drm/i915/tgl: Report valid VDBoxes with SFC capability

In Gen11, only even numbered "logical" VDBoxes are hooked up to a SFC
(Scaler & Format Converter) unit. This is not the case in Tigerlake,
where each VDBox can access a SFC.

We will use this information to decide when the SFC units need to be reset
and also pass it to the GuC.

Bspec: 48077
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190731004902.34672-5-daniele.ceraolospurio@intel.com

diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index f99c9fd..2a39b52 100644 (file)
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -1022,8 +1022,9 @@ void intel_device_info_init_mmio(struct drm_i915_private *dev_priv)
                /*
                 * 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 (logical_vdbox++ % 2 == 0)
+               if (IS_TIGERLAKE(dev_priv) || logical_vdbox++ % 2 == 0)
                        RUNTIME_INFO(dev_priv)->vdbox_sfc_access |= BIT(i);
        }
        DRM_DEBUG_DRIVER("vdbox enable: %04x, instances: %04lx\n",