How to count the vram size

Hi Jason,

Normally the configuration is like this, depending on your application buffer requirements.

CONFIG_OMAP2_VRAM_SIZE = (w * l * bpp) * num_of_bufs / (1024*1024)

What is the use case? What is you environment variables?

AnilKumar

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Hi Anil

CONFIG_OMAP2_VRAM_SIZE = (w * l * bpp) * num_of_bufs / (1024*1024)

>>So TI EVM board set the vram size is 4MB. Equivalent to 640*480*18 *2/(1024*1024)=10.54Mbit, 10.54/8=1.32 MByte.So this is less than 4MB?

Above, whether there is any cognitive error?

My environment variables.(Android OS)

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setenv bootargs 'console=ttyO2,115200n8 androidboot.console=ttyO2 mem=512M root=/dev/mmcblk0p2 rw rootfstype=ext3 rootdelay=1 init=/init ip=off omap_vout.vid1_static_vrfb_alloc=y omapdss.def_disp=lcd omapfb.mode=lcd:800x480MR-16 vram=8M omapfb.vram=0:8M mpurate=1000'

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Thank you

Hi Jason,

jason58860 said:

>>So TI EVM board set the vram size is 4MB. Equivalent to 640*480*18 *2/(1024*1024)=10.54Mbit, 10.54/8=1.32 MByte.So this is less than 4MB?

Above, whether there is any cognitive error?

640*480*4*2/(1024*1024) = 2.34375M < 4M

From the boot args I can say that you are passing vram=8M, which is more than (1280*800*4*2/(1024 * 1024) = 7.8125), so it won't be any problem

 Regards
AnilKumar

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Hi Anil

640*480*4*2/(1024*1024) = 2.34375M < 4M

Why the red word is set to 4(32Bit)? I read 3715 and 3530 Technical Reference Manual is max 24bit in chapter 15.

Thank you

Jason