[PATCH 04/19] drm/amd/display: Add logging resource checks

[Alex Hung]

From: Charlene Liu <charlene....@amd.com>

[Why]
When mapping resources, resources could be unavailable.
Cc: Mario Limonciello <mario.limoncie...@amd.com>
Cc: Alex Deucher <alexander.deuc...@amd.com>
Cc: sta...@vger.kernel.org
Reviewed-by: Sung joon Kim <sungjoon....@amd.com>
Acked-by: Alex Hung <alex.h...@amd.com>
Signed-off-by: Charlene Liu <charlene....@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c          | 4 +++-
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 4 ++++
 drivers/gpu/drm/amd/display/dc/core/dc_state.c    | 5 +++--
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c 
b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 69e726630241..aa7c02ba948e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -3522,7 +3522,7 @@ static void commit_planes_for_stream(struct dc *dc,
        top_pipe_to_program = resource_get_otg_master_for_stream(
                                &context->res_ctx,
                                stream);
-
+       ASSERT(top_pipe_to_program != NULL);
        for (i = 0; i < dc->res_pool->pipe_count; i++) {
                struct pipe_ctx *old_pipe = 
&dc->current_state->res_ctx.pipe_ctx[i];
 
@@ -4345,6 +4345,8 @@ static bool 
should_commit_minimal_transition_for_windowed_mpo_odm(struct dc *dc,
 
        cur_pipe = 
resource_get_otg_master_for_stream(&dc->current_state->res_ctx, stream);
        new_pipe = resource_get_otg_master_for_stream(&context->res_ctx, 
stream);
+       if (!cur_pipe || !new_pipe)
+               return false;
        cur_is_odm_in_use = resource_get_odm_slice_count(cur_pipe) > 1;
        new_is_odm_in_use = resource_get_odm_slice_count(new_pipe) > 1;
        if (cur_is_odm_in_use == new_is_odm_in_use)
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 f2abc1096ffb..9fbdb09697fd 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -2194,6 +2194,10 @@ void resource_log_pipe_topology_update(struct dc *dc, 
struct dc_state *state)
        for (stream_idx = 0; stream_idx < state->stream_count; stream_idx++) {
                otg_master = resource_get_otg_master_for_stream(
                                &state->res_ctx, state->streams[stream_idx]);
+               if (!otg_master || otg_master->stream_res.tg == NULL) {
+                       DC_LOG_DC("topology update: otg_master NULL stream_idx 
%d!\n", stream_idx);
+                       return;
+               }
                slice_count = resource_get_opp_heads_for_otg_master(otg_master,
                                &state->res_ctx, opp_heads);
                for (slice_idx = 0; slice_idx < slice_count; slice_idx++) {
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_state.c 
b/drivers/gpu/drm/amd/display/dc/core/dc_state.c
index 56feee0ff01b..88c6436b28b6 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_state.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_state.c
@@ -434,8 +434,9 @@ bool dc_state_add_plane(
 
        otg_master_pipe = resource_get_otg_master_for_stream(
                        &state->res_ctx, stream);
-       added = resource_append_dpp_pipes_for_plane_composition(state,
-                       dc->current_state, pool, otg_master_pipe, plane_state);
+       if (otg_master_pipe)
+               added = resource_append_dpp_pipes_for_plane_composition(state,
+                               dc->current_state, pool, otg_master_pipe, 
plane_state);
 
        if (added) {
                stream_status->plane_states[stream_status->plane_count] =
-- 
2.34.1