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Message-Id: <20200312005722.48803-3-rajatja@google.com>
Date: Wed, 11 Mar 2020 17:57:19 -0700
From: Rajat Jain <rajatja@...gle.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
"Ville Syrjälä"
<ville.syrjala@...ux.intel.com>,
Chris Wilson <chris@...is-wilson.co.uk>,
Imre Deak <imre.deak@...el.com>,
"José Roberto de Souza" <jose.souza@...el.com>,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, gregkh@...uxfoundation.org,
mathewk@...gle.com, Daniel Thompson <daniel.thompson@...aro.org>,
Jonathan Corbet <corbet@....net>, Pavel Machek <pavel@...x.de>,
seanpaul@...gle.com, Duncan Laurie <dlaurie@...gle.com>,
jsbarnes@...gle.com, Thierry Reding <thierry.reding@...il.com>,
mpearson@...ovo.com, Nitin Joshi1 <njoshi1@...ovo.com>,
Sugumaran Lacshiminarayanan <slacshiminar@...ovo.com>,
Tomoki Maruichi <maruichit@...ovo.com>
Cc: Rajat Jain <rajatja@...gle.com>, rajatxjain@...il.com
Subject: [PATCH v8 2/5] drm/connector: Add support for privacy-screen property
Add support for generic electronic privacy screen property, that
can be added by systems that have an integrated EPS.
Signed-off-by: Rajat Jain <rajatja@...gle.com>
---
v8: Remove the ...destroy_privacy_screen() method and let the property
be destroyed along with others at the time of device destruction.
(because drm core doesn't also like properties destroyed in
late_register()).
v7: * Initial version, formed by moving the privacy-screen property into
drm core.
* Break the init_property() into create_property() and attach_property()
so that property can be created while registering connector, but
attached in late_register() (after ACPI node detection).
drivers/gpu/drm/drm_atomic_uapi.c | 4 +++
drivers/gpu/drm/drm_connector.c | 51 +++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 24 +++++++++++++++
3 files changed, 79 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index a1e5e262bae2d..843a8cdacd149 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -766,6 +766,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
fence_ptr);
} else if (property == connector->max_bpc_property) {
state->max_requested_bpc = val;
+ } else if (property == connector->privacy_screen_property) {
+ state->privacy_screen_status = val;
} else if (connector->funcs->atomic_set_property) {
return connector->funcs->atomic_set_property(connector,
state, property, val);
@@ -842,6 +844,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector,
*val = 0;
} else if (property == connector->max_bpc_property) {
*val = state->max_requested_bpc;
+ } else if (property == connector->privacy_screen_property) {
+ *val = state->privacy_screen_status;
} else if (connector->funcs->atomic_get_property) {
return connector->funcs->atomic_get_property(connector,
state, property, val);
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index f632ca05960e7..9a127f67fc59b 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1171,6 +1171,10 @@ static const struct drm_prop_enum_list dp_colorspaces[] = {
* can also expose this property to external outputs, in which case they
* must support "None", which should be the default (since external screens
* have a built-in scaler).
+ *
+ * privacy-screen:
+ * This optional property can be used to enable / disable an integrated
+ * electronic privacy screen that is available on some displays.
*/
int drm_connector_create_standard_properties(struct drm_device *dev)
@@ -2137,6 +2141,53 @@ int drm_connector_set_panel_orientation_with_quirk(
}
EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk);
+static const struct drm_prop_enum_list privacy_screen_enum[] = {
+ { PRIVACY_SCREEN_DISABLED, "Disabled" },
+ { PRIVACY_SCREEN_ENABLED, "Enabled" },
+};
+
+/**
+ * drm_connector_create_privacy_screen_property -
+ * create the drm connecter's privacy-screen property.
+ * @connector: connector for which to create the privacy-screen property
+ *
+ * This function creates the "privacy-screen" property for the
+ * connector. It is not attached.
+ */
+void
+drm_connector_create_privacy_screen_property(struct drm_connector *connector)
+{
+ if (connector->privacy_screen_property)
+ return;
+
+ connector->privacy_screen_property =
+ drm_property_create_enum(connector->dev, DRM_MODE_PROP_ENUM,
+ "privacy-screen", privacy_screen_enum,
+ ARRAY_SIZE(privacy_screen_enum));
+}
+EXPORT_SYMBOL(drm_connector_create_privacy_screen_property);
+
+/**
+ * drm_connector_attach_privacy_screen_property -
+ * attach the drm connecter's privacy-screen property.
+ * @connector: connector on which to attach the privacy-screen property
+ *
+ * This function attaches the "privacy-screen" property to the
+ * connector. Initial state of privacy-screen is set to disabled.
+ */
+void
+drm_connector_attach_privacy_screen_property(struct drm_connector *connector)
+{
+ struct drm_property *prop = connector->privacy_screen_property;
+
+ if (!prop)
+ return;
+
+ drm_object_attach_property(&connector->base, prop,
+ PRIVACY_SCREEN_DISABLED);
+}
+EXPORT_SYMBOL(drm_connector_attach_privacy_screen_property);
+
int drm_connector_set_obj_prop(struct drm_mode_object *obj,
struct drm_property *property,
uint64_t value)
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 2113500b4075d..f1a42987c5693 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -254,6 +254,20 @@ enum drm_panel_orientation {
DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
};
+/**
+ * enum drm_privacy_screen_status - privacy screen status
+ *
+ * This enum is used to track and control the state of the integrated privacy
+ * screen present on some display panels, via the "privacy-screen" property.
+ *
+ * @PRIVACY_SCREEN_DISABLED: The privacy-screen on the panel is disabled
+ * @PRIVACY_SCREEN_ENABLED: The privacy-screen on the panel is enabled
+ **/
+enum drm_privacy_screen_status {
+ PRIVACY_SCREEN_DISABLED = 0,
+ PRIVACY_SCREEN_ENABLED = 1,
+};
+
/*
* This is a consolidated colorimetry list supported by HDMI and
* DP protocol standard. The respective connectors will register
@@ -656,6 +670,8 @@ struct drm_connector_state {
*/
u8 max_bpc;
+ enum drm_privacy_screen_status privacy_screen_status;
+
/**
* @hdr_output_metadata:
* DRM blob property for HDR output metadata
@@ -1255,6 +1271,12 @@ struct drm_connector {
*/
struct drm_property *max_bpc_property;
+ /**
+ * @privacy_screen_property: Optional property for the connector to
+ * control the integrated privacy screen, if available.
+ */
+ struct drm_property *privacy_screen_property;
+
#define DRM_CONNECTOR_POLL_HPD (1 << 0)
#define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
#define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
@@ -1561,6 +1583,8 @@ int drm_connector_set_panel_orientation_with_quirk(
int width, int height);
int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
int min, int max);
+void drm_connector_create_privacy_screen_property(struct drm_connector *conn);
+void drm_connector_attach_privacy_screen_property(struct drm_connector *conn);
/**
* struct drm_tile_group - Tile group metadata
--
2.25.1.481.gfbce0eb801-goog
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