Re: [PATCH] drm/msm/dpu: always program dsc active bits

[Marijn Suijten]

On 2023-04-12 10:33:15, Abhinav Kumar wrote:
[..]
> > What happens if a device boots without DSC panel connected?  Will
> > CTL_DSC_FLUSH be zero and not (unnecessarily, I assume) flush any of the
> > DSC blocks?  Or could this flush uninitialized state to the block?
> > 
> 
> If we bootup without DSC panel connected, the kernel's cfg->dsc will be 
> 0 and default register value of CTL_DSC_FLUSH will be 0 so it wont flush 
> any DSC blocks.

Ack, that makes sense.  However, if I connect a DSC panel, then
disconnect it (now the register should be non-zero, but cfg->dsc will be
zero), and then replug a non-DSC panel multiple times, it'll get flushed
every time because we never clear CTL_DSC_FLUSH after that?

> Sure, as I wrote in the other response, we can move this 
> to reset_intf_cfg later when the other pieces are fixed. And leave a 
> FIXME here.

Kuogee forgot to CC me on this patchs so I did not read/receive that
side of the email thread.  Will catch up before reviewing v2.

- Marijn