drm/i915/guc: Remove sample_forcewake h2g action

This action is no-op in the GuC side for a few versions already
and it is getting entirely removed soon, in an upcoming version.

Time to remove before we face communication issues.

Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NMatthew Brost <matthew.brost@intel.com>
Acked-by: NMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: NMatthew Brost <matthew.brost@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210603051630.2635-5-matthew.brost@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc.c

@@ -469,22 +469,6 @@ int intel_guc_to_host_process_recv_msg(struct intel_guc *guc,
 	return 0;
 }
 
-int intel_guc_sample_forcewake(struct intel_guc *guc)
-{
-	struct drm_i915_private *dev_priv = guc_to_gt(guc)->i915;
-	u32 action[2];
-
-	action[0] = INTEL_GUC_ACTION_SAMPLE_FORCEWAKE;
-	/* WaRsDisableCoarsePowerGating:skl,cnl */
-	if (!HAS_RC6(dev_priv) || NEEDS_WaRsDisableCoarsePowerGating(dev_priv))
-		action[1] = 0;
-	else
-		/* bit 0 and 1 are for Render and Media domain separately */
-		action[1] = GUC_FORCEWAKE_RENDER | GUC_FORCEWAKE_MEDIA;
-
-	return intel_guc_send(guc, action, ARRAY_SIZE(action));
-}
-
 /**
  * intel_guc_auth_huc() - Send action to GuC to authenticate HuC ucode
  * @guc: intel_guc structure

drivers/gpu/drm/i915/gt/uc/intel_guc.h

@@ -128,7 +128,6 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len,
 			u32 *response_buf, u32 response_buf_size);
 int intel_guc_to_host_process_recv_msg(struct intel_guc *guc,
 				       const u32 *payload, u32 len);
-int intel_guc_sample_forcewake(struct intel_guc *guc);
 int intel_guc_auth_huc(struct intel_guc *guc, u32 rsa_offset);
 int intel_guc_suspend(struct intel_guc *guc);
 int intel_guc_resume(struct intel_guc *guc);

drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h

@@ -302,9 +302,6 @@ struct guc_ct_buffer_desc {
 #define GUC_CT_MSG_ACTION_SHIFT			16
 #define GUC_CT_MSG_ACTION_MASK			0xFFFF
 
-#define GUC_FORCEWAKE_RENDER	(1 << 0)
-#define GUC_FORCEWAKE_MEDIA	(1 << 1)
-
 #define GUC_POWER_UNSPECIFIED	0
 #define GUC_POWER_D0		1
 #define GUC_POWER_D1		2
@@ -558,7 +555,6 @@ enum intel_guc_action {
 	INTEL_GUC_ACTION_ENTER_S_STATE = 0x501,
 	INTEL_GUC_ACTION_EXIT_S_STATE = 0x502,
 	INTEL_GUC_ACTION_SLPC_REQUEST = 0x3003,
-	INTEL_GUC_ACTION_SAMPLE_FORCEWAKE = 0x3005,
 	INTEL_GUC_ACTION_AUTHENTICATE_HUC = 0x4000,
 	INTEL_GUC_ACTION_REGISTER_COMMAND_TRANSPORT_BUFFER = 0x4505,
 	INTEL_GUC_ACTION_DEREGISTER_COMMAND_TRANSPORT_BUFFER = 0x4506,

drivers/gpu/drm/i915/gt/uc/intel_uc.c

@@ -502,10 +502,6 @@ static int __uc_init_hw(struct intel_uc *uc)
 
 	intel_huc_auth(huc);
 
-	ret = intel_guc_sample_forcewake(guc);
-	if (ret)
-		goto err_log_capture;
-
 	if (intel_uc_uses_guc_submission(uc))
 		intel_guc_submission_enable(guc);