TMDSEVM572X: Changing HDMI resolution

Komala Chandrakumar

Part Number: TMDSEVM572X

Hi,

I am working with ti-processor-sdk-android-am57xx-evm-04.01.00.06. I need to change HDMI resolution to 1920x1080 and stop LCD display. I have tried setting

kernel bootargs 'omapdss.def_disp', 'omapfb.mode'
'omapdrm.displays=1'
modetest -s
Using wm command changed size
setprop hw.hdmi.resolution

But nothing works. In linux, to stop LCD display '/etc/init.d/weston stop' worked. Is there any command to do in android.

Please help me to solve this issue.

Thanks.

over 7 years ago

0 Margarita Gashova over 7 years ago

TI__Guru* 80190 points

Hello,

Please check these wiki pages:
processors.wiki.ti.com/.../Linux_Core_DSS_User's_Guide
processors.wiki.ti.com/.../Processor_Linux_SDK_Graphics_and_Display and
e2e.ti.com/.../638172

Hope this helps.
BR
Margarita

0 Komala Chandrakumar over 7 years ago in reply to Margarita Gashova

Prodigy 40 points

Hi,

I can see omapdrm gets loaded while ANDROID is booting. But setting omapdrm.displays=1 does not have any effect.

Thank you.

0 Komala Chandrakumar over 7 years ago in reply to Komala Chandrakumar

Prodigy 40 points

Hi,
I can set command 'video=HDMI-A-1:1920x1080' in bootargs and the following happens.

1) In file drivers/gpu/drm/drm_crtc.c, drm_connector_get_cmdline_mode() function gets the command line and process the options for that connector
2) Then from file drivers/gpu/drm/drm_atomic_helper.c, crtc_set_mode() function changes the resolution to 1280x720.

Please help me in solving this issue.

Thank you.

0 Praneeth Bajjuri over 7 years ago

TI__Expert 6256 points

Default release supports dual mirrored display (LCD +HDMI) with am57x-evm-reva3 dt file.

1) you should use the non-lcd dtb

for android hdmi only setup,

do the following after first boot :

http://processors.wiki.ti.com/index.php/6AO.1.0_Application_Notes#HDMI_only_setup

0 Komala Chandrakumar over 7 years ago in reply to Praneeth Bajjuri

Prodigy 40 points

Thank you Praneeth Bajjuri. I will check it out and come back to you if I have any queries.

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TMDSEVM572X: Changing HDMI resolution