This patchset adds:
- (Generic) integrated privacy screen support in drm
- Ability in i915 to attach to ACPI nodes
- an implmentation for ACPI privacy screen in i915
Rajat Jain (4):
intel_acpi: Rename drm_dev local variable to dev
drm/connector: Add support for privacy-screen property
drm/i915: Lookup and attach ACPI device node for connectors
drm/i915: Add support for integrated privacy screen
drivers/gpu/drm/drm_atomic_uapi.c | 4 +
drivers/gpu/drm/drm_connector.c | 56 ++++++
drivers/gpu/drm/i915/Makefile | 3 +-
drivers/gpu/drm/i915/display/intel_acpi.c | 28 ++-
drivers/gpu/drm/i915/display/intel_atomic.c | 1 +
.../drm/i915/display/intel_display_types.h | 5 +
drivers/gpu/drm/i915/display/intel_dp.c | 43 ++++-
.../drm/i915/display/intel_privacy_screen.c | 175 ++++++++++++++++++
.../drm/i915/display/intel_privacy_screen.h | 27 +++
drivers/gpu/drm/i915/i915_drv.h | 2 +
include/drm/drm_connector.h | 25 +++
11 files changed, 365 insertions(+), 4 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.c
create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.h
--
2.25.1.481.gfbce0eb801-goog
Change the struct drm_device * local variable from drm_dev to dev
per the feedback received here:
https://lkml.org/lkml/2020/1/24/1143
Signed-off-by: Rajat Jain <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
---
v7: same as v6
v6: Initial patch (v6 to match other patches in the set)
drivers/gpu/drm/i915/display/intel_acpi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c
index e21fb14d5e07b..3e6831cca4ac1 100644
--- a/drivers/gpu/drm/i915/display/intel_acpi.c
+++ b/drivers/gpu/drm/i915/display/intel_acpi.c
@@ -224,13 +224,13 @@ static u32 acpi_display_type(struct intel_connector *connector)
void intel_acpi_device_id_update(struct drm_i915_private *dev_priv)
{
- struct drm_device *drm_dev = &dev_priv->drm;
+ struct drm_device *dev = &dev_priv->drm;
struct intel_connector *connector;
struct drm_connector_list_iter conn_iter;
u8 display_index[16] = {};
/* Populate the ACPI IDs for all connectors for a given drm_device */
- drm_connector_list_iter_begin(drm_dev, &conn_iter);
+ drm_connector_list_iter_begin(dev, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter) {
u32 device_id, type;
--
2.25.1.481.gfbce0eb801-goog
Add support for an ACPI based integrated privacy screen that is
available on some systems.
Signed-off-by: Rajat Jain <[email protected]>
---
v7: * Move the privacy-screen property back into drm core.
* Do the actual HW EPS toggling at commit time.
* Provide a sample ACPI node for reference in comments.
v6: Always initialize prop in intel_attach_privacy_screen_property()
v5: fix a cosmetic checkpatch warning
v4: Fix a typo in intel_privacy_screen.h
v3: * Change license to GPL-2.0 OR MIT
* Move privacy screen enum from UAPI to intel_display_types.h
* Rename parameter name and some other minor changes.
v2: Formed by splitting the original patch into multiple patches.
- All code has been moved into i915 now.
- Privacy screen is a i915 property
- Have a local state variable to store the prvacy screen. Don't read
it from hardware.
drivers/gpu/drm/i915/Makefile | 3 +-
drivers/gpu/drm/i915/display/intel_atomic.c | 1 +
drivers/gpu/drm/i915/display/intel_dp.c | 30 ++-
.../drm/i915/display/intel_privacy_screen.c | 175 ++++++++++++++++++
.../drm/i915/display/intel_privacy_screen.h | 27 +++
5 files changed, 234 insertions(+), 2 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.c
create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 9f887a86e555d..da42389107f9c 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -209,7 +209,8 @@ i915-y += \
display/intel_vga.o
i915-$(CONFIG_ACPI) += \
display/intel_acpi.o \
- display/intel_opregion.o
+ display/intel_opregion.o \
+ display/intel_privacy_screen.o
i915-$(CONFIG_DRM_FBDEV_EMULATION) += \
display/intel_fbdev.o
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index d043057d2fa03..fc6264b4a7f73 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -150,6 +150,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
new_conn_state->base.content_type != old_conn_state->base.content_type ||
new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
+ new_conn_state->base.privacy_screen_status != old_conn_state->base.privacy_screen_status ||
!blob_equal(new_conn_state->base.hdr_output_metadata,
old_conn_state->base.hdr_output_metadata))
crtc_state->mode_changed = true;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 41c623b029464..a39b0c420b50a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -62,6 +62,7 @@
#include "intel_lspcon.h"
#include "intel_lvds.h"
#include "intel_panel.h"
+#include "intel_privacy_screen.h"
#include "intel_psr.h"
#include "intel_sideband.h"
#include "intel_tc.h"
@@ -5886,6 +5887,12 @@ intel_dp_connector_register(struct drm_connector *connector)
dev_priv->acpi_scan_done = true;
}
+ /* Check for integrated Privacy screen support */
+ if (intel_privacy_screen_present(to_intel_connector(connector)))
+ drm_connector_attach_privacy_screen_property(connector);
+ else
+ drm_connector_destroy_privacy_screen_property(connector);
+
DRM_DEBUG_KMS("registering %s bus for %s\n",
intel_dp->aux.name, connector->kdev->kobj.name);
@@ -6881,9 +6888,30 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
drm_connector_attach_scaling_mode_property(connector, allowed_scalers);
connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
+
+ drm_connector_create_privacy_screen_property(connector);
}
}
+static void intel_dp_update_privacy_screen(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state,
+ const struct drm_connector_state *conn_state)
+{
+ struct drm_connector *connector = conn_state->connector;
+
+ if (connector->privacy_screen_property)
+ intel_privacy_screen_set_val(to_intel_connector(connector),
+ conn_state->privacy_screen_status);
+}
+
+static void intel_dp_update_pipe(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state,
+ const struct drm_connector_state *conn_state)
+{
+ intel_dp_update_privacy_screen(encoder, crtc_state, conn_state);
+ intel_panel_update_backlight(encoder, crtc_state, conn_state);
+}
+
static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
{
intel_dp->panel_power_off_time = ktime_get_boottime();
@@ -7825,7 +7853,7 @@ bool intel_dp_init(struct drm_i915_private *dev_priv,
intel_encoder->compute_config = intel_dp_compute_config;
intel_encoder->get_hw_state = intel_dp_get_hw_state;
intel_encoder->get_config = intel_dp_get_config;
- intel_encoder->update_pipe = intel_panel_update_backlight;
+ intel_encoder->update_pipe = intel_dp_update_pipe;
intel_encoder->suspend = intel_dp_encoder_suspend;
if (IS_CHERRYVIEW(dev_priv)) {
intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.c b/drivers/gpu/drm/i915/display/intel_privacy_screen.c
new file mode 100644
index 0000000000000..6ff61ddf4c0a4
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Intel ACPI privacy screen code
+ *
+ * Copyright © 2020 Google Inc.
