From 493065e24eb13cf1e974ef9fc0185d6266d16067 Mon Sep 17 00:00:00 2001 From: Daniele Ceraolo Spurio Date: Mon, 14 Oct 2019 11:36:00 -0700 Subject: 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 --- Documentation/gpu/i915.rst | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'Documentation/gpu') diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst index 465779670fd4..f1bae7867045 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 ======= -- cgit v1.2.3