How to change the resolution of display device run-time on DM8168?

Anoop B S

I am working on a display system and my device has to support full-screen display of 1080p60 as well as 720p60 resolutions.

I inserted the VPSS kernel object using the command (a) given below. Using the command (a), my display device gets set to 1080p60 resolution and if i configure the VFDC component to 720p60 with the same vpss setting, the 720p frame is displayed in a 1080 window.

(a) insmod vpss.ko sbufaddr=0xBFB00000 i2c_mode=1

When I changed the options while inserting VPSS ko, as given in (b), I got a full-screen display for 720 resolution.

(b) insmod vpss.ko sbufaddr=0xBFB00000 i2c_mode=1 mode=hdmi:720p-60,dvo2:720p-60,hd

But to do the same, I have to exit my application, remove the module and re-insert it with the new options. Is it possible to do this change run-time from my application using some system call? Or is there any setting that I can change for the OMX component to support the same??

Thanks

Anoop

over 13 years ago

0 Steve Clynes over 13 years ago

TI__Mastermind 43875 points

Anoop,

Check here fordetails on the video driver.

http://ap-fpdsp-swapps.dal.design.ti.com/index.php/TI814X-VPSS-Video-Driver-UserGuide_PSP_04.01.00.03

Specifically...

http://ap-fpdsp-swapps.dal.design.ti.com/index.php/TI814X-VPSS-Video-Driver-UserGuide_PSP_04.01.00.03#Change_the_mode_on_HDMI_VENC.28display0.29

BR,

Steve

0 Anoop B S over 13 years ago in reply to Steve Clynes

Prodigy 100 points

Steve,

I was unable to access the links provided by you. I get a HTTP 404 Not Found error. It would be good if I get a working link.

Regards

Anoop

0 HardikShah over 13 years ago in reply to Anoop B S

TI__Mastermind 20245 points

Hi,

This is internal link. You can view this externally at http://processors.wiki.ti.com/index.php/DM81XX_AM38XX_VPSS_Video_Driver_User_Guide. Resolution change is possible after stopping all V4L2 display and fbdev nodes connected to a particular display where you want resolution change.

Regards,

Hardik shah

0 Anoop B S over 13 years ago in reply to HardikShah

Prodigy 100 points

Steve / Hardik,

Thanks for your help. I am now able to get the display configuration I needed.

Regards

Anoop

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How to change the resolution of display device run-time on DM8168?