+ *
+ * This code can help detect and control an integrated EPS (electronic
+ * privacy screen) via ACPI functions. It expects an ACPI node for the
+ * drm connector device with the following elements:
+ *
+ * UUID should be "c7033113-8720-4ceb-9090-9d52b3e52d73"
+ *
+ * _ADR = ACPI address per Spec (also see intel_acpi_device_id_update())
+ * https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf
+ * Pages 1119 - 1123.
+ *
+ * _DSM method that will perform the following functions according to
+ * Local1 argument passed to it:
+ * - Local1 = 0 (EPS capabilities): Report EPS presence and capabilities.
+ * - Local1 = 1 (EPS State) : _DSM returns 1 if EPS is enabled, 0 otherwise.
+ * - Local1 = 2 (EPS Enable) : _DSM enables EPS
+ * - Local1 = 3 (EPS Disable): _DSM disables EPS
+ *
+ * Here is a sample ACPI node:
+ *
+ * Scope (\_SB.PCI0.GFX0) // Intel graphics device (PCI device)
+ * {
+ * Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
+ * {
+ * Return (Package (0x01)
+ * {
+ * 0x80010400
+ * })
+ * }
+ *
+ * Device (LCD)
+ * {
+ * Name (_ADR, 0x80010400) // _ADR: Address
+ * Name (_STA, 0x0F) // _STA: Status
+ *
+ * Method (EPSP, 0, NotSerialized) // EPS Present
+ * {
+ * Return (0x01)
+ * }
+ *
+ * Method (EPSS, 0, NotSerialized) // EPS State
+ * {
+ * Local0 = \_SB.PCI0.GRXS (0xCD)
+ * Return (Local0)
+ * }
+ *
+ * Method (EPSE, 0, NotSerialized) // EPS Enable
+ * {
+ * \_SB.PCI0.STXS (0xCD)
+ * }
+ *
+ * Method (EPSD, 0, NotSerialized) // EPS Disable
+ * {
+ * \_SB.PCI0.CTXS (0xCD)
+ * }
+ *
+ * Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method
+ * {
+ * ToBuffer (Arg0, Local0)
+ * If ((Local0 == ToUUID ("c7033113-8720-4ceb-9090-9d52b3e52d73")))
+ * {
+ * ToInteger (Arg2, Local1)
+ * If ((Local1 == Zero))
+ * {
+ * Local2 = EPSP ()
+ * If ((Local2 == One))
+ * {
+ * Return (Buffer (One)
+ * {
+ * 0x0F
+ * })
+ * }
+ * }
+ *
+ * If ((Local1 == One))
+ * {
+ * Return (EPSS ())
+ * }
+ *
+ * If ((Local1 == 0x02))
+ * {
+ * EPSE ()
+ * }
+ *
+ * If ((Local1 == 0x03))
+ * {
+ * EPSD ()
+ * }
+ *
+ * Return (Buffer (One)
+ * {
+ * 0x00
+ * })
+ * }
+ *
+ * Return (Buffer (One)
+ * {
+ * 0x00
+ * })
+ * }
+ * }
+ * }
+ */
+
+#include <linux/acpi.h>
+
+#include "intel_privacy_screen.h"
+
+#define CONNECTOR_DSM_REVID 1
+
+#define CONNECTOR_DSM_FN_PRIVACY_ENABLE 2
+#define CONNECTOR_DSM_FN_PRIVACY_DISABLE 3
+
+static const guid_t drm_conn_dsm_guid =
+ GUID_INIT(0xC7033113, 0x8720, 0x4CEB,
+ 0x90, 0x90, 0x9D, 0x52, 0xB3, 0xE5, 0x2D, 0x73);
+
+/* Makes _DSM call to set privacy screen status */
+static void acpi_privacy_screen_call_dsm(struct intel_connector *connector,
+ u64 func)
+{
+ union acpi_object *obj;
+ acpi_handle acpi_handle = connector->acpi_handle;
+
+ if (!acpi_handle)
+ return;
+
+ obj = acpi_evaluate_dsm(acpi_handle, &drm_conn_dsm_guid,
+ CONNECTOR_DSM_REVID, func, NULL);
+ if (!obj) {
+ drm_err(connector->base.dev,
+ "failed to evaluate _DSM for fn %llx\n", func);
+ return;
+ }
+
+ ACPI_FREE(obj);
+}
+
+void intel_privacy_screen_set_val(struct intel_connector *connector,
+ enum drm_privacy_screen_status val)
+{
+ if (val == PRIVACY_SCREEN_DISABLED)
+ acpi_privacy_screen_call_dsm(connector,
+ CONNECTOR_DSM_FN_PRIVACY_DISABLE);
+ else if (val == PRIVACY_SCREEN_ENABLED)
+ acpi_privacy_screen_call_dsm(connector,
+ CONNECTOR_DSM_FN_PRIVACY_ENABLE);
+ else
+ drm_err(connector->base.dev,
+ "Cannot set privacy screen to invalid val %u\n", val);
+}
+
+bool intel_privacy_screen_present(struct intel_connector *connector)
+{
+ acpi_handle handle = connector->acpi_handle;
+
+ if (!handle)
+ return false;
+
+ if (!acpi_check_dsm(handle, &drm_conn_dsm_guid,
+ CONNECTOR_DSM_REVID,
+ 1 << CONNECTOR_DSM_FN_PRIVACY_ENABLE |
+ 1 << CONNECTOR_DSM_FN_PRIVACY_DISABLE)) {
+ drm_dbg_kms(connector->base.dev,
+ "ACPI node but no privacy scrn\n");
+ return false;
+ }
+ drm_info(connector->base.dev, "supports privacy screen\n");
+ return true;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.h b/drivers/gpu/drm/i915/display/intel_privacy_screen.h
new file mode 100644
index 0000000000000..f8d2e246ea0bd
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/*
+ * Copyright © 2019 Google Inc.
