linux-kernel - [PATCH v4 05/17] drm/i915/display: Add handling for new "active bpc" property

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Message-Id: <20210618091116.14428-6-wse@tuxedocomputers.com>
Date:   Fri, 18 Jun 2021 11:11:04 +0200
From:   Werner Sembach <wse@...edocomputers.com>
To:     harry.wentland@....com, sunpeng.li@....com,
        alexander.deucher@....com, christian.koenig@....com,
        airlied@...ux.ie, daniel@...ll.ch,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, jani.nikula@...ux.intel.com,
        joonas.lahtinen@...ux.intel.com, rodrigo.vivi@...el.com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org
Cc:     Werner Sembach <wse@...edocomputers.com>
Subject: [PATCH v4 05/17] drm/i915/display: Add handling for new "active bpc" property

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

Signed-off-by: Werner Sembach <wse@...edocomputers.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 17 +++++++++++++++++
 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, 30 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..4b00d2f3b3c8 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 +10910,20 @@ 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->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 5c9222283044..2d7b5318ae7b 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