From: David Ung <davidu@xxxxxxxxxx>
Check EDID Vendor Specific Data Block bytes to see if the connection
is HDMI and set FB_MISC_HDMI.
Signed-off-by: David Ung <davidu@xxxxxxxxxx>
Signed-off-by: Christopher Freeman<cfreeman@xxxxxxxxxx>
---
drivers/video/fbmon.c | 9 ++++++++-
include/linux/fb.h | 1 +
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c
index 6103fa6..3ac6367 100644
--- a/drivers/video/fbmon.c
+++ b/drivers/video/fbmon.c
@@ -1012,13 +1012,20 @@ void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
while (pos < edid[2]) {
u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7;
pr_debug("Data block %u of %u bytes\n", type, len);
- if (type == 2)
+ if (type == 2) {
for (i = pos; i < pos + len; i++) {
u8 idx = edid[pos + i] & 0x7f;
svd[svd_n++] = idx;
pr_debug("N%sative mode #%d\n",
edid[pos + i] & 0x80 ? "" : "on-n", idx);
}
+ } else if (type == 3 && len >= 3) {
+ /* Check Vendor Specific Data Block. For HDMI,
+ it is always 00-0C-03 for HDMI Licensing, LLC. */
+ if (edid[pos + 1] == 3 && edid[pos + 2] == 0xc &&
+ edid[pos + 3] == 0)
+ specs->misc |= FB_MISC_HDMI;
+ }
pos += len + 1;
}
diff --git a/include/linux/fb.h b/include/linux/fb.h
index d49c60f..427d49d 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -47,6 +47,7 @@ struct device_node;
#define FB_MISC_PRIM_COLOR 1
#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
+#define FB_MISC_HDMI 4
struct fb_chroma {
__u32 redx; /* in fraction of 1024 */
__u32 greenx;
--
1.8.3.2
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