[PATCH] nouveau/gsp: add kconfig option to enable GSP paths by default

[Dave Airlie]

From: Dave Airlie <airl...@redhat.com>

Turing and Ampere will continue to use the old paths by default,
but we should allow distros to decide what the policy is.

Signed-off-by: Dave Airlie <airl...@redhat.com>
---
 drivers/gpu/drm/nouveau/Kconfig                | 8 ++++++++
 drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c | 6 +++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index 1e6aaf95ff7c..ceef470c9fbf 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -100,3 +100,11 @@ config DRM_NOUVEAU_SVM
        help
          Say Y here if you want to enable experimental support for
          Shared Virtual Memory (SVM).
+
+config DRM_NOUVEAU_GSP_DEFAULT
+       bool "Use GSP firmware for Turing/Ampere (needs firmware installed)"
+       depends on DRM_NOUVEAU
+       default n
+       help
+         Say Y here if you want to use the GSP codepaths by default on
+         Turing and Ampere GPUs.
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c 
b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
index a41735ab6068..a64c81385682 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
@@ -2312,8 +2312,12 @@ r535_gsp_load(struct nvkm_gsp *gsp, int ver, const 
struct nvkm_gsp_fwif *fwif)
 {
        struct nvkm_subdev *subdev = &gsp->subdev;
        int ret;
+       bool enable_gsp = fwif->enable;
 
-       if (!nvkm_boolopt(subdev->device->cfgopt, "NvGspRm", fwif->enable))
+#if IS_ENABLED(CONFIG_DRM_NOUVEAU_GSP_DEFAULT)
+       enable_gsp = true;
+#endif
+       if (!nvkm_boolopt(subdev->device->cfgopt, "NvGspRm", enable_gsp))
                return -EINVAL;
 
        if ((ret = r535_gsp_load_fw(gsp, "gsp", fwif->ver, &gsp->fws.rm)) ||
-- 
2.43.0