[PATCH v2 0/6] video/logo: allow custom boot logo and simplify logic

[Vincent Mailhol <mailhol@kernel.org>]

This series allows the user to replace the default kernel boot logo by
a custom one directly in the kernel configuration. This makes it
easier to customise the boot logo without the need to modify the
sources and allows such customisation to remain persistent after
applying the configuration to another version of the kernel.

Patch #1 and #2 are clean-up and preparation while patch #3 is the
main feature of this series: making the boot logo customisable.

While working on this, I realised that managing the logo file directly
in Kbuild allows us to simplify how we handle the different existing
variants of the Tux logo. This series thus ends with a clean-up which
moves all the logo selection logic to Kbuild except from one special
case (details in the patch description), simplifying the Makefile and
the C code.

Patch #4 and #5 do a tree-wide clean-up on the Kconfig symbols that
are to be removed in patch #6 and patch #6 simplify the logic as
explained above.

Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
---
Changes in v2:

  - By removing the logo_spe_clut224.o target from the Makefile, v1
    also removed the logo_spe_clut224 object which is still being
    referenced in

      arch/powerpc/platforms/cell/spu_base.c

    Restore the logo_spe_clut224.o target.

Link to v1: https://lore.kernel.org/r/20251230-custom-logo-v1-0-4736374569ee@kernel.org

---
Vincent Mailhol (6):
      video/logo: remove orphan .pgm Makefile rule
      video/logo: add a type parameter to the logo makefile function
      video/logo: allow custom logo
      newport_con: depend on LOGO_LINUX_CLUT224 instead of LOGO_SGI_CLUT224
      sh: defconfig: remove CONFIG_LOGO_SUPERH_*
      video/logo: move logo selection logic to Kconfig

 arch/sh/configs/dreamcast_defconfig      |  2 -
 arch/sh/configs/ecovec24_defconfig       |  2 -
 arch/sh/configs/kfr2r09_defconfig        |  2 -
 arch/sh/configs/migor_defconfig          |  2 -
 arch/sh/configs/rts7751r2d1_defconfig    |  2 -
 arch/sh/configs/rts7751r2dplus_defconfig |  2 -
 arch/sh/configs/se7724_defconfig         |  2 -
 arch/sh/configs/se7780_defconfig         |  2 -
 arch/sh/configs/sh7785lcr_defconfig      |  3 --
 arch/sh/configs/urquell_defconfig        |  3 --
 drivers/video/console/newport_con.c      |  4 +-
 drivers/video/logo/Kconfig               | 83 ++++++++++++++++++--------------
 drivers/video/logo/Makefile              | 27 +++++------
 drivers/video/logo/logo.c                | 46 ++----------------
 include/linux/linux_logo.h               |  8 ---
 15 files changed, 63 insertions(+), 127 deletions(-)
---
base-commit: b69053dd3ffbc0d2dedbbc86182cdef6f641fe1b
change-id: 20251227-custom-logo-932df316a02c

Best regards,
-- 
Vincent Mailhol <mailhol@kernel.org>