+ */
+
+#ifndef __DRM_PRIVACY_SCREEN_H__
+#define __DRM_PRIVACY_SCREEN_H__
+
+#include "intel_display_types.h"
+
+#ifdef CONFIG_ACPI
+bool intel_privacy_screen_present(struct intel_connector *connector);
+void intel_privacy_screen_set_val(struct intel_connector *connector,
+ enum drm_privacy_screen_status val);
+#else
+static bool intel_privacy_screen_present(struct intel_connector *connector)
+{
+ return false;
+}
+
+static void
+intel_privacy_screen_set_val(struct intel_connector *connector,
+ enum drm_privacy_screen_status val)
+{ }
+#endif /* CONFIG_ACPI */
+
+#endif /* __DRM_PRIVACY_SCREEN_H__ */
--
2.25.1.481.gfbce0eb801-goog
Lookup and attach ACPI nodes for intel connectors. The lookup is done
in compliance with ACPI Spec 6.3
https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf
(Ref: Pages 1119 - 1123).
This can be useful for any connector specific platform properties. (This
will be used for privacy screen in next patch).
Signed-off-by: Rajat Jain <[email protected]>
---
v7: Look for ACPI node in ->late_register() hook.
Do the scan only once per drm_device (instead of 1 per drm_connector)
v6: Addressed minor comments from Jani at
https://lkml.org/lkml/2020/1/24/1143
- local variable renamed.
- used drm_dbg_kms()
- used acpi_device_handle()
- Used opaque type acpi_handle instead of void*
v5: same as v4
v4: Same as v3
v3: fold the code into existing acpi_device_id_update() function
v2: formed by splitting the original patch into ACPI lookup, and privacy
screen property. Also move it into i915 now that I found existing code
in i915 that can be re-used.
drivers/gpu/drm/i915/display/intel_acpi.c | 24 +++++++++++++++++++
.../drm/i915/display/intel_display_types.h | 5 ++++
drivers/gpu/drm/i915/display/intel_dp.c | 15 +++++++++++-
drivers/gpu/drm/i915/i915_drv.h | 2 ++
4 files changed, 45 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c
index 3e6831cca4ac1..5679f6882922e 100644
--- a/drivers/gpu/drm/i915/display/intel_acpi.c
+++ b/drivers/gpu/drm/i915/display/intel_acpi.c
@@ -222,13 +222,26 @@ static u32 acpi_display_type(struct intel_connector *connector)
return display_type;
}
+/*
+ * Ref: ACPI Spec 6.3
+ * https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf
+ * Pages 1119 - 1123 describe, what I believe, a standard way of
+ * identifying / addressing "display panels" in the ACPI. It provides
+ * a way for the ACPI to define devices for the display panels attached
+ * to the system. It thus provides a way for the BIOS to export any panel
+ * specific properties to the system via ACPI (like device trees).
+ */
void intel_acpi_device_id_update(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
struct intel_connector *connector;
struct drm_connector_list_iter conn_iter;
+ struct acpi_device *conn_dev, *parent;
+ u64 conn_addr;
u8 display_index[16] = {};
+ parent = ACPI_COMPANION(&dev->pdev->dev);
+
/* Populate the ACPI IDs for all connectors for a given drm_device */
drm_connector_list_iter_begin(dev, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter) {
@@ -242,6 +255,17 @@ void intel_acpi_device_id_update(struct drm_i915_private *dev_priv)
device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
connector->acpi_device_id = device_id;
+
+ /* Build the _ADR to look for */
+ conn_addr = device_id | ACPI_DEVICE_ID_SCHEME |
+ ACPI_BIOS_CAN_DETECT;
+
+ drm_dbg_kms(dev, "Checking connector ACPI node at _ADR=%llX\n",
+ conn_addr);
+
+ /* Look up the connector device, under the PCI device */
+ conn_dev = acpi_find_child_device(parent, conn_addr, false);
+ connector->acpi_handle = acpi_device_handle(conn_dev);
}
drm_connector_list_iter_end(&conn_iter);
}
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 5e00e611f077f..d70612cc1ba2a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -411,9 +411,14 @@ struct intel_connector {
*/
struct intel_encoder *encoder;
+#ifdef CONFIG_ACPI
/* ACPI device id for ACPI and driver cooperation */
u32 acpi_device_id;
+ /* ACPI handle corresponding to this connector display, if found */
+ acpi_handle acpi_handle;
+#endif
+
/* Reads out the current hw, returning true if the connector is enabled
* and active (i.e. dpms ON state). */
bool (*get_hw_state)(struct intel_connector *);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 0a417cd2af2bc..41c623b029464 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -44,6 +44,7 @@
#include "i915_debugfs.h"
#include "i915_drv.h"
#include "i915_trace.h"
+#include "intel_acpi.h"
#include "intel_atomic.h"
#include "intel_audio.h"
#include "intel_connector.h"
@@ -5863,6 +5864,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
static int
intel_dp_connector_register(struct drm_connector *connector)
{
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
int ret;
@@ -5872,6 +5874,18 @@ intel_dp_connector_register(struct drm_connector *connector)
intel_connector_debugfs_add(connector);
+ /*
+ * Lookup the ACPI node corresponding to the connector. This needs
+ * to be done in ->late_register() hook since it needs to iterate
+ * over all the connectors after they are registered. Calling it
+ * once for the device is enough since a single call() will update
+ * for all connectors.
