[PATCH v3] drm/amd/display: Add MST atomic routines
mikita.lipski at amd.com
mikita.lipski at amd.com
Wed Oct 16 14:25:53 UTC 2019
From: Mikita Lipski <mikita.lipski at amd.com>
- Adding encoder atomic check to find vcpi slots for a connector
- Using DRM helper functions to calculate PBN
- Adding connector atomic check to release vcpi slots if connector
loses CRTC
- Calculate PBN and VCPI slots only once during atomic
check and store them on crtc_state to eliminate
redundant calculation
- Call drm_dp_mst_atomic_check to verify validity of MST topology
during state atomic check
v2: squashed previous 3 separate patches, removed DSC PBN calculation,
and added PBN and VCPI slots properties to amdgpu connector
v3:
- moved vcpi_slots and pbn properties to dm_crtc_state and dc_stream_state
- updates stream's vcpi_slots and pbn on commit
- separated patch from the DSC MST series
Cc: Jerry Zuo <Jerry.Zuo at amd.com>
Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
Cc: Lyude Paul <lyude at redhat.com>
Signed-off-by: Mikita Lipski <mikita.lipski at amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 59 ++++++++++++++++++-
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 4 ++
.../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 42 +------------
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 32 ++++++++++
drivers/gpu/drm/amd/display/dc/dc_stream.h | 3 +
5 files changed, 99 insertions(+), 41 deletions(-)
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 10cce584719f..c37c384a3365 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3811,6 +3811,9 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
update_stream_signal(stream, sink);
+ stream->vcpi_slots = 0;
+ stream->pbn = 0;
+
if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
mod_build_hf_vsif_infopacket(stream, &stream->vsp_infopacket, false, false);
@@ -3889,6 +3892,8 @@ dm_crtc_duplicate_state(struct drm_crtc *crtc)
state->crc_src = cur->crc_src;
state->cm_has_degamma = cur->cm_has_degamma;
state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb;
+ state->vcpi_slots = cur->vcpi_slots;
+ state->pbn = cur->pbn;
/* TODO Duplicate dc_stream after objects are stream object is flattened */
@@ -4587,6 +4592,38 @@ static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
+ struct drm_atomic_state *state = crtc_state->state;
+ struct drm_connector *connector = conn_state->connector;
+ struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
+ struct dm_crtc_state *dm_new_crtc_state = to_dm_crtc_state(crtc_state);
+ const struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
+ struct drm_dp_mst_topology_mgr *mst_mgr;
+ struct drm_dp_mst_port *mst_port;
+ int clock, bpp = 0;
+
+ if (!aconnector->port || !aconnector->dc_sink)
+ return 0;
+
+ mst_port = aconnector->port;
+ mst_mgr = &aconnector->mst_port->mst_mgr;
+
+ if (!crtc_state->connectors_changed && !crtc_state->mode_changed)
+ return 0;
+
+ if(!state->duplicated) {
+ bpp = (uint8_t)connector->display_info.bpc * 3;
+ clock = adjusted_mode->clock;
+ dm_new_crtc_state->pbn = drm_dp_calc_pbn_mode(clock, bpp);
+ }
+ dm_new_crtc_state->vcpi_slots = drm_dp_atomic_find_vcpi_slots(state,
+ mst_mgr,
+ mst_port,
+ dm_new_crtc_state->pbn);
+
+ if (dm_new_crtc_state->vcpi_slots < 0) {
+ DRM_DEBUG_ATOMIC("failed finding vcpi slots: %d\n", dm_new_crtc_state->vcpi_slots);
+ return dm_new_crtc_state->vcpi_slots;
+ }
return 0;
}
@@ -6127,6 +6164,9 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
acrtc_state->stream->out_transfer_func;
}
+ acrtc_state->stream->vcpi_slots = acrtc_state->vcpi_slots;
+ acrtc_state->stream->pbn = acrtc_state->pbn;
+
acrtc_state->stream->abm_level = acrtc_state->abm_level;
if (acrtc_state->abm_level != dm_old_crtc_state->abm_level)
bundle->stream_update.abm_level = &acrtc_state->abm_level;
@@ -6527,7 +6567,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
struct dc_stream_update stream_update;
struct dc_info_packet hdr_packet;
struct dc_stream_status *status = NULL;
- bool abm_changed, hdr_changed, scaling_changed;
+ bool abm_changed, hdr_changed, scaling_changed, mst_vcpi_changed;
memset(&dummy_updates, 0, sizeof(dummy_updates));
memset(&stream_update, 0, sizeof(stream_update));
@@ -6553,7 +6593,12 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
hdr_changed =
is_hdr_metadata_different(old_con_state, new_con_state);
- if (!scaling_changed && !abm_changed && !hdr_changed)
+ mst_vcpi_changed = (dm_new_crtc_state->vcpi_slots !=
