On Tue, Jun 01, 2021 at 07:43:27PM +0200, Matthias Pressfreund wrote:
> Ok, here you go ...
>
> In approx. 4 out of 10 times the boot process does not conclude.
Thanks. I believe the "use drm_mm from linux 5.7.y" changes are
implicated in this though there is nothing cherryview/braswell
specific in that.
I think we should disable ppgtt on cherryview/braswell until the cause
is known. Does this help?
Index: sys/dev/pci/drm/i915/i915_pci.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/drm/i915/i915_pci.c,v
retrieving revision 1.4
diff -u -p -r1.4 i915_pci.c
--- sys/dev/pci/drm/i915/i915_pci.c 1 Jul 2020 02:08:14 -0000 1.4
+++ sys/dev/pci/drm/i915/i915_pci.c 3 Jun 2021 13:24:20 -0000
@@ -598,7 +598,15 @@ static const struct intel_device_info ch
.has_logical_ring_contexts = 0,
#endif
.display.has_gmch = 1,
+#ifdef __linux__
.ppgtt_type = INTEL_PPGTT_ALIASING,
+#else
+ /*
+ * Enabling aliasing ppgtt results in struct gen6_ppgtt
+ * being overwritten.
+ */
+ .ppgtt_type = INTEL_PPGTT_NONE,
+#endif
.ppgtt_size = 32,
.has_reset_engine = 1,
.has_snoop = true,
