[Intel-gfx] [PATCH igt 3/4] tests/kms_fbc_crc: add wait_for_fbc_enabled()

[Paulo Zanoni]

From: Paulo Zanoni <paulo.r.zan...@intel.com>

The code has a common pattern of "wait 300ms, then check if FBC is
enabled". Most of the time FBC is enabled in either 50ms or 0ms, so
introduce wait_for_fbc_enabled(), which can return much earlier if FBC
is actually enabled before the 300ms timeout.

Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com>
---
 tests/kms_fbc_crc.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/tests/kms_fbc_crc.c b/tests/kms_fbc_crc.c
index 7c3a412..354a2b7 100644
--- a/tests/kms_fbc_crc.c
+++ b/tests/kms_fbc_crc.c
@@ -28,6 +28,7 @@
 #include <string.h>
 
 #include "drmtest.h"
+#include "igt_aux.h"
 #include "igt_debugfs.h"
 #include "igt_kms.h"
 #include "intel_chipset.h"
@@ -203,6 +204,11 @@ static bool fbc_enabled(data_t *data)
        return strstr(str, "FBC enabled") != NULL;
 }
 
+static bool wait_for_fbc_enabled(data_t *data)
+{
+       return igt_wait(fbc_enabled(data), 300, 30);
+}
+
 static void test_crc(data_t *data, enum test_mode mode)
 {
        uint32_t crtc_id = data->output->config.crtc->crtc_id;
@@ -216,9 +222,8 @@ static void test_crc(data_t *data, enum test_mode mode)
                handle = data->handle[1];
                igt_assert(drmModePageFlip(data->drm_fd, crtc_id,
                                           data->fb_id[1], 0, NULL) == 0);
-               usleep(300000);
 
-               igt_assert(fbc_enabled(data));
+               igt_assert(wait_for_fbc_enabled(data));
        }
 
        switch (mode) {
@@ -278,9 +283,7 @@ static void test_crc(data_t *data, enum test_mode mode)
         * Allow time for FBC to kick in again if it
         * got disabled during dirtyfb or page flip.
         */
-       usleep(300000);
-
-       igt_assert(fbc_enabled(data));
+       igt_assert(wait_for_fbc_enabled(data));
 
        igt_pipe_crc_start(pipe_crc);
        igt_pipe_crc_get_crcs(pipe_crc, 1, &crcs);
@@ -340,9 +343,8 @@ static bool prepare_test(data_t *data, enum test_mode 
test_mode)
        /* scanout = fb[1] */
        igt_plane_set_fb(data->primary, &data->fb[1]);
        igt_display_commit(display);
-       usleep(300000);
 
-       if (!fbc_enabled(data)) {
+       if (!wait_for_fbc_enabled(data)) {
                igt_info("FBC not enabled\n");
 
                igt_plane_set_fb(data->primary, NULL);
@@ -390,9 +392,8 @@ static bool prepare_test(data_t *data, enum test_mode 
test_mode)
        /* scanout = fb[0] */
        igt_plane_set_fb(data->primary, &data->fb[0]);
        igt_display_commit(display);
-       usleep(300000);
 
-       igt_assert(fbc_enabled(data));
+       igt_assert(wait_for_fbc_enabled(data));
 
        if (test_mode == TEST_CONTEXT || test_mode == 
TEST_PAGE_FLIP_AND_CONTEXT) {
                /*
-- 
2.1.3

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