* [PATCH v5 3/4] drm/amd/display: Add DP 2.0 MST DC Support
[not found] <20211025223029.300891-1-lyude@redhat.com>
2021-10-25 22:30 ` [PATCH v5 1/4] drm: Remove slot checks in dp mst topology during commit Lyude Paul
@ 2021-10-25 22:30 ` Lyude Paul
2021-10-25 22:30 ` [PATCH v5 4/4] drm/amd/display: Add DP 2.0 MST DM Support Lyude Paul
2 siblings, 0 replies; 3+ messages in thread
From: Lyude Paul @ 2021-10-25 22:30 UTC (permalink / raw)
To: dri-devel, amdgfx
Cc: Fangzhi Zuo, Lin, Wayne, Harry Wentland, Leo Li, Alex Deucher,
Christian König, Pan, Xinhui, David Airlie, Daniel Vetter,
Nicholas Kazlauskas, Anson Jacob, Aric Cyr, Jake Wang,
Meenakshikumar Somasundaram, Jimmy Kizito, Eric Yang, Lee Jones,
Lewis Huang, Roy Chan, Wenjing Liu, Jun Lei, Mark Morra,
Robin Singh, George Shen, Wesley Chalmers, Stylon Wang,
Rodrigo Siqueira, Rouven Czerwinski, Krunoslav Kovac,
Bhawanpreet Lakha, hvanzyll, Jayendran Ramani,
open list:AMD DISPLAY CORE, open list
From: Fangzhi Zuo <Jerry.Zuo@amd.com>
[Why]
configure/call DC interface for DP2 mst support. This is needed to make DP2
mst work.
[How]
- add encoding type, logging, mst update/reduce payload functions
Use the link encoding to determine the DP type (1.4 or 2.0) and add a
flag to dc_stream_update to determine whether to increase/reduce
payloads.
v2:
* add DP_UNKNOWN_ENCODING handling
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: "Lin, Wayne" <Wayne.Lin@amd.com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 14 +
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 292 ++++++++++++++++++
.../gpu/drm/amd/display/dc/core/dc_link_dp.c | 19 ++
drivers/gpu/drm/amd/display/dc/dc_link.h | 7 +
drivers/gpu/drm/amd/display/dc/dc_stream.h | 13 +
5 files changed, 345 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index da942e9f5142..782141ba8ac5 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2356,6 +2356,11 @@ static enum surface_update_type check_update_surfaces_for_stream(
if (stream_update->dsc_config)
su_flags->bits.dsc_changed = 1;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ if (stream_update->mst_bw_update)
+ su_flags->bits.mst_bw = 1;
+#endif
+
if (su_flags->raw != 0)
overall_type = UPDATE_TYPE_FULL;
@@ -2741,6 +2746,15 @@ static void commit_planes_do_stream_update(struct dc *dc,
if (stream_update->dsc_config)
dp_update_dsc_config(pipe_ctx);
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ if (stream_update->mst_bw_update) {
+ if (stream_update->mst_bw_update->is_increase)
+ dc_link_increase_mst_payload(pipe_ctx, stream_update->mst_bw_update->mst_stream_bw);
+ else
+ dc_link_reduce_mst_payload(pipe_ctx, stream_update->mst_bw_update->mst_stream_bw);
+ }
+#endif
+
if (stream_update->pending_test_pattern) {
dc_link_dp_set_test_pattern(stream->link,
stream->test_pattern.type,
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index ca5dc3c168ec..fd12561b70cc 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -3272,6 +3272,9 @@ static struct fixed31_32 get_pbn_from_timing(struct pipe_ctx *pipe_ctx)
static void update_mst_stream_alloc_table(
struct dc_link *link,
struct stream_encoder *stream_enc,
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ struct hpo_dp_stream_encoder *hpo_dp_stream_enc, // TODO: Rename stream_enc to dio_stream_enc?
