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

[Sebastian Brzezinka]

On 2024-11-28 at 14:34:52 +0200, Ville Syrjälä wrote:
> 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

Here is entry from CI bug log:
https://gfx-ci.igk.intel.com/cibuglog-ng/issue/15525?query_key=ee712195d52aee24d7314c241ebbf8a8fd9d7370

This error is only reported when debug is enabled, and even then it doesn't fail the test.
-- 

Best regards,
Sebastian Brzezinka