From: Mikita Lipski <mikita.lipski@xxxxxxx>
- 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 amdgpu connector 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
Cc: Jerry Zuo <Jerry.Zuo@xxxxxxx>
Cc: Harry Wentland <harry.wentland@xxxxxxx>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Cc: Lyude Paul <lyude@xxxxxxxxxx>
Signed-off-by: Mikita Lipski <mikita.lipski@xxxxxxx>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 42 +++++++++++++++++++
.../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 ++++++++++++++
4 files changed, 81 insertions(+), 39 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 239b1ae86007..3fc1afccbb33 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4573,6 +4573,41 @@ 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 (!dm_new_crtc_state)
+ return 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;
+ aconnector->pbn = drm_dp_calc_pbn_mode(clock, bpp);
+ }
+ aconnector->vcpi_slots = drm_dp_atomic_find_vcpi_slots(state,
+ mst_mgr,
+ mst_port,
+ aconnector->pbn);
+
+ if (aconnector->vcpi_slots < 0) {
+ DRM_DEBUG_ATOMIC("failed finding vcpi slots: %d\n", aconnector->vcpi_slots);
+ return aconnector->vcpi_slots;
+ }
return 0;
}
@@ -5197,6 +5232,8 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
aconnector->base.dpms = DRM_MODE_DPMS_OFF;
aconnector->hpd.hpd = AMDGPU_HPD_NONE; /* not used */
aconnector->audio_inst = -1;
+ aconnector->vcpi_slots = 0;
+ aconnector->pbn = 0;
mutex_init(&aconnector->hpd_lock);
/*
@@ -7592,6 +7629,11 @@ 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..3ce104324096 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -280,6 +280,10 @@ struct amdgpu_dm_connector {
struct amdgpu_dm_connector *mst_port;
struct amdgpu_encoder *mst_encoder;
+ /* MST specific */
+ uint32_t vcpi_slots;
+ uint32_t pbn;
+
/* TODO see if we can merge with ddc_bus or make a dm_connector */
struct amdgpu_i2c_adapter *i2c;
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..5256abe32e92 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,
+ aconnector->pbn,
+ aconnector->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)
--
2.17.1
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