iMX53 Android 2.3 dualview quality

[DeanHuang]

I use Andrioid 2.3 and bootargs “setenv dualview 'setenv bootargs ${bootargs} di1_primary video=mxcdi1fb:GBR24,VGA-SXGA vga video=mxcdi0fb:RGB24,640x480M@60 hdmi pmem=64M,64M fbmem=8M gpu_memory=64M'”

for dual display on imx53. I got full contents of the Android desktop on HDMI but the desktop seems to be scaled and the quality is bad.

I would like to ask :

1. 1. I guess the HDMI content is scaled down from 1280x1024(SXGA) to 640x480, is that true?
2. 2. If 1 is true, where is the scale task performed (ex: which module of IPU?)?
3. 3. Is there any possible way to improve the quality on HDMI in my case?

Thanks for your kindly reply ^^

[daiane_angolini]

Have you tried to change your kernel command line?

[karina_valencia]

No update from customer