drm/amd/display: Refactor dc_validation_set array into single root struct

[Why]
dc_validate_with_context() took a C array of per-stream elements plus a
separate count. This flat array cannot be extended to carry global objects
without widening the signature further.

[How]
Rename the per-stream element to dc_validation_stream, and make
dc_validation_set a root struct holding streams[MAX_STREAMS] and
stream_count. Update dc_validate_with_context() to take a single
const dc_validation_set * and propagate the new shape through all DC-layer
callers and helpers. Remove the never-implemented
dce112_validate_with_context declaration and the orphaned dce100
forward-declare.

No behavior change.

Reviewed-by: Dominik Kaszewski <dominik.kaszewski@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2479,7 +2479,7 @@ enum dc_status dc_commit_streams(struct dc *dc, struct dc_commit_streams_params
 	unsigned int i, j;
 	struct dc_state *context;
 	enum dc_status res = DC_OK;
-	struct dc_validation_set set[MAX_STREAMS] = {0};
+	struct dc_validation_set set = {0};
 	struct pipe_ctx *pipe;
 	bool handle_exit_odm2to1 = false;
 
@@ -2512,14 +2512,15 @@ enum dc_status dc_commit_streams(struct dc *dc, struct dc_commit_streams_params
 
 		dc_stream_log(dc, stream);
 
-		set[i].stream = stream;
+		set.streams[i].stream = stream;
 
 		if (status) {
-			set[i].plane_count = (uint8_t)status->plane_count;
+			set.streams[i].plane_count = (uint8_t)status->plane_count;
 			for (j = 0; j < (unsigned int)status->plane_count; j++)
-				set[i].plane_states[j] = status->plane_states[j];
+				set.streams[i].plane_states[j] = status->plane_states[j];
 		}
 	}
+	set.stream_count = (uint8_t)params->stream_count;
 
 	/* ODM Combine 2:1 power optimization is only applied for single stream
 	 * scenario, it uses extra pipes than needed to reduce power consumption
@@ -2543,7 +2544,7 @@ enum dc_status dc_commit_streams(struct dc *dc, struct dc_commit_streams_params
 
 	context->power_source = params->power_source;
 
-	res = dc_validate_with_context(dc, set, params->stream_count, context, DC_VALIDATE_MODE_AND_PROGRAMMING);
+	res = dc_validate_with_context(dc, &set, context, DC_VALIDATE_MODE_AND_PROGRAMMING);
 
 	/*
 	 * Only update link encoder to stream assignment after bandwidth validation passed.

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

@@ -4325,8 +4325,7 @@ bool dc_resource_is_dsc_encoding_supported(const struct dc *dc)
 
 static bool planes_changed_for_existing_stream(struct dc_state *context,
 					       struct dc_stream_state *stream,
-					       const struct dc_validation_set set[],
-					       unsigned int set_count)
+					       const struct dc_validation_set *set)
 {
 	unsigned int i, j;
 	struct dc_stream_status *stream_status = NULL;
@@ -4343,18 +4342,18 @@ static bool planes_changed_for_existing_stream(struct dc_state *context,
 		return false;
 	}
 
-	for (i = 0; i < set_count; i++)
-		if (set[i].stream == stream)
+	for (i = 0; i < set->stream_count; i++)
+		if (set->streams[i].stream == stream)
 			break;
 
-	if (i == set_count)
+	if (i == set->stream_count)
 		ASSERT(0);
 
-	if (set[i].plane_count != stream_status->plane_count)
+	if (set->streams[i].plane_count != stream_status->plane_count)
 		return true;
 
-	for (j = 0; j < set[i].plane_count; j++)
-		if (set[i].plane_states[j] != stream_status->plane_states[j])
+	for (j = 0; j < set->streams[i].plane_count; j++)
+		if (set->streams[i].plane_states[j] != stream_status->plane_states[j])
 			return true;
 
 	return false;
@@ -4363,23 +4362,22 @@ static bool planes_changed_for_existing_stream(struct dc_state *context,
 static bool add_all_planes_for_stream(
 		const struct dc *dc,
 		struct dc_stream_state *stream,
-		const struct dc_validation_set set[],
-		unsigned int set_count,
+		const struct dc_validation_set *set,
 		struct dc_state *state)
 {
 	unsigned int i, j;
 
