49 int gpu_freq_init(struct gpu_freq *gf)  in gpu_freq_init()  argument
54 	memset(gf, 0, sizeof(*gf));  in gpu_freq_init()
56 	gf->fd = perf_open();  in gpu_freq_init()
65 		return gf->error = errno;  in gpu_freq_init()
76 		gf->is_byt = 1;  in gpu_freq_init()
80 			sscanf(s, "max GPU freq: %d MHz", &gf->max);  in gpu_freq_init()
84 			sscanf(s, "min GPU freq: %d MHz", &gf->min);  in gpu_freq_init()
86 		gf->rp0 = gf->rp1 = gf->max;  in gpu_freq_init()
87 		gf->rpn = gf->min;  in gpu_freq_init()
92 		sscanf(s, "(RPN) frequency: %dMHz", &gf->rpn);  in gpu_freq_init()
97 		sscanf(s, "(RP1) frequency: %dMHz", &gf->rp1);  in gpu_freq_init()
102 		sscanf(s, "(RP0) frequency: %dMHz", &gf->rp0);  in gpu_freq_init()
107 		sscanf(s, "Max overclocked frequency: %dMHz", &gf->max);  in gpu_freq_init()
108 		gf->min = gf->rpn;  in gpu_freq_init()
114 	return gf->error = EIO;  in gpu_freq_init()
117 int gpu_freq_update(struct gpu_freq *gf)  in gpu_freq_update()  argument
119 	if (gf->error)  in gpu_freq_update()
120 		return gf->error;  in gpu_freq_update()
122 	if (gf->fd < 0) {  in gpu_freq_update()
133 			return gf->error = errno;  in gpu_freq_update()
138 			return gf->error = EIO;  in gpu_freq_update()
142 		if (gf->is_byt) {  in gpu_freq_update()
145 				sscanf(s, "current GPU freq: %d MHz", &gf->current);  in gpu_freq_update()
146 			gf->request = gf->current;  in gpu_freq_update()
150 				sscanf(s, "RPNSWREQ: %dMHz", &gf->request);  in gpu_freq_update()
154 				sscanf(s, "CAGF: %dMHz", &gf->current);  in gpu_freq_update()
157 		struct gpu_freq_stat *s = &gf->stat[gf->count++&1];  in gpu_freq_update()
158 		struct gpu_freq_stat *d = &gf->stat[gf->count&1];  in gpu_freq_update()
162 		len = read(gf->fd, data, sizeof(data));  in gpu_freq_update()
164 			return gf->error = errno;  in gpu_freq_update()
170 		if (gf->count == 1)  in gpu_freq_update()
175 			gf->count--;  in gpu_freq_update()
179 		gf->current = (s->act - d->act) * 1e9 / d_time;  in gpu_freq_update()
180 		gf->request = (s->req - d->req) * 1e9 / d_time;  in gpu_freq_update()