Merge tag 'drm-fixes-2026-10-17' of https://gitlab.freedesktop.org/drm/kernelHEADmaster

Pull drm fixes from Dave Airlie:
 "Last set of fixes, mostly amdgpu, some i915 and xe.

  I think the dma-buf revert is probably the most important: while it is
  technically correct the fallout from it means we shouldn't enable
  DMABUF_DEBUG like that yet, and fix the fallout first.

  Summary:

  MAINTAINERS update

  dma-buf:
   - revert dma-debug y on debug kernel due to msm interaction

  core:
   - fix drm_exec prelocked object interaction

  i915:
   - Fix ARL-S host bridge detection
   - Add sanity checks for malformed DMC firmware

  xe:
   - OA uAPI fix
   - shrinker fix
   - fix eviction of object with no bo resource
   - fix LRU for external objects

  amdgpu:
   - UVD fix
   - TTM sched entity fixes
   - SMU 14 fix
   - Userptr leak fixes
   - Runpm ref count fix
   - CRIU fix
   - UserQ fixes
   - USB4 fix
   - SDMA 3 fix

  virtio-gpu:
   - revert double setting blend property
   - reset device before deleting vqs on freeze

  vc4:
   - fix hdmi audio runtime_pm interaction

  amdxdna:
   - fix Kconfig invalid configuration

  rocket:
   - fix error path for failed init
   - fix core unbinding and scheduler lookup paths

  panthor:
   - fix immortalis configuration"

* tag 'drm-fixes-2026-10-17' of https://gitlab.freedesktop.org/drm/kernel: (31 commits)
  drm/amdgpu/sdma3: Work around POLL_REGMEM / FENCE hang
  drm/amdgpu: keep the eviction fence until the last handle is closed
  drm/amd/display: Fix NULL sink dereference in USB4 bandwidth functions
  drm/amdgpu/userq: actually validate userq BOs
  drm/amdgpu: report the BO alignment in bytes in GEM_LIST_HANDLES
  drm/amdgpu: free the userptr ranges when a CS fails after parser_bos
  drm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr
  drm/amdgpu: fix GEM object leak on ENOMEM in userptr ioctl
  drm/amd/pm: add zero fan stop temperature support on smu 14.0.2
  drm/amdgpu: destroy mutex when tearing down ttm buffer entity
  drm/amdgpu: fix sched entity leak in ttm buffer entity init
  drm/amdgpu/uvd3.1: Fix checking whether UVD firmware keyselect was already set
  drm/panthor: fix immortalis condition
  drm/i915/cx0_phy: Fix ARL-S host bridge detection
  drm/i915/dmc: Add sanity check for DMC load address
  drm/i915/dmc: Harden DMC firmware payload parsing
  drm/exec: don't immediately add prelocked obj to array of locked objs
  drm/virtio: Reset device before deleting virtqueues on freeze
  drm/xe: Bump LRU for external objects on exec and rebind
  drm/xe/oa: Zero OA buffer at allocation
  ...

1 files changed, 14 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
index 48b086d15ab0..25ec3d38a14e 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
@@ -2306,9 +2306,14 @@ static bool allocate_usb4_bandwidth_for_stream(struct dc_stream_state *stream, i
 {
 	ASSERT(stream->sink);
 
-	struct dc_link *link = stream->sink->link;
+	struct dc_link *link;
 	int req_bw = stream_bw;
 
+	if (!stream->sink)
+		return false;
+
+	link = stream->sink->link;
+
 	DC_LOGGER_INIT(link->ctx->logger);
 
 	if (!link->dpia_bw_alloc_config.bw_alloc_enabled)
@@ -2355,9 +2360,13 @@ static bool allocate_usb4_bandwidth(struct dc_stream_state *stream)
 	ASSERT(stream->sink);
 
 	bool ret;
+	int bw;
 
-	int bw = dc_bandwidth_in_kbps_from_timing(&stream->timing,
-			dc_link_get_highest_encoding_format(stream->sink->link));
+	if (!stream->sink)
+		return false;
+
+	bw = dc_bandwidth_in_kbps_from_timing(&stream->timing,
+					      dc_link_get_highest_encoding_format(stream->sink->link));
 
 	ret = allocate_usb4_bandwidth_for_stream(stream, bw);
 
@@ -2419,7 +2428,8 @@ enum dc_status link_set_dpms_off(struct pipe_ctx *pipe_ctx)
 	update_psp_stream_config(pipe_ctx, true);
 	dc->hwss.blank_stream(pipe_ctx);
 
-	if (pipe_ctx->link_config.dp_tunnel_settings.should_use_dp_bw_allocation)
+	if (pipe_ctx->link_config.dp_tunnel_settings.should_use_dp_bw_allocation &&
+	    stream->sink)
 		deallocate_usb4_bandwidth(stream);
 
 	if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)