[PATCH 1/2] drm/edid: new drm_edid_block_checksum helper function

[Stefan Brüns]

Signed-off-by: Stefan Brüns <stefan.bruens at rwth-aachen.de>
---
 drivers/gpu/drm/drm_edid.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 0755d01..505960e 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1184,6 +1184,17 @@ static bool drm_edid_is_zero(u8 *in_edid, int length)
 	return true;
 }
 
+static u8
+drm_edid_block_checksum(u8 *raw_edid)
+{
+	int i;
+	u8 csum = 0;
+	for (i = 0; i < EDID_LENGTH; i++)
+		csum += raw_edid[i];
+
+	return csum;
+}
+
 static u8 *
 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
 {
-- 
1.8.4.5