video: fbmon: add HDMI dectetion to fbmod edid parsing

Looks for ieee registration numver 0x000c03 as per HDMI spec.

Change-Id: I6875b24c66e8754510edabcb4f9ba682a50d6ac1
Signed-off-by: Erik Gilling <konkers@android.com>

diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c
index 0841e6b27e5c7a21684b36a745b514029044c39e..18dad1dd9fb7ba8b96f2dffc041742a8660c4c17 100644 (file)
--- a/drivers/video/fbmon.c
+++ b/drivers/video/fbmon.c
@@ -1018,6 +1018,13 @@ void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
                                        num++;
                                }
                        }
+               } else if (tag == 0x3) {
+                       if (len >= 3) {
+                               u32 ieee_reg = block[0] | (block[1] << 8) |
+                                       (block[2] << 16);
+                               if (ieee_reg == 0x000c03)
+                                       specs->misc |= FB_MISC_HDMI;
+                       }
                }
 
                block += len;

diff --git a/include/linux/fb.h b/include/linux/fb.h
index 8b1f0a982bdbbdfd37df456e1f332aea8a04139a..6654459e81af82a791a789e5d177f16cca6001c0 100644 (file)
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -437,6 +437,8 @@ struct file;
 
 #define FB_MISC_PRIM_COLOR     1
 #define FB_MISC_1ST_DETAIL     2       /* First Detailed Timing is preferred */
+#define FB_MISC_HDMI           4       /* display supports HDMI signaling */
+
 struct fb_chroma {
        __u32 redx;     /* in fraction of 1024 */
        __u32 greenx;