The hardware acceleration of rx550 is limited to h264 and fullhd at 30fps.
you mean encoding? It can do 4k just slooowly .... (in cingg)
Decoding 4k 10bit hevc works via vaapi/mpv (0.37 git)
mplayer show fast green image via vdpau ;)
On normal 8bit h264 mplayer's vdpau works ok, my display just 1440*900 but file itself can be FHD 60 fps (from YouTube).
Rx 550 is one of problem-free VGA card on Linux)). Free drivers are very stable.
It still has enough power to run some 3d games, I run dagor engine demo 50+ fps with fullhd resolution.
Best regards,
Andrey
With some kind of HDMI (1.4) to VGA adapter
bash-5.1$ inxi -Gxi
Graphics:
Device-1: AMD Lexa PRO [Radeon 540/540X/550/550X / RX 540X/550/550X]
vendor: ASRock driver: amdgpu v: kernel bus-ID: 01:00.0
Display: server: X.Org 1.21.1.99 driver: loaded: amdgpu
resolution: 1440x900~60Hz
OpenGL: renderer: AMD Radeon RX 550 / 550 Series (radeonsi polaris12 ACO
DRM 3.49 6.1.44-x64)
v: 4.6 Mesa 25.2.0-devel (git-cd8d8ca795) direct render: Yes
vainfo
Trying display: wayland
Trying display: x11
vainfo: VA-API version: 1.19 (libva 2.19.0)
vainfo: Driver version: Mesa Gallium driver 25.2.0-devel for AMD
Radeon RX 550 / 550 Series (radeonsi, polaris12, ACO, DRM 3.49,
6.1.44-x64)
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileVC1Simple : VAEntrypointVLD
VAProfileVC1Main : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSlice
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSlice
VAProfileHEVCMain : VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointEncSlice
VAProfileHEVCMain10 : VAEntrypointVLD
VAProfileJPEGBaseline : VAEntrypointVLD
VAProfileNone : VAEntrypointVideoProc
bash-5.1$ clpeak
Platform: rusticl
Device: AMD Radeon RX 550 / 550 Series (radeonsi, polaris12, ACO,
DRM 3.49, 6.1.44-x64)
Driver version : 25.2.0-devel (git-cd8d8ca795) (Linux x86)
Compute units : 8
Clock frequency : 1183 MHz
Global memory bandwidth (GBPS)
float : 75.30
float2 : 76.62
float4 : 80.28
float8 : 81.12
float16 : 78.93
Single-precision compute (GFLOPS)
float : 1188.83
float2 : 1187.27
float4 : 1182.98
float8 : 1174.67
float16 : 1157.09
No half precision support! Skipped
No double precision support! Skipped
Integer compute (GIOPS)
int : 240.17
int2 : 240.10
int4 : 240.01
int8 : 239.80
int16 : 239.45
Integer compute Fast 24bit (GIOPS)
int : 595.16
int2 : 594.82
int4 : 594.37
int8 : 593.12
int16 : 590.84
Transfer bandwidth (GBPS)
enqueueWriteBuffer : 3.38
enqueueReadBuffer : 1.44
enqueueWriteBuffer non-blocking : 3.39
enqueueReadBuffer non-blocking : 1.45
enqueueMapBuffer(for read) : 2.67
memcpy from mapped ptr : 3.53
enqueueUnmap(after write) : 3.29
memcpy to mapped ptr : 3.48
Kernel launch latency : 90.27 us
bash-5.1$
So, mpv plays 4k HDR file from iPhone11 smoothly (finally!)
