On Wed, 25 August 2010 Colin Watson <cjwatson@xxxxxxxxxxxxx> wrote:
> Split out linearfb from efifb so that boot loaders can program it as a
> simple linear framebuffer on non-EFI systems. This is useful for boot
> loaders with their own graphics drivers, e.g. GRUB 2, since in some
> cases on x86 they can set up non-VESA modes and thus can't program
> vesafb.
>
> efifb is reworked on top of this common code, and it should be possible
> to do the same with some other framebuffer drivers in future.
>
> Signed-off-by: Colin Watson <cjwatson@xxxxxxxxxxxxx>
> Acked-by: Matthew Garrett <mjg@xxxxxxxxxx>
> Cc: Peter Jones <pjones@xxxxxxxxxx>
> ---
> drivers/video/Kconfig | 17 ++-
> drivers/video/Makefile | 1 +
> drivers/video/efifb.c | 222 +----------------------------
> drivers/video/linearfb.c | 332 +++++++++++++++++++++++++++++++++++++++++++
> include/linux/fb.h | 8 +
> include/linux/screen_info.h | 2 +
> 6 files changed, 364 insertions(+), 218 deletions(-)
> create mode 100644 drivers/video/linearfb.c
>
> diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
> index 59c51d9..a7735ec 100644
> --- a/drivers/video/Kconfig
> +++ b/drivers/video/Kconfig
> @@ -721,13 +721,24 @@ config FB_VESA
> You will get a boot time penguin logo at no additional cost. Please
> read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.
>
> -config FB_EFI
> - bool "EFI-based Framebuffer Support"
> - depends on (FB = y) && X86 && EFI
> +config FB_LINEAR
> + bool "Simple linear framebuffer support"
> + depends on FB
> select FB_CFB_FILLRECT
> select FB_CFB_COPYAREA
> select FB_CFB_IMAGEBLIT
^^^^^^^^^^^^^^^^^^^^^^^
> help
> + This is a simple linear frame buffer device driver. It has no
> + hardware-specific programming capability, but must be programmed
> + by the boot loader or by another frame buffer driver.
> +
> + If unsure, say N.
> +
> +config FB_EFI
> + bool "EFI-based Framebuffer Support"
> + depends on (FB = y) && X86 && EFI
> + select FB_LINEAR
^^^^^^^^^^^^^^^^
Has kconfig been adjusted to process select recursively?
If not the selects from FB_LINEAR will have to be copied here.
Bruno
> + help
> This is the EFI frame buffer device driver. If the firmware on
> your platform is EFI 1.10 or UEFI 2.0, select Y to add support for
> using the EFI framebuffer as your console.
> diff --git a/drivers/video/Makefile b/drivers/video/Makefile
> index ddc2af2..ad74d3b 100644
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