[PATCH 2/7] drm/i915: Disable compression tricks on JSL

[Ville Syrjälä]

On Wed, Nov 27, 2024 at 03:56:27PM +0000, Sebastian Brzezinka wrote:
> 
> Hi Ville
> 
> I found your patch looking at issue VLK-65591, seems like for some reason
> cannot apply this workaround on JasperLake and end up with an error: 
> 
> ```
> <3> [463.126159] i915 0000:00:02.0: [drm] ERROR GT0: engine workaround lost on application! (reg[7000]=0x0, relevant bits were 0x0 vs expected 0x8000)
> 
> ```
> 
> When the workaround is verified, 15th bit is not set. Is it possible that
> this workaround is not available ? I would be grateful for any tips.

I suppose it's possible the spec is wrong and the bit doesn't exist, or
perhaps it's only present on some steppings. Shrug.

I'm not seeing any problems being reported in CI however, so I'm a bit
confused where these are happening?

-- 
Ville Syrjälä
Intel