[igt-dev] [PATCH i-g-t 1/2] tests/kms_chamelium: Fix dp-mode-timings test

[Arkadiusz Hiler]

Chamelium provides us with hsync_offset value which is read form its
receiver register described as "Hsync start edge to H active start
edge", vsync_offest is analogous.

Let's calculate the correct things on IGT side.

Cc: Nidhi Gupta <nidhi1.gupta at intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
---
 tests/kms_chamelium.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tests/kms_chamelium.c b/tests/kms_chamelium.c
index 77c203d3..19df784b 100644
--- a/tests/kms_chamelium.c
+++ b/tests/kms_chamelium.c
@@ -915,10 +915,14 @@ static void check_mode(struct chamelium *chamelium, struct chamelium_port *port,
 	chamelium_port_get_video_params(chamelium, port, &video_params);
 
 	mode_clock = (double) mode->clock / 1000;
-	mode_hsync_offset = mode->hsync_start - mode->hdisplay;
-	mode_vsync_offset = mode->vsync_start - mode->vdisplay;
+
+	/* this is what chamelium understands as offsets */
+	mode_hsync_offset = mode->htotal - mode->hsync_start;
+	mode_vsync_offset = mode->vtotal - mode->vsync_start;
+
 	mode_hsync_width = mode->hsync_end - mode->hsync_start;
 	mode_vsync_width = mode->vsync_end - mode->vsync_start;
+
 	mode_hsync_polarity = !!(mode->flags & DRM_MODE_FLAG_PHSYNC);
 	mode_vsync_polarity = !!(mode->flags & DRM_MODE_FLAG_PVSYNC);
 
-- 
2.24.1