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| author | Mathieu Malaterre <malat@debian.org> | 2018-03-12 17:06:54 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2018-03-12 17:06:54 +0100 |
| commit | 069ee21a8234459473b238e65701d2e79c194ec7 (patch) | |
| tree | e282835f69bf4cff8d40a3e6d6631aafab645be0 /drivers/video | |
| parent | video: fbdev: kconfig: Add help text to FB_I810_I2C (diff) | |
| download | linux-069ee21a8234459473b238e65701d2e79c194ec7.tar.xz linux-069ee21a8234459473b238e65701d2e79c194ec7.zip | |
fbdev: Fix loading of module radeonfb on PowerMac
When the linux kernel is build with (typical kernel ship with Debian
installer):
CONFIG_FB=y
CONFIG_FB_OF=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_FB_RADEON=m
The offb driver takes precedence over module radeonfb. It is then
impossible to load the module, error reported is:
[ 96.551486] radeonfb 0000:00:10.0: enabling device (0006 -> 0007)
[ 96.551526] radeonfb 0000:00:10.0: BAR 0: can't reserve [mem 0x98000000-0x9fffffff pref]
[ 96.551531] radeonfb (0000:00:10.0): cannot request region 0.
[ 96.551545] radeonfb: probe of 0000:00:10.0 failed with error -16
This patch reproduce the behavior of the module radeon, so as to make it
possible to load radeonfb when offb is first loaded, see
commit a56f7428d753 ("drm/radeon: Add early unregister of firmware fb's").
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Link: https://bugs.debian.org/826629#57
Link: https://bugzilla.kernel.org/show_bug.cgi?id=119741
Suggested-by: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/aty/radeon_base.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/video/fbdev/aty/radeon_base.c b/drivers/video/fbdev/aty/radeon_base.c index 87608c0b2351..e8594bbaea60 100644 --- a/drivers/video/fbdev/aty/radeon_base.c +++ b/drivers/video/fbdev/aty/radeon_base.c @@ -2255,6 +2255,23 @@ static const struct bin_attribute edid2_attr = { .read = radeon_show_edid2, }; +static int radeon_kick_out_firmware_fb(struct pci_dev *pdev) +{ + struct apertures_struct *ap; + + ap = alloc_apertures(1); + if (!ap) + return -ENOMEM; + + ap->ranges[0].base = pci_resource_start(pdev, 0); + ap->ranges[0].size = pci_resource_len(pdev, 0); + + remove_conflicting_framebuffers(ap, KBUILD_MODNAME, false); + + kfree(ap); + + return 0; +} static int radeonfb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent) @@ -2308,6 +2325,10 @@ static int radeonfb_pci_register(struct pci_dev *pdev, rinfo->fb_base_phys = pci_resource_start (pdev, 0); rinfo->mmio_base_phys = pci_resource_start (pdev, 2); + ret = radeon_kick_out_firmware_fb(pdev); + if (ret) + return ret; + /* request the mem regions */ ret = pci_request_region(pdev, 0, "radeonfb framebuffer"); if (ret < 0) { |