[Intel-gfx] [PATCH v2] Revert "drm/i915/dg2: extend Wa_1409120013 to DG2"

[Lucas De Marchi]

This reverts commit 487970e8bb776c989013bb59d6cbb22e45b9afc6.

Updated bspec and workaround database note Wa_1409120013 is not needed
for DG2 (or any Xe_LPD) platform. Simply check by display version 12.

v2: Simplify condition check to display version (Matt Roper)

Cc: Matt Atwood <matthew.s.atwood at intel.com>
Cc: Clint Taylor <Clinton.A.Taylor at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
Reviewed-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 210c1f78cc90..eb9c54bbf51f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7614,9 +7614,8 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
 
 static void gen12lp_init_clock_gating(struct drm_i915_private *dev_priv)
 {
-	/* Wa_1409120013:tgl,rkl,adl-s,dg1,dg2 */
-	if (IS_TIGERLAKE(dev_priv) || IS_ROCKETLAKE(dev_priv) ||
-	    IS_ALDERLAKE_S(dev_priv) || IS_DG1(dev_priv) || IS_DG2(dev_priv))
+	/* Wa_1409120013 */
+	if (DISPLAY_VER(dev_priv) == 12)
 		intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A),
 				   DPFC_CHICKEN_COMP_DUMMY_PIXEL);
 
-- 
2.37.2