Merge tag 'drm-next-2022-03-24' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "Lots of work all over, Intel improving DG2 support, amdkfd CRIU
  support, msm new hw support, and faster fbdev support.

  dma-buf:
   - rename dma-buf-map to iosys-map

  core:
   - move buddy allocator to core
   - add pci/platform init macros
   - improve EDID parser deep color handling
   - EDID timing type 7 support
   - add GPD Win Max quirk
   - add yes/no helpers to string_helpers
   - flatten syncobj chains
   - add nomodeset support to lots of drivers
   - improve fb-helper clipping support
   - add default property value interface

  fbdev:
   - improve fbdev ops speed

  ttm:
   - add a backpointer from ttm bo->ttm resource

  dp:
   - move displayport headers
   - add a dp helper module

  bridge:
   - anx7625 atomic support, HDCP support

  panel:
   - split out panel-lvds and lvds bindings
   - find panels in OF subnodes

  privacy:
   - add chromeos privacy screen support

  fb:
   - hot unplug fw fb on forced removal

  simpledrm:
   - request region instead of marking ioresource busy
   - add panel oreintation property

  udmabuf:
   - fix oops with 0 pages

  amdgpu:
   - power management code cleanup
   - Enable freesync video mode by default
   - RAS code cleanup
   - Improve VRAM access for debug using SDMA
   - SR-IOV rework special register access and fixes
   - profiling power state request ioctl
   - expose IP discovery via sysfs
   - Cyan skillfish updates
   - GC 10.3.7, SDMA 5.2.7, DCN 3.1.6 updates
   - expose benchmark tests via debugfs
   - add module param to disable XGMI for testing
   - GPU reset debugfs register dumping support

  amdkfd:
   - CRIU support
   - SDMA queue fixes

  radeon:
   - UVD suspend fix
   - iMac backlight fix

  i915:
   - minimal parallel submission for execlists
   - DG2-G12 subplatform added
   - DG2 programming workarounds
   - DG2 accelerated migration support
   - flat CCS and CCS engine support for XeHP
   - initial small BAR support
   - drop fake LMEM support
   - ADL-N PCH support
   - bigjoiner updates
   - introduce VMA resources and async unbinding
   - register definitions cleanups
   - multi-FBC refactoring
   - DG1 OPROM over SPI support
   - ADL-N platform enabling
   - opregion mailbox #5 support
   - DP MST ESI improvements
   - drm device based logging
   - async flip optimisation for DG2
   - CPU arch abstraction fixes
   - improve GuC ADS init to work on aarch64
   - tweak TTM LRU priority hint
   - GuC 69.0.3 support
   - remove short term execbuf pins

  nouveau:
   - higher DP/eDP bitrates
   - backlight fixes

  msm:
   - dpu + dp support for sc8180x
   - dp support for sm8350
   - dpu + dsi support for qcm2290
   - 10nm dsi phy tuning support
   - bridge support for dp encoder
   - gpu support for additional 7c3 SKUs

  ingenic:
   - HDMI support for JZ4780
   - aux channel EDID support

  ast:
   - AST2600 support
   - add wide screen support
   - create DP/DVI connectors

  omapdrm:
   - fix implicit dma_buf fencing

  vc4:
   - add CSC + full range support
   - better display firmware handoff

  panfrost:
   - add initial dual-core GPU support

  stm:
   - new revision support
   - fb handover support

  mediatek:
   - transfer display binding document to yaml format.
   - add mt8195 display device binding.
   - allow commands to be sent during video mode.
   - add wait_for_event for crtc disable by cmdq.

  tegra:
   - YUV format support

  rcar-du:
   - LVDS support for M3-W+ (R8A77961)

  exynos:
   - BGR pixel format for FIMD device"

* tag 'drm-next-2022-03-24' of git://anongit.freedesktop.org/drm/drm: (1529 commits)
  drm/i915/display: Do not re-enable PSR after it was marked as not reliable
  drm/i915/display: Fix HPD short pulse handling for eDP
  drm/amdgpu: Use drm_mode_copy()
  drm/radeon: Use drm_mode_copy()
  drm/amdgpu: Use ternary operator in `vcn_v1_0_start()`
  drm/amdgpu: Remove pointless on stack mode copies
  drm/amd/pm: fix indenting in __smu_cmn_reg_print_error()
  drm/amdgpu/dc: fix typos in comments
  drm/amdgpu: fix typos in comments
  drm/amd/pm: fix typos in comments
  drm/amdgpu: Add stolen reserved memory for MI25 SRIOV.
  drm/amdgpu: Merge get_reserved_allocation to get_vbios_allocations.
  drm/amdkfd: evict svm bo worker handle error
  drm/amdgpu/vcn: fix vcn ring test failure in igt reload test
  drm/amdgpu: only allow secure submission on rings which support that
  drm/amdgpu: fixed the warnings reported by kernel test robot
  drm/amd/display: 3.2.177
  drm/amd/display: [FW Promotion] Release 0.0.108.0
  drm/amd/display: Add save/restore PANEL_PWRSEQ_REF_DIV2
  drm/amd/display: Wait for hubp read line for Pollock
  ...

