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kms_frontbuffer_tracking: add tilingchange subtest

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During the review of a recent FBC patch, Ville pointed a problem that
happens when we use the page flip IOCTL to switch between buffers that
have different tiling formats. This test should catch the problem
introduced by that patch - which was not merged, by the way, so the
test should be passing.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
This commit is contained in:
Paulo Zanoni 2015-10-30 18:05:58 -02:00
parent 98bb8428b2
commit d2a17f4bc4
1 changed files with 48 additions and 0 deletions
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48
tests/kms_frontbuffer_tracking.c
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@ -2989,6 +2989,51 @@ static void stridechange_subtest(const struct test_mode *t)
igt_remove_fb(drm.fd, &new_fb);
}
/**
* tilingchange - alternate between tiled and untiled in multiple ways
*
* METHOD
* This test alternates between tiled and untiled frontbuffers of the same
* size and format through multiple different APIs: the page flip IOCTL,
* normal modesets and the plane APIs.
*
* EXPECTED RESULTS
* FBC gets properly disabled for the untiled FB and reenabled for the
* tiled FB.
*
* FAILURES
* Bad Kernels may somehow leave FBC enabled, which can cause FIFO underruns
* that lead to CRC assertion failures.
*/
static void tilingchange_subtest(const struct test_mode *t)
{
struct igt_fb new_fb, *old_fb;
struct modeset_params *params = pick_params(t);
enum flip_type flip_type;
prepare_subtest(t, NULL);
old_fb = params->fb.fb;
create_fb(t->format, params->fb.fb->width, params->fb.fb->height,
LOCAL_DRM_FORMAT_MOD_NONE, t->plane, &new_fb);
fill_fb(&new_fb, COLOR_PRIM_BG);
for (flip_type = 0; flip_type < FLIP_COUNT; flip_type++) {
igt_debug("Flip type: %d\n", flip_type);
/* Set a buffer with no tiling. */
params->fb.fb = &new_fb;
page_flip_for_params(params, flip_type);
do_assertions(ASSERT_FBC_DISABLED);
/* Put FBC back in a working state. */
params->fb.fb = old_fb;
page_flip_for_params(params, flip_type);
do_assertions(0);
}
}
static int opt_handler(int option, int option_index, void *data)
{
switch (option) {
@ -3378,6 +3423,9 @@ int main(int argc, char *argv[])
igt_subtest_f("%s-stridechange", feature_str(t.feature))
stridechange_subtest(&t);
igt_subtest_f("%s-tilingchange", feature_str(t.feature))
tilingchange_subtest(&t);
}
if (t.feature & FEATURE_PSR)