Partial success with Radeon RX580, but no HDMI sound yet

[cpghost]

Hello,

thanks to the heroic efforts of the developers who
ported amdgpu and drm-next-kmod to 11-STABLE, I was
able to get X working on a Radeon RX580 on my system:

FreeBSD monster 11.2-BETA2 FreeBSD 11.2-BETA2 #1 r334062:
Tue May 22 23:46:29 CEST 2018 root at monster:/usr/obj/usr/src/sys/GENERIC amd64

by installing:

x11-drivers/xf86-video-amdgpu
graphics/drm-next-kmod
graphics/gpu-firmware-kmod

then adding to /etc/rc.conf:

kld_list="amdgpu"

and adding myself and root to the group video, as required.

After the reboot, the default VGA console with the big chars
was replaced with a much better-looking vt console, and amdgpu
as well as the firmwares show up in kldstat:

$ kldstat
Id Refs Address            Size     Name
 1   95 0xffffffff80200000 2036448  kernel
 2    1 0xffffffff82239000 af98     aesni.ko
 3    1 0xffffffff82244000 1e0d8    geom_eli.ko
 4    1 0xffffffff82266000 381080   zfs.ko
 5    2 0xffffffff825e8000 a380     opensolaris.ko
 6    1 0xffffffff825f3000 15da0    fuse.ko
 7    1 0xffffffff82609000 89408    vboxdrv.ko
 8    1 0xffffffff82821000 15afa8   amdgpu.ko
 9    1 0xffffffff8297c000 74b70    drm.ko
10    4 0xffffffff829f1000 edc8     linuxkpi.ko
11    3 0xffffffff82a00000 124a8    linuxkpi_gplv2.ko
12    2 0xffffffff82a13000 6b8      debugfs.ko
13    1 0xffffffff82a14000 8148     amdgpu_polaris10_mc_bin.ko
14    1 0xffffffff82a1d000 4400     amdgpu_polaris10_pfp_bin.ko
15    1 0xffffffff82a22000 4400     amdgpu_polaris10_me_bin.ko
16    1 0xffffffff82a27000 2400     amdgpu_polaris10_ce_bin.ko
17    1 0xffffffff82a2a000 5f30     amdgpu_polaris10_rlc_bin.ko
18    1 0xffffffff82a30000 40400    amdgpu_polaris10_mec_bin.ko
19    1 0xffffffff82a71000 40400    amdgpu_polaris10_mec2_bin.ko
20    1 0xffffffff82ab2000 3318     amdgpu_polaris10_sdma_bin.ko
21    1 0xffffffff82ab6000 3320     amdgpu_polaris10_sdma1_bin.ko
22    1 0xffffffff82aba000 5bc00    amdgpu_polaris10_uvd_bin.ko
23    1 0xffffffff82b16000 28d20    amdgpu_polaris10_vce_bin.ko
24    1 0xffffffff82b3f000 1fe40    amdgpu_polaris10_k_smc_bin.ko
25    1 0xffffffff82b5f000 3698     ng_ubt.ko
26    5 0xffffffff82b63000 9a20     netgraph.ko
27    1 0xffffffff82b6d000 8e78     ng_hci.ko
28    3 0xffffffff82b76000 95c      ng_bluetooth.ko
29    1 0xffffffff82b77000 2328     ums.ko
30    1 0xffffffff82b7a000 1780     uhid.ko
31    1 0xffffffff82b7c000 bc0e     ng_l2cap.ko
32    1 0xffffffff82b88000 176a8    ng_btsocket.ko
33    1 0xffffffff82ba0000 1d40     ng_socket.ko

To set up X, I deleted my old xorg.conf, and added

/usr/local/etc/X11/xorg.conf.d/10-amdgpu.conf with this:

Section "Device"
    Identifier "AMD"
    Driver "amdgpu"
    Option "DRI" "3"
    Option "TearFree" "true"
EndSection

That's it.

glxinfo (from graphics/mesa-demos) reports among others:

Extended renderer info (GLX_MESA_query_renderer):
    Vendor: X.Org (0x1002)
    Device: Radeon RX 580 Series (POLARIS10 / DRM 3.10.0 / 11.2-BETA2, LLVM 6.0.0) (0x67df)
    Version: 18.0.4
    Accelerated: yes
    Video memory: 8157MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.5
    Max compat profile version: 3.0
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.1
Memory info (GL_ATI_meminfo):
    VBO free memory - total: 8156 MB, largest block: 8156 MB
    VBO free aux. memory - total: 8189 MB, largest block: 8189 MB
    Texture free memory - total: 8156 MB, largest block: 8156 MB
    Texture free aux. memory - total: 8189 MB, largest block: 8189 MB
    Renderbuffer free memory - total: 8156 MB, largest block: 8156 MB
    Renderbuffer free aux. memory - total: 8189 MB, largest block: 8189 MB
Memory info (GL_NVX_gpu_memory_info):
    Dedicated video memory: 8157 MB
    Total available memory: 16347 MB
    Currently available dedicated video memory: 8156 MB
OpenGL vendor string: X.Org
OpenGL renderer string: Radeon RX 580 Series (POLARIS10 / DRM 3.10.0 / 11.2-BETA2, LLVM 6.0.0)

and glxgears renders at 60 FPS on my 4K LG TV, which looks about right.

What's still not working is sound output via HDMI:

$ cat /dev/sndstat
Installed devices:
pcm0: <ATI R6xx (HDMI)> (play) default
pcm1: <ATI R6xx (HDMI)> (play)
pcm2: <ATI R6xx (HDMI)> (play)
pcm3: <ATI R6xx (HDMI)> (play)
pcm4: <ATI R6xx (HDMI)> (play)
pcm5: <ATI R6xx (HDMI)> (play)
pcm6: <Realtek ALC1220 (Analog 5.1+HP/2.0)> (play/rec)
pcm7: <Realtek ALC1220 (Rear Digital)> (play)
pcm8: <Realtek ALC1220 (Front Analog Mic)> (rec)
No devices installed from userspace.

I tried setting hw.snd.default_unit from 0 to 8, but no
sound via HDMI (sound is working on the analog device though).

I didn't try switching to another HDMI port.

Any ideas?

Thanks,
-cpghost.