+ */
+ if (!dev_priv->acpi_scan_done) {
+ intel_acpi_device_id_update(dev_priv);
+ dev_priv->acpi_scan_done = true;
+ }
+
DRM_DEBUG_KMS("registering %s bus for %s\n",
intel_dp->aux.name, connector->kdev->kobj.name);
@@ -6867,7 +6881,6 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
drm_connector_attach_scaling_mode_property(connector, allowed_scalers);
connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
-
}
}
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 19195bde4921b..4e23d7a4a2129 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1189,6 +1189,8 @@ struct drm_i915_private {
bool ipc_enabled;
+ bool acpi_scan_done;
+
/* Used to save the pipe-to-encoder mapping for audio */
struct intel_encoder *av_enc_map[I915_MAX_PIPES];
--
2.25.1.481.gfbce0eb801-goog
Add support for generic electronic privacy screen property, that
can be added by systems that have an integrated EPS.
Signed-off-by: Rajat Jain <[email protected]>
---
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 | 56 +++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 25 ++++++++++++++
3 files changed, 85 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..39303e15063a9 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 +2141,58 @@ 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_init_privacy_screen_property -
+ * create and attach the drm connecter's privacy-screen property.
+ * @connector: connector for which to init the privacy-screen property
+ *
+ * This function creates and attaches the "privacy-screen" property to the
+ * connector. Initial state of privacy-screen is set to disabled.
+ */
+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);
+
+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);
+
+void
+drm_connector_destroy_privacy_screen_property(struct drm_connector *connector)
+{
+ struct drm_property *prop = connector->privacy_screen_property;
+
+ if (!prop)
+ return;
+
+ drm_property_destroy(connector->dev, prop);
+ connector->privacy_screen_property = NULL;
+}
+EXPORT_SYMBOL(drm_connector_destroy_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..257f398ce8720 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 +1583,9 @@ 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);
+void drm_connector_destroy_privacy_screen_property(struct drm_connector *conn);
/**
* struct drm_tile_group - Tile group metadata
--
2.25.1.481.gfbce0eb801-goog
Hi Jani,
I have 1 question / need 1 help about this patch:
On Mon, Mar 9, 2020 at 5:06 PM Rajat Jain <[email protected]> wrote:
>
> Add support for an ACPI based integrated privacy screen that is
> available on some systems.
>
> Signed-off-by: Rajat Jain <[email protected]>
> ---
> v7: * Move the privacy-screen property back into drm core.
> * Do the actual HW EPS toggling at commit time.
> * Provide a sample ACPI node for reference in comments.
> v6: Always initialize prop in intel_attach_privacy_screen_property()
> v5: fix a cosmetic checkpatch warning
> v4: Fix a typo in intel_privacy_screen.h
> v3: * Change license to GPL-2.0 OR MIT
> * Move privacy screen enum from UAPI to intel_display_types.h
> * Rename parameter name and some other minor changes.
> v2: Formed by splitting the original patch into multiple patches.
> - All code has been moved into i915 now.
> - Privacy screen is a i915 property
> - Have a local state variable to store the prvacy screen. Don't read
> it from hardware.
>
> drivers/gpu/drm/i915/Makefile | 3 +-
> drivers/gpu/drm/i915/display/intel_atomic.c | 1 +
> drivers/gpu/drm/i915/display/intel_dp.c | 30 ++-
> .../drm/i915/display/intel_privacy_screen.c | 175 ++++++++++++++++++
> .../drm/i915/display/intel_privacy_screen.h | 27 +++
> 5 files changed, 234 insertions(+), 2 deletions(-)
> create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.c
> create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.h
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 9f887a86e555d..da42389107f9c 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -209,7 +209,8 @@ i915-y += \
> display/intel_vga.o
> i915-$(CONFIG_ACPI) += \
> display/intel_acpi.o \
> - display/intel_opregion.o
> + display/intel_opregion.o \
> + display/intel_privacy_screen.o
> i915-$(CONFIG_DRM_FBDEV_EMULATION) += \
> display/intel_fbdev.o
>
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
> index d043057d2fa03..fc6264b4a7f73 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -150,6 +150,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
> new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
> new_conn_state->base.content_type != old_conn_state->base.content_type ||
> new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
> + new_conn_state->base.privacy_screen_status != old_conn_state->base.privacy_screen_status ||
> !blob_equal(new_conn_state->base.hdr_output_metadata,
> old_conn_state->base.hdr_output_metadata))
> crtc_state->mode_changed = true;
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 41c623b029464..a39b0c420b50a 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -62,6 +62,7 @@
> #include "intel_lspcon.h"
> #include "intel_lvds.h"
> #include "intel_panel.h"
> +#include "intel_privacy_screen.h"
> #include "intel_psr.h"
> #include "intel_sideband.h"
> #include "intel_tc.h"
> @@ -5886,6 +5887,12 @@ intel_dp_connector_register(struct drm_connector *connector)
> dev_priv->acpi_scan_done = true;
> }
>
> + /* Check for integrated Privacy screen support */
> + if (intel_privacy_screen_present(to_intel_connector(connector)))
> + drm_connector_attach_privacy_screen_property(connector);
> + else
> + drm_connector_destroy_privacy_screen_property(connector);
> +
> DRM_DEBUG_KMS("registering %s bus for %s\n",
> intel_dp->aux.name, connector->kdev->kobj.name);
>
> @@ -6881,9 +6888,30 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
> drm_connector_attach_scaling_mode_property(connector, allowed_scalers);
>
> connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
> +
> + drm_connector_create_privacy_screen_property(connector);
> }
> }
>
> +static void intel_dp_update_privacy_screen(struct intel_encoder *encoder,
> + const struct intel_crtc_state *crtc_state,
> + const struct drm_connector_state *conn_state)
> +{
> + struct drm_connector *connector = conn_state->connector;
> +
> + if (connector->privacy_screen_property)
> + intel_privacy_screen_set_val(to_intel_connector(connector),
> + conn_state->privacy_screen_status);
> +}
> +
> +static void intel_dp_update_pipe(struct intel_encoder *encoder,
> + const struct intel_crtc_state *crtc_state,
> + const struct drm_connector_state *conn_state)
> +{
> + intel_dp_update_privacy_screen(encoder, crtc_state, conn_state);
> + intel_panel_update_backlight(encoder, crtc_state, conn_state);
> +}
> +
> static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> {
> intel_dp->panel_power_off_time = ktime_get_boottime();
> @@ -7825,7 +7853,7 @@ bool intel_dp_init(struct drm_i915_private *dev_priv,
> intel_encoder->compute_config = intel_dp_compute_config;
> intel_encoder->get_hw_state = intel_dp_get_hw_state;
> intel_encoder->get_config = intel_dp_get_config;
> - intel_encoder->update_pipe = intel_panel_update_backlight;
> + intel_encoder->update_pipe = intel_dp_update_pipe;
For my testing purposes, I'm testing this using the proptest userspace utility
in our distribution (I think from
https://github.com/CPFL/drm/blob/master/tests/proptest/proptest.c). I
notice that when I change the value of the property from userspace,
even though the drm_connector_state->privacy_screen_status gets
updated and reflects the change, the encoder->update_pipe() is not
getting called. Just wanted to ask if this is expected since you seem
to have implied that this update_pipe() might *not* get called if there *is* a
full modeset? (What is the hook that gets called for a full modeset
where i915 driver should commit this property change to the hardware?)
