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diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst new file mode 100644 index 000000000000..9c6732123c3c --- /dev/null +++ b/Documentation/gpu/i915.rst @@ -0,0 +1,346 @@ +drm/i915 Intel GFX Driver +========================= + +The drm/i915 driver supports all (with the exception of some very early +models) integrated GFX chipsets with both Intel display and rendering +blocks. This excludes a set of SoC platforms with an SGX rendering unit, +those have basic support through the gma500 drm driver. + +Core Driver Infrastructure +-------------------------- + +This section covers core driver infrastructure used by both the display +and the GEM parts of the driver. + +Runtime Power Management +~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_runtime_pm.c + :doc: runtime pm + +.. kernel-doc:: drivers/gpu/drm/i915/intel_runtime_pm.c + :internal: + +.. kernel-doc:: drivers/gpu/drm/i915/intel_uncore.c + :internal: + +Interrupt Handling +~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_irq.c + :doc: interrupt handling + +.. kernel-doc:: drivers/gpu/drm/i915/i915_irq.c + :functions: intel_irq_init intel_irq_init_hw intel_hpd_init + +.. kernel-doc:: drivers/gpu/drm/i915/i915_irq.c + :functions: intel_runtime_pm_disable_interrupts + +.. kernel-doc:: drivers/gpu/drm/i915/i915_irq.c + :functions: intel_runtime_pm_enable_interrupts + +Intel GVT-g Guest Support(vGPU) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_vgpu.c + :doc: Intel GVT-g guest support + +.. kernel-doc:: drivers/gpu/drm/i915/i915_vgpu.c + :internal: + +Display Hardware Handling +------------------------- + +This section covers everything related to the display hardware including +the mode setting infrastructure, plane, sprite and cursor handling and +display, output probing and related topics. + +Mode Setting Infrastructure +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The i915 driver is thus far the only DRM driver which doesn't use the +common DRM helper code to implement mode setting sequences. Thus it has +its own tailor-made infrastructure for executing a display configuration +change. + +Frontbuffer Tracking +~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_frontbuffer.c + :doc: frontbuffer tracking + +.. kernel-doc:: drivers/gpu/drm/i915/intel_frontbuffer.c + :internal: + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem.c + :functions: i915_gem_track_fb + +Display FIFO Underrun Reporting +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_fifo_underrun.c + :doc: fifo underrun handling + +.. kernel-doc:: drivers/gpu/drm/i915/intel_fifo_underrun.c + :internal: + +Plane Configuration +~~~~~~~~~~~~~~~~~~~ + +This section covers plane configuration and composition with the primary +plane, sprites, cursors and overlays. This includes the infrastructure +to do atomic vsync'ed updates of all this state and also tightly coupled +topics like watermark setup and computation, framebuffer compression and +panel self refresh. + +Atomic Plane Helpers +~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_atomic_plane.c + :doc: atomic plane helpers + +.. kernel-doc:: drivers/gpu/drm/i915/intel_atomic_plane.c + :internal: + +Output Probing +~~~~~~~~~~~~~~ + +This section covers output probing and related infrastructure like the +hotplug interrupt storm detection and mitigation code. Note that the +i915 driver still uses most of the common DRM helper code for output +probing, so those sections fully apply. + +Hotplug +~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_hotplug.c + :doc: Hotplug + +.. kernel-doc:: drivers/gpu/drm/i915/intel_hotplug.c + :internal: + +High Definition Audio +~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_audio.c + :doc: High Definition Audio over HDMI and Display Port + +.. kernel-doc:: drivers/gpu/drm/i915/intel_audio.c + :internal: + +.. kernel-doc:: include/drm/i915_component.h + :internal: + +Panel Self Refresh PSR (PSR/SRD) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_psr.c + :doc: Panel Self Refresh (PSR/SRD) + +.. kernel-doc:: drivers/gpu/drm/i915/intel_psr.c + :internal: + +Frame Buffer Compression (FBC) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_fbc.c + :doc: Frame Buffer Compression (FBC) + +.. kernel-doc:: drivers/gpu/drm/i915/intel_fbc.c + :internal: + +Display Refresh Rate Switching (DRRS) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_dp.c + :doc: Display Refresh Rate Switching (DRRS) + +.. kernel-doc:: drivers/gpu/drm/i915/intel_dp.c + :functions: intel_dp_set_drrs_state + +.. kernel-doc:: drivers/gpu/drm/i915/intel_dp.c + :functions: intel_edp_drrs_enable + +.. kernel-doc:: drivers/gpu/drm/i915/intel_dp.c + :functions: intel_edp_drrs_disable + +.. kernel-doc:: drivers/gpu/drm/i915/intel_dp.c + :functions: intel_edp_drrs_invalidate + +.. kernel-doc:: drivers/gpu/drm/i915/intel_dp.c + :functions: intel_edp_drrs_flush + +.. kernel-doc:: drivers/gpu/drm/i915/intel_dp.c + :functions: intel_dp_drrs_init + +DPIO +~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_reg.h + :doc: DPIO + +CSR firmware support for DMC +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_csr.c + :doc: csr support for dmc + +.. kernel-doc:: drivers/gpu/drm/i915/intel_csr.c + :internal: + +Video BIOS Table (VBT) +~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_bios.c + :doc: Video BIOS Table (VBT) + +.. kernel-doc:: drivers/gpu/drm/i915/intel_bios.c + :internal: + +.. kernel-doc:: drivers/gpu/drm/i915/intel_vbt_defs.h + :internal: + +Memory Management and Command Submission +---------------------------------------- + +This sections covers all things related to the GEM implementation in the +i915 driver. + +Batchbuffer Parsing +~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_cmd_parser.c + :doc: batch buffer command parser + +.. kernel-doc:: drivers/gpu/drm/i915/i915_cmd_parser.c + :internal: + +Batchbuffer Pools +~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_batch_pool.c + :doc: batch pool + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_batch_pool.c + :internal: + +Logical Rings, Logical Ring Contexts and Execlists +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_lrc.c + :doc: Logical Rings, Logical Ring Contexts and Execlists + +.. kernel-doc:: drivers/gpu/drm/i915/intel_lrc.c + :internal: + +Global GTT views +~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_gtt.c + :doc: Global GTT views + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_gtt.c + :internal: + +GTT Fences and Swizzling +~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_fence.c + :internal: + +Global GTT Fence Handling +^^^^^^^^^^^^^^^^^^^^^^^^^ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_fence.c + :doc: fence register handling + +Hardware Tiling and Swizzling Details +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_fence.c + :doc: tiling swizzling details + +Object Tiling IOCTLs +~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_tiling.c + :internal: + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_tiling.c + :doc: buffer object tiling + +Buffer Object Eviction +~~~~~~~~~~~~~~~~~~~~~~ + +This section documents the interface functions for evicting buffer +objects to make space available in the virtual gpu address spaces. Note +that this is mostly orthogonal to shrinking buffer objects caches, which +has the goal to make main memory (shared with the gpu through the +unified memory architecture) available. + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_evict.c + :internal: + +Buffer Object Memory Shrinking +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This section documents the interface function for shrinking memory usage +of buffer object caches. Shrinking is used to make main memory +available. Note that this is mostly orthogonal to evicting buffer +objects, which has the goal to make space in gpu virtual address spaces. + +.. kernel-doc:: drivers/gpu/drm/i915/i915_gem_shrinker.c + :internal: + +GuC +--- + +GuC-specific firmware loader +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_guc_loader.c + :doc: GuC-specific firmware loader + +.. kernel-doc:: drivers/gpu/drm/i915/intel_guc_loader.c + :internal: + +GuC-based command submission +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_guc_submission.c + :doc: GuC-based command submission + +.. kernel-doc:: drivers/gpu/drm/i915/i915_guc_submission.c + :internal: + +GuC Firmware Layout +~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/intel_guc_fwif.h + :doc: GuC Firmware Layout + +Tracing +------- + +This sections covers all things related to the tracepoints implemented +in the i915 driver. + +i915_ppgtt_create and i915_ppgtt_release +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_trace.h + :doc: i915_ppgtt_create and i915_ppgtt_release tracepoints + +i915_context_create and i915_context_free +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_trace.h + :doc: i915_context_create and i915_context_free tracepoints + +switch_mm +~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/i915/i915_trace.h + :doc: switch_mm tracepoint + +.. WARNING: DOCPROC directive not supported: !Cdrivers/gpu/drm/i915/i915_irq.c |