Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 750 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_modeset_setup.c b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
new file mode 100644
index 000000000..96395bfbd
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
@@ -0,0 +1,750 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ *
+ * Read out the current hardware modeset state, and sanitize it to the current
+ * state.
+ */
+
+#include <drm/drm_atomic_uapi.h>
+#include <drm/drm_atomic_state_helper.h>
+
+#include "i915_drv.h"
+#include "i915_reg.h"
+#include "intel_atomic.h"
+#include "intel_bw.h"
+#include "intel_color.h"
+#include "intel_crtc.h"
+#include "intel_crtc_state_dump.h"
+#include "intel_ddi.h"
+#include "intel_de.h"
+#include "intel_display.h"
+#include "intel_display_power.h"
+#include "intel_display_types.h"
+#include "intel_modeset_setup.h"
+#include "intel_pch_display.h"
+#include "intel_pm.h"
+#include "skl_watermark.h"
+
+static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
+					struct drm_modeset_acquire_ctx *ctx)
+{
+	struct intel_encoder *encoder;
+	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	struct intel_bw_state *bw_state =
+		to_intel_bw_state(i915->display.bw.obj.state);
+	struct intel_cdclk_state *cdclk_state =
+		to_intel_cdclk_state(i915->display.cdclk.obj.state);
+	struct intel_dbuf_state *dbuf_state =
+		to_intel_dbuf_state(i915->display.dbuf.obj.state);
+	struct intel_crtc_state *crtc_state =
+		to_intel_crtc_state(crtc->base.state);
+	struct intel_plane *plane;
+	struct drm_atomic_state *state;
+	struct intel_crtc_state *temp_crtc_state;
+	enum pipe pipe = crtc->pipe;
+	int ret;
+
+	if (!crtc_state->hw.active)
+		return;
+
+	for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+		const struct intel_plane_state *plane_state =
+			to_intel_plane_state(plane->base.state);
+
+		if (plane_state->uapi.visible)
+			intel_plane_disable_noatomic(crtc, plane);
+	}
+
+	state = drm_atomic_state_alloc(&i915->drm);
+	if (!state) {
+		drm_dbg_kms(&i915->drm,
+			    "failed to disable [CRTC:%d:%s], out of memory",
+			    crtc->base.base.id, crtc->base.name);
+		return;
+	}
+
+	state->acquire_ctx = ctx;
+
+	/* Everything's already locked, -EDEADLK can't happen. */
+	temp_crtc_state = intel_atomic_get_crtc_state(state, crtc);
+	ret = drm_atomic_add_affected_connectors(state, &crtc->base);
+
+	drm_WARN_ON(&i915->drm, IS_ERR(temp_crtc_state) || ret);
+
+	i915->display.funcs.display->crtc_disable(to_intel_atomic_state(state), crtc);
+
+	drm_atomic_state_put(state);
+
+	drm_dbg_kms(&i915->drm,
+		    "[CRTC:%d:%s] hw state adjusted, was enabled, now disabled\n",
+		    crtc->base.base.id, crtc->base.name);
+
+	crtc->active = false;
+	crtc->base.enabled = false;
+
+	drm_WARN_ON(&i915->drm,
+		    drm_atomic_set_mode_for_crtc(&crtc_state->uapi, NULL) < 0);
+	crtc_state->uapi.active = false;
+	crtc_state->uapi.connector_mask = 0;
+	crtc_state->uapi.encoder_mask = 0;
+	intel_crtc_free_hw_state(crtc_state);
+	memset(&crtc_state->hw, 0, sizeof(crtc_state->hw));
+
+	for_each_encoder_on_crtc(&i915->drm, &crtc->base, encoder)
+		encoder->base.crtc = NULL;
+
+	intel_fbc_disable(crtc);
+	intel_update_watermarks(i915);
+	intel_disable_shared_dpll(crtc_state);
+
+	intel_display_power_put_all_in_set(i915, &crtc->enabled_power_domains);
+
+	cdclk_state->min_cdclk[pipe] = 0;
+	cdclk_state->min_voltage_level[pipe] = 0;
+	cdclk_state->active_pipes &= ~BIT(pipe);
+
+	dbuf_state->active_pipes &= ~BIT(pipe);
+
+	bw_state->data_rate[pipe] = 0;
+	bw_state->num_active_planes[pipe] = 0;
+}
+
+static void intel_modeset_update_connector_atomic_state(struct drm_i915_private *i915)
+{
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+
+	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		struct drm_connector_state *conn_state = connector->base.state;