+ dm_old_crtc_state->vcpi_slots) ||
+ (dm_new_crtc_state->pbn !=
+ dm_old_crtc_state->pbn);
+
+ if (!scaling_changed && !abm_changed && !hdr_changed && !mst_vcpi_changed)
continue;
stream_update.stream = dm_new_crtc_state->stream;
@@ -6576,6 +6621,11 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
stream_update.hdr_static_metadata = &hdr_packet;
}
+ if (mst_vcpi_changed) {
+ dm_new_crtc_state->stream->vcpi_slots = dm_new_crtc_state->vcpi_slots;
+ dm_new_crtc_state->stream->pbn = dm_new_crtc_state->pbn;
+ }
+
status = dc_stream_get_status(dm_new_crtc_state->stream);
WARN_ON(!status);
WARN_ON(!status->plane_count);
@@ -7606,6 +7656,11 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
if (ret)
goto fail;
+ /* Perform validation of MST topology in the state*/
+ ret = drm_dp_mst_atomic_check(state);
+ if (ret)
+ goto fail;
+
if (state->legacy_cursor_update) {
/*
* This is a fast cursor update coming from the plane update
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index c6fdebee7189..6de9a8e582f1 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -338,6 +338,10 @@ struct dm_crtc_state {
struct dc_info_packet vrr_infopacket;
int abm_level;
+
+ /* MST specific */
+ int vcpi_slots;
+ int pbn;
};
#define to_dm_crtc_state(x) container_of(x, struct dm_crtc_state, base)
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 11e5784aa62a..21e364c92df5 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
@@ -184,11 +184,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
struct amdgpu_dm_connector *aconnector;
struct drm_dp_mst_topology_mgr *mst_mgr;
struct drm_dp_mst_port *mst_port;
- int slots = 0;
bool ret;
- int clock;
- int bpp = 0;
- int pbn = 0;
aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context;
@@ -203,42 +199,10 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
mst_port = aconnector->port;
if (enable) {
- clock = stream->timing.pix_clk_100hz / 10;
-
- switch (stream->timing.display_color_depth) {
-
- case COLOR_DEPTH_666:
- bpp = 6;
- break;
- case COLOR_DEPTH_888:
- bpp = 8;
- break;
- case COLOR_DEPTH_101010:
- bpp = 10;
- break;
- case COLOR_DEPTH_121212:
- bpp = 12;
- break;
- case COLOR_DEPTH_141414:
- bpp = 14;
- break;
- case COLOR_DEPTH_161616:
- bpp = 16;
- break;
- default:
- ASSERT(bpp != 0);
- break;
- }
-
- bpp = bpp * 3;
-
- /* TODO need to know link rate */
-
- pbn = drm_dp_calc_pbn_mode(clock, bpp);
-
- slots = drm_dp_find_vcpi_slots(mst_mgr, pbn);
- ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port, pbn, slots);
+ ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port,
+ stream->pbn,
+ stream->vcpi_slots);
if (!ret)
return false;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 3af2b429ff1b..7f3ce29bd14c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -250,10 +250,42 @@ dm_mst_atomic_best_encoder(struct drm_connector *connector,
return &to_amdgpu_dm_connector(connector)->mst_encoder->base;
}
+static int dm_dp_mst_atomic_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector_state *new_conn_state =
+ drm_atomic_get_new_connector_state(state, connector);
+ struct drm_connector_state *old_conn_state =
+ drm_atomic_get_old_connector_state(state, connector);
+ struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
+ struct drm_crtc_state *new_crtc_state;
+ struct drm_dp_mst_topology_mgr *mst_mgr;
+ struct drm_dp_mst_port *mst_port;
+
+ mst_port = aconnector->port;
+ mst_mgr = &aconnector->mst_port->mst_mgr;
+
+ if (!old_conn_state->crtc)
+ return 0;
+
+ if (new_conn_state->crtc) {
+ new_crtc_state = drm_atomic_get_old_crtc_state(state, new_conn_state->crtc);
+ if (!new_crtc_state ||
+ !drm_atomic_crtc_needs_modeset(new_crtc_state) ||
+ new_crtc_state->enable)
+ return 0;
+ }
+
+ return drm_dp_atomic_release_vcpi_slots(state,
+ mst_mgr,
+ mst_port);
+}
+
static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
.get_modes = dm_dp_mst_get_modes,
.mode_valid = amdgpu_dm_connector_mode_valid,
.atomic_best_encoder = dm_mst_atomic_best_encoder,
+ .atomic_check = dm_dp_mst_atomic_check,
};
static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index fdb6adc37857..010041096505 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -208,6 +208,9 @@ struct dc_stream_state {
unsigned int num_wb_info;
struct dc_writeback_info writeback_info[MAX_DWB_PIPES];
#endif
+
+ unsigned int vcpi_slots;
+ unsigned int pbn;
/* Computed state bits */
bool mode_changed : 1;
--
2.17.1
More information about the amd-gfx
mailing list