-	for (i = 0; i < set_count; i++)
-		if (set[i].stream == stream)
+	for (i = 0; i < set->stream_count; i++)
+		if (set->streams[i].stream == stream)
 			break;
 
-	if (i == set_count) {
+	if (i == set->stream_count) {
 		dm_error("Stream %p not found in set!\n", stream);
 		return false;
 	}
 
-	for (j = 0; j < set[i].plane_count; j++)
-		if (!dc_state_add_plane(dc, stream, set[i].plane_states[j], state))
+	for (j = 0; j < set->streams[i].plane_count; j++)
+		if (!dc_state_add_plane(dc, stream, set->streams[i].plane_states[j], state))
 			return false;
 
 	return true;
@@ -4389,8 +4387,7 @@ static bool add_all_planes_for_stream(
  * dc_validate_with_context - Validate and update the potential new stream in the context object
  *
  * @dc: Used to get the current state status
- * @set: An array of dc_validation_set with all the current streams reference
- * @set_count: Total of streams
+ * @set: Root validation object holding all streams and their planes
  * @context: New context
  * @validate_mode: identify the validation mode
  *
@@ -4404,8 +4401,7 @@ static bool add_all_planes_for_stream(
  * In case of success, return DC_OK (1), otherwise, return a DC error.
  */
 enum dc_status dc_validate_with_context(struct dc *dc,
-					const struct dc_validation_set set[],
-					unsigned int set_count,
+					const struct dc_validation_set *set,
 					struct dc_state *context,
 					enum dc_validate_mode validate_mode)
 {
@@ -4426,8 +4422,8 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 	for (i = 0; i < old_stream_count; i++) {
 		struct dc_stream_state *stream = context->streams[i];
 
-		for (j = 0; j < set_count; j++) {
-			if (stream == set[j].stream) {
+		for (j = 0; j < set->stream_count; j++) {
+			if (stream == set->streams[j].stream) {
 				found = true;
 				break;
 			}
@@ -4440,8 +4436,8 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 	}
 
 	/* Second, build a list of new streams */
-	for (i = 0; i < set_count; i++) {
-		struct dc_stream_state *stream = set[i].stream;
+	for (i = 0; i < set->stream_count; i++) {
+		struct dc_stream_state *stream = set->streams[i].stream;
 
 		for (j = 0; j < old_stream_count; j++) {
 			if (stream == context->streams[j]) {
@@ -4459,10 +4455,10 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 	/* Build a list of unchanged streams which is necessary for handling
 	 * planes change such as added, removed, and updated.
 	 */
-	for (i = 0; i < set_count; i++) {
+	for (i = 0; i < set->stream_count; i++) {
 		/* Check if stream is part of the delete list */
 		for (j = 0; j < del_streams_count; j++) {
-			if (set[i].stream == del_streams[j]) {
+			if (set->streams[i].stream == del_streams[j]) {
 				found = true;
 				break;
 			}
@@ -4471,7 +4467,7 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 		if (!found) {
 			/* Check if stream is part of the add list */
 			for (j = 0; j < add_streams_count; j++) {
-				if (set[i].stream == add_streams[j]) {
+				if (set->streams[i].stream == add_streams[j]) {
 					found = true;
 					break;
 				}
@@ -4479,7 +4475,7 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 		}
 
 		if (!found)
-			unchanged_streams[unchanged_streams_count++] = set[i].stream;
+			unchanged_streams[unchanged_streams_count++] = set->streams[i].stream;
 
 		found = false;
 	}
@@ -4488,8 +4484,7 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 	for (i = 0; i < unchanged_streams_count; i++) {
 		if (planes_changed_for_existing_stream(context,
 						       unchanged_streams[i],
-						       set,
-						       set_count)) {
+						       set)) {
 
 			if (!dc_state_rem_all_planes_for_stream(dc,
 							  unchanged_streams[i],
@@ -4557,7 +4552,7 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 		if (res != DC_OK)
 			goto fail;
 