+		struct intel_encoder *encoder =
+			to_intel_encoder(connector->base.encoder);
+
+		if (conn_state->crtc)
+			drm_connector_put(&connector->base);
+
+		if (encoder) {
+			struct intel_crtc *crtc =
+				to_intel_crtc(encoder->base.crtc);
+			const struct intel_crtc_state *crtc_state =
+				to_intel_crtc_state(crtc->base.state);
+
+			conn_state->best_encoder = &encoder->base;
+			conn_state->crtc = &crtc->base;
+			conn_state->max_bpc = (crtc_state->pipe_bpp ?: 24) / 3;
+
+			drm_connector_get(&connector->base);
+		} else {
+			conn_state->best_encoder = NULL;
+			conn_state->crtc = NULL;
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+}
+
+static void intel_crtc_copy_hw_to_uapi_state(struct intel_crtc_state *crtc_state)
+{
+	if (intel_crtc_is_bigjoiner_slave(crtc_state))
+		return;
+
+	crtc_state->uapi.enable = crtc_state->hw.enable;
+	crtc_state->uapi.active = crtc_state->hw.active;
+	drm_WARN_ON(crtc_state->uapi.crtc->dev,
+		    drm_atomic_set_mode_for_crtc(&crtc_state->uapi, &crtc_state->hw.mode) < 0);
+
+	crtc_state->uapi.adjusted_mode = crtc_state->hw.adjusted_mode;
+	crtc_state->uapi.scaling_filter = crtc_state->hw.scaling_filter;
+
+	/* assume 1:1 mapping */
+	drm_property_replace_blob(&crtc_state->hw.degamma_lut,
+				  crtc_state->pre_csc_lut);
+	drm_property_replace_blob(&crtc_state->hw.gamma_lut,
+				  crtc_state->post_csc_lut);
+
+	drm_property_replace_blob(&crtc_state->uapi.degamma_lut,
+				  crtc_state->hw.degamma_lut);
+	drm_property_replace_blob(&crtc_state->uapi.gamma_lut,
+				  crtc_state->hw.gamma_lut);
+	drm_property_replace_blob(&crtc_state->uapi.ctm,
+				  crtc_state->hw.ctm);
+}
+
+static void
+intel_sanitize_plane_mapping(struct drm_i915_private *i915)
+{
+	struct intel_crtc *crtc;
+
+	if (DISPLAY_VER(i915) >= 4)
+		return;
+
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_plane *plane =
+			to_intel_plane(crtc->base.primary);
+		struct intel_crtc *plane_crtc;
+		enum pipe pipe;
+
+		if (!plane->get_hw_state(plane, &pipe))
+			continue;
+
+		if (pipe == crtc->pipe)
+			continue;
+
+		drm_dbg_kms(&i915->drm,
+			    "[PLANE:%d:%s] attached to the wrong pipe, disabling plane\n",
+			    plane->base.base.id, plane->base.name);
+
+		plane_crtc = intel_crtc_for_pipe(i915, pipe);
+		intel_plane_disable_noatomic(plane_crtc, plane);
+	}
+}
+
+static bool intel_crtc_has_encoders(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct intel_encoder *encoder;
+
+	for_each_encoder_on_crtc(dev, &crtc->base, encoder)
+		return true;
+
+	return false;
+}
+
+static struct intel_connector *intel_encoder_find_connector(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	struct drm_connector_list_iter conn_iter;
+	struct intel_connector *connector;
+	struct intel_connector *found_connector = NULL;
+
+	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (&encoder->base == connector->base.encoder) {
+			found_connector = connector;
+			break;
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	return found_connector;
+}
+
+static void intel_sanitize_fifo_underrun_reporting(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+
+	if (!crtc_state->hw.active && !HAS_GMCH(i915))
+		return;
+
+	/*
+	 * We start out with underrun reporting disabled to avoid races.
+	 * For correct bookkeeping mark this on active crtcs.
+	 *
+	 * Also on gmch platforms we dont have any hardware bits to
+	 * disable the underrun reporting. Which means we need to start
+	 * out with underrun reporting disabled also on inactive pipes,
+	 * since otherwise we'll complain about the garbage we read when
+	 * e.g. coming up after runtime pm.
+	 *
+	 * No protection against concurrent access is required - at
+	 * worst a fifo underrun happens which also sets this to false.
