Waveshare 4" hdmi display working with Retropie!

[nitesuh]

Here's the solution:

Before you start the LCD screen install on Retropie, you will need:

1.Retropie Image on your SD Card
2.LCD-show-161112.tar.gz file (http://www.waveshare.com/w/upload/4/4b/LCD-show-161112.tar.gz)
3.PuTTy
4.FileZilla client
5.Some Knowledge of using FileZilla client and putty

Go to retropie settings, then raspi config and turn SSH ON!
Then go to FileZilla and transfer LCD-show-161112.tar.gzr to pi's main folder.
Now go to putty and type, { sudo nano /boot/config.txt }.
Now remove what's in there and paste the following:

uncomment if you get no picture on HDMI for a default "safe" mode

#hdmi_safe=1

uncomment this if your display has a black border of unused pixels visible

and your display can output without overscan

#disable_overscan=1

uncomment the following to adjust overscan. Use positive numbers if console

goes off screen, and negative if there is too much border

#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

uncomment to force a console size. By default it will be display's size minus

overscan.

#framebuffer_width=1280
#framebuffer_height=720

uncomment if hdmi display is not detected and composite is being outputted

hdmi_force_hotplug=1

uncomment to force a specific HDMI mode (here we are forcing 800x480!)

hdmi_group=2
hdmi_mode=87
hdmi_cvt=480 800 60 6 0 0 0
hdmi_drive=2
max_usb_current=1
dtoverlay=ads7846,cs=1,penirq=25,penirq_pull=2,speed=50000,keep_vref_on=0,swapxy=0,pmax=255,xohms=150,xmin=200,xmax=3900,ymin=200,ymax=3900
display_rotate=3

uncomment to force a HDMI mode rather than DVI. This can make audio work in

DMT (computer monitor) modes

#hdmi_drive=2

uncomment to increase signal to HDMI, if you have interference, blanking, or

no display

config_hdmi_boost=4

uncomment for composite PAL

sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800