/* Copyright 2021 Advanced Micro Devices, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: AMD
*
*/
#include "link_enc_cfg.h"
#include "resource.h"
#include "link.h"
#define DC_LOGGER dc->ctx->logger
/* Check whether stream is supported by DIG link encoders. */
static bool is_dig_link_enc_stream(struct dc_stream_state *stream)
{
bool is_dig_stream = false;
struct link_encoder *link_enc = NULL;
int i;
/* Loop over created link encoder objects. */
if (stream) {
for (i = 0; i < stream->ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) {
link_enc = stream->ctx->dc->res_pool->link_encoders[i];
/* Need to check link signal type rather than stream signal type which may not
* yet match.
*/
if (link_enc && ((uint32_t)stream->link->connector_signal & link_enc->output_signals)) {
if (dc_is_dp_signal(stream->signal)) {
/* DIGs do not support DP2.0 streams with 128b/132b encoding. */
struct dc_link_settings link_settings = {0};
stream->ctx->dc->link_srv->dp_decide_link_settings(stream, &link_settings);
if ((link_settings.link_rate >= LINK_RATE_LOW) &&
link_settings.link_rate <= LINK_RATE_HIGH3) {
is_dig_stream = true;
break;
}
} else {
is_dig_stream = true;
break;
}
}
}
}
return is_dig_stream;
}
static struct link_enc_assignment get_assignment(struct dc *dc, int i)
{
struct link_enc_assignment assignment;
if (dc->current_state->res_ctx.link_enc_cfg_ctx.mode == LINK_ENC_CFG_TRANSIENT)
assignment = dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i];
else /* LINK_ENC_CFG_STEADY */
assignment = dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
return assignment;
}
/* Return stream using DIG link encoder resource. NULL if unused. */
static struct dc_stream_state *get_stream_using_link_enc(
struct dc_state *state,
enum engine_id eng_id)
{
struct dc_stream_state *stream = NULL;
int i;
for (i = 0; i < state->stream_count; i++) {
struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if ((assignment.valid == true) && (assignment.eng_id == eng_id)) {
stream = state->streams[i];
break;
}
}
return stream;
}
static void remove_link_enc_assignment(
struct dc_state *state,
struct dc_stream_state *stream,
enum engine_id eng_id)
{
int eng_idx;
int i;
if (eng_id != ENGINE_ID_UNKNOWN) {
eng_idx = eng_id - ENGINE_ID_DIGA;
/* stream ptr of stream in dc_state used to update correct entry in
* link_enc_assignments table.
*/
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.valid && assignment.stream == stream) {
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false;
/* Only add link encoder back to availability pool if not being
* used by any other stream (i.e. removing SST stream or last MST stream).
*/
if (get_stream_using_link_enc(state, eng_id) == NULL)
state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] = eng_id;
stream->link_enc = NULL;
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN;
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL;
dc_stream_release(stream);
break;
}
}
}
}
static void add_link_enc_assignment(
struct dc_state *state,
struct dc_stream_state *stream,
enum engine_id eng_id)
{
int eng_idx;
int i;
if (eng_id != ENGINE_ID_UNKNOWN) {
eng_idx = eng_id - ENGINE_ID_DIGA;
/* stream ptr of stream in dc_state used to update correct entry in
* link_enc_assignments table.