+	 */
+	crtc->cpu_fifo_underrun_disabled = true;
+
+	/*
+	 * We track the PCH trancoder underrun reporting state
+	 * within the crtc. With crtc for pipe A housing the underrun
+	 * reporting state for PCH transcoder A, crtc for pipe B housing
+	 * it for PCH transcoder B, etc. LPT-H has only PCH transcoder A,
+	 * and marking underrun reporting as disabled for the non-existing
+	 * PCH transcoders B and C would prevent enabling the south
+	 * error interrupt (see cpt_can_enable_serr_int()).
+	 */
+	if (intel_has_pch_trancoder(i915, crtc->pipe))
+		crtc->pch_fifo_underrun_disabled = true;
+}
+
+static void intel_sanitize_crtc(struct intel_crtc *crtc,
+				struct drm_modeset_acquire_ctx *ctx)
+{
+	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state);
+
+	if (crtc_state->hw.active) {
+		struct intel_plane *plane;
+
+		/* Disable everything but the primary plane */
+		for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+			const struct intel_plane_state *plane_state =
+				to_intel_plane_state(plane->base.state);
+
+			if (plane_state->uapi.visible &&
+			    plane->base.type != DRM_PLANE_TYPE_PRIMARY)
+				intel_plane_disable_noatomic(crtc, plane);
+		}
+
+		/* Disable any background color/etc. set by the BIOS */
+		intel_color_commit_noarm(crtc_state);
+		intel_color_commit_arm(crtc_state);
+	}
+
+	/*
+	 * Adjust the state of the output pipe according to whether we have
+	 * active connectors/encoders.
+	 */
+	if (crtc_state->hw.active && !intel_crtc_has_encoders(crtc) &&
+	    !intel_crtc_is_bigjoiner_slave(crtc_state))
+		intel_crtc_disable_noatomic(crtc, ctx);
+}
+
+static bool has_bogus_dpll_config(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+
+	/*
+	 * Some SNB BIOSen (eg. ASUS K53SV) are known to misprogram
+	 * the hardware when a high res displays plugged in. DPLL P
+	 * divider is zero, and the pipe timings are bonkers. We'll
+	 * try to disable everything in that case.
+	 *
+	 * FIXME would be nice to be able to sanitize this state
+	 * without several WARNs, but for now let's take the easy
+	 * road.
+	 */
+	return IS_SANDYBRIDGE(i915) &&
+		crtc_state->hw.active &&
+		crtc_state->shared_dpll &&
+		crtc_state->port_clock == 0;
+}
+
+static void intel_sanitize_encoder(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	struct intel_connector *connector;
+	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
+	struct intel_crtc_state *crtc_state = crtc ?
+		to_intel_crtc_state(crtc->base.state) : NULL;
+
+	/*
+	 * We need to check both for a crtc link (meaning that the encoder is
+	 * active and trying to read from a pipe) and the pipe itself being
+	 * active.
+	 */
+	bool has_active_crtc = crtc_state &&
+		crtc_state->hw.active;
+
+	if (crtc_state && has_bogus_dpll_config(crtc_state)) {
+		drm_dbg_kms(&i915->drm,
+			    "BIOS has misprogrammed the hardware. Disabling pipe %c\n",
+			    pipe_name(crtc->pipe));
+		has_active_crtc = false;
+	}
+
+	connector = intel_encoder_find_connector(encoder);
+	if (connector && !has_active_crtc) {
+		drm_dbg_kms(&i915->drm,
+			    "[ENCODER:%d:%s] has active connectors but no active pipe!\n",
+			    encoder->base.base.id,
+			    encoder->base.name);
+
+		/*
+		 * Connector is active, but has no active pipe. This is fallout
+		 * from our resume register restoring. Disable the encoder
+		 * manually again.
+		 */
+		if (crtc_state) {
+			struct drm_encoder *best_encoder;
+
+			drm_dbg_kms(&i915->drm,
+				    "[ENCODER:%d:%s] manually disabled\n",
+				    encoder->base.base.id,
+				    encoder->base.name);
+
+			/* avoid oopsing in case the hooks consult best_encoder */
+			best_encoder = connector->base.state->best_encoder;
+			connector->base.state->best_encoder = &encoder->base;
+
+			/* FIXME NULL atomic state passed! */
+			if (encoder->disable)
+				encoder->disable(NULL, encoder, crtc_state,
+						 connector->base.state);
+			if (encoder->post_disable)
+				encoder->post_disable(NULL, encoder, crtc_state,
+						      connector->base.state);
+
+			connector->base.state->best_encoder = best_encoder;
+		}
+		encoder->base.crtc = NULL;
+
+		/*
+		 * Inconsistent output/port/pipe state happens presumably due to
+		 * a bug in one of the get_hw_state functions. Or someplace else
+		 * in our code, like the register restore mess on resume. Clamp
+		 * things to off as a safer default.
