[v2,1/3] drm/i915: Add microcontrollers documentation section
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Message ID 20191010010214.11591-1-daniele.ceraolospurio@intel.com
State New
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  • [v2,1/3] drm/i915: Add microcontrollers documentation section
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Commit Message

Daniele Ceraolo Spurio Oct. 10, 2019, 1:02 a.m. UTC
To better organize the information, add a microcontrollers section and
move/link the GuC, HuC and DMC documentation under it. Also add a small

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>
 Documentation/gpu/i915.rst | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

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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
+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.
@@ -454,6 +463,15 @@  GuC Address Space
 .. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_guc.c
    :doc: GuC Address Space
+.. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
+   :doc: HuC Firmware
+See `CSR firmware support for DMC`_