Thanks a lot for all your help,
Best Regards,
Rajat
> intel_encoder->suspend = intel_dp_encoder_suspend;
> if (IS_CHERRYVIEW(dev_priv)) {
> intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
> diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.c b/drivers/gpu/drm/i915/display/intel_privacy_screen.c
> new file mode 100644
> index 0000000000000..6ff61ddf4c0a4
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.c
> @@ -0,0 +1,175 @@
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> +/*
> + * Intel ACPI privacy screen code
> + *
> + * Copyright © 2020 Google Inc.
> + *
> + * This code can help detect and control an integrated EPS (electronic
> + * privacy screen) via ACPI functions. It expects an ACPI node for the
> + * drm connector device with the following elements:
> + *
> + * UUID should be "c7033113-8720-4ceb-9090-9d52b3e52d73"
> + *
> + * _ADR = ACPI address per Spec (also see intel_acpi_device_id_update())
> + * https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf
> + * Pages 1119 - 1123.
> + *
> + * _DSM method that will perform the following functions according to
> + * Local1 argument passed to it:
> + * - Local1 = 0 (EPS capabilities): Report EPS presence and capabilities.
> + * - Local1 = 1 (EPS State) : _DSM returns 1 if EPS is enabled, 0 otherwise.
> + * - Local1 = 2 (EPS Enable) : _DSM enables EPS
> + * - Local1 = 3 (EPS Disable): _DSM disables EPS
> + *
> + * Here is a sample ACPI node:
> + *
> + * Scope (\_SB.PCI0.GFX0) // Intel graphics device (PCI device)
> + * {
> + * Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
> + * {
> + * Return (Package (0x01)
> + * {
> + * 0x80010400
> + * })
> + * }
> + *
> + * Device (LCD)
> + * {
> + * Name (_ADR, 0x80010400) // _ADR: Address
> + * Name (_STA, 0x0F) // _STA: Status
> + *
> + * Method (EPSP, 0, NotSerialized) // EPS Present
> + * {
> + * Return (0x01)
> + * }
> + *
> + * Method (EPSS, 0, NotSerialized) // EPS State
> + * {
> + * Local0 = \_SB.PCI0.GRXS (0xCD)
> + * Return (Local0)
> + * }
> + *
> + * Method (EPSE, 0, NotSerialized) // EPS Enable
> + * {
> + * \_SB.PCI0.STXS (0xCD)
> + * }
> + *
> + * Method (EPSD, 0, NotSerialized) // EPS Disable
> + * {
> + * \_SB.PCI0.CTXS (0xCD)
> + * }
> + *
> + * Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method
> + * {
> + * ToBuffer (Arg0, Local0)
> + * If ((Local0 == ToUUID ("c7033113-8720-4ceb-9090-9d52b3e52d73")))
> + * {
> + * ToInteger (Arg2, Local1)
> + * If ((Local1 == Zero))
> + * {
> + * Local2 = EPSP ()
> + * If ((Local2 == One))
> + * {
> + * Return (Buffer (One)
> + * {
> + * 0x0F
> + * })
> + * }
> + * }
> + *
> + * If ((Local1 == One))
> + * {
> + * Return (EPSS ())
> + * }
> + *
> + * If ((Local1 == 0x02))
> + * {
> + * EPSE ()
> + * }
> + *
> + * If ((Local1 == 0x03))
> + * {
> + * EPSD ()
> + * }
> + *
> + * Return (Buffer (One)
> + * {
> + * 0x00
> + * })
> + * }
> + *
> + * Return (Buffer (One)
> + * {
> + * 0x00
> + * })
> + * }
> + * }
> + * }
> + */
> +
> +#include <linux/acpi.h>
> +
> +#include "intel_privacy_screen.h"
> +
> +#define CONNECTOR_DSM_REVID 1
> +
> +#define CONNECTOR_DSM_FN_PRIVACY_ENABLE 2
> +#define CONNECTOR_DSM_FN_PRIVACY_DISABLE 3
> +
> +static const guid_t drm_conn_dsm_guid =
> + GUID_INIT(0xC7033113, 0x8720, 0x4CEB,
> + 0x90, 0x90, 0x9D, 0x52, 0xB3, 0xE5, 0x2D, 0x73);
> +
> +/* Makes _DSM call to set privacy screen status */
> +static void acpi_privacy_screen_call_dsm(struct intel_connector *connector,
> + u64 func)
> +{
> + union acpi_object *obj;
> + acpi_handle acpi_handle = connector->acpi_handle;
> +
> + if (!acpi_handle)
> + return;
> +
> + obj = acpi_evaluate_dsm(acpi_handle, &drm_conn_dsm_guid,
> + CONNECTOR_DSM_REVID, func, NULL);
> + if (!obj) {
> + drm_err(connector->base.dev,
> + "failed to evaluate _DSM for fn %llx\n", func);
> + return;
> + }
> +
> + ACPI_FREE(obj);
> +}
> +
> +void intel_privacy_screen_set_val(struct intel_connector *connector,
> + enum drm_privacy_screen_status val)
> +{
> + if (val == PRIVACY_SCREEN_DISABLED)
> + acpi_privacy_screen_call_dsm(connector,
> + CONNECTOR_DSM_FN_PRIVACY_DISABLE);
> + else if (val == PRIVACY_SCREEN_ENABLED)
> + acpi_privacy_screen_call_dsm(connector,
> + CONNECTOR_DSM_FN_PRIVACY_ENABLE);
> + else
> + drm_err(connector->base.dev,
> + "Cannot set privacy screen to invalid val %u\n", val);
> +}
> +
> +bool intel_privacy_screen_present(struct intel_connector *connector)
> +{
> + acpi_handle handle = connector->acpi_handle;
> +
> + if (!handle)
> + return false;
> +
> + if (!acpi_check_dsm(handle, &drm_conn_dsm_guid,
> + CONNECTOR_DSM_REVID,
> + 1 << CONNECTOR_DSM_FN_PRIVACY_ENABLE |
> + 1 << CONNECTOR_DSM_FN_PRIVACY_DISABLE)) {
> + drm_dbg_kms(connector->base.dev,
> + "ACPI node but no privacy scrn\n");
> + return false;
> + }
> + drm_info(connector->base.dev, "supports privacy screen\n");
> + return true;
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.h b/drivers/gpu/drm/i915/display/intel_privacy_screen.h
> new file mode 100644
> index 0000000000000..f8d2e246ea0bd
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.h
> @@ -0,0 +1,27 @@
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> +/*
> + * Copyright © 2019 Google Inc.
