On Sun, 23 Nov 2014, Stefan Brüns stefan.bruens@rwth-aachen.de wrote:
The function will also be used by a later patch, so factor it out.
V2: make raw_edid const, define/declare before first use
Signed-off-by: Stefan Brüns stefan.bruens@rwth-aachen.de Reviewed-by: Jani Nikula jani.nikula@intel.com
drivers/gpu/drm/drm_edid.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index a71ed93..f6c4a1d 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1022,6 +1022,16 @@ static bool drm_edid_is_zero(const u8 *in_edid, int length) return true; }
+static u8 drm_edid_block_checksum(const u8 *raw_edid) +{
- int i;
- u8 csum = 0;
- for (i = 0; i < EDID_LENGTH; i++)
csum += raw_edid[i];- return csum;
+}
/**
- drm_edid_block_valid - Sanity check the EDID block (base or extension)
- @raw_edid: pointer to raw EDID block
@@ -1036,7 +1046,6 @@ static bool drm_edid_is_zero(const u8 *in_edid, int length) bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid) { int i;
- u8 csum = 0;
I meant it's no longer necessary to initialize this to 0. You still need the variable. Please try compiling the code you send and you'll see why. ;)
BR, Jani.
struct edid *edid = (struct edid *)raw_edid;
if (WARN_ON(!raw_edid)) @@ -1056,9 +1065,7 @@ bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid) } }
- for (i = 0; i < EDID_LENGTH; i++)
csum += raw_edid[i];- if (csum) {
- if (drm_edid_block_checksum(raw_edid)) { if (print_bad_edid) { DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); }
-- 2.1.2
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