+		 */
+		connector->base.dpms = DRM_MODE_DPMS_OFF;
+		connector->base.encoder = NULL;
+	}
+
+	/* notify opregion of the sanitized encoder state */
+	intel_opregion_notify_encoder(encoder, connector && has_active_crtc);
+
+	if (HAS_DDI(i915))
+		intel_ddi_sanitize_encoder_pll_mapping(encoder);
+}
+
+/* FIXME read out full plane state for all planes */
+static void readout_plane_state(struct drm_i915_private *i915)
+{
+	struct intel_plane *plane;
+	struct intel_crtc *crtc;
+
+	for_each_intel_plane(&i915->drm, plane) {
+		struct intel_plane_state *plane_state =
+			to_intel_plane_state(plane->base.state);
+		struct intel_crtc_state *crtc_state;
+		enum pipe pipe = PIPE_A;
+		bool visible;
+
+		visible = plane->get_hw_state(plane, &pipe);
+
+		crtc = intel_crtc_for_pipe(i915, pipe);
+		crtc_state = to_intel_crtc_state(crtc->base.state);
+
+		intel_set_plane_visible(crtc_state, plane_state, visible);
+
+		drm_dbg_kms(&i915->drm,
+			    "[PLANE:%d:%s] hw state readout: %s, pipe %c\n",
+			    plane->base.base.id, plane->base.name,
+			    str_enabled_disabled(visible), pipe_name(pipe));
+	}
+
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+
+		intel_plane_fixup_bitmasks(crtc_state);
+	}
+}
+
+static void intel_modeset_readout_hw_state(struct drm_i915_private *i915)
+{
+	struct intel_cdclk_state *cdclk_state =
+		to_intel_cdclk_state(i915->display.cdclk.obj.state);
+	struct intel_dbuf_state *dbuf_state =
+		to_intel_dbuf_state(i915->display.dbuf.obj.state);
+	enum pipe pipe;
+	struct intel_crtc *crtc;
+	struct intel_encoder *encoder;
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	u8 active_pipes = 0;
+
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+
+		__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
+		intel_crtc_free_hw_state(crtc_state);
+		intel_crtc_state_reset(crtc_state, crtc);
+
+		intel_crtc_get_pipe_config(crtc_state);
+
+		crtc_state->hw.enable = crtc_state->hw.active;
+
+		crtc->base.enabled = crtc_state->hw.enable;
+		crtc->active = crtc_state->hw.active;
+
+		if (crtc_state->hw.active)
+			active_pipes |= BIT(crtc->pipe);
+
+		drm_dbg_kms(&i915->drm,
+			    "[CRTC:%d:%s] hw state readout: %s\n",
+			    crtc->base.base.id, crtc->base.name,
+			    str_enabled_disabled(crtc_state->hw.active));
+	}
+
+	cdclk_state->active_pipes = active_pipes;
+	dbuf_state->active_pipes = active_pipes;
+
+	readout_plane_state(i915);
+
+	for_each_intel_encoder(&i915->drm, encoder) {
+		struct intel_crtc_state *crtc_state = NULL;
+
+		pipe = 0;
+
+		if (encoder->get_hw_state(encoder, &pipe)) {
+			crtc = intel_crtc_for_pipe(i915, pipe);
+			crtc_state = to_intel_crtc_state(crtc->base.state);
+
+			encoder->base.crtc = &crtc->base;
+			intel_encoder_get_config(encoder, crtc_state);
+
+			/* read out to slave crtc as well for bigjoiner */
+			if (crtc_state->bigjoiner_pipes) {
+				struct intel_crtc *slave_crtc;
+
+				/* encoder should read be linked to bigjoiner master */
+				WARN_ON(intel_crtc_is_bigjoiner_slave(crtc_state));
+
+				for_each_intel_crtc_in_pipe_mask(&i915->drm, slave_crtc,
+								 intel_crtc_bigjoiner_slave_pipes(crtc_state)) {
+					struct intel_crtc_state *slave_crtc_state;
+
+					slave_crtc_state = to_intel_crtc_state(slave_crtc->base.state);
+					intel_encoder_get_config(encoder, slave_crtc_state);
+				}
+			}
+		} else {
+			encoder->base.crtc = NULL;
+		}
+
+		if (encoder->sync_state)
+			encoder->sync_state(encoder, crtc_state);
+
+		drm_dbg_kms(&i915->drm,
+			    "[ENCODER:%d:%s] hw state readout: %s, pipe %c\n",
+			    encoder->base.base.id, encoder->base.name,
+			    str_enabled_disabled(encoder->base.crtc),
+			    pipe_name(pipe));
+	}
+
+	intel_dpll_readout_hw_state(i915);
+
+	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (connector->get_hw_state(connector)) {
+			struct intel_crtc_state *crtc_state;
+			struct intel_crtc *crtc;
+
+			connector->base.dpms = DRM_MODE_DPMS_ON;
+
+			encoder = intel_attached_encoder(connector);
+			connector->base.encoder = &encoder->base;
+
+			crtc = to_intel_crtc(encoder->base.crtc);
+			crtc_state = crtc ? to_intel_crtc_state(crtc->base.state) : NULL;
+
+			if (crtc_state && crtc_state->hw.active) {
+				/*
+				 * This has to be done during hardware readout
+				 * because anything calling .crtc_disable may
+				 * rely on the connector_mask being accurate.
