From: Venkata Sandeep Dhanalakota venkata.s.dhanalakota@intel.com
In Gen12 there are various fuse combinations and in each configuration vdbox engine may be connected to SFC depending on which engines are available, so we need to set the SFC capability based on fuse value from the hardware. Even numbered phyical instance always have SFC, odd numbered physical instances have SFC only if previous even instance is fused off.
Bspec: 48028 Cc: Tvrtko Ursulin tvrtko.ursulin@intel.com Cc: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Signed-off-by: Venkata Sandeep Dhanalakota venkata.s.dhanalakota@intel.com Signed-off-by: Matt Roper matthew.d.roper@intel.com --- drivers/gpu/drm/i915/gt/intel_engine_cs.c | 30 ++++++++++++++++++----- 1 file changed, 24 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index 151870d8fdd3..4ab2c9abb943 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -442,6 +442,28 @@ void intel_engines_free(struct intel_gt *gt) } }
+static inline +bool vdbox_has_sfc(struct drm_i915_private *i915, unsigned int physical_vdbox, + unsigned int logical_vdbox, u16 vdbox_mask) +{ + /* + * In Gen11, only even numbered logical VDBOXes are hooked + * up to an SFC (Scaler & Format Converter) unit. + * In Gen12, Even numbered phyical instance always are connected + * to an SFC. Odd numbered physical instances have SFC only if + * previous even instance is fused off. + */ + if (GRAPHICS_VER(i915) == 12) { + return (physical_vdbox % 2 == 0) || + !(BIT(physical_vdbox - 1) & vdbox_mask); + } else if (GRAPHICS_VER(i915) == 11) { + return logical_vdbox % 2 == 0; + } + + MISSING_CASE(GRAPHICS_VER(i915)); + return false; +} + /* * Determine which engines are fused off in our particular hardware. * Note that we have a catch-22 situation where we need to be able to access @@ -493,13 +515,9 @@ static intel_engine_mask_t init_engine_mask(struct intel_gt *gt) continue; }
- /* - * In Gen11, only even numbered logical VDBOXes are - * hooked up to an SFC (Scaler & Format Converter) unit. - * In TGL each VDBOX has access to an SFC. - */ - if (GRAPHICS_VER(i915) >= 12 || logical_vdbox++ % 2 == 0) + if (vdbox_has_sfc(i915, i, logical_vdbox, vdbox_mask)) gt->info.vdbox_sfc_access |= BIT(i); + logical_vdbox++; } drm_dbg(&i915->drm, "vdbox enable: %04x, instances: %04lx\n", vdbox_mask, VDBOX_MASK(gt));