[Intel-gfx] [PATCH 22/27] drm/i915/pxp: Expose session state for display protection flip

[Anshuman Gupta]

On 2020-11-16 at 02:38:10 +0530, Huang, Sean Z wrote:
> Implement the intel_pxp_gem_object_status() to allow ring0 i915
> display querying the current PXP session state. In the design,
> ring0 display should not perform protection flip on the protected
> buffers if there is no PXP session alive.
> 
> Signed-off-by: Huang, Sean Z <sean.z.huang at intel.com>
> ---
>  drivers/gpu/drm/i915/pxp/intel_pxp.c | 8 ++++++++
>  drivers/gpu/drm/i915/pxp/intel_pxp.h | 2 ++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
> index 44d17ae27b94..05fe143675b1 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
> @@ -334,3 +334,11 @@ void intel_pxp_irq_handler(struct intel_gt *gt, u16 iir)
>  end:
>  	return;
>  }
> +
> +bool intel_pxp_gem_object_status(struct drm_i915_private *i915, u64 gem_object_metadata)
Currently this api used by Patch 27 of this series, uses gem object user flag (obj->user_flags) to
pass as gem_object_metadata but it is unused ? why do  we need this gem_object_metadata ?

Thanks,
Anshuman Gupta.
> +{
> +	if (i915->pxp.r0ctx && i915->pxp.r0ctx->flag_display_hm_surface_keys)
> +		return true;
> +	else
> +		return false;
> +}
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.h b/drivers/gpu/drm/i915/pxp/intel_pxp.h
> index c0119ccdab08..eb0e548ce434 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
> @@ -111,4 +111,6 @@ int i915_pxp_global_terminate_complete_callback(struct drm_i915_private *i915);
>  int intel_pxp_init(struct drm_i915_private *i915);
>  void intel_pxp_uninit(struct drm_i915_private *i915);
>  
> +bool intel_pxp_gem_object_status(struct drm_i915_private *i915, u64 gem_object_metadata);
> +
>  #endif
> -- 
> 2.17.1
> 
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