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drm/vc4 Broadcom VC4 Graphics Driver

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_drv.c
   :doc: Broadcom VC4 Graphics Driver

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.

Pixel Valve (DRM CRTC)

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_crtc.c
   :doc: VC4 CRTC module

HVS

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_hvs.c
   :doc: VC4 HVS module.

HVS planes

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_plane.c
   :doc: VC4 plane module

HDMI encoder

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_hdmi.c
   :doc: VC4 Falcon HDMI module

DSI encoder

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_dsi.c
   :doc: VC4 DSI0/DSI1 module

DPI encoder

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_dpi.c
   :doc: VC4 DPI module

VEC (Composite TV out) encoder

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_vec.c
   :doc: VC4 SDTV module

KUnit Tests

The VC4 Driver uses KUnit to perform driver-specific unit and integration tests.

These tests are using a mock driver and can be ran using the command below, on either arm or arm64 architectures,

$ ./tools/testing/kunit/kunit.py run \
        --kunitconfig=drivers/gpu/drm/vc4/tests/.kunitconfig \
        --cross_compile aarch64-linux-gnu- --arch arm64
Parts of the driver that are currently covered by tests are:
  • The HVS to PixelValve dynamic FIFO assignment, for the BCM2835-7 and BCM2711.

Memory Management and 3D Command Submission

This section covers the GEM implementation in the vc4 driver.

GPU buffer object (BO) management

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_bo.c
   :doc: VC4 GEM BO management support

V3D binner command list (BCL) validation

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_validate.c
   :doc: Command list validator for VC4.

V3D render command list (RCL) generation

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_render_cl.c
   :doc: Render command list generation

Shader validator for VC4

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_validate_shaders.c
   :doc: Shader validator for VC4.

V3D Interrupts

.. kernel-doc:: drivers/gpu/drm/vc4/vc4_irq.c
   :doc: Interrupt management for the V3D engine