From a2ac09a03d2a0306eb584192b2a5d6c2aeb265ad Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Thu, 9 May 2019 16:48:50 +1000 Subject: [PATCH] drm/nouveau/core: allow detected chipset to be overridden Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_drm.c | 3 ++- .../gpu/drm/nouveau/nvkm/engine/device/base.c | 24 +++++++++++++++++-- 2 files changed, 24 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 22cd45845e07..7c2fcaba42d6 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -631,7 +631,8 @@ static int nouveau_drm_probe(struct pci_dev *pdev, /* We need to check that the chipset is supported before booting * fbdev off the hardware, as there's no way to put it back. */ - ret = nvkm_device_pci_new(pdev, NULL, "error", true, false, 0, &device); + ret = nvkm_device_pci_new(pdev, nouveau_config, "error", + true, false, 0, &device); if (ret) return ret; diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c index 7971096b6767..159a9f83c05e 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c @@ -2824,8 +2824,8 @@ nvkm_device_ctor(const struct nvkm_device_func *func, u64 mmio_base, mmio_size; u32 boot0, strap; void __iomem *map; - int ret = -EEXIST; - int i; + int ret = -EEXIST, i; + unsigned chipset; mutex_lock(&nv_devices_mutex); if (nvkm_device_find_locked(handle)) @@ -2870,6 +2870,26 @@ nvkm_device_ctor(const struct nvkm_device_func *func, strap = ioread32_native(map + 0x101000); iounmap(map); + /* chipset can be overridden for devel/testing purposes */ + chipset = nvkm_longopt(device->cfgopt, "NvChipset", 0); + if (chipset) { + u32 override_boot0; + + if (chipset >= 0x10) { + override_boot0 = ((chipset & 0x1ff) << 20); + override_boot0 |= 0x000000a1; + } else { + if (chipset != 0x04) + override_boot0 = 0x20104000; + else + override_boot0 = 0x20004000; + } + + nvdev_warn(device, "CHIPSET OVERRIDE: %08x -> %08x\n", + boot0, override_boot0); + boot0 = override_boot0; + } + /* determine chipset and derive architecture from it */ if ((boot0 & 0x1f000000) > 0) { device->chipset = (boot0 & 0x1ff00000) >> 20; -- 2.30.2