> + */
> +
> +#ifndef __DRM_PRIVACY_SCREEN_H__
> +#define __DRM_PRIVACY_SCREEN_H__
> +
> +#include "intel_display_types.h"
> +
> +#ifdef CONFIG_ACPI
> +bool intel_privacy_screen_present(struct intel_connector *connector);
> +void intel_privacy_screen_set_val(struct intel_connector *connector,
> + enum drm_privacy_screen_status val);
> +#else
> +static bool intel_privacy_screen_present(struct intel_connector *connector)
> +{
> + return false;
> +}
> +
> +static void
> +intel_privacy_screen_set_val(struct intel_connector *connector,
> + enum drm_privacy_screen_status val)
> +{ }
> +#endif /* CONFIG_ACPI */
> +
> +#endif /* __DRM_PRIVACY_SCREEN_H__ */
> --
> 2.25.1.481.gfbce0eb801-goog
>
Hi Jani,
On Mon, Mar 9, 2020 at 5:18 PM Rajat Jain <[email protected]> wrote:
>
> Hi Jani,
>
> I have 1 question / need 1 help about this patch:
Kind ignore, I found the answer, and posted my new patchset here:
https://patchwork.freedesktop.org/series/74607/
I got a "failed to apply" email from the patchwork. Can you please let
me know on which branch is it trying to apply it? I have currently
rebased my patchset to drm-intel-next-queued.
Thanks & Best Regards,
Rajat
>
> On Mon, Mar 9, 2020 at 5:06 PM Rajat Jain <[email protected]> wrote:
> >
> > Add support for an ACPI based integrated privacy screen that is
> > available on some systems.
> >
> > Signed-off-by: Rajat Jain <[email protected]>
> > ---
> > v7: * Move the privacy-screen property back into drm core.
> > * Do the actual HW EPS toggling at commit time.
> > * Provide a sample ACPI node for reference in comments.
> > v6: Always initialize prop in intel_attach_privacy_screen_property()
> > v5: fix a cosmetic checkpatch warning
> > v4: Fix a typo in intel_privacy_screen.h
> > v3: * Change license to GPL-2.0 OR MIT
> > * Move privacy screen enum from UAPI to intel_display_types.h
> > * Rename parameter name and some other minor changes.
> > v2: Formed by splitting the original patch into multiple patches.
> > - All code has been moved into i915 now.
> > - Privacy screen is a i915 property
> > - Have a local state variable to store the prvacy screen. Don't read
> > it from hardware.
> >
> > drivers/gpu/drm/i915/Makefile | 3 +-
> > drivers/gpu/drm/i915/display/intel_atomic.c | 1 +
> > drivers/gpu/drm/i915/display/intel_dp.c | 30 ++-
> > .../drm/i915/display/intel_privacy_screen.c | 175 ++++++++++++++++++
> > .../drm/i915/display/intel_privacy_screen.h | 27 +++
> > 5 files changed, 234 insertions(+), 2 deletions(-)
> > create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.c
> > create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.h
> >
> > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> > index 9f887a86e555d..da42389107f9c 100644
> > --- a/drivers/gpu/drm/i915/Makefile
> > +++ b/drivers/gpu/drm/i915/Makefile
> > @@ -209,7 +209,8 @@ i915-y += \
> > display/intel_vga.o
> > i915-$(CONFIG_ACPI) += \
> > display/intel_acpi.o \
> > - display/intel_opregion.o
> > + display/intel_opregion.o \
> > + display/intel_privacy_screen.o
> > i915-$(CONFIG_DRM_FBDEV_EMULATION) += \
> > display/intel_fbdev.o
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
> > index d043057d2fa03..fc6264b4a7f73 100644
> > --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> > +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> > @@ -150,6 +150,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
> > new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
> > new_conn_state->base.content_type != old_conn_state->base.content_type ||
> > new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
> > + new_conn_state->base.privacy_screen_status != old_conn_state->base.privacy_screen_status ||
> > !blob_equal(new_conn_state->base.hdr_output_metadata,
> > old_conn_state->base.hdr_output_metadata))
> > crtc_state->mode_changed = true;
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> > index 41c623b029464..a39b0c420b50a 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > @@ -62,6 +62,7 @@
> > #include "intel_lspcon.h"
> > #include "intel_lvds.h"
> > #include "intel_panel.h"
> > +#include "intel_privacy_screen.h"
> > #include "intel_psr.h"
> > #include "intel_sideband.h"
