linux-kernel - [PATCH 16/22] drm/vkms: Introduce config for connector supported colorspace

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20251018-vkms-all-config-v1-16-a7760755d92d@bootlin.com>
Date: Sat, 18 Oct 2025 04:01:16 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Haneen Mohammed <hamohammed.sa@...il.com>, 
 Simona Vetter <simona@...ll.ch>, Melissa Wen <melissa.srw@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, jose.exposito89@...il.com, 
 Jonathan Corbet <corbet@....net>
Cc: victoria@...tem76.com, sebastian.wick@...hat.com, victoria@...tem76.com, 
 airlied@...il.com, thomas.petazzoni@...tlin.com, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-doc@...r.kernel.org, Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH 16/22] drm/vkms: Introduce config for connector supported
 colorspace

To emulate some HDR features of displays, it is required to expose some
properties on HDMI, eDP and DP connectors.

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/vkms/tests/vkms_config_test.c |  3 +++
 drivers/gpu/drm/vkms/vkms_config.c            |  1 +
 drivers/gpu/drm/vkms/vkms_config.h            | 26 ++++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_connector.c         | 15 +++++++++++++++
 4 files changed, 45 insertions(+)

diff --git a/drivers/gpu/drm/vkms/tests/vkms_config_test.c b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
index 8633210342a4..a89ccd75060d 100644
--- a/drivers/gpu/drm/vkms/tests/vkms_config_test.c
+++ b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
@@ -187,6 +187,9 @@ static void vkms_config_test_default_config(struct kunit *test)
 	vkms_config_for_each_connector(config, connector_cfg) {
 		KUNIT_EXPECT_EQ(test, vkms_config_connector_get_type(connector_cfg),
 				DRM_MODE_CONNECTOR_VIRTUAL);
+		KUNIT_EXPECT_EQ(test,
+				vkms_config_connector_get_supported_colorspaces(connector_cfg),
+				0);
 	}
 
 	KUNIT_EXPECT_TRUE(test, vkms_config_is_valid(config));
diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index 20750c9f6d08..56e2082b91c9 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -772,6 +772,7 @@ struct vkms_config_connector *vkms_config_create_connector(struct vkms_config *c
 	connector_cfg->config = config;
 	connector_cfg->status = connector_status_connected;
 	vkms_config_connector_set_type(connector_cfg, DRM_MODE_CONNECTOR_VIRTUAL);
+	vkms_config_connector_set_supported_colorspaces(connector_cfg, 0);
 	xa_init_flags(&connector_cfg->possible_encoders, XA_FLAGS_ALLOC);
 
 	list_add_tail(&connector_cfg->link, &config->connectors);
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index 36d289a010f6..ec614c2d4a30 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -141,6 +141,7 @@ struct vkms_config_connector {
 
 	int type;
 	enum drm_connector_status status;
+	u32 supported_colorspaces;
 	struct xarray possible_encoders;
 
 	/* Internal usage */
@@ -239,6 +240,31 @@ struct vkms_config *vkms_config_default_create(bool enable_cursor,
  */
 void vkms_config_destroy(struct vkms_config *config);
 
+/**
+ * vkms_config_connector_set_supported_colorspaces() - Set the supported colorspaces for a connector
+ * @connector_cfg: Connector configuration to modify
+ * @supported_colorspaces: Bitmask of supported colorspaces (DRM_COLOR_YCBCR_*)
+ */
+static inline void
+vkms_config_connector_set_supported_colorspaces(struct vkms_config_connector *connector_cfg,
+						u32 supported_colorspaces)
+{
+	connector_cfg->supported_colorspaces = supported_colorspaces;
+}
+
+/**
+ * vkms_config_connector_get_supported_colorspaces() - Get the supported colorspaces for a connector
+ * @connector_cfg: Connector configuration to query
+ *
+ * Returns:
+ * Bitmask of supported colorspaces (DRM_COLOR_YCBCR_*)
+ */
+static inline u32
+vkms_config_connector_get_supported_colorspaces(struct vkms_config_connector *connector_cfg)
+{
+	return connector_cfg->supported_colorspaces;
+}
+
 /**
  * vkms_config_get_device_name() - Return the name of the device
  * @config: Configuration to get the device name from
diff --git a/drivers/gpu/drm/vkms/vkms_connector.c b/drivers/gpu/drm/vkms/vkms_connector.c
index 5a87dc2d4c63..cc59d13c2d22 100644
--- a/drivers/gpu/drm/vkms/vkms_connector.c
+++ b/drivers/gpu/drm/vkms/vkms_connector.c
@@ -84,6 +84,21 @@ struct vkms_connector *vkms_connector_init(struct vkms_device *vkmsdev,
 	if (ret)
 		return ERR_PTR(ret);
 
+	if (vkms_config_connector_get_supported_colorspaces(connector_cfg)) {
+		if (connector_cfg->type == DRM_MODE_CONNECTOR_HDMIA) {
+			drm_mode_create_hdmi_colorspace_property(&connector->base,
+								 vkms_config_connector_get_supported_colorspaces(connector_cfg));
+			drm_connector_attach_hdr_output_metadata_property(&connector->base);
+			drm_connector_attach_colorspace_property(&connector->base);
+		} else if (connector_cfg->type == DRM_MODE_CONNECTOR_DisplayPort ||
+			   connector_cfg->type == DRM_MODE_CONNECTOR_eDP) {
+			drm_mode_create_dp_colorspace_property(&connector->base,
+							       vkms_config_connector_get_supported_colorspaces(connector_cfg));
+			drm_connector_attach_hdr_output_metadata_property(&connector->base);
+			drm_connector_attach_colorspace_property(&connector->base);
+		}
+	}
+
 	drm_connector_helper_add(&connector->base, &vkms_conn_helper_funcs);
 
 	return connector;

-- 
2.51.0