CinGG only can do 15 fps on this file :( (8bit RGBA project, x11 output)
Encoding into 8bit HEVC also work:
bash-5.1$ mediainfo /dev/shm/vaapi-test.mp4
General
Complete name : /dev/shm/vaapi-test.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/mp41)
File size : 132 MiB
Duration : 19 s 158 ms
Overall bit rate : 57.7 Mb/s
Frame rate : 59.940 FPS
Writing application : Lavf61.1.100
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L5@Main
Codec ID : hev1
Codec ID/Info : High Efficiency Video Coding
Duration : 19 s 153 ms
Bit rate : 57.6 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.116
Stream size : 132 MiB (100%)
Color range : Full
Matrix coefficients : BT.709
Codec configuration box : hvcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 19 s 158 ms
Source duration : 19 s 179 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 300 KiB (0%)
Source stream size : 300 KiB (0%)
Language : Russian
Default : Yes
Alternate group : 1
but encoding still was done in seven minutes for 20 seconds test clip
(no tonemap either)
So I guess my machine seriosly bootlenecked by PCIe speeds/memory speeds?
bash-5.1$ dmesg | grep amdgpu
[ 9.887359] [drm] amdgpu kernel modesetting enabled.
[ 9.887485] amdgpu: CRAT table not found
[ 9.887527] amdgpu: Virtual CRAT table created for CPU
[ 9.887583] amdgpu: Topology: Add CPU node
[ 9.888699] amdgpu 0000:01:00.0: No more image in the PCI ROM
[ 9.889843] amdgpu 0000:01:00.0: amdgpu: Fetched VBIOS from ROM BAR
[ 9.889886] amdgpu: ATOM BIOS: 113-EXT-700004_L01
[ 9.890070] amdgpu 0000:01:00.0: vgaarb: deactivate vga console
[ 9.893944] amdgpu 0000:01:00.0: amdgpu: Trusted Memory Zone (TMZ)
feature not supported
[ 9.893950] amdgpu 0000:01:00.0: amdgpu: PCIE atomic ops is not supported
[ 10.064640] amdgpu 0000:01:00.0: amdgpu: VRAM: 4096M
0x000000F400000000 - 0x000000F4FFFFFFFF (4096M used)
[ 10.064655] amdgpu 0000:01:00.0: amdgpu: GART: 256M
0x000000FF00000000 - 0x000000FF0FFFFFFF
[ 10.064725] [drm] amdgpu: 4096M of VRAM memory ready
[ 10.064729] [drm] amdgpu: 7998M of GTT memory ready.
[ 10.143106] amdgpu: hwmgr_sw_init smu backed is polaris10_smu
[ 10.572632] snd_hda_intel 0000:01:00.1: bound 0000:01:00.0 (ops
amdgpu_dm_audio_component_bind_ops [amdgpu])
[ 10.754610] kfd kfd: amdgpu: skipped device 1002:699f, PCI rejects
atomics 730<0
[ 10.754630] amdgpu 0000:01:00.0: amdgpu: SE 2, SH per SE 1, CU per
SH 5, active_cu_number 8
[ 10.758061] amdgpu 0000:01:00.0: amdgpu: Using BACO for runtime pm
[ 10.758456] [drm] Initialized amdgpu 3.49.0 20150101 for
0000:01:00.0 on minor 0
[ 10.765104] fbcon: amdgpudrmfb (fb0) is primary device
[ 10.838142] amdgpu 0000:01:00.0: [drm] fb0: amdgpudrmfb frame buffer device
bash-5.1$ dmesg | grep PCIe
[ 0.364217] acpi PNP0A03:00: _OSC: platform does not support
[PCIeHotplug SHPCHotplug PME LTR]
[ 0.364477] acpi PNP0A03:00: _OSC: OS now controls [AER PCIeCapability]
[ 0.376895] pci 0000:01:00.0: 32.000 Gb/s available PCIe bandwidth,
limited by 5.0 GT/s PCIe x8 link at 0000:00:02.0 (capable of 63.008
Gb/s with 8.0 GT/s PCIe x8 link)
Hm, 32 Gb/s should be enough for many 4k streams?
4k ~= 8Kpix, 8*60 = 480Mpix/sec
4 byte/per pixel (30 bit for 10 bpc colors, 2 padding) still just 2Gb/s!
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