Re: [Intel-gfx] [PATCH] drm/i915: Don't read query SSEU for non-existent slice 0 on old platforms

On Fri, Nov 12, 2021 at 08:01:07AM -0800, Matt Roper wrote: > Pre-HSW platforms don't use the gt SSEU structures; this means that > calling intel_sseu_get_subslices() on slice 0 for these platforms will > trip a GEM_BUG_ON(slice >= sseu->max_slices) warning. > > Let's move the DSS lookup for a DG2

[PATCH] drm/i915: Don't read query SSEU for non-existent slice 0 on old platforms

Pre-HSW platforms don't use the gt SSEU structures; this means that calling intel_sseu_get_subslices() on slice 0 for these platforms will trip a GEM_BUG_ON(slice >= sseu->max_slices) warning. Let's move the DSS lookup for a DG2 workaround into a helper function that will only get called after we'