+				 */
+				crtc_state->uapi.connector_mask |=
+					drm_connector_mask(&connector->base);
+				crtc_state->uapi.encoder_mask |=
+					drm_encoder_mask(&encoder->base);
+			}
+		} else {
+			connector->base.dpms = DRM_MODE_DPMS_OFF;
+			connector->base.encoder = NULL;
+		}
+		drm_dbg_kms(&i915->drm,
+			    "[CONNECTOR:%d:%s] hw state readout: %s\n",
+			    connector->base.base.id, connector->base.name,
+			    str_enabled_disabled(connector->base.encoder));
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_bw_state *bw_state =
+			to_intel_bw_state(i915->display.bw.obj.state);
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+		struct intel_plane *plane;
+		int min_cdclk = 0;
+
+		if (crtc_state->hw.active) {
+			/*
+			 * The initial mode needs to be set in order to keep
+			 * the atomic core happy. It wants a valid mode if the
+			 * crtc's enabled, so we do the above call.
+			 *
+			 * But we don't set all the derived state fully, hence
+			 * set a flag to indicate that a full recalculation is
+			 * needed on the next commit.
+			 */
+			crtc_state->inherited = true;
+
+			intel_crtc_update_active_timings(crtc_state);
+
+			intel_crtc_copy_hw_to_uapi_state(crtc_state);
+		}
+
+		for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+			const struct intel_plane_state *plane_state =
+				to_intel_plane_state(plane->base.state);
+
+			/*
+			 * FIXME don't have the fb yet, so can't
+			 * use intel_plane_data_rate() :(
+			 */
+			if (plane_state->uapi.visible)
+				crtc_state->data_rate[plane->id] =
+					4 * crtc_state->pixel_rate;
+			/*
+			 * FIXME don't have the fb yet, so can't
+			 * use plane->min_cdclk() :(
+			 */
+			if (plane_state->uapi.visible && plane->min_cdclk) {
+				if (crtc_state->double_wide || DISPLAY_VER(i915) >= 10)
+					crtc_state->min_cdclk[plane->id] =
+						DIV_ROUND_UP(crtc_state->pixel_rate, 2);
+				else
+					crtc_state->min_cdclk[plane->id] =
+						crtc_state->pixel_rate;
+			}
+			drm_dbg_kms(&i915->drm,
+				    "[PLANE:%d:%s] min_cdclk %d kHz\n",
+				    plane->base.base.id, plane->base.name,
+				    crtc_state->min_cdclk[plane->id]);
+		}
+
+		if (crtc_state->hw.active) {
+			min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
+			if (drm_WARN_ON(&i915->drm, min_cdclk < 0))
+				min_cdclk = 0;
+		}
+
+		cdclk_state->min_cdclk[crtc->pipe] = min_cdclk;
+		cdclk_state->min_voltage_level[crtc->pipe] =
+			crtc_state->min_voltage_level;
+
+		intel_bw_crtc_update(bw_state, crtc_state);
+	}
+}
+
+static void
+get_encoder_power_domains(struct drm_i915_private *i915)
+{
+	struct intel_encoder *encoder;
+
+	for_each_intel_encoder(&i915->drm, encoder) {
+		struct intel_crtc_state *crtc_state;
+
+		if (!encoder->get_power_domains)
+			continue;
+
+		/*
+		 * MST-primary and inactive encoders don't have a crtc state
+		 * and neither of these require any power domain references.
