[PATCH v6 0/3] GUD USB Display driver

[Noralf Trønnes]

Hi,

A while back I had the idea to turn a Raspberry Pi Zero into a $5
USB to HDMI/SDTV/DPI display adapter.

The protocol is open so people are free to make displays implementing it and
use this driver, all that's needed is to add a USB vid:pid to the driver for
the display.

See the wiki[1] for more information and images for the Raspberry Pi Zero/4.

Changes in this version:
- Use obj-y in Makefile (Peter)
- Fix missing le32_to_cpu() when using GUD_DISPLAY_MAGIC (Peter)
- Set initial brightness on backlight device


Noralf.

[1] https://github.com/notro/gud/wiki


Noralf Trønnes (3):
  drm/uapi: Add USB connector type
  drm/probe-helper: Check epoch counter in output_poll_execute()
  drm: Add GUD USB Display driver

 MAINTAINERS                         |   8 +
 drivers/gpu/drm/Kconfig             |   2 +
 drivers/gpu/drm/Makefile            |   1 +
 drivers/gpu/drm/drm_connector.c     |   1 +
 drivers/gpu/drm/drm_probe_helper.c  |   7 +-
 drivers/gpu/drm/gud/Kconfig         |  14 +
 drivers/gpu/drm/gud/Makefile        |   4 +
 drivers/gpu/drm/gud/gud_connector.c | 738 ++++++++++++++++++++++++++++
 drivers/gpu/drm/gud/gud_drv.c       | 625 +++++++++++++++++++++++
 drivers/gpu/drm/gud/gud_internal.h  | 149 ++++++
 drivers/gpu/drm/gud/gud_pipe.c      | 475 ++++++++++++++++++
 include/drm/gud.h                   | 356 ++++++++++++++
 include/uapi/drm/drm_mode.h         |   1 +
 13 files changed, 2380 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/gud/Kconfig
 create mode 100644 drivers/gpu/drm/gud/Makefile
 create mode 100644 drivers/gpu/drm/gud/gud_connector.c
 create mode 100644 drivers/gpu/drm/gud/gud_drv.c
 create mode 100644 drivers/gpu/drm/gud/gud_internal.h
 create mode 100644 drivers/gpu/drm/gud/gud_pipe.c
 create mode 100644 include/drm/gud.h

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2.23.0