Enable full acceleration hardware encoding on AMD RX 460

[zenonos]

Hi, I've problem with my AMD RX 460.
It's recognised under "About this Mac" but it not works properly. Yesterday I tried to benchmark my dGPU with BruceX and It took 1m 20s and the output was glitched ( left half side of the video is totally green ).
MacX Video Converter Pro shows Hardware encoding support YES or NO in base of BIOS settings:

• iGPU: ENABLED
• DVMT: 128MB
• MEM ALLOC: MAX

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• iGPU: AUTO
• DVMT: 64MB
• MEM ALLOC: MAX

Debug files attached below.

 

[macnb]

read this thread fully.

 

[zenonos]

read this thread fully.

I read this.

• AMDRadeonX5000 and AMDRadeonX4250 copied into ~/Desktop/
• AMDRadeonX4250 .plist file edited by adding the same attributes from the first one ( from post #1 thread quoted ).
• AMDRadeonX4250.kext copied into E/C/kexts/other/
• AppleGVA preferences reseted and dyld_shared_cache updated ( from post #25 thread quoted ).
• iGPU disabled from BIOS.

Still not get HW decoding, MacX Video Converter Pro doesn't see HW acceleration or dGPU too.
What's the problem?

 

[zenonos]

Update:
I used the kext provided by shuhung in post #4 ( X4250.kext ) and now HEVC decoding works properly.
But I haven't hardware acceleration in FCPX ( BruceX test 1ms25s ) and Geekbench score is 30K , very bad...

 

[macnb]

I su

Update:
I used the kext provided by shuhung in post #4 ( X4250.kext ) and now HEVC decoding works properly.
But I haven't hardware acceleration in FCPX ( BruceX test 1ms25s ) and Geekbench score is 30K , very bad...

View attachment 319247

I suggest that you post in that thread @shuhung is helping others

 

[zenonos]

I su

I suggest that you post in that thread @shuhung is helping others

Thanks, I posted in that thread.

 

[mitch_de]

Do you use the IGPU as video out device or, like me connector less (means only as accell, no video output)?
For me, using my iGPU (HD4000) connectorless (by i5-3x70K, connectorless ig-id 0x01620007, other GEN IGPU have other ig-ids for connector less!) i must remove IntelGraphicfixup and only use SHIKI.kext. newest SHIKI: https://github.com/vit9696/Shiki/releases , DL + changes
Using IntelGrapicfixup only or in combination IGF+SHIKI does break MacXVideo Accell , means = NO. SHIKI only = YES.

 

[zenonos]

Do you use the IGPU as video out device or, like me connector less (means only as accell, no video output)?
For me, using my iGPU (HD4000) connectorless (by i5-3x70K, connectorless ig-id 0x01620007, other GEN IGPU have other ig-ids for connector less!) i must remove IntelGraphicfixup and only use SHIKI.kext. newest SHIKI: https://github.com/vit9696/Shiki/releases , DL + changes
Using IntelGrapicfixup only or in combination IGF+SHIKI does break MacXVideo Accell , means = NO. SHIKI only = YES.

Hi, thanks for your help.
I enabled the iGPU from BIOS with 64MB DVTM, MAX alloc and set ig-id to 0x19120001 ( theoretically mean connector less for HD530 ) , I removed IntelGraphicfixup and copied shiki.kext on /E/C/kexts/other with -shikigva=4 .
MacX video converter pro shows me HW acceleration supported on Intel HD 530 but VTDecoderXPCService overload CPU .( > 150% ) .

Now, if I disable the iGPU from BIOS ( leave everything as it is before ) and copy the dummy kext for RX460 in /E/C/kexts/other MacX video converter pro shows me HW acceleration supported but there isn't graphics card name ( show as N/A ). In this way decoding HEVC doesn't overload CPU ( VTDecoderXPCService about 3% ) .