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Message-Id: <20251029-vkms-all-config-v2-24-be20b9bf146e@bootlin.com>
Date: Wed, 29 Oct 2025 14:30:34 +0100
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 v2 24/32] 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 | 5 +++++
drivers/gpu/drm/vkms/vkms_config.h | 30 +++++++++++++++++++++++++++
drivers/gpu/drm/vkms/vkms_connector.c | 15 ++++++++++++++
4 files changed, 53 insertions(+)
diff --git a/drivers/gpu/drm/vkms/tests/vkms_config_test.c b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
index c8b885306eed..e0ceecf2e2dd 100644
--- a/drivers/gpu/drm/vkms/tests/vkms_config_test.c
+++ b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
@@ -202,6 +202,9 @@ 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 02e2f0249fb0..6f939b82c33f 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -590,6 +590,10 @@ static int vkms_config_show(struct seq_file *m, void *data)
drm_get_connector_status_name(vkms_config_connector_get_status(connector_cfg)));
seq_printf(m, "\ttype=%s\n",
drm_get_connector_type_name(vkms_config_connector_get_type(connector_cfg)));
+ seq_puts(m, "\tsupported colorspaces=");
+ show_bitfield(m, vkms_config_connector_get_supported_colorspaces(connector_cfg),
+ drm_get_colorspace_name);
+ seq_puts(m, "\n");
}
return 0;
@@ -896,6 +900,7 @@ 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 6a50ec7535af..d68133723444 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -131,6 +131,10 @@ struct vkms_config_encoder {
* @type: Store the type of connector using DRM_MODE_CONNECTOR_* values
* @config: The vkms_config this connector belongs to
* @status: Status (connected, disconnected...) of the connector
+ * @supported_colorspaces: Bitmask of all the supported colorspaces. Values
+ * are the sames as ones accepted by
+ * drm_mode_create_hdmi_colorspace_property() and
+ * drm_mode_create_dp_colorspace_property()
* @possible_encoders: Array of encoders that can be used with this connector
* @connector: Internal usage. This pointer should never be considered as valid.
* It can be used to store a temporary reference to a VKMS connector
@@ -143,6 +147,7 @@ struct vkms_config_connector {
int type;
enum drm_connector_status status;
+ u32 supported_colorspaces;
struct xarray possible_encoders;
/* Internal usage */
@@ -241,6 +246,31 @@ 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(const 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
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