[PATCH v2 00/10] drm: Add driver for PowerPC OF displays

[Thomas Zimmermann]

(was: drm: Add driverof PowerPC OF displays)

PowerPC's Open Firmware offers a simple display buffer for graphics
output. Add ofdrm, a DRM driver for the device. As with the existing
simpledrm driver, the graphics hardware is pre-initialized by the
firmware. The driver only provides blitting, no actual DRM modesetting
is possible.

Version 2 of this patchset starts by cleaning up and refactoring
simpledrm, and moving some of the code in a helper library. These
functions are useful for ofdrm as well.

Patch 7 adds ofdrm, which has been significantly reworked since v1.
PCI is now optional and COMPILE_TEST is supported.

Patches 8 to 10 add support for color management. The code has been
taken from fbdev's offb. I have no hardware available for testing the
functionality. Qemu's stdvga apparently does not support gamma tables
in RGB modes. I verified that the color management code is executed
by running Gnome's night-mode settings, but the display's color tone
does not change.

Thomas Zimmermann (10):
  drm/simpledrm: Remove mem field from device structure
  drm/simpledrm: Inline device-init helpers
  drm/simpledrm: Remove pdev field from device structure
  drm/simpledrm: Compute framebuffer stride if not set
  drm/simpledrm: Convert to atomic helpers
  drm/simpledrm: Move some functionality into fwfb helper library
  drm/ofdrm: Add ofdrm for Open Firmware framebuffers
  drm/ofdrm: Add CRTC state
  drm/ofdrm: Add per-model device function
  drm/ofdrm: Support color management

 Documentation/gpu/drm-kms-helpers.rst |   12 +
 MAINTAINERS                           |    3 +
 drivers/gpu/drm/Kconfig               |    6 +
 drivers/gpu/drm/Makefile              |    3 +-
 drivers/gpu/drm/drm_fwfb_helper.c     |  301 ++++++
 drivers/gpu/drm/tiny/Kconfig          |   15 +
 drivers/gpu/drm/tiny/Makefile         |    1 +
 drivers/gpu/drm/tiny/ofdrm.c          | 1301 +++++++++++++++++++++++++
 drivers/gpu/drm/tiny/simpledrm.c      |  588 +++++------
 drivers/video/fbdev/Kconfig           |    1 +
 include/drm/drm_fwfb_helper.h         |   51 +
 11 files changed, 1949 insertions(+), 333 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_fwfb_helper.c
 create mode 100644 drivers/gpu/drm/tiny/ofdrm.c
 create mode 100644 include/drm/drm_fwfb_helper.h

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2.36.1