This commit implements the "active bpc" drm property for the Intel GPU
driver.

Signed-off-by: Werner Sembach <w...@tuxedocomputers.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 19 +++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_dp.c      |  7 +++++--
 drivers/gpu/drm/i915/display/intel_dp_mst.c  |  5 +++++
 drivers/gpu/drm/i915/display/intel_hdmi.c    |  4 +++-
 4 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index 6be1b31af07b..1b63d1404d06 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -10839,6 +10839,9 @@ static int intel_atomic_commit(struct drm_device *dev,
 {
        struct intel_atomic_state *state = to_intel_atomic_state(_state);
        struct drm_i915_private *dev_priv = to_i915(dev);
+       struct drm_connector *connector;
+       struct drm_connector_state *new_conn_state;
+       int i;
        int ret = 0;
 
        state->wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
@@ -10907,6 +10910,22 @@ static int intel_atomic_commit(struct drm_device *dev,
        intel_shared_dpll_swap_state(state);
        intel_atomic_track_fbs(state);
 
+       /* Extract information from crtc to communicate it to userspace as 
connector properties */
+       for_each_new_connector_in_state(&state->base, connector, 
new_conn_state, i) {
+               struct intel_crtc *crtc = to_intel_crtc(new_conn_state->crtc);
+
+               if (crtc) {
+                       struct intel_crtc_state *new_crtc_state =
+                               intel_atomic_get_new_crtc_state(state, crtc);
+
+                       drm_connector_set_active_bpc_property(connector,
+                               new_crtc_state->dsc.compression_enable ?
+                                       new_crtc_state->dsc.compressed_bpp / 3 :
+                                       new_crtc_state->pipe_bpp / 3);
+               } else
+                       drm_connector_set_active_bpc_property(connector, 0);
+       }
+
        drm_atomic_state_get(&state->base);
        INIT_WORK(&state->base.commit_work, intel_atomic_commit_work);
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
b/drivers/gpu/drm/i915/display/intel_dp.c
index 6cc03b9e4321..815bc313b954 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4688,10 +4688,13 @@ intel_dp_add_properties(struct intel_dp *intel_dp, 
struct drm_connector *connect
                intel_attach_force_audio_property(connector);
 
        intel_attach_broadcast_rgb_property(connector);
-       if (HAS_GMCH(dev_priv))
+       if (HAS_GMCH(dev_priv)) {
                drm_connector_attach_max_bpc_property(connector, 6, 10);
-       else if (DISPLAY_VER(dev_priv) >= 5)
+               drm_connector_attach_active_bpc_property(connector, 6, 10);
+       } else if (DISPLAY_VER(dev_priv) >= 5) {
                drm_connector_attach_max_bpc_property(connector, 6, 12);
+               drm_connector_attach_active_bpc_property(connector, 6, 12);
+       }
 
        /* Register HDMI colorspace for case of lspcon */
        if (intel_bios_is_lspcon_present(dev_priv, port)) {
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c 
b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index b170e272bdee..16bfc59570a5 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -851,6 +851,11 @@ static struct drm_connector 
*intel_dp_add_mst_connector(struct drm_dp_mst_topolo
        if (connector->max_bpc_property)
                drm_connector_attach_max_bpc_property(connector, 6, 12);
 
+       connector->active_bpc_property =
+               intel_dp->attached_connector->base.active_bpc_property;
+       if (connector->active_bpc_property)
+               drm_connector_attach_active_bpc_property(connector, 6, 12);
+
        return connector;
 
 err:
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c 
b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 7e51c98c475e..9160e21ac9d6 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2513,8 +2513,10 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, 
struct drm_connector *c
        if (DISPLAY_VER(dev_priv) >= 10)
                drm_connector_attach_hdr_output_metadata_property(connector);
 
-       if (!HAS_GMCH(dev_priv))
+       if (!HAS_GMCH(dev_priv)) {
                drm_connector_attach_max_bpc_property(connector, 8, 12);
+               drm_connector_attach_active_bpc_property(connector, 8, 12);
+       }
 }
 
 /*
-- 
2.25.1

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