• Rodrigo Vivi's avatar
    drm/i915: WA: FBC Render Nuke. · fd3da6c9
    Rodrigo Vivi authored
    WaFbcNukeOn3DBlt for IVB, HSW.
    
    According BSPec: "Workaround: Do not enable Render Command Streamer tracking for FBC.
    Instead insert a LRI to address 0x50380 with data 0x00000004 after the PIPE_CONTROL that
    follows each render submission."
    
    v2: Chris noticed that flush_domains check was missing here and also suggested to do
        LRI only when fbc is enabled. To avoid do a I915_READ on every flush lets use the
        module parameter check.
    
    v3: Adding Wa name as Damien suggested.
    
    v4: Ville noticed VLV doesn't support fbc at all and comment came wrong from spec.
    
    v5: Ville noticed than on blt a Cache Clean LRI should be used instead the Nuke one.
    
    v6: Check for flush domain on blt (by Ville).
        Check for scanout dirty (by Chris).
    
    v7: Apply proper fbc_dirty implemented by Chris.
    
    v8: remove unused variables.
    
    Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
    Cc: Chris Wilson <chris@chris-wilson.co.uk>
    Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@gmail.com>
    Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
    Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    fd3da6c9
intel_pm.c 155 KB