[PATCH edid-decode 7/9] Print video format preference data block

[Arnaud Vrac]

From: Arnaud Vrac <av...@freebox.fr>

This only prints VIC codes, not DTD.
---
 edid-decode.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/edid-decode.c b/edid-decode.c
index cd5a257..2e367b3 100644
--- a/edid-decode.c
+++ b/edid-decode.c
@@ -795,6 +795,36 @@ cea_y420vdb(unsigned char *x)
     cea_svd(x + 2, length - 1);
 }
 
+static void
+cea_vfpdb(unsigned char *x)
+{
+    int length = x[0] & 0x1f;
+    int i;
+
+    for (i = 2; i <= length; i++)  {
+       unsigned char svr = x[i];
+
+       if ((svr > 0 && svr < 128) || (svr > 192 && svr < 254)) {
+           unsigned char vic;
+           const char *mode;
+           int index;
+
+           vic = svr;
+           index = vic - 1;
+
+           if (index < ARRAY_SIZE(edid_cea_modes))
+               mode = edid_cea_modes[vic];
+           else
+               mode = "Unknown mode";
+
+           printf("    VIC %02d %s\n", vic, mode);
+
+       } else if (svr > 128 && svr < 145) {
+           printf("    DTD number %02d\n", svr - 128);
+       }
+    }
+}
+
 static const char *edid_cea_hdmi_modes[] = {
     "3840x2160@30Hz",
     "3840x2160@25Hz",
@@ -1128,6 +1158,7 @@ cea_block(unsigned char *x)
                    break;
                case 0x0d:
                    printf("Video format preference data block\n");
+                   cea_vfpdb(x);
                    break;
                case 0x0e:
                    printf("YCbCr 4:2:0 video data block\n");
-- 
2.7.4

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