Commit 72a6a3e0 authored by Thomas Zimmermann's avatar Thomas Zimmermann

fbdev: Acquire framebuffer apertures for firmware devices

When registering a generic framebuffer, automatically acquire ownership
of the framebuffer's I/O range. The device will now be handled by the
aperture helpers. Fbdev-based conflict handling is no longer required.

v2:
	* use fb_ prefix instead of fbm_ (Javier)
Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: default avatarJavier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220718072322.8927-11-tzimmermann@suse.de
parent 482b1c7d
......@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/aperture.h>
#include <linux/compat.h>
#include <linux/types.h>
#include <linux/errno.h>
......@@ -1751,6 +1752,32 @@ static void do_unregister_framebuffer(struct fb_info *fb_info)
put_fb_info(fb_info);
}
static int fb_aperture_acquire_for_platform_device(struct fb_info *fb_info)
{
struct apertures_struct *ap = fb_info->apertures;
struct device *dev = fb_info->device;
struct platform_device *pdev;
unsigned int i;
int ret;
if (!ap)
return 0;
if (!dev_is_platform(dev))
return 0;
pdev = to_platform_device(dev);
for (ret = 0, i = 0; i < ap->count; ++i) {
ret = devm_aperture_acquire_for_platform_device(pdev, ap->ranges[i].base,
ap->ranges[i].size);
if (ret)
break;
}
return ret;
}
/**
* remove_conflicting_framebuffers - remove firmware-configured framebuffers
* @a: memory range, users of which are to be removed
......@@ -1801,6 +1828,12 @@ register_framebuffer(struct fb_info *fb_info)
{
int ret;
if (fb_info->flags & FBINFO_MISC_FIRMWARE) {
ret = fb_aperture_acquire_for_platform_device(fb_info);
if (ret)
return ret;
}
mutex_lock(&registration_lock);
ret = do_register_framebuffer(fb_info);
mutex_unlock(&registration_lock);
......
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