[Intel-gfx] [PATCH i-g-t 2/3] lib/igt_kms: Add fail exit branch in do_display_commit()

[Gabriel Feceoru]

On Cherryview PIPE_C can only be connected to PORT_D (bspec).
The driver properly reports the crtc_mask for the encoder, however the
mismatch between pipe and port is not reported back to the test.

Add support for detecting this case so the test can be skipped.

Signed-off-by: Gabriel Feceoru <gabriel.feceoru at intel.com>
---
 lib/igt_kms.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 90c8da7..b18a317 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -1669,6 +1669,7 @@ static int do_display_commit(igt_display_t *display,
 			     bool fail_on_error)
 {
 	int i, ret;
+	int valid_outs = 0;
 
 	LOG_INDENT(display, "commit");
 
@@ -1680,12 +1681,16 @@ static int do_display_commit(igt_display_t *display,
 		if (!output->valid)
 			continue;
 
+		valid_outs++;
 		ret = igt_output_commit(output, s, fail_on_error);
 		CHECK_RETURN(ret, fail_on_error);
 	}
 
 	LOG_UNINDENT(display);
 
+	if (valid_outs == 0)
+		return -1;
+
 	igt_debug_wait_for_keypress("modeset");
 
 	return 0;
@@ -1712,9 +1717,7 @@ static int do_display_commit(igt_display_t *display,
 int igt_display_commit2(igt_display_t *display,
 		       enum igt_commit_style s)
 {
-	do_display_commit(display, s, true);
-
-	return 0;
+	return do_display_commit(display, s, true);
 }
 
 /**
-- 
1.9.1