22 Sep
2021
22 Sep
'21
8:25 p.m.
On Wed, Sep 22, 2021 at 1:19 PM Sudip Mukherjee sudipm.mukherjee@gmail.com wrote:
I added some debugs to print the addresses, and I am getting: [ 38.813809] sudip crtc 0000000000000000
This is from struct drm_crtc *crtc = connector->state->crtc;
Yeah, that was my personal suspicion, because while the line number implied "crtc->state" being NULL, the drm data structure documentation and other drivers both imply that "crtc" was the more likely one.
I suspect a simple
if (!crtc) return;
in vc4_hdmi_set_n_cts() is at least part of the fix for this all, but I didn't check if there is possibly something else that needs to be done too.
Linus