Re: [PATCH] drm/amd/display: fix DSC related non-x86/PPC64 compilation issue

[Alex Deucher]

On Thu, Aug 11, 2022 at 12:24 PM Hamza Mahfooz <hamza.mahfooz@xxxxxxx> wrote:
>
> Need to protect DSC code with CONFIG_DRM_AMD_DC_DCN.
> Fixes the following build errors on arm64:
> ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
>
> Fixes: 0087990a9f57 ("drm/amd/display: consider DSC pass-through during mode validation")
> Reported-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>

Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>

> ---
>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c    | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> index ef6c94cd852b..0c52c0867211 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> @@ -1387,8 +1387,6 @@ bool pre_validate_dsc(struct drm_atomic_state *state,
>         return (ret == 0);
>  }
>
> -#endif
> -
>  static unsigned int kbps_from_pbn(unsigned int pbn)
>  {
>         unsigned int kbps = pbn;
> @@ -1416,6 +1414,7 @@ static bool is_dsc_common_config_possible(struct dc_stream_state *stream,
>
>         return bw_range->max_target_bpp_x16 && bw_range->min_target_bpp_x16;
>  }
> +#endif /* CONFIG_DRM_AMD_DC_DCN */
>
>  enum dc_status dm_dp_mst_is_port_support_mode(
>         struct amdgpu_dm_connector *aconnector,
> @@ -1428,6 +1427,7 @@ enum dc_status dm_dp_mst_is_port_support_mode(
>         struct dc_dsc_bw_range bw_range = {0};
>         int bpp, pbn, branch_max_throughput_mps = 0;
>
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>         /*
>          * check if the mode could be supported if DSC pass-through is supported
>          * AND check if there enough bandwidth available to support the mode
> @@ -1461,13 +1461,16 @@ enum dc_status dm_dp_mst_is_port_support_mode(
>                         return DC_FAIL_BANDWIDTH_VALIDATE;
>                 }
>         } else {
> +#endif
>                 /* check if mode could be supported within full_pbn */
>                 bpp = convert_dc_color_depth_into_bpc(stream->timing.display_color_depth) * 3;
>                 pbn = drm_dp_calc_pbn_mode(stream->timing.pix_clk_100hz / 10, bpp, false);
>
>                 if (pbn > aconnector->port->full_pbn)
>                         return DC_FAIL_BANDWIDTH_VALIDATE;
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>         }
> +#endif
>
>         /* check is mst dsc output bandwidth branch_overall_throughput_0_mps */
>         switch (stream->timing.pixel_encoding) {
> --
> 2.37.1
>