> > #include "intel_tc.h"
> > @@ -5886,6 +5887,12 @@ intel_dp_connector_register(struct drm_connector *connector)
> > dev_priv->acpi_scan_done = true;
> > }
> >
> > + /* Check for integrated Privacy screen support */
> > + if (intel_privacy_screen_present(to_intel_connector(connector)))
> > + drm_connector_attach_privacy_screen_property(connector);
> > + else
> > + drm_connector_destroy_privacy_screen_property(connector);
> > +
> > DRM_DEBUG_KMS("registering %s bus for %s\n",
> > intel_dp->aux.name, connector->kdev->kobj.name);
> >
> > @@ -6881,9 +6888,30 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
> > drm_connector_attach_scaling_mode_property(connector, allowed_scalers);
> >
> > connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
> > +
> > + drm_connector_create_privacy_screen_property(connector);
> > }
> > }
> >
> > +static void intel_dp_update_privacy_screen(struct intel_encoder *encoder,
> > + const struct intel_crtc_state *crtc_state,
> > + const struct drm_connector_state *conn_state)
> > +{
> > + struct drm_connector *connector = conn_state->connector;
> > +
> > + if (connector->privacy_screen_property)
> > + intel_privacy_screen_set_val(to_intel_connector(connector),
> > + conn_state->privacy_screen_status);
> > +}
> > +
> > +static void intel_dp_update_pipe(struct intel_encoder *encoder,
> > + const struct intel_crtc_state *crtc_state,
> > + const struct drm_connector_state *conn_state)
> > +{
> > + intel_dp_update_privacy_screen(encoder, crtc_state, conn_state);
> > + intel_panel_update_backlight(encoder, crtc_state, conn_state);
> > +}
> > +
> > static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> > {
> > intel_dp->panel_power_off_time = ktime_get_boottime();
> > @@ -7825,7 +7853,7 @@ bool intel_dp_init(struct drm_i915_private *dev_priv,
> > intel_encoder->compute_config = intel_dp_compute_config;
> > intel_encoder->get_hw_state = intel_dp_get_hw_state;
> > intel_encoder->get_config = intel_dp_get_config;
> > - intel_encoder->update_pipe = intel_panel_update_backlight;
> > + intel_encoder->update_pipe = intel_dp_update_pipe;
>
> For my testing purposes, I'm testing this using the proptest userspace utility
> in our distribution (I think from
> https://github.com/CPFL/drm/blob/master/tests/proptest/proptest.c). I
> notice that when I change the value of the property from userspace,
> even though the drm_connector_state->privacy_screen_status gets
> updated and reflects the change, the encoder->update_pipe() is not
> getting called. Just wanted to ask if this is expected since you seem
> to have implied that this update_pipe() might *not* get called if there *is* a
> full modeset? (What is the hook that gets called for a full modeset
> where i915 driver should commit this property change to the hardware?)
>
> Thanks a lot for all your help,
>
> Best Regards,
>
> Rajat
>
> > intel_encoder->suspend = intel_dp_encoder_suspend;
> > if (IS_CHERRYVIEW(dev_priv)) {
> > intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
> > diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.c b/drivers/gpu/drm/i915/display/intel_privacy_screen.c
> > new file mode 100644
> > index 0000000000000..6ff61ddf4c0a4
> > --- /dev/null
> > +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.c
> > @@ -0,0 +1,175 @@
> > +// SPDX-License-Identifier: GPL-2.0 OR MIT
> > +/*
> > + * Intel ACPI privacy screen code
> > + *
> > + * Copyright © 2020 Google Inc.
> > + *
> > + * This code can help detect and control an integrated EPS (electronic
> > + * privacy screen) via ACPI functions. It expects an ACPI node for the
> > + * drm connector device with the following elements:
> > + *
> > + * UUID should be "c7033113-8720-4ceb-9090-9d52b3e52d73"
> > + *
> > + * _ADR = ACPI address per Spec (also see intel_acpi_device_id_update())
> > + * https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf
> > + * Pages 1119 - 1123.
> > + *
> > + * _DSM method that will perform the following functions according to
> > + * Local1 argument passed to it:
> > + * - Local1 = 0 (EPS capabilities): Report EPS presence and capabilities.
> > + * - Local1 = 1 (EPS State) : _DSM returns 1 if EPS is enabled, 0 otherwise.
