drm/i915: Add microcontrollers documentation section (493065e2) · Commits · 戴 / test

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 <daniele.ceraolospurio@intel.com> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Acked-by:

Anna Karas <anna.karas@intel.com> Reviewed-by:

Martin Peres <martin.peres@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191014183602.3643-1-daniele.ceraolospurio@intel.com

Documentation/gpu/i915.rst

+18 −0

Original line number	Diff line number	Diff line
		@@ -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
		=======

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