*/
for (i = 0; i < state->stream_count; i++) {
if (stream == state->streams[i]) {
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i] = (struct link_enc_assignment){
.valid = true,
.ep_id = (struct display_endpoint_id) {
.link_id = stream->link->link_id,
.ep_type = stream->link->ep_type},
.eng_id = eng_id,
.stream = stream};
dc_stream_retain(stream);
state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] = ENGINE_ID_UNKNOWN;
stream->link_enc = stream->ctx->dc->res_pool->link_encoders[eng_idx];
break;
}
}
/* Attempted to add an encoder assignment for a stream not in dc_state. */
ASSERT(i != state->stream_count);
}
}
/* Return first available DIG link encoder. */
static enum engine_id find_first_avail_link_enc(
const struct dc_context *ctx,
const struct dc_state *state,
enum engine_id eng_id_requested)
{
enum engine_id eng_id = ENGINE_ID_UNKNOWN;
int i;
if (eng_id_requested != ENGINE_ID_UNKNOWN) {
for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) {
eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i];
if (eng_id == eng_id_requested)
return eng_id;
}
}
eng_id = ENGINE_ID_UNKNOWN;
for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) {
eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i];
if (eng_id != ENGINE_ID_UNKNOWN)
break;
}
return eng_id;
}
/* Check for availability of link encoder eng_id. */
static bool is_avail_link_enc(struct dc_state *state, enum engine_id eng_id, struct dc_stream_state *stream)
{
bool is_avail = false;
int eng_idx = eng_id - ENGINE_ID_DIGA;
/* An encoder is available if it is still in the availability pool. */
if (eng_id != ENGINE_ID_UNKNOWN && state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] != ENGINE_ID_UNKNOWN) {
is_avail = true;
} else {
struct dc_stream_state *stream_assigned = NULL;
/* MST streams share the same link and should share the same encoder.
* If a stream that has already been assigned a link encoder uses as the
* same link as the stream checking for availability, it is an MST stream
* and should use the same link encoder.
*/
stream_assigned = get_stream_using_link_enc(state, eng_id);
if (stream_assigned && stream != stream_assigned && stream->link == stream_assigned->link)
is_avail = true;
}
return is_avail;
}
/* Test for display_endpoint_id equality. */
static bool are_ep_ids_equal(struct display_endpoint_id *lhs, struct display_endpoint_id *rhs)
{
bool are_equal = false;
if (lhs->link_id.id == rhs->link_id.id &&
lhs->link_id.enum_id == rhs->link_id.enum_id &&
lhs->link_id.type == rhs->link_id.type &&
lhs->ep_type == rhs->ep_type)
are_equal = true;
return are_equal;
}
static struct link_encoder *get_link_enc_used_by_link(
struct dc_state *state,
const struct dc_link *link)
{
struct link_encoder *link_enc = NULL;
struct display_endpoint_id ep_id;
int i;
ep_id = (struct display_endpoint_id) {
.link_id = link->link_id,
.ep_type = link->ep_type};
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.eng_id == ENGINE_ID_UNKNOWN)
continue;
if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id))
link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
}
return link_enc;
}
/* Clear all link encoder assignments. */
static void clear_enc_assignments(const struct dc *dc, struct dc_state *state)
{
int i;
for (i = 0; i < MAX_PIPES; i++) {
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false;
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN;
if (state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream != NULL) {
dc_stream_release(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream);
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL;
}
}
for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) {
if (dc->res_pool->link_encoders[i])
state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = (enum engine_id) i;
else
state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = ENGINE_ID_UNKNOWN;
}
}
void link_enc_cfg_init(
const struct dc *dc,
struct dc_state *state)
{
clear_enc_assignments(dc, state);
state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY;
}
void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx)
{
memcpy(&dst_ctx->res_ctx.link_enc_cfg_ctx,
&src_ctx->res_ctx.link_enc_cfg_ctx,
sizeof(dst_ctx->res_ctx.link_enc_cfg_ctx));
}
