Revert "drm/xe/lnl: Enable GuC SLPC DCC task"

This reverts commit 50554bf3e56dd0c78ef1eedb685d0ab36c9c9987.

DCC in LNL should be disabled. It was a mistake to decide
to go against GuC platform defaults in this case and this
could lead to regressions in some TDP limited scenarios
instead of helping.

Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Cc: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250128223248.660748-1-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_guc_pc.c b/drivers/gpu/drm/xe/xe_guc_pc.c
index 44b5211..43f9617 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc_pc.c
+++ b/drivers/gpu/drm/xe/xe_guc_pc.c
@@ -993,27 +993,6 @@ out:
        return ret;
 }
 
-static int slpc_enable_dcc(struct xe_guc_pc *pc)
-{
-       int ret;
-
-       ret = pc_action_set_param(pc, SLPC_PARAM_TASK_ENABLE_DCC, 1);
-       if (ret)
-               return ret;
-
-       return pc_action_set_param(pc, SLPC_PARAM_TASK_DISABLE_DCC, 0);
-}
-
-static int slpc_set_policies(struct xe_guc_pc *pc)
-{
-       struct xe_device *xe = pc_to_xe(pc);
-
-       if (xe->info.platform == XE_LUNARLAKE)
-               return slpc_enable_dcc(pc);
-
-       return 0;
-}
-
 /**
  * xe_guc_pc_start - Start GuC's Power Conservation component
  * @pc: Xe_GuC_PC instance
@@ -1058,10 +1037,6 @@ int xe_guc_pc_start(struct xe_guc_pc *pc)
                goto out;
        }
 
-       ret = slpc_set_policies(pc);
-       if (ret)
-               goto out;
-
        ret = pc_init_freqs(pc);
        if (ret)
                goto out;