- intel igpu related - remove i915drmfb hacks and use simplefb and libgfxinit enabled fb
- coreboot 4.19: add patch to fix https://ticket.coreboot.org/issues/500. fbwhiptail still tears screen if in native 1366x769 though
- coreboot 4.19: add patch to enable linux tampoline handle coreboot framebuffer (merged https://review.coreboot.org/c/coreboot/+/76431)
- coreboot 4.19: add patch to enable coreboot to apply jpeg voodoo to create bootsplash.jpeg injected in cbfs at build time + CircleCI apt imagemagick
- (Thanks Nico Huber @icon again for above patches!)
- coreboot configs: adapt VESAFB/LIBGFXINIT to use maximum fb height/width
- coreboot configs for iGPU only: CONFIG_LINEAR_FRAMEBUFFER_MAX_HEIGHT CONFIG_LINEAR_FRAMEBUFFER_MAX_WIDTH to native size
- coreboot configs for dGPU based on Optional VBIOS injected: VESAFB set to 1280x1024 (maximum possible).
Details:
coreboot configs: remove CONFIG_LINUX_COMMAND_LINE="drm_kms_helper.drm_leak_fbdev_smem=1 i915.enable_fbc=0"
- Those were needed to expose i915drmfb driver prior of efifb working.
Remove CONFIG_NO_GFX_INIT from configs having CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE=y
Add CONFIG_BOOTSPLASH_IMAGE from configs having CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE=y
Add CONFIG_LINEAR_FRAMEBUFFER from configs having CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE=y
Set BOOTSPLASH parameters to match bootsplash and jpeg requirements
+CONFIG_LINEAR_FRAMEBUFFER_MAX_HEIGHT=768
+CONFIG_LINEAR_FRAMEBUFFER_MAX_WIDTH=1024
+CONFIG_BOOTSPLASH=y
Others paramaters defined per board default setting with coreboot.save_oldconfig_in_place helper
- add additional kernel boot params for i915 where needed:
- adds : drm_kms_helper.drm_leak_fbdev_smem=1 i915.enable_fbc=0 ( to permit kexec into vesa fb of kexec'ed kernel for i915 driven gpus without framebuffer compression, leaking smem fbdev address for kexec to pickup )
The calculations outlined at https://github.com/osresearch/heads/pull/1282#discussion_r1072473677
Sums to having 'ifdtool -f layout.txt ifd_shrinked.bin && cat layout.txt'
The example for T440p:
00000000:00000fff fd
00021000:00bfffff bios
00003000:00020fff me
00001000:00002fff gbe
Here: 00bfffff-00021000=BDEFFF
Which is exact result of @rbeslow's calculations.
There is an issue on haswell, maybe because of car, maybe because of non native memory init blob.
But this is not the case for xx20/xx30 boards.
This makes configs much less dependent on directory layout.
As of this commit the following variables are supported:
* @BOARD_BUILD_DIR@ - absolute path under build/
* @BLOB_DIR@ - absolute path to blobs/
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
