@@ -14,5 +14,6 @@ typedef struct qemu_edid_info {
void qemu_edid_generate(uint8_t *edid, size_t size,
qemu_edid_info *info);
+size_t qemu_edid_size(uint8_t *edid);
#endif /* EDID_H */
@@ -423,3 +423,17 @@ void qemu_edid_generate(uint8_t *edid, size_t size,
edid_checksum(dta);
}
}
+
+size_t qemu_edid_size(uint8_t *edid)
+{
+ uint32_t exts;
+
+ if (edid[0] != 0x00 ||
+ edid[1] != 0xff) {
+ /* doesn't look like a valid edid block */
+ return 0;
+ }
+
+ exts = edid[126];
+ return 128 * (exts + 1);
+}
Helper function to figure the size of a edid blob, by checking how many extensions are present. Both the base edid blob and the extensions are 128 bytes in size. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180925075646.25114-3-kraxel@redhat.com --- include/hw/display/edid.h | 1 + hw/display/edid-generate.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+)