From: Mikita Lipski <mikita.lip...@amd.com>
[why]
In order to comply with new MST atomic check
we have to find and add VCPI slots to the state
during atomic check whenever their is a change on
mode or connector.
[how]
- Verify that it is a MST connection
- Convert new stream's clock and bpp
- Calculate PBN based on stream parameters
- Find and add VCPI slots to the state
Cc: Lyude Paul <ly...@redhat.com>
Signed-off-by: Mikita Lipski <mikita.lip...@amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 59 +++++++++++++++++++
1 file changed, 59 insertions(+)
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 7b0ca2e1ed8b..d700b962d338 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4432,6 +4432,65 @@ 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 pbn, slots,clock, bpp = 0;
+
+ if (!dm_new_crtc_state)
+ return 0;
+
+ if (!aconnector || !aconnector->port)
+ return 0;
+
+ mst_port = aconnector->port;
+ mst_mgr = &aconnector->mst_port->mst_mgr;
+
+ if (!mst_mgr->mst_state)
+ return 0;
+
+ if (!crtc_state->connectors_changed && !crtc_state->mode_changed)
+ return 0;
+
+ switch (convert_color_depth_from_display_info(connector, conn_state)) {
+ 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 *= 3;
+ clock = adjusted_mode->clock;
+ pbn = drm_dp_calc_pbn_mode(clock, bpp);
+ slots = drm_dp_atomic_find_vcpi_slots(state,
+ mst_mgr,
+ mst_port,
+ pbn);
+ if (slots < 0) {
+ DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
+ return slots;
+ }
return 0;
}
--
2.17.1
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