Op 19-09-17 om 13:49 schreef Ville Syrjälä: > On Tue, Sep 19, 2017 at 01:31:13PM +0200, Maarten Lankhorst wrote: >> Collecting CRC may force a modeset, which is a bad idea after we just >> forced a hang. The hang is intended to make sure the page flip doesn't >> complete before the cursor, making sure that works. >> >> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> >> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102259 >> Cc: Marta Lofstedt <marta.lofstedt@xxxxxxxxx> >> --- >> tests/kms_cursor_legacy.c | 25 +++++++++++++++++++++---- >> 1 file changed, 21 insertions(+), 4 deletions(-) >> >> diff --git a/tests/kms_cursor_legacy.c b/tests/kms_cursor_legacy.c >> index 2d32d3a91570..c3149535b838 100644 >> --- a/tests/kms_cursor_legacy.c >> +++ b/tests/kms_cursor_legacy.c >> @@ -1334,7 +1334,7 @@ static void flip_vs_cursor_busy_crc(igt_display_t *display, bool atomic) >> igt_pipe_crc_t *pipe_crc; >> igt_pipe_t *pipe_connected = &display->pipes[pipe]; >> igt_plane_t *plane_primary = igt_pipe_get_plane_type(pipe_connected, DRM_PLANE_TYPE_PRIMARY); >> - igt_crc_t crcs[3]; >> + igt_crc_t crcs[2]; >> >> if (atomic) >> igt_require(display->is_atomic); >> @@ -1348,7 +1348,7 @@ static void flip_vs_cursor_busy_crc(igt_display_t *display, bool atomic) >> >> igt_display_commit2(display, display->is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY); >> >> - pipe_crc = igt_pipe_crc_new(display->drm_fd, pipe, INTEL_PIPE_CRC_SOURCE_AUTO); >> + pipe_crc = igt_pipe_crc_new_nonblock(display->drm_fd, pipe, INTEL_PIPE_CRC_SOURCE_AUTO); >> >> set_cursor_on_pipe(display, pipe, &cursor_fb); >> igt_display_commit2(display, COMMIT_UNIVERSAL); >> @@ -1371,9 +1371,17 @@ static void flip_vs_cursor_busy_crc(igt_display_t *display, bool atomic) >> igt_plane_set_fb(plane_primary, &fb_info[0]); >> igt_display_commit2(display, COMMIT_UNIVERSAL); >> >> + /* >> + * We must enable CRC collecting here since this may force >> + * a modeset, and this loop is timing sensitive. >> + */ >> + igt_pipe_crc_start(pipe_crc); >> + >> /* Disable cursor, and immediately queue a flip. Check if resulting crc is correct. */ >> for (int i = 1; i >= 0; i--) { >> uint32_t *busy; >> + igt_crc_t *received_crcs = NULL; >> + int ncrcs; >> >> busy = make_fb_busy(display->drm_fd, &fb_info[1]); >> >> @@ -1384,7 +1392,7 @@ static void flip_vs_cursor_busy_crc(igt_display_t *display, bool atomic) >> >> igt_assert_eq(get_vblank(display->drm_fd, pipe, 0), vblank_start); >> >> - igt_pipe_crc_collect_crc(pipe_crc, &crcs[2]); >> + ncrcs = igt_pipe_crc_get_crcs(pipe_crc, 8, &received_crcs); >> >> finish_fb_busy(busy); >> >> @@ -1397,13 +1405,22 @@ static void flip_vs_cursor_busy_crc(igt_display_t *display, bool atomic) >> igt_plane_set_fb(plane_primary, &fb_info[0]); >> igt_display_commit2(display, COMMIT_UNIVERSAL); >> >> - igt_assert_crc_equal(&crcs[i], &crcs[2]); >> + igt_assert(ncrcs > 0); > Should we perhaps assign some arbitrary upper limit on the crcs we get? > If the kernel already buffered 8 or more crcs, we may get a crc mismatch > even though the problem is that the test blocked for too long and we're > now looking at a stale crc rather than the current crc being wrong. > Might make it slightly easier to diagnose the failure correctly. > > Anyways > Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > I figured 8 is enough, ack if I change it to igt_assert(ncrcs > 0 && ncrcs < 8), so we know we don't overflow? _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
