Support load of media-driver on unsupported platforms

[dvrogozh]

From intel/libva#466

Forwarding a bug report from Debian: libva tries to load media-driver on Penryn. Since that platform is not supported by media-driver, it should not be loaded in this case.

What we need to do:

1. Remove cpu-specific flags from gmmlib build
2. Remove cpu-specific flags from driver build

@sebastinas : fyi

[dvrogozh]

Places in driver which uses specific cpu instructions:

• media-driver/media_driver/linux/common/cm/hal/cm_mem_os.h

  Line 152 in f85a3d9

  if( cpuInstructionLevel >= CPU_INSTRUCTION_LEVEL_SSE4_1 )

• media-driver/media_driver/agnostic/common/cm/cm_mem.h

  Line 565 in f85a3d9

  _mm_storeu_si128( dst128i++,

• media-driver/media_driver/cmake/linux/media_compile_flags_linux.cmake

  Line 43 in f85a3d9

  -msse

[eero-t]

Is there some plan on doing run-time CPU feature detection & conditional SSE/AVX usage, for things where performance matters (such as CPU side format conversions)?

[paulmenzel]

This is also Debian bug report 974772.

I am seeing this on a GM45 device with Pentium Dual-Core CPU T4500.

$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07)
[…]

Any idea, what commit introduced the regression? VLC didn’t crash in the past to my knowledge.

[sebastinas]

@paulmenzel I think you need to install i965-va-driver and remove intel-media-va-driver.

[paulmenzel]

@paulmenzel I think you need to install i965-va-driver and remove intel-media-va-driver.

Yes, thank you. i965-va-driver-shaders is already installed, and MPEG2 decoding is available. (H264 support was never finished.)