(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 -- 2.36.1
