From: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
To: Oded Gabbay <ogabbay@kernel.org>, Arnd Bergmann <arnd@kernel.org>
Cc: Jeffrey Hugo <quic_jhugo@quicinc.com>,
Arnd Bergmann <arnd@arndb.de>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
Melissa Wen <mwen@igalia.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Dave Airlie <airlied@redhat.com>
Subject: Re: [PATCH] [v2] accel: fix CONFIG_DRM dependencies
Date: Tue, 31 Jan 2023 10:20:08 +0100 [thread overview]
Message-ID: <6b48eef6-2f9c-9673-fe3d-009d29dea641@linux.intel.com> (raw)
In-Reply-To: <CAFCwf10RRFUqYEATg7p-LmKSEkFtAhneufJTdezFA7i3HJaDDw@mail.gmail.com>
On 31.01.2023 09:53, Oded Gabbay wrote:
> On Sat, Jan 28, 2023 at 12:15 AM Arnd Bergmann <arnd@kernel.org> wrote:
>>
>> From: Arnd Bergmann <arnd@arndb.de>
>>
>> At the moment, accel drivers can be built-in even with CONFIG_DRM=m,
>> but this causes a link failure:
>>
>> x86_64-linux-ld: drivers/accel/ivpu/ivpu_drv.o: in function `ivpu_dev_init':
>> ivpu_drv.c:(.text+0x1535): undefined reference to `drmm_kmalloc'
>> x86_64-linux-ld: ivpu_drv.c:(.text+0x1562): undefined reference to `drmm_kmalloc'
>> x86_64-linux-ld: drivers/accel/ivpu/ivpu_drv.o: in function `ivpu_remove':
>> ivpu_drv.c:(.text+0x1faa): undefined reference to `drm_dev_unregister'
>> x86_64-linux-ld: drivers/accel/ivpu/ivpu_drv.o: in function `ivpu_probe':
>> ivpu_drv.c:(.text+0x1fef): undefined reference to `__devm_drm_dev_alloc'
>>
>> The problem is that DRM_ACCEL is a 'bool' symbol symbol, so driver that
>> only depend on DRM_ACCEL but not also on DRM do not see the restriction
>> to =m configs.
>>
>> To ensure that each accel driver has an implied dependency on CONFIG_DRM,
>> enclose the entire Kconfig file in an if/endif check.
>>
>> Fixes: 8bf4889762a8 ("drivers/accel: define kconfig and register a new major")
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>> ---
>> v2: rearrage the DRM dependency rather than requiring DRM to be built-in
>> ---
>> drivers/accel/Kconfig | 5 ++++-
>> 1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/accel/Kconfig b/drivers/accel/Kconfig
>> index 834863902e16..c437206aa3f1 100644
>> --- a/drivers/accel/Kconfig
>> +++ b/drivers/accel/Kconfig
>> @@ -6,9 +6,10 @@
>> # as, but not limited to, Machine-Learning and Deep-Learning acceleration
>> # devices
>> #
>> +if DRM
>> +
>> menuconfig DRM_ACCEL
>> bool "Compute Acceleration Framework"
>> - depends on DRM
>> help
>> Framework for device drivers of compute acceleration devices, such
>> as, but not limited to, Machine-Learning and Deep-Learning
>> @@ -25,3 +26,5 @@ menuconfig DRM_ACCEL
>>
>> source "drivers/accel/habanalabs/Kconfig"
>> source "drivers/accel/ivpu/Kconfig"
>> +
>> +endif
>> --
>> 2.39.0
>>
> This patch is:
> Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Applied to drm-misc-next.
Thanks.
next prev parent reply other threads:[~2023-01-31 9:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-27 22:14 [PATCH] [v2] accel: fix CONFIG_DRM dependencies Arnd Bergmann
2023-01-30 9:41 ` Stanislaw Gruszka
2023-01-30 15:42 ` Jeffrey Hugo
2023-01-31 8:53 ` Oded Gabbay
2023-01-31 9:20 ` Jacek Lawrynowicz [this message]
2023-02-01 10:36 ` Thomas Zimmermann
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