common: edid: check for digital display earlier

When searching for detailed timing in EDID, check for digital display
earlier. There is no point parsing other parameters if this flag is not
present.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

diff --git a/common/edid.c b/common/edid.c
index 553ab8f..1cb7177 100644 (file)
--- a/common/edid.c
+++ b/common/edid.c
@@ -185,6 +185,11 @@ int edid_get_timing_validate(u8 *buf, int buf_size,
                return -EINVAL;
        }
 
+       if (!EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid)) {
+               debug("%s: Not a digital display\n", __func__);
+               return -ENOSYS;
+       }
+
        if (!EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(*edid)) {
                debug("%s: No preferred timing\n", __func__);
                return -ENOENT;
@@ -211,10 +216,6 @@ int edid_get_timing_validate(u8 *buf, int buf_size,
        if (!timing_done)
                return -EINVAL;
 
-       if (!EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid)) {
-               debug("%s: Not a digital display\n", __func__);
-               return -ENOSYS;
-       }
        if (edid->version != 1 || edid->revision < 4) {
                debug("%s: EDID version %d.%d does not have required info\n",
                      __func__, edid->version, edid->revision);