Issue #581 has been updated by Walter Sonius.

Related links updated

The 4th black SATA port does indeed work on the OEM 3.08revA firmware but not 
using the current 8300_elite template.
A quick compare of the devicetree generated by autoport shows that 8300_elite 
uses [register "sata_port_map" = "0xf"] while autoport on OEM firmware detects 
[register "sata_port_map" = "0x6"]. 
Will try to hack this single change in code and compile new version and let you 
know if 4th sata port works.

Further testing shows both onboard USB headers are also working in both OEM and 
current coreboot 8300_elite template with a total of 14 ports. Also the blue 
line-in 3,5mm jack is also working on OEM and current coreboot 8300_elite 
template using Audacity on line-in-0 port(reports mic0,mic1,linein0,line1).

The only thing not tested is the onboard parallel-port header.

----------------------------------------
Support #581: success new variant "compaq_pro_6300_sff" for hp/snb_ivb_desktops 
compatible with "compaq_8300_elite_sff" template
https://ticket.coreboot.org/issues/581#change-2007

* Author: Walter Sonius
* Status: New
* Priority: Normal
* Category: board support
* Target version: none
* Start date: 2025-03-15
----------------------------------------
Successful flash and coreboot SeaBIOS functioning of a HP "compaq_pro_6300_sff" 
with a unchanged "compaq_8300_elite_sff" template using coreboot 
(24.12-758-g1e7ba810c6bb) and SeaBIOS (version rel-1.16.3-0-ga6ed6b70).

These two HP Compaq devices are extremely similar, they use the same OEM 
proprietary BIOS upgrade files. Hardware wise the only 3 noticeable differences 
are that the "compaq_8300_elite_sff" comes with a Q77 chipset, SuperIO NPCD378 
and J32 labeled 16x length "white" PCI-E slot versus a Q75 chipset, SuperIO 
NPCD379HAKFX with the J32 labeled slot populated with a limited physical 1x 
length "black" PCI-E slot on the "compaq_pro_6300_sff".

Flashing from OEM proprietary BIOS 3.08revA enabling the FDO jumper on the 
motherboard as described for the compaq_8300_elite_sff works by booting with 
"iomem=relaxed" kernel parameter and specifying the specific 16MB chip 25Q128A: 
flashrom -p internal -w cbtest.rom -c "MT25QL128"

Tested and Working:
Poweron/Poweroff/Reboot
CPU i3-3220 / e3-1225v2
RAM 1x 2x 4x populated slots total of 4GB/8GB/16GB/24GB (both 1.35v and 1.5v 
modules mixed with ECC)
Serial port (including coreboot)
PS2 keyboard (including SeaBIOS)
PS2 mouse
SATA 3 ports (blue/white/white)
USB 2.0 4x front & 2x back ports
USB 3.0 4x back ports
Ethernet 1Gbit/100Mbit
Display port works in SeaBIOS and OS
VGA port only works in OS!
PCI using realtek RTL8169 1Gb
PCIE 3.0 16x using 2.0 8x 10Gb intel X540-AT2 / using 1.0 16x Nvidia Geforce 
6200 LE (also works in SeaBIOS)
PCIE 2.0 1x using 2.0 1x 2.5Gb realtek RTL8125
PCIE 2.0 1x using 1.0 1x 1Gb intel 82574L (SeaBIOS loads option rom)
Audio built-in speaker (plays music in OS compared to legacy bleep pc-speaker)
Audio front panel 3.5 mm headphone jack (auto disables built-in Speakers and 
selects Headphones)
Audio front panel 3.5 mm headphone&mic jack (only microphone works with 4 pin 
3.5mm combi mic/headphone)
Audio back panel 3.5mm green jack (manually select Line Out and it works)
Sensors CPU and 2 motherboard sensors
SuperIO
Booting USB / SATA(HDD/DVD)
OS: Fedora-mate Linux kernel 6.11.4 / 6.13.6, KDE neon Linux kernel 6.8.0-52
Flashrom: needs additional parameters compared to OEM BIOS both for read/write 
depending on flashrom version?

flashrom -p internal:boardmismatch=force,ich_spi_mode=hwseq -w test.rom -c 
"Opague flash chip"

Tested not Working:
RAM ECC functioning (see coreboot log)
SATA port black
Wakeonlan, it just auto wakes from itself so cannot verify...
iGPU multigpu with PCIE nvidia geforce 6200 le, only PCIE nvidia geforce works 
and iGPU gets disabled.

What to do next to get this "compaq_pro_6300_sff" variant officially supported?

*Supply more logs/info?
*Fill a bug for the ECC not working or first get this variant supported as is?
*Fill a bug that VGA doesn't work in SeaBIOS?
*Fill a bug/ticket on the flashrom support list for the difference in 
parameters needed pre/post flash?

https://support.hp.com/us-en/drivers/hp-compaq-pro-6300-small-form-factor-pc/model/5232884
https://support.hp.com/in-en/drivers/hp-compaq-elite-8300-small-form-factor-pc/model/5232855

Walter Sonius


---Files--------------------------------
cb-log-hp-compaq_pro_6300_sff.txt (51.8 KB)
hp-compaq-pro-6300-oem-and-coreboot-autoport.zip (266 KB)


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