diff mbox series

[v4,4/4] drm/edid: Make sure the CEA mode arrays have the correct amount of modes

Message ID 20191213174348.27261-5-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series drm/edid: Add new modes from CTA-861-G | expand

Commit Message

Ville Syrjala Dec. 13, 2019, 5:43 p.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

We depend on a specific relationship between the VIC number and the
index in the CEA mode arrays. Assert that the arrays have the expected
size to make sure we've not accidentally left holes in them.

v2: Pimp the BUILD_BUG_ON()s
v3: Fix typos (Manasi)

Cc: Hans Verkuil <hansverk@cisco.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Thomas Anderson <thomasanderson@google.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/drm_edid.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 8bc69da53c2e..ec5b88120428 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3213,6 +3213,9 @@  static u8 *drm_find_cea_extension(const struct edid *edid)
 
 static const struct drm_display_mode *cea_mode_for_vic(u8 vic)
 {
+	BUILD_BUG_ON(1 + ARRAY_SIZE(edid_cea_modes_1) - 1 != 127);
+	BUILD_BUG_ON(193 + ARRAY_SIZE(edid_cea_modes_193) - 1 != 219);
+
 	if (vic >= 1 && vic < 1 + ARRAY_SIZE(edid_cea_modes_1))
 		return &edid_cea_modes_1[vic - 1];
 	if (vic >= 193 && vic < 193 + ARRAY_SIZE(edid_cea_modes_193))