[PATCH 0/7] stm32mp1: enable simple framebuffer node for splashscreen

[Patrick Delaunay]

Use simple framebuffer node in the Linux kernel device tree
to preserved the resources (clock, memory) used by the stm32 video
driver to display the splashscreen.

See Linux documentation for details:
Documentation/devicetree/bindings/display/simple-framebuffer.yaml

The 3 first commits of the series are cleanup steps:
migration to Kconfig and rename files and function to fdt_simplefb_
(it seems like a good time time as this function is only used today
 in RPI boards)

patch 4 is a preliminary step = add video_is_active function

patch 5 add a new API fdt_simplefb_enable_and_mem_rsv
to activate node and add reserved memory for video memory

patch 6 avoid a issue in kernel when the reserved video memory by
LTDC driver is not aligned with Linux kernel MMU_SECTION_SIZE

patch 7 use this new function in stm32mp1 code for STMicroelectronics
boards when the simple-framebuffer node is present in Linux device tree



Patrick Delaunay (7):
  Convert CONFIG_LCD_DT_SIMPLEFB to Kconfig
  common: rename lcd_simplefb.c file to fdt_simplefb.c
  common: rename functions lcd_dt_simplefb to fdt_simplefb
  video: Add video_is_active function
  common: add fdt_simplefb_enable_and_mem_rsv function
  video: stm32: stm32_ltdc: align framebuffer on 2MB
  board: stm32mp1: enable simple framebuffer node for splashscreen

 board/raspberrypi/rpi/rpi.c               |  2 +-
 board/st/stm32mp1/stm32mp1.c              |  4 +++
 common/Kconfig                            |  9 ++++++
 common/Makefile                           |  2 +-
 common/{lcd_simplefb.c => fdt_simplefb.c} | 37 ++++++++++++++++++++---
 configs/rpi_0_w_defconfig                 |  1 +
 configs/rpi_2_defconfig                   |  1 +
 configs/rpi_3_32b_defconfig               |  1 +
 configs/rpi_3_b_plus_defconfig            |  1 +
 configs/rpi_3_defconfig                   |  1 +
 configs/rpi_4_32b_defconfig               |  1 +
 configs/rpi_4_defconfig                   |  1 +
 configs/rpi_arm64_defconfig               |  1 +
 configs/rpi_defconfig                     |  1 +
 configs/stm32mp15_basic_defconfig         |  1 +
 configs/stm32mp15_defconfig               |  1 +
 configs/stm32mp15_trusted_defconfig       |  1 +
 drivers/video/stm32/stm32_ltdc.c          |  5 ++-
 drivers/video/video-uclass.c              | 14 +++++++++
 include/configs/rpi.h                     |  1 -
 include/fdt_simplefb.h                    |  5 +--
 include/video.h                           |  7 +++++
 scripts/config_whitelist.txt              |  1 -
 23 files changed, 87 insertions(+), 12 deletions(-)
 rename common/{lcd_simplefb.c => fdt_simplefb.c} (65%)

-- 
2.25.1