Merge tag 'drm-next-2021-11-03' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "Summary below. i915 starts to add support for DG2 GPUs, enables DG1
  and ADL-S support by default, lots of work to enable DisplayPort 2.0
  across drivers. Lots of documentation updates and fixes across the
  board.

  core:
   - improve dma_fence, lease and resv documentation
   - shmem-helpers: allocate WC pages on x86, use vmf_insert_pin
   - sched fixes/improvements
   - allow empty drm leases
   - add dma resv iterator
   - add more DP 2.0 headers
   - DP MST helper improvements for DP2.0

  dma-buf:
   - avoid warnings, remove fence trace macros

  bridge:
   - new helper to get rid of panels
   - probe improvements for it66121
   - enable DSI EOTP for anx7625

  fbdev:
   - efifb: release runtime PM on destroy

  ttm:
   - kerneldoc switch
   - helper to clear all DMA mappings
   - pool shrinker optimizaton
   - remove ttm_tt_destroy_common
   - update ttm_move_memcpy for async use

  panel:
   - add new panel-edp driver

  amdgpu:
   - Initial DP 2.0 support
   - Initial USB4 DP tunnelling support
   - Aldebaran MCE support
   - Modifier support for DCC image stores for GFX 10.3
   - Display rework for better FP code handling
   - Yellow Carp/Cyan Skillfish updates
   - Cyan Skillfish display support
   - convert vega/navi to IP discovery asic enumeration
   - validate IP discovery table
   - RAS improvements
   - Lots of fixes

  i915:
   - DG1 PCI IDs + LMEM discovery/placement
   - DG1 GuC submission by default
   - ADL-S PCI IDs updated + enabled by default
   - ADL-P (XE_LPD) fixed and updates
   - DG2 display fixes
   - PXP protected object support for Gen12 integrated
   - expose multi-LRC submission interface for GuC
   - export logical engine instance to user
   - Disable engine bonding on Gen12+
   - PSR cleanup
   - PSR2 selective fetch by default
   - DP 2.0 prep work
   - VESA vendor block + MSO use of it
   - FBC refactor
   - try again to fix fast-narrow vs slow-wide eDP training
   - use THP when IOMMU enabled
   - LMEM backup/restore for suspend/resume
   - locking simplification
   - GuC major reworking
   - async flip VT-D workaround changes
   - DP link training improvements
   - misc display refactorings

  bochs:
   - new PCI ID

  rcar-du:
   - Non-contiguious buffer import support for rcar-du
   - r8a779a0 support prep

  omapdrm:
   - COMPILE_TEST fixes

  sti:
   - COMPILE_TEST fixes

  msm:
   - fence ordering improvements
   - eDP support in DP sub-driver
   - dpu irq handling cleanup
   - CRC support for making igt happy
   - NO_CONNECTOR bridge support
   - dsi: 14nm phy support for msm8953
   - mdp5: msm8x53, sdm450, sdm632 support

  stm:
   - layer alpha + zpo support

  v3d:
   - fix Vulkan CTS failure
   - support multiple sync objects

  gud:
   - add R8/RGB332/RGB888 pixel formats

  vc4:
   - convert to new bridge helpers

  vgem:
   - use shmem helpers

  virtio:
   - support mapping exported vram

  zte:
   - remove obsolete driver

  rockchip:
   - use bridge attach no connector for LVDS/RGB"

* tag 'drm-next-2021-11-03' of git://anongit.freedesktop.org/drm/drm: (1259 commits)
  drm/amdgpu/gmc6: fix DMA mask from 44 to 40 bits
  drm/amd/display: MST support for DPIA
  drm/amdgpu: Fix even more out of bound writes from debugfs
  drm/amdgpu/discovery: add SDMA IP instance info for soc15 parts
  drm/amdgpu/discovery: add UVD/VCN IP instance info for soc15 parts
  drm/amdgpu/UAPI: rearrange header to better align related items
  drm/amd/display: Enable dpia in dmub only for DCN31 B0
  drm/amd/display: Fix USB4 hot plug crash issue
  drm/amd/display: Fix deadlock when falling back to v2 from v3
  drm/amd/display: Fallback to clocks which meet requested voltage on DCN31
  drm/amd/display: move FPU associated DCN301 code to DML folder
  drm/amd/display: fix link training regression for 1 or 2 lane
  drm/amd/display: add two lane settings training options
  drm/amd/display: decouple hw_lane_settings from dpcd_lane_settings
  drm/amd/display: implement decide lane settings
  drm/amd/display: adopt DP2.0 LT SCR revision 8
  drm/amd/display: FEC configuration for dpia links in MST mode
  drm/amd/display: FEC configuration for dpia links
  drm/amd/display: Add workaround flag for EDID read on certain docks
  drm/amd/display: Set phy_mux_sel bit in dmub scratch register
  ...

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_pps.c b/drivers/gpu/drm/i915/display/intel_pps.c
index a36ec4a818ff..e9c679bb1b2e 100644
--- a/drivers/gpu/drm/i915/display/intel_pps.c
+++ b/drivers/gpu/drm/i915/display/intel_pps.c
@@ -9,6 +9,7 @@
 #include "intel_display_types.h"
 #include "intel_dp.h"
 #include "intel_dpll.h"
+#include "intel_lvds.h"
 #include "intel_pps.h"
 
 static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
@@ -1408,3 +1409,61 @@ void intel_pps_setup(struct drm_i915_private *i915)
 	else
 		i915->pps_mmio_base = PPS_BASE;
 }
+
+void assert_pps_unlocked(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	i915_reg_t pp_reg;
+	u32 val;
+	enum pipe panel_pipe = INVALID_PIPE;
+	bool locked = true;
+
+	if (drm_WARN_ON(&dev_priv->drm, HAS_DDI(dev_priv)))
+		return;
+
+	if (HAS_PCH_SPLIT(dev_priv)) {
+		u32 port_sel;
+
+		pp_reg = PP_CONTROL(0);
+		port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
+
+		switch (port_sel) {
+		case PANEL_PORT_SELECT_LVDS:
+			intel_lvds_port_enabled(dev_priv, PCH_LVDS, &panel_pipe);
+			break;
+		case PANEL_PORT_SELECT_DPA:
+			g4x_dp_port_enabled(dev_priv, DP_A, PORT_A, &panel_pipe);
+			break;
+		case PANEL_PORT_SELECT_DPC:
+			g4x_dp_port_enabled(dev_priv, PCH_DP_C, PORT_C, &panel_pipe);
+			break;
+		case PANEL_PORT_SELECT_DPD:
+			g4x_dp_port_enabled(dev_priv, PCH_DP_D, PORT_D, &panel_pipe);
+			break;
+		default:
+			MISSING_CASE(port_sel);
+			break;
+		}
+	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		/* presumably write lock depends on pipe, not port select */
+		pp_reg = PP_CONTROL(pipe);
+		panel_pipe = pipe;
+	} else {
+		u32 port_sel;
+
+		pp_reg = PP_CONTROL(0);
+		port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
+
+		drm_WARN_ON(&dev_priv->drm,
+			    port_sel != PANEL_PORT_SELECT_LVDS);
+		intel_lvds_port_enabled(dev_priv, LVDS, &panel_pipe);
+	}
+
+	val = intel_de_read(dev_priv, pp_reg);
+	if (!(val & PANEL_POWER_ON) ||
+	    ((val & PANEL_UNLOCK_MASK) == PANEL_UNLOCK_REGS))
+		locked = false;
+
+	I915_STATE_WARN(panel_pipe == pipe && locked,
+			"panel assertion failure, pipe %c regs locked\n",
+			pipe_name(pipe));
+}