[PATCH 04/18] video: bochs: Avoid using IO instructions to access VGA IO port

Anatolij Gustschin agust at denx.de
Tue Aug 1 14:59:35 CEST 2023


On Sun, 23 Jul 2023 12:40:27 +0800
Bin Meng bmeng at tinylab.org wrote:

> At present the driver uses IO instructions to access the legacy
> VGA IO ports, which unfortunately limits the driver to work only
> on x86. It turns out the IO instruction is not necessary as Bochs
> VGA card remaps the legacy VGA IO ports (0x3c0 -> 0x3df) to its
> memory mapped register space from offset 0x400.
> 
> Update the driver to use MMIO access for VGA IO port.
> 
> Signed-off-by: Bin Meng <bmeng at tinylab.org>
> ---
> 
>  drivers/video/bochs.c | 6 +++---
>  drivers/video/bochs.h | 4 +---
>  2 files changed, 4 insertions(+), 6 deletions(-)

applied to u-boot-video/master, thanks!

--
Anatolij


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