Re: [PATCH v9 2/4] drm/msm/dp: Support only IRQ_HPD and REPLUG interrupts for eDP

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Doug

On 4/22/2022 9:10 AM, Doug Anderson wrote:
Hi,

On Fri, Apr 22, 2022 at 9:05 AM Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:

Hi Doug

For the lockdep error, the splat looks similar to what kuogee fixed
recently.

Can you please check if below patch is present in your tree?

https://patchwork.freedesktop.org/patch/481396/

Indeed I did have that in my tree already, but the lockdep splat is
still there. I think the problem is that we're now calling
dp_hpd_plug_handle() directly in dp_bridge_enable()

-Doug

Yes, now i understood this particular issue better and not sure how this wasn't caught. Perhaps some difference in the USE flags. Sankeerth didnt have lockdebug and thats why didnt hit this.

I have discussed with kuogee about why this change is needed and why this wasnt being done in get_modes().

It seems like originally, this was done for a quirk in the DP compliance equipment that it did not publish the fail safe mode ( even though some other modes were present ). Typically, any sink (as long as EDID read went through ) adds the 640x480 fail safe mode.

We could have done it in get_modes() even earlier but not sure how it was missed or was there some other reason.

Nonetheless, kuogee will post the change to move this to get_modes() shortly.

Thanks

Abhinav



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [Linux for Sparc]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux