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authorMaarten Lankhorst <maarten.lankhorst@linux.intel.com>2018-07-24 15:59:25 +0200
committerMaarten Lankhorst <maarten.lankhorst@linux.intel.com>2018-08-14 17:34:58 +0200
commitdeead1d39368ac11a66f0d9def39f75d1db7e78b (patch)
treea55e799797e24380ad0db0e3a304f4bbf872dfcb /lib/igt_debugfs.h
parentb0263e5d0563a81a42cf66e7d3b84662d3222862 (diff)
lib/igt_debugfs: Add igt_pipe_crc_get_current() to get a crc.
A pair of igt_pipe_crc_drain() and igt_pipe_crc_get_single() has a bug in which you're not sure whether the new CRC is captured because the vblank irq may race against the CRC irq and delivered to userspace too soon. When receiving a vblank event, igt_pipe_crc_drain() will then drain all crc's, but not the new (stale) crc, which is then delivered and immediately returned by igt_pipe_crc_get_single(). Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'lib/igt_debugfs.h')
-rw-r--r--lib/igt_debugfs.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/igt_debugfs.h b/lib/igt_debugfs.h
index 8d25abfe..db634a82 100644
--- a/lib/igt_debugfs.h
+++ b/lib/igt_debugfs.h
@@ -132,6 +132,8 @@ int igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
igt_crc_t **out_crcs);
void igt_pipe_crc_drain(igt_pipe_crc_t *pipe_crc);
bool igt_pipe_crc_get_single(igt_pipe_crc_t *pipe_crc, igt_crc_t *out_crc);
+void igt_pipe_crc_get_current(int drm_fd, igt_pipe_crc_t *pipe_crc, igt_crc_t *crc);
+
void igt_pipe_crc_collect_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out_crc);
void igt_hpd_storm_set_threshold(int fd, unsigned int threshold);