dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/amd/display: Add DP 2.0 MST DC Support

Browse Source 
[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>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025223825.301703-4-lyude@redhat.com
This commit is contained in:
Fangzhi Zuo
2021-10-25 21:21:08 -04:00
committed by Lyude Paul
parent d6c6a76f80
commit d740e0bf8e
5 changed files with 345 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/amd/display/dc/core/dc.c
+14
View File
@@ -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,
drivers/gpu/drm/amd/display/dc/core/dc_link.c
+292
View File
@@ -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"
@@ -3471,6 +3488,20 @@ 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",
@@ -3480,14 +3511,33 @@ enum dc_status dc_link_allocate_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
}
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(
@@ -3510,20 +3560,202 @@ 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)
{
struct dc_stream_state *stream = pipe_ctx->stream;
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(
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+19
View File
@@ -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,
drivers/gpu/drm/amd/display/dc/dc_link.h
+7
View File
@@ -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_ */
drivers/gpu/drm/amd/display/dc/dc_stream.h
+13
View File
@@ -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;