Pi Firmware: Atom config 1600x1200 with 2.5x scaling

Change-Id: I2da397698851982aeebdd7d3880c1ecca22602bd

src/scripts/cmdline.txt

@@ -145,5 +145,7 @@
 # Here's an example that might work with a UK 101
 #sampling06=4 geometry06=23,26,100,270,800,540 info=1 palette=0 deinterlace=0 scanlines=0 mux=0 elk=0 vsync=0 pllh=0 nbuffers=2 debug=1 m7disable=1
 #
-# Here's an example that might work with an Atom (CPLDv1)
-sampling06=5 geometry06=3,37,66,200,528,400,85909091,5472,524,0 nbuffers=2 m7disable=1
+# Here's an example that might work with an Atom (CPLDv1) (narrow border)
+#sampling06=5 geometry06=3,37,66,200,528,400,85909091,5472,524,0 nbuffers=2 m7disable=1
+# Here's an example that might work with an Atom (CPLDv1) (wider border)
+sampling06=5 geometry06=0,31,69,212,552,424,85909091,5472,524,0 nbuffers=2 m7disable=1

src/scripts/config.txt

@@ -296,12 +296,27 @@ disable_overscan=1
 ##   l/r overscan = (1600-1584)/2 = 8
 ##   t/b overscan = (1200-1200)/2 = 0
 ##
+#hdmi_group=2
+#hdmi_mode=51
+#overscan_left=8
+#overscan_right=8
+#overscan_top=0
+#overscan_bottom=0
+
+## Example Atom Setting (scaling by 2.5)
+##
+## 1600x1200 @ 60Hz
+##
+## Scale by 1:3 - 552x424 => 1380x1060
+##   l/r overscan = (1600-1380)/2 = 110
+##   t/b overscan = (1200-1060)/2 = 70
+##
 hdmi_group=2
 hdmi_mode=51
-overscan_left=8
-overscan_right=8
-overscan_top=0
-overscan_bottom=0
+overscan_left=110
+overscan_right=110
+overscan_top=70
+overscan_bottom=70
 
 # Further notes....
 #