+#endif
const struct dp_mst_stream_allocation_table *proposed_table)
{
struct link_mst_stream_allocation work_table[MAX_CONTROLLER_NUM] = {
@@ -3308,6 +3311,9 @@ static void update_mst_stream_alloc_table(
work_table[i].slot_count =
proposed_table->stream_allocations[i].slot_count;
work_table[i].stream_enc = stream_enc;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ work_table[i].hpo_dp_stream_enc = hpo_dp_stream_enc;
+#endif
}
}
@@ -3430,6 +3436,10 @@ enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx)
struct dc_link *link = stream->link;
struct link_encoder *link_encoder = NULL;
struct stream_encoder *stream_encoder = pipe_ctx->stream_res.stream_enc;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ struct hpo_dp_link_encoder *hpo_dp_link_encoder = link->hpo_dp_link_enc;
+ struct hpo_dp_stream_encoder *hpo_dp_stream_encoder = pipe_ctx->stream_res.hpo_dp_stream_enc;
+#endif
struct dp_mst_stream_allocation_table proposed_table = {0};
struct fixed31_32 avg_time_slots_per_mtp;
struct fixed31_32 pbn;
@@ -3457,7 +3467,14 @@ enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx)
&proposed_table,
true)) {
update_mst_stream_alloc_table(
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ link,
+ pipe_ctx->stream_res.stream_enc,
+ pipe_ctx->stream_res.hpo_dp_stream_enc,
+ &proposed_table);
+#else
link, pipe_ctx->stream_res.stream_enc, &proposed_table);
+#endif
}
else
DC_LOG_WARNING("Failed to update"
@@ -3471,23 +3488,56 @@ enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx)
link->mst_stream_alloc_table.stream_count);
for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+#if defined(CONFIG_DRM_AMD_DC_DCN)
DC_LOG_MST("stream_enc[%d]: %p "
+ "stream[%d].hpo_dp_stream_enc: %p "
"stream[%d].vcp_id: %d "
"stream[%d].slot_count: %d\n",
i,
(void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
i,
+ (void *) link->mst_stream_alloc_table.stream_allocations[i].hpo_dp_stream_enc,
+ i,
link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
i,
link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+#else
+ DC_LOG_MST("stream_enc[%d]: %p "
+ "stream[%d].vcp_id: %d "
+ "stream[%d].slot_count: %d\n",
+ i,
+ (void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+#endif
}
ASSERT(proposed_table.stream_count > 0);
/* program DP source TX for payload */
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ switch (dp_get_link_encoding_format(&link->cur_link_settings)) {
+ case DP_8b_10b_ENCODING:
+ link_encoder->funcs->update_mst_stream_allocation_table(
+ link_encoder,
+ &link->mst_stream_alloc_table);
+ break;
+ case DP_128b_132b_ENCODING:
+ hpo_dp_link_encoder->funcs->update_stream_allocation_table(
+ hpo_dp_link_encoder,
+ &link->mst_stream_alloc_table);
+ break;
+ case DP_UNKNOWN_ENCODING:
+ DC_LOG_ERROR("Failure: unknown encoding format\n");
+ return DC_ERROR_UNEXPECTED;
+ }
+#else
link_encoder->funcs->update_mst_stream_allocation_table(
link_encoder,
&link->mst_stream_alloc_table);
+#endif
/* send down message */
ret = dm_helpers_dp_mst_poll_for_allocation_change_trigger(
@@ -3510,13 +3560,191 @@ enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx)
pbn = get_pbn_from_timing(pipe_ctx);
avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot);
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ switch (dp_get_link_encoding_format(&link->cur_link_settings)) {
+ case DP_8b_10b_ENCODING:
+ stream_encoder->funcs->set_throttled_vcp_size(
+ stream_encoder,
+ avg_time_slots_per_mtp);
+ break;
+ case DP_128b_132b_ENCODING:
+ hpo_dp_link_encoder->funcs->set_throttled_vcp_size(
+ hpo_dp_link_encoder,
+ hpo_dp_stream_encoder->inst,
+ avg_time_slots_per_mtp);
+ break;
+ case DP_UNKNOWN_ENCODING:
+ DC_LOG_ERROR("Failure: unknown encoding format\n");
+ return DC_ERROR_UNEXPECTED;
+ }
+#else
stream_encoder->funcs->set_throttled_vcp_size(
