From: Daniele Ceraolo Spurio Date: Mon, 14 Oct 2019 18:36:00 +0000 (-0700) Subject: drm/i915: Add microcontrollers documentation section X-Git-Tag: v5.5-rc1~128^2~30^2~41 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=493065e24eb13cf1e974ef9fc0185d6266d16067;p=thirdparty%2Fkernel%2Flinux.git drm/i915: Add microcontrollers documentation section To better organize the information, add a microcontrollers section and move/link the GuC, HuC and DMC documentation under it. Also add a small intro. Signed-off-by: Daniele Ceraolo Spurio Cc: Michal Wajdeczko Acked-by: Anna Karas Reviewed-by: Martin Peres Link: https://patchwork.freedesktop.org/patch/msgid/20191014183602.3643-1-daniele.ceraolospurio@intel.com --- diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst index 465779670fd4f..f1bae7867045d 100644 --- a/Documentation/gpu/i915.rst +++ b/Documentation/gpu/i915.rst @@ -415,6 +415,15 @@ Object Tiling IOCTLs .. kernel-doc:: drivers/gpu/drm/i915/gem/i915_gem_tiling.c :doc: buffer object tiling +Microcontrollers +================ + +Starting from gen9, three microcontrollers are available on the HW: the +graphics microcontroller (GuC), the HEVC/H.265 microcontroller (HuC) and the +display microcontroller (DMC). The driver is responsible for loading the +firmwares on the microcontrollers; the GuC and HuC firmwares are transferred +to WOPCM using the DMA engine, while the DMC firmware is written through MMIO. + WOPCM ----- @@ -454,6 +463,15 @@ GuC Address Space .. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_guc.c :doc: GuC Address Space +HuC +--- +.. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c + :doc: HuC Firmware + +DMC +--- +See `CSR firmware support for DMC`_ + Tracing =======