void link_enc_cfg_link_encs_assign(
struct dc *dc,
struct dc_state *state,
struct dc_stream_state *streams[],
uint8_t stream_count)
{
enum engine_id eng_id = ENGINE_ID_UNKNOWN, eng_id_req = ENGINE_ID_UNKNOWN;
int i;
int j;
ASSERT(state->stream_count == stream_count);
ASSERT(dc->current_state->res_ctx.link_enc_cfg_ctx.mode == LINK_ENC_CFG_STEADY);
/* Release DIG link encoder resources before running assignment algorithm. */
for (i = 0; i < dc->current_state->stream_count; i++)
dc->res_pool->funcs->link_enc_unassign(state, dc->current_state->streams[i]);
for (i = 0; i < MAX_PIPES; i++)
ASSERT(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid == false);
/* (a) Assign DIG link encoders to physical (unmappable) endpoints first. */
for (i = 0; i < stream_count; i++) {
struct dc_stream_state *stream = streams[i];
/* skip it if the link is mappable endpoint. */
if (stream->link->is_dig_mapping_flexible)
continue;
/* Skip stream if not supported by DIG link encoder. */
if (!is_dig_link_enc_stream(stream))
continue;
/* Physical endpoints have a fixed mapping to DIG link encoders. */
eng_id = stream->link->eng_id;
add_link_enc_assignment(state, stream, eng_id);
}
/* (b) Retain previous assignments for mappable endpoints if encoders still available. */
eng_id = ENGINE_ID_UNKNOWN;
if (state != dc->current_state) {
struct dc_state *prev_state = dc->current_state;
for (i = 0; i < stream_count; i++) {
struct dc_stream_state *stream = state->streams[i];
/* Skip it if the link is NOT mappable endpoint. */
if (!stream->link->is_dig_mapping_flexible)
continue;
/* Skip stream if not supported by DIG link encoder. */
if (!is_dig_link_enc_stream(stream))
continue;
for (j = 0; j < prev_state->stream_count; j++) {
struct dc_stream_state *prev_stream = prev_state->streams[j];
if (stream == prev_stream && stream->link == prev_stream->link &&
prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].valid) {
eng_id = prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].eng_id;
if (is_avail_link_enc(state, eng_id, stream))
add_link_enc_assignment(state, stream, eng_id);
}
}
}
}
/* (c) Then assign encoders to remaining mappable endpoints. */
eng_id = ENGINE_ID_UNKNOWN;
for (i = 0; i < stream_count; i++) {
struct dc_stream_state *stream = streams[i];
struct link_encoder *link_enc = NULL;
/* Skip it if the link is NOT mappable endpoint. */
if (!stream->link->is_dig_mapping_flexible)
continue;
/* Skip if encoder assignment retained in step (b) above. */
if (stream->link_enc)
continue;
/* Skip stream if not supported by DIG link encoder. */
if (!is_dig_link_enc_stream(stream)) {
ASSERT(stream->link->is_dig_mapping_flexible != true);
continue;
}
/* Mappable endpoints have a flexible mapping to DIG link encoders. */
/* For MST, multiple streams will share the same link / display
* endpoint. These streams should use the same link encoder
* assigned to that endpoint.
*/
link_enc = get_link_enc_used_by_link(state, stream->link);
if (link_enc == NULL) {
if (stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA &&
stream->link->dpia_preferred_eng_id != ENGINE_ID_UNKNOWN)
eng_id_req = stream->link->dpia_preferred_eng_id;
eng_id = find_first_avail_link_enc(stream->ctx, state, eng_id_req);
}
else
eng_id = link_enc->preferred_engine;
add_link_enc_assignment(state, stream, eng_id);
}
link_enc_cfg_validate(dc, state);
/* Update transient assignments. */
for (i = 0; i < MAX_PIPES; i++) {
dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i] =
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
}
/* Log encoder assignments. */
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment =
dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.valid)
DC_LOG_DEBUG("%s: CUR %s(%d) - enc_id(%d)\n",
__func__,
assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA",
assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ?
assignment.ep_id.link_id.enum_id :
assignment.ep_id.link_id.enum_id - 1,
assignment.eng_id);
}
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment =
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.valid)
DC_LOG_DEBUG("%s: NEW %s(%d) - enc_id(%d)\n",
__func__,
assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA",
assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ?
