[PATCH i-g-t 2/3] lib/igt_kms: Add kmstest_wait_for_pageflip_timeout()

[Imre Deak <imre.deak@intel.com>]

Add a function to wait for a page flip completion providing the timeout
duration. This is required by the next patch, using an Intel HW specific
pageflip timeout.

Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 lib/igt_kms.c | 21 +++++++++++++++++----
 lib/igt_kms.h |  1 +
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 99231d6e7..81a9930a2 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -2377,15 +2377,16 @@ unsigned int kmstest_get_vblank(int fd, int pipe, unsigned int flags)
 }
 
 /**
- * kmstest_wait_for_pageflip:
+ * kmstest_wait_for_pageflip_timeout:
  * @fd: Opened drm file descriptor
+ * @timeout_us: timeout used for waiting
  *
  * Blocks until pageflip is completed
  */
-void kmstest_wait_for_pageflip(int fd)
+void kmstest_wait_for_pageflip_timeout(int fd, uint64_t timeout_us)
 {
 	drmEventContext evctx = { .version = 2 };
-	struct timeval timeout = { .tv_sec = 0, .tv_usec = 50000 };
+	struct timeval timeout = { .tv_sec = 0, .tv_usec = timeout_us };
 	fd_set fds;
 	int ret;
 
@@ -2398,7 +2399,8 @@ void kmstest_wait_for_pageflip(int fd)
 	} while (ret < 0 && errno == EINTR);
 
 	igt_fail_on_f(ret == 0,
-		     "Exceeded timeout (50ms) while waiting for a pageflip\n");
+		     "Exceeded timeout (%" PRIu64 " us) while waiting for a pageflip\n",
+		     timeout_us);
 
 	igt_assert_f(ret == 1,
 		     "Waiting for pageflip failed with %d from select(drmfd)\n",
@@ -2407,6 +2409,17 @@ void kmstest_wait_for_pageflip(int fd)
 	igt_assert(drmHandleEvent(fd, &evctx) == 0);
 }
 
+/**
+ * kmstest_wait_for_pageflip:
+ * @fd: Opened drm file descriptor
+ *
+ * Blocks until pageflip is completed using a 50 ms timeout.
+ */
+void kmstest_wait_for_pageflip(int fd)
+{
+	kmstest_wait_for_pageflip_timeout(fd, 50000);
+}
+
 /**
  * kms_has_vblank:
  * @fd: DRM fd
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index fc7e4cda1..57e62d86c 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -310,6 +310,7 @@ void *kmstest_dumb_map_buffer(int fd, uint32_t handle, uint64_t size,
 			      unsigned prot);
 void kmstest_dumb_destroy(int fd, uint32_t handle);
 void kmstest_wait_for_pageflip(int fd);
+void kmstest_wait_for_pageflip_timeout(int fd, uint64_t timeout_us);
 unsigned int kmstest_get_vblank(int fd, int pipe, unsigned int flags);
 
 bool kms_has_vblank(int fd);
-- 
2.44.2