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video/aperture: Remove conflicting VGA devices, if any

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On the primary graphics adapter, a driver might conflict with a VGA
driver that controls the VGA framebuffer I/O range. Remove the VGA
driver from the aperture helpers. Until now, this case has been
hendled by fbdev, but it should work even with fbdev disabled.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220718072322.8927-10-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-07-18 09:23:20 +02:00
parent 4652905f4e
commit 482b1c7d47
1 changed files with 12 additions and 2 deletions
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14
drivers/video/aperture.c
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@ -12,6 +12,8 @@
#include <linux/types.h>
#include <linux/vgaarb.h>
#include <video/vga.h>
/**
* DOC: overview
*
@ -300,6 +302,16 @@ int aperture_remove_conflicting_devices(resource_size_t base, resource_size_t si
*/
sysfb_disable();
aperture_detach_devices(base, size);
/*
* If this is the primary adapter, there could be a VGA device
* that consumes the VGA framebuffer I/O range. Remove this device
* as well.
*/
if (primary)
aperture_detach_devices(VGA_FB_PHYS_BASE, VGA_FB_PHYS_SIZE);
#if IS_REACHABLE(CONFIG_FB)
a = alloc_apertures(1);
if (!a)
@ -315,8 +327,6 @@ int aperture_remove_conflicting_devices(resource_size_t base, resource_size_t si
return ret;
#endif
aperture_detach_devices(base, size);
return 0;
}
EXPORT_SYMBOL(aperture_remove_conflicting_devices);