drm/amd/display: fix mpo exit hang

Signed-off-by: Eric Yang <Eric.Yang2@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>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 82a96de..dbf9cea 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -500,8 +500,10 @@ static void reset_front_end(
                        HUBP_CLOCK_ENABLE, 0);
        REG_UPDATE(DPP_CONTROL[fe_idx],
                        DPP_CLOCK_ENABLE, 0);
-       REG_UPDATE(OPP_PIPE_CONTROL[opp_id],
-                       OPP_PIPE_CLOCK_EN, 0);
+
+       if (mpcc_cfg.top_of_tree)
+               REG_UPDATE(OPP_PIPE_CONTROL[opp_id],
+                               OPP_PIPE_CLOCK_EN, 0);
 
        xfm->funcs->transform_reset(xfm);
 
@@ -1584,7 +1586,7 @@ static void dcn10_apply_ctx_for_surface(
        int i;
 
        /* reset unused mpcc */
-       /*for (i = 0; i < dc->res_pool->pipe_count; i++) {
+       for (i = 0; i < dc->res_pool->pipe_count; i++) {
                struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
                struct pipe_ctx *old_pipe_ctx =
                                &dc->current_context->res_ctx.pipe_ctx[i];
@@ -1593,7 +1595,12 @@ static void dcn10_apply_ctx_for_surface(
                                || (!pipe_ctx->stream && old_pipe_ctx->stream)) {
                        struct mpcc_cfg mpcc_cfg;
 
-                       mpcc_cfg.opp_id = 0xf;
+                       if (!old_pipe_ctx->top_pipe) {
+                               ASSERT(0);
+                               continue;
+                       }
+
+                       mpcc_cfg.opp_id = old_pipe_ctx->mpcc->opp_id;
                        mpcc_cfg.top_dpp_id = 0xf;
                        mpcc_cfg.bot_mpcc_id = 0xf;
                        mpcc_cfg.top_of_tree = !old_pipe_ctx->top_pipe;
@@ -1607,7 +1614,7 @@ static void dcn10_apply_ctx_for_surface(
                                        "Reset mpcc for pipe %d\n",
                                        old_pipe_ctx->pipe_idx);
                }
-       }*/
+       }
 
        if (!surface)
                return;