how to setup DVI 720p60(RGBA32 or RGB24) in PSP03.00.01.06?

To switch from LCD to DVI at run time take a look at this wiki http://processors.wiki.ti.com/index.php/UserGuideDisplayDrivers_PSP_03.00.00.05.

Steve K.

Setting bootargs for 720P so you boot in that mode is described in that wiki also.

Steve K.

Hi Steve,

Thank you for your help.

I appended 'vram=20M omapfb.vram=0:20M' to bootargs.  Now I can do:

============================================================================

# echo 0 > /sys/devices/platform/omapdss/display0/enabled

# echo "" > /sys/devices/platform/omapdss/manager0/display

# fbset -fb /dev/fb0 -xres 1280 -yres 720 -vxres 1280 -vyres 720 -depth 32 -rgba 8/16,8/8,8/0,8/24

=============================================================================

When I tried to do:
# echo "dvi" > /sys/devices/platform/omapdss/manager0/display

I got:

omapdss MANAGER error: failed to set manager

==============================================================================

Could you help me to look at that?  I may need to do something in kernel config.

Many thanks in advance.

Jie Deng

 

Hi Punya,

Thank you many much for your help.

Your help is very close to 'verify answer'.

I appended ' omapfb.mode=dvi:1280x720MR-32@60 omapdss.def_disp=dvi' to bootargs.

The display is set to dvi 1280x720 32-bit depth.  I got

==================================================================

#fbset -s

mode "1280x720-60"
    # D: 64.000 MHz, H: 44.444 kHz, V: 59.979 Hz
    geometry 1280 720 1280 720 32
    timings 15625 80 48 3 13 32 5
    rgba 8/16,8/8,8/0,0/0
endmode

#cat /sys/devices/platform/omapdss/display2/timings
64000,1280/80/48/32,720/3/13/5

===================================================================

When I ran sample code 'saMmapLoopback' with NTSC/CVBS input, it ran well but I got

' omapdss DISPC error: GFX_FIFO_UNDERFLOW, disabling GFX' error message from

console.

Could you look at that?

Thanks in advance.

Jie Deng

1024x768 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

1024x768 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

 

Jie,

 

When you say the example application ran well, do you mean you can see the display on the dvi out? GFX_FIFO_UNDERFLOW generally occurs when you have the display resolution wrong or if you have your framebuffer rotation enable. I have tested it at my set up for this resolution and saMmapLoopback example works without any errors.

 

Regards, Punya

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Please click the Verify Answer button on this post if it answers your question.

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Hi Punya,

The DVI can display video as 480x720 at 1280x720.

I do not set rotation at bootargs.  I will check the kernel configure that I may do something there.

Thank you for your help.

Regards.

Jie Deng