[RESEND,v4,v4,0/4] drm/vc4: Use the firmware to stop the display pipeline

Message

Maxime Ripard Dec. 13, 2021, 4:26 p.m. UTC

Hi,

The VC4 driver has had limited support to disable the HDMI controllers and
pixelvalves at boot if the firmware has enabled them.

However, this proved to be limited, and a bit unreliable so a new firmware
command has been introduced some time ago to make it free all its resources and
disable any display output it might have enabled.

This series takes advantage of that command to call it once the transition from
simplefb to the KMS driver has been done.

Let me know what you think,
Maxime

---

Changes from v3:
  - Support nomodeset

Changes from v2:
  - Switch back to rpi_firmware_get / rpi_firmware_put
  - Moved the rpi_firmware pointer to a local variable

Changes from v1:
  - Use of_find_compatible_node instead of a phandle
  - Use devm_rpi_firmware_get

Maxime Ripard (4):
  firmware: raspberrypi: Add RPI_FIRMWARE_NOTIFY_DISPLAY_DONE
  drm/vc4: Support nomodeset
  drm/vc4: Remove conflicting framebuffers before callind bind_all
  drm/vc4: Notify the firmware when DRM is in charge

 drivers/gpu/drm/vc4/vc4_drv.c              | 50 ++++++++++++++++++----
 include/soc/bcm2835/raspberrypi-firmware.h |  1 +
 2 files changed, 42 insertions(+), 9 deletions(-)