Re: drm2 removed?

On Mon, Feb 11, 2019 at 06:05:03PM +0100, Niclas Zeising wrote:
> On 2/11/19 5:20 PM, Steve Kargl wrote:
> > On Mon, Feb 11, 2019 at 08:12:05AM -0800, Steve Kargl wrote:
> >> Anyone have any idea which recent change broke the
> >> drm-legacy-kmod port.  This is why I raised an issue
> >> with removal of drm2 from src/sys.  How is suppose
> >> to be fixed?
> >>
> > 
> > It was r343567.  The merging of PAE and NO PAE pmap.h
> > by kib removed all of the missing macros. :(
> > 
> 
> Can you give attached patch a spin?
> Thanks!
> Regards
> -- 
> Niclas

The patch allows the port to be built.

kldloading the i915kms module causes a 'black screen
of death'

I'll note that there seems to be a race condition in 
booting a kernel (with or without the drm2 stuff).
During boot the kernel hangs (see below) :

---<<BOOT>>---
Copyright (c) 1992-2019 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 13.0-CURRENT r343477 MOBILE i386
FreeBSD clang version 7.0.1 (tags/RELEASE_701/final 349250) (based on LLVM 7.0.1)
VT(vga): resolution 640x480
CPU: Intel(R) Core(TM)2 Duo CPU     T7250  _at_ 2.00GHz (1995.05-MHz 686-class CPU)
  Origin="GenuineIntel"  Id=0x6fd  Family=0x6  Model=0xf  Stepping=13
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0xe3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM>
  AMD Features=0x20100000<NX,LM>
  AMD Features2=0x1<LAHF>
  VT-x: (disabled in BIOS) HLT,PAUSE
  TSC: P-state invariant, performance statistics
real memory  = 4294967296 (4096 MB)
avail memory = 3659202560 (3489 MB)
Event timer "LAPIC" quality 100
ACPI APIC Table: <DELL   M08    >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
Firmware Warning (ACPI): Incorrect checksum in table [TCPA] - 0x80, should be 0x24 (20190108/tbprint-337)
ioapic0: Changing APIC ID to 2
ioapic0 <Version 2.0> irqs 0-23 on motherboard
Launching APs: 1

*** kernel hangs here sometimes ***

Timecounter "TSC" frequency 1995048460 Hz quality 1000
random: entropy device external interface
kbd1 at kbdmux0


-- 
Steve