From: Alexandre Courbot <acourbot@nvidia.com>
To: "Miguel Ojeda" <ojeda@kernel.org>,
"Nicolas Schier" <nsc@kernel.org>,
"Boqun Feng" <boqun@kernel.org>, "Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Danilo Krummrich" <dakr@kernel.org>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>,
Alistair Popple <apopple@nvidia.com>,
Timur Tabi <ttabi@nvidia.com>, Zhi Wang <zhiw@nvidia.com>,
Eliot Courtney <ecourtney@nvidia.com>,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
rust-for-linux@vger.kernel.org, nova-gpu@lists.linux.dev,
dri-devel@lists.freedesktop.org,
Alexandre Courbot <acourbot@nvidia.com>
Subject: [PATCH v4 2/6] gpu: build nova-core and nova-drm from drivers/gpu/Makefile
Date: Fri, 05 Jun 2026 17:31:52 +0900 [thread overview]
Message-ID: <20260605-nova-exports-v4-2-e948c287407c@nvidia.com> (raw)
In-Reply-To: <20260605-nova-exports-v4-0-e948c287407c@nvidia.com>
A dependency between nova-core and nova-drm is about to be introduced,
which requires nova-core to be built first. As this is not easily doable
from separate directories, move both build targets to the first common
parent, `drivers/gpu/Makefile`.
Suggested-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
drivers/gpu/Makefile | 12 +++++++++++-
drivers/gpu/drm/Makefile | 2 +-
drivers/gpu/drm/nova/Makefile | 4 +---
drivers/gpu/nova-core/Makefile | 4 +---
4 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile
index b4e5e338efa2..45e0941324fb 100644
--- a/drivers/gpu/Makefile
+++ b/drivers/gpu/Makefile
@@ -7,4 +7,14 @@ obj-$(CONFIG_GPU_BUDDY) += buddy.o
obj-y += host1x/ drm/ vga/ tests/
obj-$(CONFIG_IMX_IPUV3_CORE) += ipu-v3/
obj-$(CONFIG_TRACE_GPU_MEM) += trace/
-obj-$(CONFIG_NOVA_CORE) += nova-core/
+
+# nova-core and nova-drm are built from this Makefile so nova-drm's dependency
+# on nova-core can be expressed as a plain Make prerequisite rather than a
+# recursive sub-make. This is a temporary workaround until the Rust build
+# system supports cross-crate dependencies natively.
+
+obj-$(CONFIG_NOVA_CORE) += nova-core.o
+nova-core-y := nova-core/nova_core.o
+
+obj-$(CONFIG_DRM_NOVA) += nova-drm.o
+nova-drm-y := drm/nova/nova.o
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index e97faabcd783..e635fcffd379 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -186,7 +186,7 @@ obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
obj-$(CONFIG_DRM_VGEM) += vgem/
obj-$(CONFIG_DRM_VKMS) += vkms/
obj-$(CONFIG_DRM_NOUVEAU) +=nouveau/
-obj-$(CONFIG_DRM_NOVA) += nova/
+# nova-drm is built from drivers/gpu/Makefile together with nova-core.
obj-$(CONFIG_DRM_EXYNOS) +=exynos/
obj-$(CONFIG_DRM_ROCKCHIP) +=rockchip/
obj-$(CONFIG_DRM_GMA500) += gma500/
diff --git a/drivers/gpu/drm/nova/Makefile b/drivers/gpu/drm/nova/Makefile
index f8527b2b7b4a..b9fad3956358 100644
--- a/drivers/gpu/drm/nova/Makefile
+++ b/drivers/gpu/drm/nova/Makefile
@@ -1,4 +1,2 @@
# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_DRM_NOVA) += nova-drm.o
-nova-drm-y := nova.o
+# nova-drm is built from drivers/gpu/Makefile.
diff --git a/drivers/gpu/nova-core/Makefile b/drivers/gpu/nova-core/Makefile
index 4ae544f808f4..4c15729704a1 100644
--- a/drivers/gpu/nova-core/Makefile
+++ b/drivers/gpu/nova-core/Makefile
@@ -1,4 +1,2 @@
# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_NOVA_CORE) += nova-core.o
-nova-core-y := nova_core.o
+# nova-core is built from drivers/gpu/Makefile.
--
2.54.0
next prev parent reply other threads:[~2026-06-05 8:32 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-05 8:31 [PATCH v4 0/6] gpu: drm: nova: enable calling into nova-core Alexandre Courbot
2026-06-05 8:31 ` [PATCH v4 1/6] rust: inline some init methods Alexandre Courbot
2026-06-08 7:05 ` Miguel Ojeda
2026-06-05 8:31 ` Alexandre Courbot [this message]
2026-06-05 8:31 ` [PATCH v4 3/6] gpu: nova-core: export Rust symbols for nova-drm Alexandre Courbot
2026-06-05 8:45 ` sashiko-bot
2026-06-05 8:31 ` [PATCH v4 4/6] gpu: nova-core: emit Rust metadata " Alexandre Courbot
2026-06-05 8:36 ` Miguel Ojeda
2026-06-05 8:31 ` [PATCH v4 5/6] gpu: drm: nova: build after nova-core and use its symbols Alexandre Courbot
2026-06-05 8:31 ` [PATCH POC v4 6/6] gpu: drm: nova: demonstrate interaction with nova-core Alexandre Courbot
2026-06-05 8:45 ` sashiko-bot
2026-06-05 8:48 ` [PATCH v4 0/6] gpu: drm: nova: enable calling into nova-core Miguel Ojeda
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