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Linux/DRA77P: UB949 EDID support 1920x1080

Xiongwei Huang60
Prodigy 220 points
Part Number: DRA77P

Tool/software: Linux

Hello all 

out board use UB949+UB948 to support 1920x1080p DISPLAY,

While interel EDID in UB949 looks dont support this mode 

I only get 1280x720@60.0 and  1280x720@59.9

And from DRA76XP/TDA2XP evm scheme, your board Dont have external eeprom either ,

How do you support 1920x1080p mode ? modify kernel driver ?

Thanks and regards 

  • 0
    TI__Expert 7015 points

    What do you mean by <And from DRA76XP/TDA2XP evm scheme, your board Dont have external eeprom either>

    TISDK supports 1080p if the monitor exposes a 1080p in the EDID. If not, then you will need to modify the omapdrm driver to add a 1080p mode by calling drm_connector_probed_mode_add() forcefully.

    Regards,

    Subhajit

  • 0 in reply to Subhajit Paul
    Prodigy 220 points

    Hello Subhajit

    Thanks for your reply 

    From google I found another generic solution 

    and generate edid bin from linux kernel source folder in Documentation/EDID

    u-boot bootargs add "drm_kms_helper.edid_firmware=HDMI-A-1:edid/1920x1080.bin"

    and maybe this would be the generic solution for different types of panel 

    hope its helpful

    Thanks anyway