[PATCH i-g-t] tests/pm_rps: Add handling of idle frequency exposed via sysfs

[Michał Winiarski <michal.winiarski@xxxxxxxxx>]

Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
---
 tests/pm_rps.c | 36 ++++++++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/tests/pm_rps.c b/tests/pm_rps.c
index c3d4417..a0e6655 100644
--- a/tests/pm_rps.c
+++ b/tests/pm_rps.c
@@ -45,6 +45,7 @@ static int drm_fd;
 static const char sysfs_base_path[] = "/sys/class/drm/card%d/gt_%s_freq_mhz";
 enum {
 	CUR,
+	IDL,
 	MIN,
 	MAX,
 	RP0,
@@ -60,7 +61,7 @@ struct junk {
 	const char *mode;
 	FILE *filp;
 } stuff[] = {
-	{ "cur", "r", NULL }, { "min", "rb+", NULL }, { "max", "rb+", NULL }, { "RP0", "r", NULL }, { "RP1", "r", NULL }, { "RPn", "r", NULL }, { NULL, NULL, NULL }
+	{ "cur", "r", NULL }, {"idl", "rb+", NULL }, { "min", "rb+", NULL }, { "max", "rb+", NULL }, { "RP0", "r", NULL }, { "RP1", "r", NULL }, { "RPn", "r", NULL }, { NULL, NULL, NULL }
 };
 
 static int readval(FILE *filp)
@@ -145,6 +146,7 @@ static int do_writeval(FILE *filp, int val, int lerrno, bool readback_check)
 static void checkit(const int *freqs)
 {
 	igt_assert_lte(freqs[MIN], freqs[MAX]);
+	igt_assert_lte(freqs[IDL], freqs[MIN]);
 	igt_assert_lte(freqs[CUR], freqs[MAX]);
 	igt_assert_lte(freqs[RPn], freqs[CUR]);
 	igt_assert_lte(freqs[RPn], freqs[MIN]);
@@ -160,6 +162,7 @@ static void matchit(const int *freqs1, const int *freqs2)
 	igt_assert_eq(freqs1[CUR], freqs2[CUR]);
 	igt_assert_eq(freqs1[MIN], freqs2[MIN]);
 	igt_assert_eq(freqs1[MAX], freqs2[MAX]);
+	igt_assert_eq(freqs1[IDL], freqs2[IDL]);
 	igt_assert_eq(freqs1[RP0], freqs2[RP0]);
 	igt_assert_eq(freqs1[RP1], freqs2[RP1]);
 	igt_assert_eq(freqs1[RPn], freqs2[RPn]);
@@ -379,19 +382,44 @@ static void min_max_config(void (*check)(void), bool load_gpu)
 		do_load_gpu();
 	check();
 
-	igt_debug("\nSet min=RPn and max=RP0...\n");
+	igt_debug("\nSet idle=RPn, min=RPn and max=RP0...\n");
+	writeval(stuff[IDL].filp, origfreqs[RPn]);
 	writeval(stuff[MIN].filp, origfreqs[RPn]);
 	writeval(stuff[MAX].filp, origfreqs[RP0]);
 	if (load_gpu)
 		do_load_gpu();
 	check();
 
+	igt_debug("\nIncrease idle above min (invalid)...\n");
+	writeval_inval(stuff[IDL].filp, origfreqs[RPn] + 100);
+	if (load_gpu)
+		do_load_gpu();
+	check();
+
 	igt_debug("\nIncrease min to midpoint...\n");
 	writeval(stuff[MIN].filp, fmid);
 	if (load_gpu)
 		do_load_gpu();
 	check();
 
+	igt_debug("\nIncrease idle to midpoint...\n");
+	writeval(stuff[IDL].filp, fmid);
+	if (load_gpu)
+		do_load_gpu();
+	check();
+
+	igt_debug("\nDecrease min below idle (invalid)...\n");
+	writeval_inval(stuff[MIN].filp, fmid - 100);
+	if (load_gpu)
+		do_load_gpu();
+	check();
+
+	igt_debug("\nDecrease idle to RPn...\n");
+	writeval(stuff[IDL].filp, origfreqs[RPn]);
+	if (load_gpu)
+		do_load_gpu();
+	check();
+
 	igt_debug("\nIncrease min to RP0...\n");
 	writeval(stuff[MIN].filp, origfreqs[RP0]);
 	if (load_gpu)
@@ -476,13 +504,13 @@ static void idle_check(void)
 		read_freqs(freqs);
 		dump(freqs);
 		checkit(freqs);
-		if (freqs[CUR] == freqs[RPn])
+		if (freqs[CUR] == freqs[IDL])
 			break;
 		usleep(1000 * IDLE_WAIT_TIMESTEP_MSEC);
 		wait += IDLE_WAIT_TIMESTEP_MSEC;
 	} while (wait < IDLE_WAIT_TIMEOUT_MSEC);
 
-	igt_assert_eq(freqs[CUR], freqs[RPn]);
+	igt_assert_eq(freqs[CUR], freqs[IDL]);
 	igt_debug("Required %d msec to reach cur=idle\n", wait);
 }
 
-- 
2.8.0

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