status->current_frequency = clk_get_rate(pfdev->clock);  in panfrost_devfreq_get_dev_status()
58 	spin_lock_irqsave(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_get_dev_status()
62 	status->total_time = ktime_to_ns(ktime_add(pfdevfreq->busy_time,  in panfrost_devfreq_get_dev_status()
63 						   pfdevfreq->idle_time));  in panfrost_devfreq_get_dev_status()
65 	status->busy_time = ktime_to_ns(pfdevfreq->busy_time);  in panfrost_devfreq_get_dev_status()
69 	spin_unlock_irqrestore(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_get_dev_status()
71 	dev_dbg(pfdev->dev, "busy %lu total %lu %lu %% freq %lu MHz\n",  in panfrost_devfreq_get_dev_status()
72 		status->busy_time, status->total_time,  in panfrost_devfreq_get_dev_status()
73 		status->busy_time / (status->total_time / 100),  in panfrost_devfreq_get_dev_status()
74 		status->current_frequency / 1000 / 1000);  in panfrost_devfreq_get_dev_status()
91 	ret = nvmem_cell_read_variable_le_u32(dev, "speed-bin", &val);  in panfrost_read_speedbin()
94 		 * -ENOENT means that this platform doesn't support speedbins  in panfrost_read_speedbin()
95 		 * as it didn't declare any speed-bin nvmem: in this case, we  in panfrost_read_speedbin()
97 		 * supposed to read the bin value, but we failed doing so.  in panfrost_read_speedbin()
99 		if (ret != -ENOENT && ret != -EOPNOTSUPP) {  in panfrost_read_speedbin()
100 			DRM_DEV_ERROR(dev, "Cannot read speed-bin (%d).", ret);  in panfrost_read_speedbin()
106 	DRM_DEV_DEBUG(dev, "Using speed-bin = 0x%x\n", val);  in panfrost_read_speedbin()
116 	struct device *dev = &pfdev->pdev->dev;  in panfrost_devfreq_init()
119 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_init()
121 	if (pfdev->comp->num_supplies > 1) {  in panfrost_devfreq_init()
123 		 * GPUs with more than 1 supply require platform-specific handling:  in panfrost_devfreq_init()
134 	ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names);  in panfrost_devfreq_init()
137 		if (ret != -ENODEV) {  in panfrost_devfreq_init()
138 			if (ret != -EPROBE_DEFER)  in panfrost_devfreq_init()
147 		if (ret == -ENODEV)  in panfrost_devfreq_init()
151 	pfdevfreq->opp_of_table_added = true;  in panfrost_devfreq_init()
153 	spin_lock_init(&pfdevfreq->lock);  in panfrost_devfreq_init()
157 	cur_freq = clk_get_rate(pfdev->clock);  in panfrost_devfreq_init()
181 	pfdevfreq->gov_data.upthreshold = 45;  in panfrost_devfreq_init()
182 	pfdevfreq->gov_data.downdifferential = 5;  in panfrost_devfreq_init()
186 					  &pfdevfreq->gov_data);  in panfrost_devfreq_init()
191 	pfdevfreq->devfreq = devfreq;  in panfrost_devfreq_init()
197 		pfdevfreq->cooling = cooling;  in panfrost_devfreq_init()
204 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_fini()
206 	if (pfdevfreq->cooling) {  in panfrost_devfreq_fini()
207 		devfreq_cooling_unregister(pfdevfreq->cooling);  in panfrost_devfreq_fini()
208 		pfdevfreq->cooling = NULL;  in panfrost_devfreq_fini()
214 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_resume()
216 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_resume()
221 	devfreq_resume_device(pfdevfreq->devfreq);  in panfrost_devfreq_resume()
226 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;  in panfrost_devfreq_suspend()
228 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_suspend()
231 	devfreq_suspend_device(pfdevfreq->devfreq);  in panfrost_devfreq_suspend()
238 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_record_busy()
241 	spin_lock_irqsave(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_busy()
245 	pfdevfreq->busy_count++;  in panfrost_devfreq_record_busy()
247 	spin_unlock_irqrestore(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_busy()
254 	if (!pfdevfreq->devfreq)  in panfrost_devfreq_record_idle()
257 	spin_lock_irqsave(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_idle()
261 	WARN_ON(--pfdevfreq->busy_count < 0);  in panfrost_devfreq_record_idle()
263 	spin_unlock_irqrestore(&pfdevfreq->lock, irqflags);  in panfrost_devfreq_record_idle()