5036 	u8 csum = 0;  in validate_displayid()  local
5047 		csum += displayid[i];  in validate_displayid()
5048 	if (csum) {  in validate_displayid()
5049 		debug("DisplayID checksum invalid, remainder is %d\n", csum);  in validate_displayid()
5491 	u8 csum = 0;  in drm_edid_block_checksum()  local
5494 		csum += raw_edid[i];  in drm_edid_block_checksum()
5496 	return csum;  in drm_edid_block_checksum()
5523 	u8 csum;  in drm_edid_block_valid()  local
5553 	csum = drm_edid_block_checksum(raw_edid);  in drm_edid_block_valid()
5554 	if (csum) {  in drm_edid_block_valid()
5557 			      csum);  in drm_edid_block_valid()
5934 	u8 csum = 0;  in hdmi_infoframe_checksum()  local
5939 		csum += ptr[i];  in hdmi_infoframe_checksum()
5941 	return 256 - csum;  in hdmi_infoframe_checksum()