drm/amd/display: Query GECC enable for SubVP disable

- We want to disable SubVP if Graphics Error Correction/Correcting Code
  (GECC) is enabled.
- After reading feature caps from DMCUB during init, use the GECC
  enable/disable info to determine if SubVP can be enabled or not.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc.h

@@ -210,6 +210,7 @@ struct dc_dmub_caps {
 	bool psr;
 	bool mclk_sw;
 	bool subvp_psr;
+	bool gecc_enable;
 };
 
 struct dc_caps {

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c

@@ -945,6 +945,7 @@ void dcn32_init_hw(struct dc *dc)
 		dc_dmub_srv_query_caps_cmd(dc->ctx->dmub_srv);
 		dc->caps.dmub_caps.psr = dc->ctx->dmub_srv->dmub->feature_caps.psr;
 		dc->caps.dmub_caps.subvp_psr = dc->ctx->dmub_srv->dmub->feature_caps.subvp_psr_support;
+		dc->caps.dmub_caps.gecc_enable = dc->ctx->dmub_srv->dmub->feature_caps.gecc_enable;
 		dc->caps.dmub_caps.mclk_sw = dc->ctx->dmub_srv->dmub->feature_caps.fw_assisted_mclk_switch;
 	}
 }

drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

@@ -1141,7 +1141,7 @@ static void dcn32_full_validate_bw_helper(struct dc *dc,
 	 * 4. Display configuration passes validation
 	 * 5. (Config doesn't support MCLK in VACTIVE/VBLANK || dc->debug.force_subvp_mclk_switch)
 	 */
-	if (!dc->debug.force_disable_subvp && dcn32_all_pipes_have_stream_and_plane(dc, context) &&
+	if (!dc->debug.force_disable_subvp && !dc->caps.dmub_caps.gecc_enable && dcn32_all_pipes_have_stream_and_plane(dc, context) &&
 	    !dcn32_mpo_in_use(context) && !dcn32_any_surfaces_rotated(dc, context) &&
 		(*vlevel == context->bw_ctx.dml.soc.num_states ||
 	    vba->DRAMClockChangeSupport[*vlevel][vba->maxMpcComb] == dm_dram_clock_change_unsupported ||