drm/amd/display: Check if hubp function hooks exist before calling them

Signed-off-by: NCharlene Liu <charlene.liu@amd.com>
Reviewed-by: NDmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: NBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -787,7 +787,7 @@ static bool dcn10_hw_wa_force_recovery(struct dc *dc)
 			&dc->current_state->res_ctx.pipe_ctx[i];
 		if (pipe_ctx != NULL) {
 			hubp = pipe_ctx->plane_res.hubp;
-			if (hubp != NULL) {
+			if (hubp != NULL && hubp->funcs->hubp_get_underflow_status) {
 				if (hubp->funcs->hubp_get_underflow_status(hubp) != 0) {
 					/* one pipe underflow, we will reset all the pipes*/
 					need_recover = true;
@@ -813,7 +813,7 @@ static bool dcn10_hw_wa_force_recovery(struct dc *dc)
 		if (pipe_ctx != NULL) {
 			hubp = pipe_ctx->plane_res.hubp;
 			/*DCHUBP_CNTL:HUBP_BLANK_EN=1*/
-			if (hubp != NULL)
+			if (hubp != NULL && hubp->funcs->set_hubp_blank_en)
 				hubp->funcs->set_hubp_blank_en(hubp, true);
 		}
 	}
@@ -826,7 +826,7 @@ static bool dcn10_hw_wa_force_recovery(struct dc *dc)
 		if (pipe_ctx != NULL) {
 			hubp = pipe_ctx->plane_res.hubp;
 			/*DCHUBP_CNTL:HUBP_DISABLE=1*/
-			if (hubp != NULL)
+			if (hubp != NULL && hubp->funcs->hubp_disable_control)
 				hubp->funcs->hubp_disable_control(hubp, true);
 		}
 	}
@@ -836,7 +836,7 @@ static bool dcn10_hw_wa_force_recovery(struct dc *dc)
 		if (pipe_ctx != NULL) {
 			hubp = pipe_ctx->plane_res.hubp;
 			/*DCHUBP_CNTL:HUBP_DISABLE=0*/
-			if (hubp != NULL)
+			if (hubp != NULL && hubp->funcs->hubp_disable_control)
 				hubp->funcs->hubp_disable_control(hubp, true);
 		}
 	}
@@ -848,7 +848,7 @@ static bool dcn10_hw_wa_force_recovery(struct dc *dc)
 		if (pipe_ctx != NULL) {
 			hubp = pipe_ctx->plane_res.hubp;
 			/*DCHUBP_CNTL:HUBP_BLANK_EN=0*/
-			if (hubp != NULL)
+			if (hubp != NULL && hubp->funcs->set_hubp_blank_en)
 				hubp->funcs->set_hubp_blank_en(hubp, true);
 		}
 	}