Banana Pi M2 HDMI No Signal

[aao]

Hi.

I got NO SIGNAL on my TV during boot after "Starting kernel".

Same with dev image builded from tool and with stable image too.

Thanks.

[Igor]

How do you power the board?

[aao]

Just plug in adapter to the board.

With 5.23 hdmi was ok

[aao]

Still no signal on tv. But wifi is working now, and i got this log - http://sprunge.us/SGZV

[johnrego]

When it starts the Armbian logo appears, then the hdmi signal is cut off and BPI-M2 no longer plays video. This is mine current situation

[Igor]

It's a know bug to all boards featuring A31. Status:

https://groups.google.com/forum/#!topic/linux-sunxi/L9oBoyj0MsA

[johnrego]

It really is a bug. Does anyone have any simple solutions to solve this?

[Igor]

7 minutes ago, johnrego said:

 

It really is a bug. Does anyone have any simple solutions to solve this?

 

No fix, downgrade / old versions = workaround.

[SokolovMikhail]

try

/drivers/clk/sunxi-ng/ccu-sun6i-a31.c

change

 

static SUNXI_CCU_GATE(hdmi_ddc_clk, "hdmi-ddc", "osc24M", 0x150, BIT(31), 0);

to

static SUNXI_CCU_GATE(hdmi_ddc_clk, "hdmi-ddc", "osc24M", 0x150, BIT(30), 0);

 

[Igor]

Nope, that didn't help. 

Thanks.

[zador.blood.stained]

6 minutes ago, Igor said:

Nope, that didn't help. 

 

Hm. This patch landed to linux-next: https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=9ad0bb39fce319d7b92c17d306ed0a9f70a02e7d

[Igor]

Double checked. Not working for me.

[zador.blood.stained]

2 minutes ago, Igor said:

Double checked. Not working for me.

Does it work with "clk_ignore_unused" added to kernel command line?

[Igor]

Bingo! That works 

 

Safe to add permanently?

[zador.blood.stained]

Just now, Igor said:

Bingo! That works 

It's not exactly "bingo", it means that something is still wrong with simplefb node or clocks definitions. Maybe you should ask wens on IRC about this since he made the patch I linked previously.

[palmatown]

I am hitting the same bug on the M2.  This was working about a month ago and at some point stopped so I loaded a different image from BPI site with no problems.  Adjusting "clk_ignore_unused" in kernel command line is something I haven't done before (based on a quick I search I did). Anyone have a link I could use to see how to do this?  I'll try anything   Thanks.

[zador.blood.stained]

@Igor https://groups.google.com/forum/#!topic/linux-sunxi/kztLGFTBgZw