3 files changed, 165 insertions, 0 deletions

diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
index ccc23d8686e8..75e93efd669f 100644
--- a/drivers/platform/chrome/Kconfig
+++ b/drivers/platform/chrome/Kconfig
@@ -243,6 +243,17 @@ config CROS_USBPD_NOTIFY
 	  To compile this driver as a module, choose M here: the
 	  module will be called cros_usbpd_notify.
 
+config CHROMEOS_PRIVACY_SCREEN
+	tristate "ChromeOS Privacy Screen support"
+	depends on ACPI
+	depends on DRM
+	select DRM_PRIVACY_SCREEN
+	help
+	  This driver provides the support needed for the in-built electronic
+	  privacy screen that is present on some ChromeOS devices. When enabled,
+	  this should probably always be built into the kernel to avoid or
+	  minimize drm probe deferral.
+
 source "drivers/platform/chrome/wilco_ec/Kconfig"
 
 endif # CHROMEOS_PLATFORMS
diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
index f901d2e43166..5d4be9735d9d 100644
--- a/drivers/platform/chrome/Makefile
+++ b/drivers/platform/chrome/Makefile
@@ -4,6 +4,7 @@
 CFLAGS_cros_ec_trace.o:=		-I$(src)
 
 obj-$(CONFIG_CHROMEOS_LAPTOP)		+= chromeos_laptop.o
+obj-$(CONFIG_CHROMEOS_PRIVACY_SCREEN)	+= chromeos_privacy_screen.o
 obj-$(CONFIG_CHROMEOS_PSTORE)		+= chromeos_pstore.o
 obj-$(CONFIG_CHROMEOS_TBMC)		+= chromeos_tbmc.o
 obj-$(CONFIG_CROS_EC)			+= cros_ec.o
diff --git a/drivers/platform/chrome/chromeos_privacy_screen.c b/drivers/platform/chrome/chromeos_privacy_screen.c
new file mode 100644
index 000000000000..77e9f5ee8e33
--- /dev/null
+++ b/drivers/platform/chrome/chromeos_privacy_screen.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ *  ChromeOS Privacy Screen support
+ *
+ * Copyright (C) 2022 Google LLC
+ *
+ * This is the Chromeos privacy screen provider, present on certain chromebooks,
+ * represented by a GOOG0010 device in the ACPI. This ACPI device, if present,
+ * will cause the i915 drm driver to probe defer until this driver registers
+ * the privacy-screen.
+ */
+
+#include <linux/acpi.h>
+#include <drm/drm_privacy_screen_driver.h>
+
+/*
+ * The DSM (Device Specific Method) constants below are the agreed API with
+ * the firmware team, on how to control privacy screen using ACPI methods.
+ */
+#define PRIV_SCRN_DSM_REVID		1	/* DSM version */
+#define PRIV_SCRN_DSM_FN_GET_STATUS	1	/* Get privacy screen status */
+#define PRIV_SCRN_DSM_FN_ENABLE		2	/* Enable privacy screen */
+#define PRIV_SCRN_DSM_FN_DISABLE	3	/* Disable privacy screen */
+
+static const guid_t chromeos_privacy_screen_dsm_guid =
+		    GUID_INIT(0xc7033113, 0x8720, 0x4ceb,
+			      0x90, 0x90, 0x9d, 0x52, 0xb3, 0xe5, 0x2d, 0x73);
+
+static void
+chromeos_privacy_screen_get_hw_state(struct drm_privacy_screen
+				     *drm_privacy_screen)
+{
+	union acpi_object *obj;
+	acpi_handle handle;
+	struct device *privacy_screen =
+		drm_privacy_screen_get_drvdata(drm_privacy_screen);
+
+	handle = acpi_device_handle(to_acpi_device(privacy_screen));
+	obj = acpi_evaluate_dsm(handle, &chromeos_privacy_screen_dsm_guid,
+				PRIV_SCRN_DSM_REVID,
+				PRIV_SCRN_DSM_FN_GET_STATUS, NULL);
+	if (!obj) {
+		dev_err(privacy_screen,
+			"_DSM failed to get privacy-screen state\n");
