| 10:45 | topi`> | does anyone understand why I get a blank screen on my buildroot (on HDMI) even though a kernel message appears: "imx-drm display-subsystem: fb0: frame buffer device" |
| 10:45 | topi`> | it's possibly inactive since my monitor shows No signal text. I should try with another monitor... |
| 10:46 | topi`> | might this be related that I'm not using fbcon? the onnly console is ttymxc0 |
| 10:49 | topi`> | OK I can't write to /dev/fb0 with dd so I bet it's broken/unusable |
| 10:51 | topi`> | Console: switching to colour frame buffer device 128x48 |
| 10:51 | topi`> | it |
| 10:51 | topi`> | it *does* seem to be able to output graphics to HDMI |
| 11:11 | vpeter> | Few days someone mentioned booting Cortex-M4 on the i.MX8. Seems it can be done from u-boot: https://emcraft.com/som/imx-8m/using-cortex-m4-from-linux |
| 11:27 | jnettlet[m]> | it should probably be done from ATF |
| 11:27 | jnettlet[m]> | I believe like the 8040 the powermanagement firmware runs on the M4 |
| 12:05 | bencoh> | jnettlet[m]: uh ... meaning you have no other choice but keep m4 running even in suspend state? |
| 12:05 | bencoh> | (even when chip is supposed to be in suspend state, that is) |
| 12:11 | jnettlet[m]> | can't answer definitively yet, but most likely yes. The m4 has auto power management though. |
| 12:12 | jnettlet[m]> | the a53's would consume way more power in WFI with devices configured to wake it up than the m4 would |