stream_encoder,
avg_time_slots_per_mtp);
+#endif
+
+ return DC_OK;
+
+}
+
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+enum dc_status dc_link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t bw_in_kbps)
+{
+ struct dc_stream_state *stream = pipe_ctx->stream;
+ struct dc_link *link = stream->link;
+ struct fixed31_32 avg_time_slots_per_mtp;
+ struct fixed31_32 pbn;
+ struct fixed31_32 pbn_per_slot;
+ struct link_encoder *link_encoder = link->link_enc;
+ struct stream_encoder *stream_encoder = pipe_ctx->stream_res.stream_enc;
+ struct dp_mst_stream_allocation_table proposed_table = {0};
+ uint8_t i;
+ enum act_return_status ret;
+ DC_LOGGER_INIT(link->ctx->logger);
+
+ /* decrease throttled vcp size */
+ pbn_per_slot = get_pbn_per_slot(stream);
+ pbn = get_pbn_from_bw_in_kbps(bw_in_kbps);
+ avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot);
+
+ stream_encoder->funcs->set_throttled_vcp_size(
+ stream_encoder,
+ avg_time_slots_per_mtp);
+
+ /* send ALLOCATE_PAYLOAD sideband message with updated pbn */
+ dm_helpers_dp_mst_send_payload_allocation(
+ stream->ctx,
+ stream,
+ true);
+
+ /* notify immediate branch device table update */
+ if (dm_helpers_dp_mst_write_payload_allocation_table(
+ stream->ctx,
+ stream,
+ &proposed_table,
+ true)) {
+ /* update mst stream allocation table software state */
+ update_mst_stream_alloc_table(
+ link,
+ pipe_ctx->stream_res.stream_enc,
+ pipe_ctx->stream_res.hpo_dp_stream_enc,
+ &proposed_table);
+ } else {
+ DC_LOG_WARNING("Failed to update"
+ "MST allocation table for"
+ "pipe idx:%d\n",
+ pipe_ctx->pipe_idx);
+ }
+
+ DC_LOG_MST("%s "
+ "stream_count: %d: \n ",
+ __func__,
+ link->mst_stream_alloc_table.stream_count);
+
+ for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+ DC_LOG_MST("stream_enc[%d]: %p "
+ "stream[%d].vcp_id: %d "
+ "stream[%d].slot_count: %d\n",
+ i,
+ (void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+ }
+
+ ASSERT(proposed_table.stream_count > 0);
+
+ /* update mst stream allocation table hardware state */
+ link_encoder->funcs->update_mst_stream_allocation_table(
+ link_encoder,
+ &link->mst_stream_alloc_table);
+
+ /* poll for immediate branch device ACT handled */
+ ret = dm_helpers_dp_mst_poll_for_allocation_change_trigger(
+ stream->ctx,
+ stream);
return DC_OK;
+}
+
+enum dc_status dc_link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t bw_in_kbps)
+{
+ struct dc_stream_state *stream = pipe_ctx->stream;
+ struct dc_link *link = stream->link;
+ struct fixed31_32 avg_time_slots_per_mtp;
+ struct fixed31_32 pbn;
+ struct fixed31_32 pbn_per_slot;
+ struct link_encoder *link_encoder = link->link_enc;
+ struct stream_encoder *stream_encoder = pipe_ctx->stream_res.stream_enc;
+ struct dp_mst_stream_allocation_table proposed_table = {0};
+ uint8_t i;
+ enum act_return_status ret;
+ DC_LOGGER_INIT(link->ctx->logger);
+
+ /* notify immediate branch device table update */
+ if (dm_helpers_dp_mst_write_payload_allocation_table(
+ stream->ctx,
+ stream,
+ &proposed_table,
+ true)) {
+ /* update mst stream allocation table software state */
+ update_mst_stream_alloc_table(
+ link,
+ pipe_ctx->stream_res.stream_enc,
+ pipe_ctx->stream_res.hpo_dp_stream_enc,
+ &proposed_table);
+ }
+
+ DC_LOG_MST("%s "
+ "stream_count: %d: \n ",
+ __func__,
+ link->mst_stream_alloc_table.stream_count);
+
+ for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+ DC_LOG_MST("stream_enc[%d]: %p "
+ "stream[%d].vcp_id: %d "
+ "stream[%d].slot_count: %d\n",
+ i,
+ (void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+ }
+
+ ASSERT(proposed_table.stream_count > 0);
+
+ /* update mst stream allocation table hardware state */
+ link_encoder->funcs->update_mst_stream_allocation_table(
+ link_encoder,
+ &link->mst_stream_alloc_table);
+
+ /* poll for immediate branch device ACT handled */