assignment.ep_id.link_id.enum_id :
assignment.ep_id.link_id.enum_id - 1,
assignment.eng_id);
}
/* Current state mode will be set to steady once this state committed. */
state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY;
}
void link_enc_cfg_link_enc_unassign(
struct dc_state *state,
struct dc_stream_state *stream)
{
enum engine_id eng_id = ENGINE_ID_UNKNOWN;
if (stream->link_enc)
eng_id = stream->link_enc->preferred_engine;
remove_link_enc_assignment(state, stream, eng_id);
}
bool link_enc_cfg_is_transmitter_mappable(
struct dc *dc,
struct link_encoder *link_enc)
{
bool is_mappable = false;
enum engine_id eng_id = link_enc->preferred_engine;
struct dc_stream_state *stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id);
if (stream)
is_mappable = stream->link->is_dig_mapping_flexible;
return is_mappable;
}
struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc(
struct dc *dc,
enum engine_id eng_id)
{
struct dc_stream_state *stream = NULL;
int i;
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = get_assignment(dc, i);
if ((assignment.valid == true) && (assignment.eng_id == eng_id)) {
stream = assignment.stream;
break;
}
}
return stream;
}
struct dc_link *link_enc_cfg_get_link_using_link_enc(
struct dc *dc,
enum engine_id eng_id)
{
struct dc_link *link = NULL;
struct dc_stream_state *stream = NULL;
stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id);
if (stream)
link = stream->link;
return link;
}
struct link_encoder *link_enc_cfg_get_link_enc_used_by_link(
struct dc *dc,
const struct dc_link *link)
{
struct link_encoder *link_enc = NULL;
struct display_endpoint_id ep_id;
int i;
ep_id = (struct display_endpoint_id) {
.link_id = link->link_id,
.ep_type = link->ep_type};
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = get_assignment(dc, i);
if (assignment.eng_id == ENGINE_ID_UNKNOWN)
continue;
if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) {
link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
break;
}
}
return link_enc;
}
struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc)
{
struct link_encoder *link_enc = NULL;
enum engine_id encs_assigned[MAX_DIG_LINK_ENCODERS];
int i;
for (i = 0; i < MAX_DIG_LINK_ENCODERS; i++)
encs_assigned[i] = ENGINE_ID_UNKNOWN;
/* Add assigned encoders to list. */
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = get_assignment(dc, i);
if (assignment.valid && assignment.eng_id != ENGINE_ID_UNKNOWN)
encs_assigned[assignment.eng_id - ENGINE_ID_DIGA] = assignment.eng_id;
}
for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) {
if (encs_assigned[i] == ENGINE_ID_UNKNOWN &&
dc->res_pool->link_encoders[i] != NULL) {
link_enc = dc->res_pool->link_encoders[i];
break;
}
}
return link_enc;
}
struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream(
struct dc *dc,
const struct dc_stream_state *stream)
{
struct link_encoder *link_enc;
link_enc = link_enc_cfg_get_link_enc_used_by_link(dc, stream->link);
return link_enc;
}
struct link_encoder *link_enc_cfg_get_link_enc(
const struct dc_link *link)
{
struct link_encoder *link_enc = NULL;
/* Links supporting dynamically assigned link encoder will be assigned next
* available encoder if one not already assigned.