> > + * - Local1 = 2 (EPS Enable) : _DSM enables EPS
> > + * - Local1 = 3 (EPS Disable): _DSM disables EPS
> > + *
> > + * Here is a sample ACPI node:
> > + *
> > + * Scope (\_SB.PCI0.GFX0) // Intel graphics device (PCI device)
> > + * {
> > + * Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
> > + * {
> > + * Return (Package (0x01)
> > + * {
> > + * 0x80010400
> > + * })
> > + * }
> > + *
> > + * Device (LCD)
> > + * {
> > + * Name (_ADR, 0x80010400) // _ADR: Address
> > + * Name (_STA, 0x0F) // _STA: Status
> > + *
> > + * Method (EPSP, 0, NotSerialized) // EPS Present
> > + * {
> > + * Return (0x01)
> > + * }
> > + *
> > + * Method (EPSS, 0, NotSerialized) // EPS State
> > + * {
> > + * Local0 = \_SB.PCI0.GRXS (0xCD)
> > + * Return (Local0)
> > + * }
> > + *
> > + * Method (EPSE, 0, NotSerialized) // EPS Enable
> > + * {
> > + * \_SB.PCI0.STXS (0xCD)
> > + * }
> > + *
> > + * Method (EPSD, 0, NotSerialized) // EPS Disable
> > + * {
> > + * \_SB.PCI0.CTXS (0xCD)
> > + * }
> > + *
> > + * Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method
> > + * {
> > + * ToBuffer (Arg0, Local0)
> > + * If ((Local0 == ToUUID ("c7033113-8720-4ceb-9090-9d52b3e52d73")))
> > + * {
> > + * ToInteger (Arg2, Local1)
> > + * If ((Local1 == Zero))
> > + * {
> > + * Local2 = EPSP ()
> > + * If ((Local2 == One))
> > + * {
> > + * Return (Buffer (One)
> > + * {
> > + * 0x0F
> > + * })
> > + * }
> > + * }
> > + *
> > + * If ((Local1 == One))
> > + * {
> > + * Return (EPSS ())
> > + * }
> > + *
> > + * If ((Local1 == 0x02))
> > + * {
> > + * EPSE ()
> > + * }
> > + *
> > + * If ((Local1 == 0x03))
> > + * {
> > + * EPSD ()
> > + * }
> > + *
> > + * Return (Buffer (One)
> > + * {
> > + * 0x00
> > + * })
> > + * }
> > + *
> > + * Return (Buffer (One)
> > + * {
> > + * 0x00
> > + * })
> > + * }
> > + * }
> > + * }
> > + */
> > +
> > +#include <linux/acpi.h>
> > +
> > +#include "intel_privacy_screen.h"
> > +
> > +#define CONNECTOR_DSM_REVID 1
> > +
> > +#define CONNECTOR_DSM_FN_PRIVACY_ENABLE 2
> > +#define CONNECTOR_DSM_FN_PRIVACY_DISABLE 3
> > +
> > +static const guid_t drm_conn_dsm_guid =
> > + GUID_INIT(0xC7033113, 0x8720, 0x4CEB,
> > + 0x90, 0x90, 0x9D, 0x52, 0xB3, 0xE5, 0x2D, 0x73);
> > +
> > +/* Makes _DSM call to set privacy screen status */
> > +static void acpi_privacy_screen_call_dsm(struct intel_connector *connector,
> > + u64 func)
> > +{
> > + union acpi_object *obj;
> > + acpi_handle acpi_handle = connector->acpi_handle;
> > +
> > + if (!acpi_handle)
> > + return;
> > +
> > + obj = acpi_evaluate_dsm(acpi_handle, &drm_conn_dsm_guid,
> > + CONNECTOR_DSM_REVID, func, NULL);
> > + if (!obj) {
> > + drm_err(connector->base.dev,
> > + "failed to evaluate _DSM for fn %llx\n", func);
> > + return;
> > + }
> > +
> > + ACPI_FREE(obj);
> > +}
> > +
> > +void intel_privacy_screen_set_val(struct intel_connector *connector,
> > + enum drm_privacy_screen_status val)
> > +{
> > + if (val == PRIVACY_SCREEN_DISABLED)
> > + acpi_privacy_screen_call_dsm(connector,
> > + CONNECTOR_DSM_FN_PRIVACY_DISABLE);
> > + else if (val == PRIVACY_SCREEN_ENABLED)
> > + acpi_privacy_screen_call_dsm(connector,
> > + CONNECTOR_DSM_FN_PRIVACY_ENABLE);
> > + else
> > + drm_err(connector->base.dev,
> > + "Cannot set privacy screen to invalid val %u\n", val);
> > +}
> > +
> > +bool intel_privacy_screen_present(struct intel_connector *connector)
> > +{
> > + acpi_handle handle = connector->acpi_handle;
> > +
> > + if (!handle)
> > + return false;
> > +
> > + if (!acpi_check_dsm(handle, &drm_conn_dsm_guid,
> > + CONNECTOR_DSM_REVID,
> > + 1 << CONNECTOR_DSM_FN_PRIVACY_ENABLE |
> > + 1 << CONNECTOR_DSM_FN_PRIVACY_DISABLE)) {
> > + drm_dbg_kms(connector->base.dev,
> > + "ACPI node but no privacy scrn\n");
> > + return false;
> > + }
> > + drm_info(connector->base.dev, "supports privacy screen\n");
> > + return true;
> > +}
> > diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.h b/drivers/gpu/drm/i915/display/intel_privacy_screen.h
> > new file mode 100644
> > index 0000000000000..f8d2e246ea0bd
> > --- /dev/null
> > +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.h
> > @@ -0,0 +1,27 @@
> > +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> > +/*
> > + * Copyright © 2019 Google Inc.
> > + */
> > +
> > +#ifndef __DRM_PRIVACY_SCREEN_H__
> > +#define __DRM_PRIVACY_SCREEN_H__
> > +
> > +#include "intel_display_types.h"
> > +
> > +#ifdef CONFIG_ACPI
> > +bool intel_privacy_screen_present(struct intel_connector *connector);
> > +void intel_privacy_screen_set_val(struct intel_connector *connector,
> > + enum drm_privacy_screen_status val);
> > +#else
> > +static bool intel_privacy_screen_present(struct intel_connector *connector)
> > +{
> > + return false;
> > +}
> > +
> > +static void
> > +intel_privacy_screen_set_val(struct intel_connector *connector,
> > + enum drm_privacy_screen_status val)
> > +{ }
> > +#endif /* CONFIG_ACPI */
> > +
> > +#endif /* __DRM_PRIVACY_SCREEN_H__ */
> > --
> > 2.25.1.481.gfbce0eb801-goog
> >
On Wed, 11 Mar 2020, Rajat Jain <[email protected]> wrote:
> I got a "failed to apply" email from the patchwork. Can you please let
> me know on which branch is it trying to apply it? I have currently
> rebased my patchset to drm-intel-next-queued.
drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip
It's kind of like linux-next of drm.
BR,
Jani.
--
Jani Nikula, Intel Open Source Graphics Center
On Thu, Mar 12, 2020 at 4:24 AM Jani Nikula <[email protected]> wrote:
>
> On Wed, 11 Mar 2020, Rajat Jain <[email protected]> wrote:
> > I got a "failed to apply" email from the patchwork. Can you please let
> > me know on which branch is it trying to apply it? I have currently
> > rebased my patchset to drm-intel-next-queued.
>
> drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip
>
> It's kind of like linux-next of drm.
>
Hi Jani,
Haven't heard any comments in a while, so just checking to see if you
got a chance to look at my last patchset. It is here:
https://patchwork.freedesktop.org/patch/357452/
Thanks & Best Regards,
Rajat Jain
> BR,
> Jani.
>
>
> --
> Jani Nikula, Intel Open Source Graphics Center