+		 */
+		if (!encoder->base.crtc)
+			continue;
+
+		crtc_state = to_intel_crtc_state(encoder->base.crtc->state);
+		encoder->get_power_domains(encoder, crtc_state);
+	}
+}
+
+static void intel_early_display_was(struct drm_i915_private *i915)
+{
+	/*
+	 * Display WA #1185 WaDisableDARBFClkGating:glk,icl,ehl,tgl
+	 * Also known as Wa_14010480278.
+	 */
+	if (IS_DISPLAY_VER(i915, 10, 12))
+		intel_de_write(i915, GEN9_CLKGATE_DIS_0,
+			       intel_de_read(i915, GEN9_CLKGATE_DIS_0) | DARBF_GATING_DIS);
+
+	if (IS_HASWELL(i915)) {
+		/*
+		 * WaRsPkgCStateDisplayPMReq:hsw
+		 * System hang if this isn't done before disabling all planes!
+		 */
+		intel_de_write(i915, CHICKEN_PAR1_1,
+			       intel_de_read(i915, CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
+	}
+
+	if (IS_KABYLAKE(i915) || IS_COFFEELAKE(i915) || IS_COMETLAKE(i915)) {
+		/* Display WA #1142:kbl,cfl,cml */
+		intel_de_rmw(i915, CHICKEN_PAR1_1,
+			     KBL_ARB_FILL_SPARE_22, KBL_ARB_FILL_SPARE_22);
+		intel_de_rmw(i915, CHICKEN_MISC_2,
+			     KBL_ARB_FILL_SPARE_13 | KBL_ARB_FILL_SPARE_14,
+			     KBL_ARB_FILL_SPARE_14);
+	}
+}
+
+void intel_modeset_setup_hw_state(struct drm_i915_private *i915,
+				  struct drm_modeset_acquire_ctx *ctx)
+{
+	struct intel_encoder *encoder;
+	struct intel_crtc *crtc;
+	intel_wakeref_t wakeref;
+
+	wakeref = intel_display_power_get(i915, POWER_DOMAIN_INIT);
+
+	intel_early_display_was(i915);
+	intel_modeset_readout_hw_state(i915);
+
+	/* HW state is read out, now we need to sanitize this mess. */
+	get_encoder_power_domains(i915);
+
+	intel_pch_sanitize(i915);
+
+	/*
+	 * intel_sanitize_plane_mapping() may need to do vblank
+	 * waits, so we need vblank interrupts restored beforehand.
+	 */
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+
+		intel_sanitize_fifo_underrun_reporting(crtc_state);
+
+		drm_crtc_vblank_reset(&crtc->base);
+
+		if (crtc_state->hw.active)
+			intel_crtc_vblank_on(crtc_state);
+	}
+
+	intel_fbc_sanitize(i915);
+
+	intel_sanitize_plane_mapping(i915);
+
+	for_each_intel_encoder(&i915->drm, encoder)
+		intel_sanitize_encoder(encoder);
+
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+
+		intel_sanitize_crtc(crtc, ctx);
+		intel_crtc_state_dump(crtc_state, NULL, "setup_hw_state");
+	}
+
+	intel_modeset_update_connector_atomic_state(i915);
+
+	intel_dpll_sanitize_state(i915);
+
+	if (IS_G4X(i915)) {
+		g4x_wm_get_hw_state(i915);
+		g4x_wm_sanitize(i915);
+	} else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
+		vlv_wm_get_hw_state(i915);
+		vlv_wm_sanitize(i915);
+	} else if (DISPLAY_VER(i915) >= 9) {
+		skl_wm_get_hw_state(i915);
+		skl_wm_sanitize(i915);
+	} else if (HAS_PCH_SPLIT(i915)) {
+		ilk_wm_get_hw_state(i915);
+	}
+
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+		struct intel_power_domain_mask put_domains;
+
+		intel_modeset_get_crtc_power_domains(crtc_state, &put_domains);
+		if (drm_WARN_ON(&i915->drm, !bitmap_empty(put_domains.bits, POWER_DOMAIN_NUM)))
+			intel_modeset_put_crtc_power_domains(crtc, &put_domains);
+	}
+
+	intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
+
+	intel_power_domains_sanitize_state(i915);
+}