Commit 47753748 authored by Matt Roper's avatar Matt Roper
Browse files

drm/i915/dg2: Don't program BW_BUDDY registers 



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: default avatarMatt Roper <matthew.d.roper@intel.com>
Reviewed-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210721223043.834562-17-matthew.d.roper@intel.com
parent 49f75634

drivers/gpu/drm/i915/display/intel_display_power.c

+4 −0
Original line number Diff line number Diff line
@@ -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_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||

	    IS_RKL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||