drm/amd/display: Added disconnect dchub.

Add disable ttu interface to dcn10, when remove
mpc, disable ttu as well.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c

@@ -56,6 +56,14 @@ void hubp1_set_blank(struct hubp *hubp, bool blank)
 	}
 }
 
+static void hubp1_disconnect(struct hubp *hubp)
+{
+	struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
+
+	REG_UPDATE(DCHUBP_CNTL,
+			HUBP_TTU_DISABLE, 1);
+}
+
 static void hubp1_set_hubp_blank_en(struct hubp *hubp, bool blank)
 {
 	struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
@@ -933,6 +941,7 @@ static struct hubp_funcs dcn10_hubp_funcs = {
 	.set_hubp_blank_en = hubp1_set_hubp_blank_en,
 	.set_cursor_attributes	= hubp1_cursor_set_attributes,
 	.set_cursor_position	= hubp1_cursor_set_position,
+	.hubp_disconnect = hubp1_disconnect,
 };
 
 /*****************************************/

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

@@ -2019,6 +2019,7 @@ static void dcn10_apply_ctx_for_surface(
 		struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
 		struct pipe_ctx *old_pipe_ctx =
 				&dc->current_state->res_ctx.pipe_ctx[i];
+		struct hubp *hubp = dc->res_pool->hubps[i];
 
 		if (!pipe_ctx->plane_state && !old_pipe_ctx->plane_state)
 			continue;
@@ -2067,6 +2068,9 @@ static void dcn10_apply_ctx_for_surface(
 					"[debug_mpo: apply_ctx disconnect pending on mpcc %d]\n",
 					old_pipe_ctx->mpcc->inst);*/
 
+			if (hubp->funcs->hubp_disconnect)
+				hubp->funcs->hubp_disconnect(hubp);
+
 			if (dc->debug.sanity_checks)
 				verify_allow_pstate_change_high(dc->hwseq);
 

drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h

@@ -100,6 +100,8 @@ struct hubp_funcs {
 			const struct dc_cursor_position *pos,
 			const struct dc_cursor_mi_param *param);
 
+	void (*hubp_disconnect)(struct hubp *hubp);
+
 };
 
 #endif