Merge tag 'drm-fixes-2021-12-03-1' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Bit of an uptick in patch count this week, though it's all relatively
  small overall.

  I suspect msm has been queuing up a few fixes to skew it here.
  Otherwise amdgpu has a scattered bunch of small fixes, and then some
  vc4, i915.

  virtio-gpu changes an rc1 introduced uAPI mistake, and makes it
  operate more like other drivers. This should be fine as no userspace
  relies on the behaviour yet.

  Summary:

  dma-buf:
   - memory leak fix

  msm:
   - kasan found memory overwrite
   - mmap flags
   - fencing error bug
   - ioctl NULL ptr
   - uninit var
   - devfreqless devices fix
   - dsi lanes fix
   - dp: avoid unpowered aux xfers

  amdgpu:
   - IP discovery based enumeration fixes
   - vkms fixes
   - DSC fixes for DP MST
   - Audio fix for hotplug with tiled displays
   - Misc display fixes
   - DP tunneling fix
   - DP fix
   - Aldebaran fix

  amdkfd:
   - Locking fix
   - Static checker fix
   - Fix double free

  i915:
   - backlight regression
   - Intel HDR backlight detection fix
   - revert TGL workaround that caused hangs

  virtio-gpu:
   - switch back to drm_poll

  vc4:
   - memory leak
   - error check fix
   - HVS modesetting fixes"

* tag 'drm-fixes-2021-12-03-1' of git://anongit.freedesktop.org/drm/drm: (41 commits)
  Revert "drm/i915: Implement Wa_1508744258"
  drm/amdkfd: process_info lock not needed for svm
  drm/amdgpu: adjust the kfd reset sequence in reset sriov function
  drm/amd/display: add connector type check for CRC source set
  drm/amdkfd: fix double free mem structure
  drm/amdkfd: set "r = 0" explicitly before goto
  drm/amd/display: Add work around for tunneled MST.
  drm/amd/display: Fix for the no Audio bug with Tiled Displays
  drm/amd/display: Clear DPCD lane settings after repeater training
  drm/amd/display: Allow DSC on supported MST branch devices
  drm/amdgpu: Don't halt RLC on GFX suspend
  drm/amdgpu: fix the missed handling for SDMA2 and SDMA3
  drm/amdgpu: check atomic flag to differeniate with legacy path
  drm/amdgpu: cancel the correct hrtimer on exit
  drm/amdgpu/sriov/vcn: add new vcn ip revision check case for SIENNA_CICHLID
  drm/i915/dp: Perform 30ms delay after source OUI write
  dma-buf: system_heap: Use 'for_each_sgtable_sg' in pages free flow
  drm/i915: Add support for panels with VESA backlights with PWM enable/disable
  drm/vc4: kms: Fix previous HVS commit wait
  drm/vc4: kms: Don't duplicate pending commit
  ...

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index be883469d2fc..a552f05a67e5 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -29,6 +29,7 @@
 #include <linux/i2c.h>
 #include <linux/notifier.h>
 #include <linux/slab.h>
+#include <linux/timekeeping.h>
 #include <linux/types.h>
 
 #include <asm/byteorder.h>
@@ -1955,6 +1956,16 @@ intel_edp_init_source_oui(struct intel_dp *intel_dp, bool careful)
 
 	if (drm_dp_dpcd_write(&intel_dp->aux, DP_SOURCE_OUI, oui, sizeof(oui)) < 0)
 		drm_err(&i915->drm, "Failed to write source OUI\n");
+
+	intel_dp->last_oui_write = jiffies;
+}
+
+void intel_dp_wait_source_oui(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+	drm_dbg_kms(&i915->drm, "Performing OUI wait\n");
+	wait_remaining_ms_from_jiffies(intel_dp->last_oui_write, 30);
 }
 
 /* If the device supports it, try to set the power state appropriately */