rk3288: Set HDMI display mode to 480p

If an HDMI display is detected (EDID can be read), set the
display mode to 480p. If for some reason 480p is not supported
then we'll fall back to the automatically detected display mode.

TEST=dev mode screen shows up on Mickey at 480p resolution

Change-Id: I2c431eff6673392d3c09e1b66c66ba12ecc6eeb0
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Original-Commit-Id: 76203a683c4501f368c50fe24101f68746ddb7f0
Original-Change-Id: I90dea37daa2d78628230d7d47f7ef0e917cbd7bb
Original-Signed-off-by: David Hendricks <dhendrix@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/290554
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/11392
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed