[v2,1/2] drm/msm/dpu1: don't choke on disabling the writeback connector

[György Kurucz]

Dear Dmitry,

For context, I have a Lenovo Yoga Slim 7x laptop, and was having issues 
with the display staying black after sleep. As a workaround, I could 
switch to a different VT and back.

> [ 1185.831970] [dpu error]connector not connected 3

I can confirm that I was seeing this exact error message as well.

>   	if (!conn_state || !conn_state->connector) {
>   		DPU_ERROR("invalid connector state\n");
>   		return -EINVAL;
> -	} else if (conn_state->connector->status != connector_status_connected) {
> -		DPU_ERROR("connector not connected %d\n", conn_state->connector->status);
> -		return -EINVAL;
>   	}
>   
>   	crtc = conn_state->crtc;

After applying this patch, the screen now resumes successfully, and the 
errors are gone.

(For future reference, I am using this kernel: 
https://github.com/jhovold/linux/commits/wip/x1e80100-6.11-rc5/, commit 
cc2cb95cc77fec43edd407c993122085fa8c2dd7.)

Tested-by: György Kurucz <me at kuruczgy.com>

Best regards,
György