2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Ben Widawsky <ben@bwidawsk.net>
25 * Jeff McGee <jeff.mcgee@intel.com>
37 static bool verbose = false;
38 static int origmin, origmax;
40 static const char sysfs_base_path[] = "/sys/class/drm/card%d/gt_%s_freq_mhz";
55 { "cur", "r", NULL }, { "min", "rb+", NULL }, { "max", "rb+", NULL }, { "RP0", "r", NULL }, { "RP1", "r", NULL }, { "RPn", "r", NULL }, { NULL, NULL, NULL }
58 static int readval(FILE *filp)
64 scanned = fscanf(filp, "%d", &val);
65 igt_assert(scanned == 1);
70 static int do_writeval(FILE *filp, int val, int lerrno)
76 ret = fprintf(filp, "%d", val);
79 /* Expecting specific error */
80 igt_assert(ret == EOF && errno == lerrno);
81 igt_assert(readval(filp) == orig);
83 /* Expecting no error */
84 igt_assert(ret != EOF);
85 igt_assert(readval(filp) == val);
90 #define writeval(filp, val) do_writeval(filp, val, 0)
91 #define writeval_inval(filp, val) do_writeval(filp, val, EINVAL)
93 #define fcur (readval(stuff[CUR].filp))
94 #define fmin (readval(stuff[MIN].filp))
95 #define fmax (readval(stuff[MAX].filp))
96 #define frp0 (readval(stuff[RP0].filp))
97 #define frp1 (readval(stuff[RP1].filp))
98 #define frpn (readval(stuff[RPn].filp))
100 static void setfreq(int val)
103 writeval(stuff[MAX].filp, val);
104 writeval(stuff[MIN].filp, val);
106 writeval(stuff[MIN].filp, val);
107 writeval(stuff[MAX].filp, val);
111 static void checkit(void)
113 igt_assert(fmin <= fmax);
114 igt_assert(fcur <= fmax);
115 igt_assert(fmin <= fcur);
116 igt_assert(frpn <= fmin);
117 igt_assert(fmax <= frp0);
118 igt_assert(frp1 <= frp0);
119 igt_assert(frpn <= frp1);
120 igt_assert(frp0 != 0);
121 igt_assert(frp1 != 0);
124 static void dumpit(void)
126 struct junk *junk = stuff;
128 printf("gt frequency %s (MHz): %d\n", junk->name, readval(junk->filp));
130 } while(junk->name != NULL);
134 #define dump() if (verbose) dumpit()
135 #define log(...) if (verbose) printf(__VA_ARGS__)
137 static void min_max_config(void (*check)(void))
139 int fmid = (frpn + frp0) / 2;
141 log("Check original min and max...\n");
144 log("Set min=RPn and max=RP0...\n");
145 writeval(stuff[MIN].filp, frpn);
146 writeval(stuff[MAX].filp, frp0);
149 log("Increase min to midpoint...\n");
150 writeval(stuff[MIN].filp, fmid);
153 log("Increase min to RP0...\n");
154 writeval(stuff[MIN].filp, frp0);
157 log("Increase min above RP0 (invalid)...\n");
158 writeval_inval(stuff[MIN].filp, frp0 + 1000);
161 log("Decrease max to RPn (invalid)...\n");
162 writeval_inval(stuff[MAX].filp, frpn);
165 log("Decrease min to midpoint...\n");
166 writeval(stuff[MIN].filp, fmid);
169 log("Decrease min to RPn...\n");
170 writeval(stuff[MIN].filp, frpn);
173 log("Decrease min below RPn (invalid)...\n");
174 writeval_inval(stuff[MIN].filp, 0);
177 log("Decrease max to midpoint...\n");
178 writeval(stuff[MAX].filp, fmid);
181 log("Decrease max to RPn...\n");
182 writeval(stuff[MAX].filp, frpn);
185 log("Decrease max below RPn (invalid)...\n");
186 writeval_inval(stuff[MAX].filp, 0);
189 log("Increase min to RP0 (invalid)...\n");
190 writeval_inval(stuff[MIN].filp, frp0);
193 log("Increase max to midpoint...\n");
194 writeval(stuff[MAX].filp, fmid);
197 log("Increase max to RP0...\n");
198 writeval(stuff[MAX].filp, frp0);
201 log("Increase max above RP0 (invalid)...\n");
202 writeval_inval(stuff[MAX].filp, frp0 + 1000);
206 static void idle_check(void)
212 static void pm_rps_exit_handler(int sig)
214 if (origmin > fmax) {
215 writeval(stuff[MAX].filp, origmax);
216 writeval(stuff[MIN].filp, origmin);
218 writeval(stuff[MIN].filp, origmin);
219 writeval(stuff[MAX].filp, origmax);
223 static int opt_handler(int opt, int opt_index)
236 /* Mod of igt_subtest_init that adds our extra options */
237 static void subtest_init(int argc, char **argv)
239 struct option long_opts[] = {
240 {"verbose", 0, 0, 'v'}
242 const char *help_str = " -v, --verbose";
245 ret = igt_subtest_init_parse_opts(argc, argv, "v", long_opts,
246 help_str, opt_handler);
249 /* exit with no error for -h/--help */
250 exit(ret == -1 ? 0 : ret);
253 int main(int argc, char **argv)
255 subtest_init(argc, argv);
257 igt_skip_on_simulation();
260 const int device = drm_get_card();
261 struct junk *junk = stuff;
264 /* Use drm_open_any to verify device existence */
271 ret = asprintf(&path, sysfs_base_path, device, junk->name);
272 igt_assert(ret != -1);
273 junk->filp = fopen(path, junk->mode);
274 igt_require(junk->filp);
275 setbuf(junk->filp, NULL);
277 val = readval(junk->filp);
278 igt_assert(val >= 0);
280 } while(junk->name != NULL);
285 igt_install_exit_handler(pm_rps_exit_handler);
288 igt_subtest("min-max-config-at-idle")
289 min_max_config(idle_check);