+		return;
+	}
+
+	if (obj->type != ACPI_TYPE_INTEGER)
+		dev_err(privacy_screen,
+			"Bad _DSM to get privacy-screen state\n");
+	else if (obj->integer.value == 1)
+		drm_privacy_screen->hw_state = drm_privacy_screen->sw_state =
+			PRIVACY_SCREEN_ENABLED;
+	else
+		drm_privacy_screen->hw_state = drm_privacy_screen->sw_state =
+			PRIVACY_SCREEN_DISABLED;
+
+	ACPI_FREE(obj);
+}
+
+static int
+chromeos_privacy_screen_set_sw_state(struct drm_privacy_screen
+				     *drm_privacy_screen,
+				     enum drm_privacy_screen_status state)
+{
+	union acpi_object *obj = NULL;
+	acpi_handle handle;
+	struct device *privacy_screen =
+		drm_privacy_screen_get_drvdata(drm_privacy_screen);
+
+	handle = acpi_device_handle(to_acpi_device(privacy_screen));
+
+	if (state == PRIVACY_SCREEN_DISABLED) {
+		obj = acpi_evaluate_dsm(handle,
+					&chromeos_privacy_screen_dsm_guid,
+					PRIV_SCRN_DSM_REVID,
+					PRIV_SCRN_DSM_FN_DISABLE, NULL);
+	} else if (state == PRIVACY_SCREEN_ENABLED) {
+		obj = acpi_evaluate_dsm(handle,
+					&chromeos_privacy_screen_dsm_guid,
+					PRIV_SCRN_DSM_REVID,
+					PRIV_SCRN_DSM_FN_ENABLE, NULL);
+	} else {
+		dev_err(privacy_screen,
+			"Bad attempt to set privacy-screen status to %u\n",
+			state);
+		return -EINVAL;
+	}
+
+	if (!obj) {
+		dev_err(privacy_screen,
+			"_DSM failed to set privacy-screen state\n");
+		return -EIO;
+	}
+
+	drm_privacy_screen->hw_state = drm_privacy_screen->sw_state = state;
+	ACPI_FREE(obj);
+	return 0;
+}
+
+static const struct drm_privacy_screen_ops chromeos_privacy_screen_ops = {
+	.get_hw_state = chromeos_privacy_screen_get_hw_state,
+	.set_sw_state = chromeos_privacy_screen_set_sw_state,
+};
+
+static int chromeos_privacy_screen_add(struct acpi_device *adev)
+{
+	struct drm_privacy_screen *drm_privacy_screen =
+		drm_privacy_screen_register(&adev->dev,
+					    &chromeos_privacy_screen_ops,
+					    &adev->dev);
+
+	if (IS_ERR(drm_privacy_screen)) {
+		dev_err(&adev->dev, "Error registering privacy-screen\n");
+		return PTR_ERR(drm_privacy_screen);
+	}
+
+	adev->driver_data = drm_privacy_screen;
+	dev_info(&adev->dev, "registered privacy-screen '%s'\n",
+		 dev_name(&drm_privacy_screen->dev));
+
+	return 0;
+}
+
+static int chromeos_privacy_screen_remove(struct acpi_device *adev)
+{
+	struct drm_privacy_screen *drm_privacy_screen =	acpi_driver_data(adev);
+
+	drm_privacy_screen_unregister(drm_privacy_screen);
+	return 0;
+}
+
+static const struct acpi_device_id chromeos_privacy_screen_device_ids[] = {
+	{"GOOG0010", 0}, /* Google's electronic privacy screen for eDP-1 */
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, chromeos_privacy_screen_device_ids);
+
+static struct acpi_driver chromeos_privacy_screen_driver = {
+	.name = "chromeos_privacy_screen_driver",
+	.class = "ChromeOS",
+	.ids = chromeos_privacy_screen_device_ids,
+	.ops = {
+		.add = chromeos_privacy_screen_add,
+		.remove = chromeos_privacy_screen_remove,
+	},
+};
+
+module_acpi_driver(chromeos_privacy_screen_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ChromeOS ACPI Privacy Screen driver");
+MODULE_AUTHOR("Rajat Jain <rajatja@google.com>");