drm/amd/display: add null checks and set update flags for DCN2

* add plane state null checks
* add and set update surface flags
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -1427,6 +1427,9 @@ static enum surface_update_type det_surface_update(const struct dc *dc,
 
 	update_flags->raw = 0; // Reset all flags
 
+	if (u->flip_addr)
+		update_flags->bits.addr_update = 1;
+
 	if (!is_surface_in_context(context, u->surface)) {
 		update_flags->bits.new_plane = 1;
 		return UPDATE_TYPE_FULL;

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

@@ -492,7 +492,7 @@ static void dcn20_plane_atomic_disable(struct dc *dc, struct pipe_ctx *pipe_ctx)
 }
 
 
-static void dcn20_disable_plane(struct dc *dc, struct pipe_ctx *pipe_ctx)
+void dcn20_disable_plane(struct dc *dc, struct pipe_ctx *pipe_ctx)
 {
 	DC_LOGGER_INIT(dc->ctx->logger);
 
@@ -501,8 +501,6 @@ static void dcn20_disable_plane(struct dc *dc, struct pipe_ctx *pipe_ctx)
 
 	dcn20_plane_atomic_disable(dc, pipe_ctx);
 
-	//apply_DEGVIDCN10_253_wa(dc);
-
 	DC_LOG_DC("Power down front end %d\n",
 					pipe_ctx->pipe_idx);
 }
@@ -1092,7 +1090,7 @@ static void dcn20_power_on_plane(
 	}
 }
 
-static void dcn20_enable_plane(
+void dcn20_enable_plane(
 	struct dc *dc,
 	struct pipe_ctx *pipe_ctx,
 	struct dc_state *context)
@@ -1167,7 +1165,7 @@ static void dcn20_enable_plane(
 }
 
 
-void dcn20_program_pipe(
+static void dcn20_program_pipe(
 		struct dc *dc,
 		struct pipe_ctx *pipe_ctx,
 		struct dc_state *context)

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.h

@@ -89,7 +89,15 @@ void dcn20_pipe_control_lock_global(
 		struct pipe_ctx *pipe,
 		bool lock);
 void dcn20_setup_gsl_group_as_lock(const struct dc *dc,
-				  struct pipe_ctx *pipe_ctx,
-				  bool enable);
-
+				struct pipe_ctx *pipe_ctx,
+				bool enable);
+void dcn20_pipe_control_lock(
+	struct dc *dc,
+	struct pipe_ctx *pipe,
+	bool lock);
+void dcn20_disable_plane(struct dc *dc, struct pipe_ctx *pipe_ctx);
+void dcn20_enable_plane(
+	struct dc *dc,
+	struct pipe_ctx *pipe_ctx,
+	struct dc_state *context);
 #endif /* __DC_HWSS_DCN20_H__ */

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -2340,7 +2340,6 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 		context->bw_ctx.dml.funcs.rq_dlg_get_rq_reg(&context->bw_ctx.dml,
 				&context->res_ctx.pipe_ctx[i].rq_regs,
 				pipes[pipe_idx].pipe);
-
 		pipe_idx++;
 	}