*/
if (link->is_dig_mapping_flexible &&
link->dc->res_pool->funcs->link_encs_assign) {
link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link);
if (link_enc == NULL)
link_enc = link_enc_cfg_get_next_avail_link_enc(
link->ctx->dc);
} else
link_enc = link->link_enc;
return link_enc;
}
struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current(
struct dc *dc,
const struct dc_stream_state *stream)
{
struct link_encoder *link_enc = NULL;
struct display_endpoint_id ep_id;
int i;
ep_id = (struct display_endpoint_id) {
.link_id = stream->link->link_id,
.ep_type = stream->link->ep_type};
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment =
dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.eng_id == ENGINE_ID_UNKNOWN)
continue;
if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) {
link_enc = stream->link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
break;
}
}
return link_enc;
}
bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link)
{
bool is_avail = true;
int i;
/* An encoder is not available if it has already been assigned to a different endpoint. */
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = get_assignment(dc, i);
struct display_endpoint_id ep_id = (struct display_endpoint_id) {
.link_id = link->link_id,
.ep_type = link->ep_type};
if (assignment.valid && assignment.eng_id == eng_id && !are_ep_ids_equal(&ep_id, &assignment.ep_id)) {
is_avail = false;
break;
}
}
return is_avail;
}
bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state)
{
bool is_valid = false;
bool valid_entries = true;
bool valid_stream_ptrs = true;
bool valid_uniqueness = true;
bool valid_avail = true;
bool valid_streams = true;
int i, j;
uint8_t valid_count = 0;
uint8_t dig_stream_count = 0;
int eng_ids_per_ep_id[MAX_PIPES] = {0};
int ep_ids_per_eng_id[MAX_PIPES] = {0};
int valid_bitmap = 0;
/* (1) No. valid entries same as stream count. */
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.valid)
valid_count++;
if (is_dig_link_enc_stream(state->streams[i]))
dig_stream_count++;
}
if (valid_count != dig_stream_count)
valid_entries = false;
/* (2) Matching stream ptrs. */
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.valid) {
if (assignment.stream != state->streams[i])
valid_stream_ptrs = false;
}
}
/* (3) Each endpoint assigned unique encoder. */
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment_i = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment_i.valid) {
struct display_endpoint_id ep_id_i = assignment_i.ep_id;
eng_ids_per_ep_id[i]++;
ep_ids_per_eng_id[i]++;
for (j = 0; j < MAX_PIPES; j++) {
struct link_enc_assignment assignment_j =
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j];
if (j == i)
continue;
if (assignment_j.valid) {
struct display_endpoint_id ep_id_j = assignment_j.ep_id;
if (are_ep_ids_equal(&ep_id_i, &ep_id_j) &&
assignment_i.eng_id != assignment_j.eng_id) {
valid_uniqueness = false;
eng_ids_per_ep_id[i]++;
} else if (!are_ep_ids_equal(&ep_id_i, &ep_id_j) &&
assignment_i.eng_id == assignment_j.eng_id) {
valid_uniqueness = false;
ep_ids_per_eng_id[i]++;
}
}
}
}
}
/* (4) Assigned encoders not in available pool. */
for (i = 0; i < MAX_PIPES; i++) {
struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
if (assignment.valid) {
for (j = 0; j < dc->res_pool->res_cap->num_dig_link_enc; j++) {
if (state->res_ctx.link_enc_cfg_ctx.link_enc_avail[j] == assignment.eng_id) {
valid_avail = false;
break;
}
}
}
}
/* (5) All streams have valid link encoders. */
for (i = 0; i < state->stream_count; i++) {
struct dc_stream_state *stream = state->streams[i];
if (is_dig_link_enc_stream(stream) && stream->link_enc == NULL) {
valid_streams = false;
break;
}
}
is_valid = valid_entries && valid_stream_ptrs && valid_uniqueness && valid_avail && valid_streams;
ASSERT(is_valid);
if (is_valid == false) {
valid_bitmap =
(valid_entries & 0x1) |
((valid_stream_ptrs & 0x1) << 1) |
((valid_uniqueness & 0x1) << 2) |
((valid_avail & 0x1) << 3) |
((valid_streams & 0x1) << 4);
DC_LOG_ERROR("%s: Invalid link encoder assignments - 0x%x\n", __func__, valid_bitmap);
}
return is_valid;
}
void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state)
{
int i = 0;
int num_transient_assignments = 0;
for (i = 0; i < MAX_PIPES; i++) {
if (current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i].valid)
num_transient_assignments++;
}
/* Only enter transient mode if the new encoder assignments are valid. */
if (new_state->stream_count == num_transient_assignments) {
current_state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_TRANSIENT;
DC_LOG_DEBUG("%s: current_state(%p) mode(%d)\n", __func__, current_state, LINK_ENC_CFG_TRANSIENT);
}
}
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