video: fbdev: Check Standard Timing against DMT

Add the VESA Display Monitor Timing (DMT) table.
During parsing of Standard Timings, it compare the 2 byte STD code
with DMT to see what the VESA mode should be.  If there is no entry
in the vesa_modes table or no match found, it fallsback to the
GTF timings.

Signed-off-by: David Ung <davidu@nvidia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/fb.h b/include/linux/fb.h
index 882dbd1a87b7..043f3283b71c 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -727,6 +727,8 @@ extern int fb_videomode_from_videomode(const struct videomode *vm,
 
 /* drivers/video/modedb.c */
 #define VESA_MODEDB_SIZE 43
+#define DMT_SIZE 0x50
+
 extern void fb_var_to_videomode(struct fb_videomode *mode,
                                 const struct fb_var_screeninfo *var);
 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
@@ -777,9 +779,17 @@ struct fb_videomode {
         u32 flag;
 };
 
+struct dmt_videomode {
+        u32 dmt_id;
+        u32 std_2byte_code;
+        u32 cvt_3byte_code;
+        const struct fb_videomode *mode;
+};
+
 extern const char *fb_mode_option;
 extern const struct fb_videomode vesa_modes[];
 extern const struct fb_videomode cea_modes[64];
+extern const struct dmt_videomode dmt_modes[];
 
 struct fb_modelist {
         struct list_head list;