On 17/03/14 15:22, Dmitry Lifshitz wrote:
> Hi Tomi,
> 
> Thank you for the feedback.
> 
> We have OMAP5 based board with no ESD & Level Translator chip.
> So, I made a quick hack in tpd12s015 driver to skip using un-relevant
> GPIOs.

If you don't have tpd12s015 on your board, don't modify it. Remove it
from your board's dts file totally.

> I've copied DSS DT structure from uEmv board *.dts.
> However the HDMI output is not activate yet.
> 
> Here is some debug output:
> 
> root@cm-debian:~# dmesg | grep -i dss
> [    0.040554] omap_hwmod: dss_dispc: cannot be enabled for reset (3)
> [    0.043135] omap_hwmod: dss_dsi1: cannot be enabled for reset (3)
> [    0.045725] omap_hwmod: dss_dsi2: cannot be enabled for reset (3)
> [    0.048311] omap_hwmod: dss_hdmi: cannot be enabled for reset (3)
> [    0.050888] omap_hwmod: dss_rfbi: cannot be enabled for reset (3)
> [    0.325392] DSS: set fck to 192000000
> [    0.325400] DSS: dss_runtime_get
> [    0.325427] DSS: dss_restore_context
> [    0.325445] OMAP DSS rev 6.1
> [    0.325450] DSS: dss_runtime_put
> [    0.325456] DSS: dss_save_context
> [    0.325461] DSS: context saved
> [    0.325707] DSS: dss_restore_context
> [    0.325711] DSS: context restored
> [    0.325746] omapdss_dispc 58001000.dispc: OMAP DISPC rev 5.1
> [    0.325838] DSS: dss_save_context
> [    0.325843] DSS: context saved
> 
> 
> I do not use uEvm BSP u-Boot. I'm forking from this source:
> git://git.denx.de/u-boot-ti.git
> 
> Perhaps I'm missing some clocks initialization?
> What are the correct bootargs for activating HDMI video output?

HDMI is the only output on the uevm, and if your board is similar, no
boot args are needed. But, of course, you need omapfb or omapdrm to
manage the display.

 Tomi