drm/amd/display: add ODM case when looking for first split pipe

commit 59de751e3845d699e02dc4da47322b92d83a41e2 upstream.

[Why]
When going from ODM 2:1 single display case to max displays, second
odm pipe needs to be repurposed for one of the new single displays.
However, acquire_first_split_pipe() only handles MPC case and not
ODM case

[How]
Add ODM conditions in acquire_first_split_pipe()
Add commit_minimal_transition_state() in commit_streams() to handle
odm 2:1 exit first, and then process new streams
Handle ODM condition in commit_minimal_transition_state()

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Samson Tam <samson.tam@amd.com>
Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index f07cba121d010ede23366360f35ffe22425e2822..eab53d6317c9fb18892e997f5a144e964165c7e2 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1962,6 +1962,9 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
        return result;
 }
 
+static bool commit_minimal_transition_state(struct dc *dc,
+               struct dc_state *transition_base_context);
+
 /**
  * dc_commit_streams - Commit current stream state
  *
@@ -1983,6 +1986,8 @@ enum dc_status dc_commit_streams(struct dc *dc,
        struct dc_state *context;
        enum dc_status res = DC_OK;
        struct dc_validation_set set[MAX_STREAMS] = {0};
+       struct pipe_ctx *pipe;
+       bool handle_exit_odm2to1 = false;
 
        if (dc->ctx->dce_environment == DCE_ENV_VIRTUAL_HW)
                return res;
@@ -2007,6 +2012,22 @@ enum dc_status dc_commit_streams(struct dc *dc,
                }
        }
 
+       /* Check for case where we are going from odm 2:1 to max
+        *  pipe scenario.  For these cases, we will call
+        *  commit_minimal_transition_state() to exit out of odm 2:1
+        *  first before processing new streams
+        */
+       if (stream_count == dc->res_pool->pipe_count) {
+               for (i = 0; i < dc->res_pool->pipe_count; i++) {
+                       pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+                       if (pipe->next_odm_pipe)
+                               handle_exit_odm2to1 = true;
+               }
+       }
+
+       if (handle_exit_odm2to1)
+               res = commit_minimal_transition_state(dc, dc->current_state);
+
        context = dc_create_state(dc);
        if (!context)
                goto context_alloc_fail;
@@ -3915,6 +3936,7 @@ static bool commit_minimal_transition_state(struct dc *dc,
        unsigned int i, j;
        unsigned int pipe_in_use = 0;
        bool subvp_in_use = false;
+       bool odm_in_use = false;
 
        if (!transition_context)
                return false;
@@ -3943,6 +3965,18 @@ static bool commit_minimal_transition_state(struct dc *dc,
                }
        }
 
+       /* If ODM is enabled and we are adding or removing planes from any ODM
+        * pipe, we must use the minimal transition.
+        */
+       for (i = 0; i < dc->res_pool->pipe_count; i++) {
+               struct pipe_ctx *pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+
+               if (pipe->stream && pipe->next_odm_pipe) {
+                       odm_in_use = true;
+                       break;
+               }
+       }
+
        /* When the OS add a new surface if we have been used all of pipes with odm combine
         * and mpc split feature, it need use commit_minimal_transition_state to transition safely.
         * After OS exit MPO, it will back to use odm and mpc split with all of pipes, we need
@@ -3951,7 +3985,7 @@ static bool commit_minimal_transition_state(struct dc *dc,
         * Reduce the scenarios to use dc_commit_state_no_check in the stage of flip. Especially
         * enter/exit MPO when DCN still have enough resources.
         */
-       if (pipe_in_use != dc->res_pool->pipe_count && !subvp_in_use) {
+       if (pipe_in_use != dc->res_pool->pipe_count && !subvp_in_use && !odm_in_use) {
                dc_release_state(transition_context);
                return true;
        }

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 0ae6dcc403a4b3da3449e0f0df9a5b31827c67f8..986de684b078e07cc16d151f40e27e4d406f2a72 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1444,6 +1444,26 @@ static int acquire_first_split_pipe(
                        split_pipe->plane_res.mpcc_inst = pool->dpps[i]->inst;
                        split_pipe->pipe_idx = i;
 
+                       split_pipe->stream = stream;
+                       return i;
+               } else if (split_pipe->prev_odm_pipe &&
+                               split_pipe->prev_odm_pipe->plane_state == split_pipe->plane_state) {
+                       split_pipe->prev_odm_pipe->next_odm_pipe = split_pipe->next_odm_pipe;
+                       if (split_pipe->next_odm_pipe)
+                               split_pipe->next_odm_pipe->prev_odm_pipe = split_pipe->prev_odm_pipe;
+
+                       if (split_pipe->prev_odm_pipe->plane_state)
+                               resource_build_scaling_params(split_pipe->prev_odm_pipe);
+
+                       memset(split_pipe, 0, sizeof(*split_pipe));
+                       split_pipe->stream_res.tg = pool->timing_generators[i];
+                       split_pipe->plane_res.hubp = pool->hubps[i];
+                       split_pipe->plane_res.ipp = pool->ipps[i];
+                       split_pipe->plane_res.dpp = pool->dpps[i];
+                       split_pipe->stream_res.opp = pool->opps[i];
+                       split_pipe->plane_res.mpcc_inst = pool->dpps[i]->inst;
+                       split_pipe->pipe_idx = i;
+
                        split_pipe->stream = stream;
                        return i;
                }