+ ret = dm_helpers_dp_mst_poll_for_allocation_change_trigger(
+ stream->ctx,
+ stream);
+
+ if (ret != ACT_LINK_LOST) {
+ /* send ALLOCATE_PAYLOAD sideband message with updated pbn */
+ dm_helpers_dp_mst_send_payload_allocation(
+ stream->ctx,
+ stream,
+ true);
+ }
+ /* increase throttled vcp size */
+ pbn = get_pbn_from_bw_in_kbps(bw_in_kbps);
+ pbn_per_slot = get_pbn_per_slot(stream);
+ avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot);
+
+ stream_encoder->funcs->set_throttled_vcp_size(
+ stream_encoder,
+ avg_time_slots_per_mtp);
+
+ return DC_OK;
}
+#endif
static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
{
@@ -3524,6 +3752,10 @@ static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
struct dc_link *link = stream->link;
struct link_encoder *link_encoder = NULL;
struct stream_encoder *stream_encoder = pipe_ctx->stream_res.stream_enc;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ struct hpo_dp_link_encoder *hpo_dp_link_encoder = link->hpo_dp_link_enc;
+ struct hpo_dp_stream_encoder *hpo_dp_stream_encoder = pipe_ctx->stream_res.hpo_dp_stream_enc;
+#endif
struct dp_mst_stream_allocation_table proposed_table = {0};
struct fixed31_32 avg_time_slots_per_mtp = dc_fixpt_from_int(0);
uint8_t i;
@@ -3545,9 +3777,28 @@ static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
*/
/* slot X.Y */
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ switch (dp_get_link_encoding_format(&link->cur_link_settings)) {
+ case DP_8b_10b_ENCODING:
+ stream_encoder->funcs->set_throttled_vcp_size(
+ stream_encoder,
+ avg_time_slots_per_mtp);
+ break;
+ case DP_128b_132b_ENCODING:
+ hpo_dp_link_encoder->funcs->set_throttled_vcp_size(
+ hpo_dp_link_encoder,
+ hpo_dp_stream_encoder->inst,
+ avg_time_slots_per_mtp);
+ break;
+ case DP_UNKNOWN_ENCODING:
+ DC_LOG_ERROR("Failure: unknown encoding format\n");
+ return DC_ERROR_UNEXPECTED;
+ }
+#else
stream_encoder->funcs->set_throttled_vcp_size(
stream_encoder,
avg_time_slots_per_mtp);
+#endif
/* TODO: which component is responsible for remove payload table? */
if (mst_mode) {
@@ -3557,8 +3808,16 @@ static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
&proposed_table,
false)) {
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ update_mst_stream_alloc_table(
+ link,
+ pipe_ctx->stream_res.stream_enc,
+ pipe_ctx->stream_res.hpo_dp_stream_enc,
+ &proposed_table);
+#else
update_mst_stream_alloc_table(
link, pipe_ctx->stream_res.stream_enc, &proposed_table);
+#endif
}
else {
DC_LOG_WARNING("Failed to update"
@@ -3574,6 +3833,20 @@ static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
link->mst_stream_alloc_table.stream_count);
for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ DC_LOG_MST("stream_enc[%d]: %p "
+ "stream[%d].hpo_dp_stream_enc: %p "
+ "stream[%d].vcp_id: %d "
+ "stream[%d].slot_count: %d\n",
+ i,
+ (void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+ i,
+ (void *) link->mst_stream_alloc_table.stream_allocations[i].hpo_dp_stream_enc,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+ i,
+ link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+#else
DC_LOG_MST("stream_enc[%d]: %p "
"stream[%d].vcp_id: %d "
"stream[%d].slot_count: %d\n",
@@ -3583,11 +3856,30 @@ static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
i,
link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+#endif
}
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ switch (dp_get_link_encoding_format(&link->cur_link_settings)) {
+ case DP_8b_10b_ENCODING:
+ link_encoder->funcs->update_mst_stream_allocation_table(
+ link_encoder,
+ &link->mst_stream_alloc_table);
+ break;
+ case DP_128b_132b_ENCODING:
+ hpo_dp_link_encoder->funcs->update_stream_allocation_table(
+ hpo_dp_link_encoder,
+ &link->mst_stream_alloc_table);
+ break;
+ case DP_UNKNOWN_ENCODING:
+ DC_LOG_ERROR("Failure: unknown encoding format\n");
+ return DC_ERROR_UNEXPECTED;
+ }
+#else
link_encoder->funcs->update_mst_stream_allocation_table(
link_encoder,
&link->mst_stream_alloc_table);
+#endif
if (mst_mode) {
dm_helpers_dp_mst_poll_for_allocation_change_trigger(
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 54662d74c65a..ab13d2304f3e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -5993,6 +5993,25 @@ enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings
}
#if defined(CONFIG_DRM_AMD_DC_DCN)
+enum dp_link_encoding dc_link_dp_mst_decide_link_encoding_format(const struct dc_link *link)
+{
+ struct dc_link_settings link_settings = {0};
+
+ if (!dc_is_dp_signal(link->connector_signal))
+ return DP_UNKNOWN_ENCODING;
+
+ if (link->preferred_link_setting.lane_count !=
+ LANE_COUNT_UNKNOWN &&
+ link->preferred_link_setting.link_rate !=
+ LINK_RATE_UNKNOWN) {
+ link_settings = link->preferred_link_setting;
+ } else {
+ decide_mst_link_settings(link, &link_settings);
+ }
+
+ return dp_get_link_encoding_format(&link_settings);
+}
+
// TODO - DP2.0 Link: Fix get_lane_status to handle LTTPR offset (SST and MST)
static void get_lane_status(
struct dc_link *link,
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index 69b008bafbbc..d9fb43d99dc0 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -296,6 +296,10 @@ enum dc_detect_reason {
bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
bool dc_link_get_hpd_state(struct dc_link *dc_link);
enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx);
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+enum dc_status dc_link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
+enum dc_status dc_link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
+#endif
/* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
* Return:
@@ -425,4 +429,7 @@ uint32_t dc_bandwidth_in_kbps_from_timing(
bool dc_link_is_fec_supported(const struct dc_link *link);
bool dc_link_should_enable_fec(const struct dc_link *link);
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+enum dp_link_encoding dc_link_dp_mst_decide_link_encoding_format(const struct dc_link *link);
+#endif
#endif /* DC_LINK_H_ */
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index b8ebc1f09538..e37c4a10bfd5 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -115,6 +115,13 @@ struct periodic_interrupt_config {
int lines_offset;
};
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+struct dc_mst_stream_bw_update {
+ bool is_increase; // is bandwidth reduced or increased
+ uint32_t mst_stream_bw; // new mst bandwidth in kbps
+};
+#endif
+
union stream_update_flags {
struct {
uint32_t scaling:1;
@@ -125,6 +132,9 @@ union stream_update_flags {
uint32_t gamut_remap:1;
uint32_t wb_update:1;
uint32_t dsc_changed : 1;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ uint32_t mst_bw : 1;
+#endif
} bits;
uint32_t raw;
@@ -278,6 +288,9 @@ struct dc_stream_update {
struct dc_writeback_update *wb_update;
struct dc_dsc_config *dsc_config;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ struct dc_mst_stream_bw_update *mst_bw_update;
+#endif
struct dc_transfer_func *func_shaper;
struct dc_3dlut *lut3d_func;
--
2.31.1
^ permalink raw reply [flat|nested] 3+ messages in thread* [PATCH v5 4/4] drm/amd/display: Add DP 2.0 MST DM Support
[not found] <20211025223029.300891-1-lyude@redhat.com>
2021-10-25 22:30 ` [PATCH v5 1/4] drm: Remove slot checks in dp mst topology during commit Lyude Paul
2021-10-25 22:30 ` [PATCH v5 3/4] drm/amd/display: Add DP 2.0 MST DC Support Lyude Paul
@ 2021-10-25 22:30 ` Lyude Paul
2 siblings, 0 replies; 3+ messages in thread
From: Lyude Paul @ 2021-10-25 22:30 UTC (permalink / raw)
To: dri-devel, amdgfx
Cc: Bhawanpreet Lakha, Lin, Wayne, Harry Wentland, Leo Li,
Alex Deucher, Christian König, Pan, Xinhui, David Airlie,
