On Tue, Nov 25, 2025 at 06:20:00PM +0800, ZhangZhiJie wrote:
On 2025/11/25 18:13, Jani Nikula wrote:
On Tue, 25 Nov 2025, ZhangZhiJie <[email protected]> wrote:
On 2025/11/24 20:24, Jani Nikula wrote:
On Mon, 24 Nov 2025, zhangzhijie <[email protected]> wrote:
inb/outb speccial wire not support on other ARCH.
Should detect whether arch platform support or not.
Seems to me it inb/outb depend on CONFIG_HAS_IOPORT. Which arch are you
talking about specifically?
riscv , has CONFIG_HAS_IOPORT. is using for serial, GPIO., etc.
What is the actual failure mode you see?
Does it build?
BR,
Jani.
Yes, i compiled Xe driver, and it's occured load access fault when not
disable VGA_SEQ_*.
can found this link
https://github.com/geerlingguy/raspberry-pi-pcie-devices/issues/510#issuecomment-3383284831
and this is what I tested with rpi:
https://lore.kernel.org/intel-xe/[email protected]/
not sure why you are changing the intel_vga_disable() function: out of
reset that bit is disabled and the function does nothing:
tmp = intel_de_read(display, vga_reg);
if (tmp & VGA_DISP_DISABLE)
return;
If there's no VGA, no bios, then there isn't anything enabling that and
we don't need to disable it.
I have a patch that moves the vga access to a separate function,
intel_vga_set_screen_off(), but that's mostly for clarity, not to fix
anything. If later we want to add an ifdef then we'd probably have to
implement the alternative.
Also note that not having CONFIG_HAS_IOPORT doesn't mean inb()/outb()
are not implemented. See arch/{arm,powerpc,sparc}/include/asm/io.h
for a few variants.
Lucas De Marchi
