Re: [PATCH] drm/amdgpu/display: Protect some functions with CONFIG_DRM_AMD_DC_DCN

[Harry Wentland <harry.wentland@amd.com>]

On 2022-06-01 22:31, Alex Deucher wrote:
> Protect remove_hpo_dp_link_enc_from_ctx() and release_hpo_dp_link_enc()
> with CONFIG_DRM_AMD_DC_DCN as the functions are only called from code
> that is protected by CONFIG_DRM_AMD_DC_DCN.  Fixes build fail with
> -Werror=unused-function.
> 
> Fixes: 9b0e0d433f74 ("drm/amd/display: Add dependant changes for DCN32/321")
> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>

Reviewed-by: Harry Wentland <harry.wentland@amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
> index b087452e4590..a098fd0cb240 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
> @@ -1801,6 +1801,7 @@ static inline void retain_hpo_dp_link_enc(
>  	res_ctx->hpo_dp_link_enc_ref_cnts[enc_index]++;
>  }
>  
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>  static inline void release_hpo_dp_link_enc(
>  		struct resource_context *res_ctx,
>  		int enc_index)
> @@ -1808,6 +1809,7 @@ static inline void release_hpo_dp_link_enc(
>  	ASSERT(res_ctx->hpo_dp_link_enc_ref_cnts[enc_index] > 0);
>  	res_ctx->hpo_dp_link_enc_ref_cnts[enc_index]--;
>  }
> +#endif
>  
>  static bool add_hpo_dp_link_enc_to_ctx(struct resource_context *res_ctx,
>  		const struct resource_pool *pool,
> @@ -1832,6 +1834,7 @@ static bool add_hpo_dp_link_enc_to_ctx(struct resource_context *res_ctx,
>  	return pipe_ctx->link_res.hpo_dp_link_enc != NULL;
>  }
>  
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>  static void remove_hpo_dp_link_enc_from_ctx(struct resource_context *res_ctx,
>  		struct pipe_ctx *pipe_ctx,
>  		struct dc_stream_state *stream)
> @@ -1845,6 +1848,7 @@ static void remove_hpo_dp_link_enc_from_ctx(struct resource_context *res_ctx,
>  		pipe_ctx->link_res.hpo_dp_link_enc = NULL;
>  	}
>  }
> +#endif
>  
>  /* TODO: release audio object */
>  void update_audio_usage(