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 <redacted>
---
 drivers/video/fbdev/core/fbmon.c  | 20 ++++++----
 drivers/video/fbdev/core/modedb.c | 84 +++++++++++++++++++++++++++++++++++++++
 include/linux/fb.h                | 10 +++++
 3 files changed, 107 insertions(+), 7 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmon.c b/drivers/video/fbdev/core/fbmon.c
index 5b0e313..aa1110a 100644
--- a/drivers/video/fbdev/core/fbmon.c
+++ b/drivers/video/fbdev/core/fbmon.c

@@ -526,16 +526,22 @@ static int get_std_timing(unsigned char *block, struct fb_videomode *mode,
 	refresh = (block[1] & 0x3f) + 60;
 
 	DPRINTK("      %dx%d@%dHz\n", xres, yres, refresh);
-	for (i = 0; i < VESA_MODEDB_SIZE; i++) {
-		if (vesa_modes[i].xres == xres &&
-		    vesa_modes[i].yres == yres &&
-		    vesa_modes[i].refresh == refresh) {
-			*mode = vesa_modes[i];
+	for (i = 0; i < DMT_SIZE; i++) {
+		u32 std_2byte_code = block[0] << 8 | block[1];
+
+		if (std_2byte_code == dmt_modes[i].std_2byte_code) {
+			if (!dmt_modes[i].mode)
+				break;
+			*mode = *dmt_modes[i].mode;
 			mode->flag |= FB_MODE_IS_STANDARD;
-			return 1;
+			DPRINTK("        DMT id=%d\n", dmt_modes[i].dmt_id);
+			break;
 		}
 	}
-	calc_mode_timings(xres, yres, refresh, mode);
+
+	if (i == DMT_SIZE || !dmt_modes[i].mode)
+		calc_mode_timings(xres, yres, refresh, mode);
+
 	return 1;
 }
 

diff --git a/drivers/video/fbdev/core/modedb.c b/drivers/video/fbdev/core/modedb.c
index 0b57c1df..858a97e 100644
--- a/drivers/video/fbdev/core/modedb.c
+++ b/drivers/video/fbdev/core/modedb.c

@@ -497,6 +497,90 @@ const struct fb_videomode vesa_modes[] = {
 	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 };
 EXPORT_SYMBOL(vesa_modes);
+
+const struct dmt_videomode dmt_modes[DMT_SIZE] = {
+	{ 0x01, 0x0000, 0x000000, &vesa_modes[0] },
+	{ 0x02, 0x3119, 0x000000, &vesa_modes[1] },
+	{ 0x03, 0x0000, 0x000000, &vesa_modes[2] },
+	{ 0x04, 0x3140, 0x000000, &vesa_modes[3] },
+	{ 0x05, 0x314c, 0x000000, &vesa_modes[4] },
+	{ 0x06, 0x314f, 0x000000, &vesa_modes[5] },
+	{ 0x07, 0x3159, 0x000000, &vesa_modes[6] },
+	{ 0x08, 0x0000, 0x000000, &vesa_modes[7] },
+	{ 0x09, 0x4540, 0x000000, &vesa_modes[8] },
+	{ 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
+	{ 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
+	{ 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
+	{ 0x0d, 0x0000, 0x000000, 0 },
+	{ 0x0e, 0x0000, 0x000000, 0 },