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Edit README #1725

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Sep 25, 2023
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Edit README #1725

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5e3ef79
[README] Change "Coffe Lake" to "Coffee Lake"
martey Sep 24, 2023
7d88f3a
[README] Edit HuC firmware section
martey Sep 24, 2023
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22 changes: 11 additions & 11 deletions README.md
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Expand Up @@ -76,7 +76,7 @@ export LIBVA_DRIVER_NAME=iHD
- BDW (Broadwell)
- SKL (Skylake)
- BXTx (BXT: Broxton, APL: Apollo Lake, GLK: Gemini Lake)
- KBLx (KBL: Kaby Lake, CFL: Coffe Lake, WHL: Whiskey Lake, CML: Comet Lake, AML: Amber Lake)
- KBLx (KBL: Kaby Lake, CFL: Coffee Lake, WHL: Whiskey Lake, CML: Comet Lake, AML: Amber Lake)
- ICL (Ice Lake)
- JSL (Jasper Lake) / EHL (Elkhart Lake)
- TGLx (TGL: Tiger Lake, RKL: Rocket Lake, ADL-S/P/N: Alder Lake, RPL-S/P: Raptor Lake)
Expand Down Expand Up @@ -199,17 +199,17 @@ or later, which officially supported C++11.

2. SKL: Green or other incorrect color will be observed in output frames when using YV12/I420 as input format for csc/scaling/blending/rotation, etc. on Ubuntu 16.04 stock (with kernel 4.10). The issue can be addressed with the kernel patch: [WaEnableYV12BugFixInHalfSliceChicken7](https://cgit.freedesktop.org/drm-tip/commit/?id=0b71cea29fc29bbd8e9dd9c641fee6bd75f68274)

3. HuC firmware is necessary for AVC/HEVC/VP9/AV1 low power encoding bitrate control, including CBR, VBR, etc. The [default Kernel configuration](https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/i915/gt/uc/intel_uc.c#L21) didn't enable Huc loading for TGL/RKL and legacy platforms but enabled it from ADL+ platforms. You could change Huc setting by ```"options i915 enable_guc=2" > /etc/modprobe.d/i915.conf``` under root. For ADL+ platforms, Kernel loads Huc as default if [related platform Huc binary](https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915) exist in ```/lib/firware/i915```. You could see the Huc firmwares are avaiable from below kernel versions for different platforms:
- APL/KBL: starting from Kernal 4.11, Huc loading is disabled as default so need to set `i915.enable_guc=2`
- CFL: starting from Kernal 4.15, Huc loading is disabled as default so need to set `i915.enable_guc=2`
- ICL: starting from Kernal 5.2, Huc loading is disabled as default so need to set `i915.enable_guc=2`
- EHL/JSL: starting from Kernal 5.8, Huc loading is disabled as default so need to set `i915.enable_guc=2`
- TGL: starting from Kernal 5.9, Huc loading is disabled as default so need to set `i915.enable_guc=2`
- RKL: starting from Kernal 5.17, Huc loading is disabled as default so need to set `i915.enable_guc=2`
- ADL-S/ADL-P: starting from Kernal 5.17
- ADL-N/RPL-S/RPL-P: starting from Kernal 6.2
3. HuC firmware is necessary for AVC/HEVC/VP9/AV1 low power encoding bitrate control, including CBR, VBR, etc. The [default kernel configuration](https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/i915/gt/uc/intel_uc.c#L21) didn't enable HuC loading for TGL/RKL and legacy platforms but enabled it from ADL+ platforms. You could change the HuC setting with ```"options i915 enable_guc=2" > /etc/modprobe.d/i915.conf``` under root. For ADL+ platforms, the kernel loads HuC as default if the [related platform HuC binary](https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915) exists in ```/lib/firware/i915```. The HuC firmwares available on different platforms are:
- APL/KBL: starting from kernel 4.11, HuC loading is disabled as default, so set `i915.enable_guc=2`
- CFL: starting from kernel 4.15, HuC loading is disabled as default, so set `i915.enable_guc=2`
- ICL: starting from kernel 5.2, HuC loading is disabled as default, so set `i915.enable_guc=2`
- EHL/JSL: starting from kernel 5.8, HuC loading is disabled as default, so set `i915.enable_guc=2`
- TGL: starting from kernel 5.9, HuC loading is disabled as default, so set `i915.enable_guc=2`
- RKL: starting from kernel 5.17, HuC loading is disabled as default, so set `i915.enable_guc=2`
- ADL-S/ADL-P: starting from kernel 5.17
- ADL-N/RPL-S/RPL-P: starting from kernel 6.2
- DG1/SG1: [intel-gpu/intel-gpu-i915-backports](https://github.com/intel-gpu/intel-gpu-i915-backports)
- Alchemist(DG2): starting from Kernal 6.2
- Alchemist(DG2): starting from kernel 6.2
- ATSM: [intel-gpu/intel-gpu-i915-backports](https://github.com/intel-gpu/intel-gpu-i915-backports)

4. Other more known issues, please refer to [media-driver/wiki](https://github.com/intel/media-driver/wiki) "Known Issues" pages.
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