Daniel Vetter, Nicholas Kazlauskas, Rodrigo Siqueira,
Qingqing Zhuo, Simon Ser, Bas Nieuwenhuizen, Aurabindo Pillai,
Jude Shih, Nikola Cornij, Roman Li, Mikita Lipski, Anson Jacob,
Eryk Brol, Stylon Wang, Victor Lu, Nirmoy Das, Sean Paul,
Fernando Ramos, Fangzhi Zuo, Leo (Hanghong) Ma, Colin Ian King,
Zhan Liu, Bing Guo, open list:AMD DISPLAY CORE, open list
From: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
[Why]
Add DP2 MST and debugfs support
[How]
Update the slot info based on the link encoding format
Reviewed-by: "Lin, Wayne" <Wayne.Lin@amd.com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 29 +++++++++++++++++++
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 3 ++
.../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 5 +++-
3 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index f35561b5a465..ecdeeedb1cde 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10684,6 +10684,8 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
#if defined(CONFIG_DRM_AMD_DC_DCN)
struct dsc_mst_fairness_vars vars[MAX_PIPES];
#endif
+ struct drm_dp_mst_topology_state *mst_state;
+ struct drm_dp_mst_topology_mgr *mgr;
trace_amdgpu_dm_atomic_check_begin(state);
@@ -10891,6 +10893,33 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
lock_and_validation_needed = true;
}
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ /* set the slot info for each mst_state based on the link encoding format */
+ for_each_new_mst_mgr_in_state(state, mgr, mst_state, i) {
+ struct amdgpu_dm_connector *aconnector;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter iter;
+ u8 link_coding_cap;
+
+ if (!mgr->mst_state )
+ continue;
+
+ drm_connector_list_iter_begin(dev, &iter);
+ drm_for_each_connector_iter(connector, &iter) {
+ int id = connector->index;
+
+ if (id == mst_state->mgr->conn_base_id) {
+ aconnector = to_amdgpu_dm_connector(connector);
+ link_coding_cap = dc_link_dp_mst_decide_link_encoding_format(aconnector->dc_link);
+ drm_dp_mst_update_slots(mst_state, link_coding_cap);
+
+ break;
+ }
+ }
+ drm_connector_list_iter_end(&iter);
+
+ }
+#endif
/**
* Streams and planes are reset when there are changes that affect
* bandwidth. Anything that affects bandwidth needs to go through
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index 814f67d86a3c..3d44896149a2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -294,6 +294,9 @@ static ssize_t dp_link_settings_write(struct file *f, const char __user *buf,
case LINK_RATE_RBR2:
case LINK_RATE_HIGH2:
case LINK_RATE_HIGH3:
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ case LINK_RATE_UHBR10:
+#endif
break;
default:
valid_input = false;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 6169488e2011..53b5cc7b0679 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -219,6 +219,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
struct drm_dp_mst_topology_mgr *mst_mgr;
struct drm_dp_mst_port *mst_port;
bool ret;
+ u8 link_coding_cap;
aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context;
/* Accessing the connector state is required for vcpi_slots allocation
@@ -238,6 +239,8 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
mst_port = aconnector->port;
+ link_coding_cap = dc_link_dp_mst_decide_link_encoding_format(aconnector->dc_link);
+
if (enable) {
ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port,
@@ -251,7 +254,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
}
/* It's OK for this to fail */
- drm_dp_update_payload_part1(mst_mgr, 1);
+ drm_dp_update_payload_part1(mst_mgr, (link_coding_cap == DP_CAP_ANSI_128B132B) ? 0:1);
/* mst_mgr->->payloads are VC payload notify MST branch using DPCD or
* AUX message. The sequence is slot 1-63 allocated sequence for each
--
2.31.1
^ permalink raw reply [flat|nested] 3+ messages in thread