Although the BW_BUDDY registers still exist, they are not used for anything on DG2. This change is expected to hold true for future dgpu's too.
Bspec: 49218 Signed-off-by: Matt Roper matthew.d.roper@intel.com --- drivers/gpu/drm/i915/display/intel_display_power.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index c34ff0947b85..df6358638fee 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -5814,6 +5814,10 @@ static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv) unsigned long abox_mask = INTEL_INFO(dev_priv)->abox_mask; int config, i;
+ /* BW_BUDDY registers are not used on dgpu's beyond DG1 */ + if (IS_DGFX(dev_priv) && !IS_DG1(dev_priv)) + return; + if (IS_ALDERLAKE_S(dev_priv) || IS_DG1_REVID(dev_priv, DG1_REVID_A0, DG1_REVID_A0) || IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))