diff options
| author | Karol Herbst <kherbst@redhat.com> | 2020-04-28 19:54:03 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2020-05-22 04:13:50 +0300 |
| commit | 51c05340e407b14b7d8ca5c6ad7027f269fc617b (patch) | |
| tree | dd6d76897863257d567a6666cdfca3cbe8f7f899 /drivers/gpu/drm/nouveau | |
| parent | 24d5ff40a732633dceab68c6559ba723784f4a68 (diff) | |
| download | linux-51c05340e407b14b7d8ca5c6ad7027f269fc617b.tar.xz | |
drm/nouveau/device: detect if changing endianness failed
v2: relax the checks a little
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/device/base.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c index 37589f36546d..c732074bf790 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c @@ -2924,6 +2924,20 @@ nvkm_device_del(struct nvkm_device **pdevice) } } +static inline bool +nvkm_device_endianness(void __iomem *pri) +{ + u32 boot1 = ioread32_native(pri + 0x000004) & 0x01000001; +#ifdef __BIG_ENDIAN + if (!boot1) + return false; +#else + if (boot1) + return false; +#endif + return true; +} + int nvkm_device_ctor(const struct nvkm_device_func *func, const struct nvkm_device_quirk *quirk, @@ -2973,13 +2987,15 @@ nvkm_device_ctor(const struct nvkm_device_func *func, /* identify the chipset, and determine classes of subdev/engines */ if (detect) { /* switch mmio to cpu's native endianness */ -#ifndef __BIG_ENDIAN - if (ioread32_native(map + 0x000004) != 0x00000000) { -#else - if (ioread32_native(map + 0x000004) == 0x00000000) { -#endif + if (!nvkm_device_endianness(map)) { iowrite32_native(0x01000001, map + 0x000004); ioread32_native(map); + if (!nvkm_device_endianness(map)) { + nvdev_error(device, + "GPU not supported on big-endian\n"); + ret = -ENOSYS; + goto done; + } } /* read boot0 and strapping information */ |