-		if (!add_all_planes_for_stream(dc, add_streams[i], set, set_count, context)) {
+		if (!add_all_planes_for_stream(dc, add_streams[i], set, context)) {
 			res = DC_FAIL_ATTACH_SURFACES;
 			goto fail;
 		}
@@ -4567,9 +4562,8 @@ enum dc_status dc_validate_with_context(struct dc *dc,
 	for (i = 0; i < unchanged_streams_count; i++) {
 		if (planes_changed_for_existing_stream(context,
 						       unchanged_streams[i],
-						       set,
-						       set_count)) {
-			if (!add_all_planes_for_stream(dc, unchanged_streams[i], set, set_count, context)) {
+						       set)) {
+			if (!add_all_planes_for_stream(dc, unchanged_streams[i], set, context)) {
 				res = DC_FAIL_ATTACH_SURFACES;
 				goto fail;
 			}

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

@@ -2182,9 +2182,9 @@ void dc_post_update_surfaces_to_stream(
 void dc_get_default_tiling_info(const struct dc *dc, struct dc_tiling_info *tiling_info);
 
 /**
- * struct dc_validation_set - Struct to store surface/stream associations for validation
+ * struct dc_validation_stream - Per-stream surface/stream association for validation
  */
-struct dc_validation_set {
+struct dc_validation_stream {
 	/**
 	 * @stream: Stream state properties
 	 */
@@ -2201,6 +2201,21 @@ struct dc_validation_set {
 	uint8_t plane_count;
 };
 
+/**
+ * struct dc_validation_set - Root validation input grouping all streams for a commit
+ */
+struct dc_validation_set {
+	/**
+	 * @streams: Per-stream entries (stream + its planes)
+	 */
+	struct dc_validation_stream streams[MAX_STREAMS];
+
+	/**
+	 * @stream_count: Number of active entries in @streams
+	 */
+	uint8_t stream_count;
+};
+
 bool dc_validate_boot_timing(const struct dc *dc,
 				const struct dc_sink *sink,
 				struct dc_crtc_timing *crtc_timing);
@@ -2208,8 +2223,7 @@ bool dc_validate_boot_timing(const struct dc *dc,
 enum dc_status dc_validate_plane(struct dc *dc, const struct dc_plane_state *plane_state);
 
 enum dc_status dc_validate_with_context(struct dc *dc,
-					const struct dc_validation_set set[],
-					unsigned int set_count,
+					const struct dc_validation_set *set,
 					struct dc_state *context,
 					enum dc_validate_mode validate_mode);
 

drivers/gpu/drm/amd/display/dc/inc/resource.h

@@ -577,8 +577,7 @@ struct pipe_ctx *resource_find_free_secondary_pipe_legacy(
 		const struct pipe_ctx *primary_pipe);
 
 bool resource_validate_attach_surfaces(
-		const struct dc_validation_set set[],
-		int set_count,
+		const struct dc_validation_set *set,
 		const struct dc_state *old_context,
 		struct dc_state *context,
 		const struct resource_pool *pool);

drivers/gpu/drm/amd/display/dc/resource/dce100/dce100_resource.h

@@ -33,7 +33,6 @@
 
 struct dc;
 struct resource_pool;
-struct dc_validation_set;
 
 struct resource_pool *dce100_create_resource_pool(
 	uint8_t num_virtual_links,

drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.h

@@ -35,13 +35,6 @@ struct resource_pool *dce112_create_resource_pool(
 	uint8_t num_virtual_links,
 	struct dc *dc);
 
-enum dc_status dce112_validate_with_context(
-		struct dc *dc,
-		const struct dc_validation_set set[],
-		int set_count,
-		struct dc_state *context,
-		struct dc_state *old_context);
-
 enum dc_status dce112_validate_bandwidth(
 	struct dc *dc,
 	struct dc_state *context,