[RFC PATCH 07/97] drm/i915/guc: Remove sample_forcewake h2g action

[Matthew Brost]

On Thu, May 06, 2021 at 12:13:21PM -0700, Matthew Brost wrote:
> From: Rodrigo Vivi <rodrigo.vivi at intel.com>
> 
> 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 at intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>

Reviewed-by: Matthew Brost <matthew.brost at intel.com>

> ---
>  drivers/gpu/drm/i915/gt/uc/intel_guc.c      | 16 ----------------
>  drivers/gpu/drm/i915/gt/uc/intel_guc.h      |  1 -
>  drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h |  4 ----
>  drivers/gpu/drm/i915/gt/uc/intel_uc.c       |  4 ----
>  4 files changed, 25 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> index adae04c47aab..ab2c8fe8cdfa 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> +++ b/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
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> index bc2ba7d0626c..c20f3839de12 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> +++ b/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);
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> index 79c560d9c0b6..0f9afcde1d0b 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> +++ b/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,
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> index 892c1315ce49..ab0789d66e06 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> +++ b/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);
>  
> -- 
> 2.28.0
>