On 06/06, Ser, Simon wrote: > On Tue, 2019-06-04 at 23:30 -0300, Rodrigo Siqueira wrote: > > The kms_flip test relies on VBlank support, and this situation may > > exclude some virtual drivers to take advantage of this set of tests. > > This commit adds a mechanism that checks if a module has VBlank. If the > > target module has VBlank support, kms_flip will run all the VBlank > > tests; otherwise, the VBlank tests will be skipped. Additionally, this > > commit improves the test coverage by checks if the function > > drmWaitVBlank() returns EOPNOTSUPP (i.e., no VBlank support). > > > > V7: Changes since V6 > > - Skip TEST_DPMS with TEST_MODESET and TEST_EBUSY if the device does > > not support vblank > > Hmm, I'm not sure I understand this line. If I'm reading this correctly > it refers to this line: > > if (!(o->flags & (TEST_DPMS | TEST_MODESET | TEST_NO_VBLANK))) > > So the check was previously skipped on TEST_DPMS and TEST_MODESET. It's > now skipped on TEST_NO_VBLANK too. So I'm a little confused with the > changelog line: should it say "skip seq number checking it the device > doesn't support vblank"? > > Am I missing something? > > Apart from this, the patch itself looks good to me.
Hi Simon, Thank you for your review. About the changelog message, I'll update it to: Skip seq number checking and busy flip if the device doesn't support vblank Can I add your Reviewed-by before applying this patch? > > V6: Set errno to zero before call drmWaitVBlank() (Chris Wilson) > > > > V5: Drop the DRM_VBLANK_NEXTONMISS (Chris Wilson) > > > > V4: Replace DRM_VBLANK_ABSOLUTE by DRM_VBLANK_RELATIVE and > > DRM_VBLANK_NEXTONMISS > > > > V3: Add documentation (Daniel Vetter) > > > > V2: Add new branch coverage to check if VBlank is enabled or not and > > update commit message > > > > V1: Chris Wilson > > - Change function name from igt_there_is_vblank to kms_has_vblank > > - Move vblank function check from igt_aux to igt_kms > > - Utilizes memset in dummy_vbl variable > > - Directly return the result of drmWaitVBlank() > > > > Signed-off-by: Rodrigo Siqueira <[email protected]> > > --- > > lib/igt_kms.c | 21 +++++++++++++++++++++ > > lib/igt_kms.h | 2 ++ > > tests/kms_flip.c | 24 +++++++++++++++++++++++- > > 3 files changed, 46 insertions(+), 1 deletion(-) > > > > diff --git a/lib/igt_kms.c b/lib/igt_kms.c > > index d7d711a7..8a465f67 100644 > > --- a/lib/igt_kms.c > > +++ b/lib/igt_kms.c > > @@ -1673,6 +1673,27 @@ void igt_assert_plane_visible(int fd, enum pipe > > pipe, int plane_index, bool visi > > igt_assert_eq(visible, visibility); > > } > > > > +/** > > + * kms_has_vblank: > > + * @fd: DRM fd > > + * > > + * Get the VBlank errno after an attempt to call drmWaitVBlank(). This > > + * function is useful for checking if a driver has support or not for > > VBlank. > > + * > > + * Returns: true if target driver has VBlank support, otherwise return > > false. > > + */ > > +bool kms_has_vblank(int fd) > > +{ > > + drmVBlank dummy_vbl; > > + > > + memset(&dummy_vbl, 0, sizeof(drmVBlank)); > > + dummy_vbl.request.type = DRM_VBLANK_RELATIVE; > > + > > + errno = 0; > > + drmWaitVBlank(fd, &dummy_vbl); > > + return (errno != EOPNOTSUPP); > > +} > > + > > /* > > * A small modeset API > > */ > > diff --git a/lib/igt_kms.h b/lib/igt_kms.h > > index 4ac28131..5b5cf274 100644 > > --- a/lib/igt_kms.h > > +++ b/lib/igt_kms.h > > @@ -229,6 +229,8 @@ void kmstest_wait_for_pageflip(int fd); > > unsigned int kmstest_get_vblank(int fd, int pipe, unsigned int flags); > > void igt_assert_plane_visible(int fd, enum pipe pipe, int plane_index, > > bool visibility); > > > > +bool kms_has_vblank(int fd); > > + > > /* > > * A small modeset API > > */ > > diff --git a/tests/kms_flip.c b/tests/kms_flip.c > > index d7c1f9cf..2a158d97 100755 > > --- a/tests/kms_flip.c > > +++ b/tests/kms_flip.c > > @@ -71,6 +71,7 @@ > > #define TEST_SUSPEND (1 << 26) > > #define TEST_BO_TOOBIG (1 << 28) > > > > +#define TEST_NO_VBLANK (1 << 29) > > #define TEST_BASIC (1 << 30) > > > > #define EVENT_FLIP (1 << 0) > > @@ -126,6 +127,18 @@ struct event_state { > > int seq_step; > > }; > > > > +static bool vblank_dependence(int flags) > > +{ > > + int vblank_flags = TEST_VBLANK | TEST_VBLANK_BLOCK | > > + TEST_VBLANK_ABSOLUTE | TEST_VBLANK_EXPIRED_SEQ | > > + TEST_CHECK_TS | TEST_VBLANK_RACE | TEST_EBUSY; > > + > > + if (flags & vblank_flags) > > + return true; > > + > > + return false; > > +} > > + > > static float timeval_float(const struct timeval *tv) > > { > > return tv->tv_sec + tv->tv_usec / 1000000.0f; > > @@ -494,7 +507,7 @@ static void check_state(const struct test_output *o, > > const struct event_state *e > > /* check only valid if no modeset happens in between, that increments by > > * (1 << 23) on each step. This bounding matches the one in > > * DRM_IOCTL_WAIT_VBLANK. */ > > - if (!(o->flags & (TEST_DPMS | TEST_MODESET))) > > + if (!(o->flags & (TEST_DPMS | TEST_MODESET | TEST_NO_VBLANK))) > > igt_assert_f(es->current_seq - (es->last_seq + o->seq_step) <= > > 1UL << 23, > > "unexpected %s seq %u, should be >= %u\n", > > es->name, es->current_seq, es->last_seq + > > o->seq_step); > > @@ -1176,6 +1189,7 @@ static void run_test_on_crtc_set(struct test_output > > *o, int *crtc_idxs, > > unsigned bo_size = 0; > > uint64_t tiling; > > int i; > > + bool vblank = true; > > > > switch (crtc_count) { > > case RUN_TEST: > > @@ -1259,6 +1273,14 @@ static void run_test_on_crtc_set(struct test_output > > *o, int *crtc_idxs, > > } > > igt_assert(fb_is_bound(o, o->fb_ids[0])); > > > > + vblank = kms_has_vblank(drm_fd); > > + if (!vblank) { > > + if (vblank_dependence(o->flags)) > > + igt_require_f(vblank, "There is no VBlank\n"); > > + else > > + o->flags |= TEST_NO_VBLANK; > > + } > > + > > /* quiescent the hw a bit so ensure we don't miss a single frame */ > > if (o->flags & TEST_CHECK_TS) > > calibrate_ts(o, crtc_idxs[0]); -- Rodrigo Siqueira https://siqueira.tech
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