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From: "Enrico Weigelt, metux IT consult" <lkml@metux.net>
To: Jason Wang <jasowang@redhat.com>,
	"Enrico Weigelt, metux IT consult" <info@metux.net>,
	linux-kernel@vger.kernel.org
Cc: corbet@lwn.net, mst@redhat.com, linus.walleij@linaro.org,
	linux-doc@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	bgolaszewski@baylibre.com, linux-gpio@vger.kernel.org,
	linux-riscv@lists.infradead.org
Subject: Re: [PATCH v2 2/2] drivers: gpio: add virtio-gpio guest driver
Date: Sat, 5 Dec 2020 08:59:55 +0100	[thread overview]
Message-ID: <96aca1e6-2d5a-deb1-2444-88f938c7a9de@metux.net> (raw)
In-Reply-To: <8209ce55-a4aa-f256-b9b9-f7eb3cac877b@redhat.com>

On 04.12.20 04:35, Jason Wang wrote:

>> --- a/drivers/gpio/Kconfig
>> +++ b/drivers/gpio/Kconfig
>> @@ -1615,6 +1615,15 @@ config GPIO_MOCKUP
>>         tools/testing/selftests/gpio/gpio-mockup.sh. Reference the
>> usage in
>>         it.
>>   +config GPIO_VIRTIO
>> +    tristate "VirtIO GPIO support"
>> +    depends on VIRTIO
> 
> 
> Let's use select, since there's no prompt for VIRTIO and it doesn't have
> any dependencies.

whoops, it's not that simple:

make: Entering directory '/home/nekrad/src/apu2-dev/pkg/kernel.apu2.git'
make[1]: Entering directory
'/home/nekrad/src/dk/DistroKit/platform-x86_64/build-target/linux-5.8.9-build'
  GEN     Makefile
drivers/gpu/drm/Kconfig:74:error: recursive dependency detected!
drivers/gpu/drm/Kconfig:74:	symbol DRM_KMS_HELPER is selected by
DRM_VIRTIO_GPU
drivers/gpu/drm/virtio/Kconfig:2:	symbol DRM_VIRTIO_GPU depends on VIRTIO
drivers/virtio/Kconfig:2:	symbol VIRTIO is selected by GPIO_VIRTIO
drivers/gpio/Kconfig:1618:	symbol GPIO_VIRTIO depends on GPIOLIB
drivers/gpio/Kconfig:14:	symbol GPIOLIB is selected by I2C_MUX_LTC4306
drivers/i2c/muxes/Kconfig:47:	symbol I2C_MUX_LTC4306 depends on I2C
drivers/i2c/Kconfig:8:	symbol I2C is selected by FB_DDC
drivers/video/fbdev/Kconfig:63:	symbol FB_DDC depends on FB
drivers/video/fbdev/Kconfig:12:	symbol FB is selected by DRM_KMS_FB_HELPER
drivers/gpu/drm/Kconfig:80:	symbol DRM_KMS_FB_HELPER depends on
DRM_KMS_HELPER

Seems that we can only depend on or select some symbol - we run into
huge trouble if thats mixed. Just changed DRM_VIRTIO_GPU to just select
VIRIO instead of depending on it, and now it works.

I've posted another patch for fixing drivers/gpu/drm/virtio/Kconfig
to use 'select' instead of 'depends on'.

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@metux.net -- +49-151-27565287

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  parent reply	other threads:[~2020-12-05  8:00 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-03 19:11 [PATCH v2 1/2] drivers: gpio: put virtual gpio device into their own submenu Enrico Weigelt, metux IT consult
2020-12-03 19:11 ` [PATCH v2 2/2] drivers: gpio: add virtio-gpio guest driver Enrico Weigelt, metux IT consult
2020-12-04  3:35   ` Jason Wang
2020-12-04  9:36     ` Enrico Weigelt, metux IT consult
2020-12-07  3:48       ` Jason Wang
2020-12-07  9:33         ` Enrico Weigelt, metux IT consult
2020-12-08  2:49           ` Jason Wang
2021-04-13 11:07       ` Alex Bennée
2020-12-05  7:59     ` Enrico Weigelt, metux IT consult [this message]
2020-12-05 19:32       ` Michael S. Tsirkin
2020-12-05 20:05         ` Enrico Weigelt, metux IT consult
2020-12-07  3:16           ` Jason Wang
2020-12-07 13:52           ` Michael S. Tsirkin
2020-12-07 20:34             ` Enrico Weigelt, metux IT consult
2020-12-07  3:12         ` Jason Wang
2020-12-07 13:53           ` Michael S. Tsirkin
2020-12-08  2:36             ` Jason Wang
2020-12-08  7:02               ` Enrico Weigelt, metux IT consult
2020-12-09  9:31                 ` Jason Wang
2020-12-09 10:33                   ` Enrico Weigelt, metux IT consult
2020-12-08 10:10         ` Michal Suchánek
2020-12-08 12:33           ` Enrico Weigelt, metux IT consult
2020-12-09 10:34             ` Michal Suchánek
2020-12-05 20:15   ` Howto listen to/handle gpio state changes ? " Enrico Weigelt, metux IT consult
2020-12-08  9:38     ` Linus Walleij
2020-12-08 14:04       ` Enrico Weigelt, metux IT consult
2020-12-08 16:15         ` Grygorii Strashko
2020-12-09  8:51         ` Linus Walleij
2020-12-09 11:19           ` Arnd Bergmann
2020-12-09 12:53             ` Linus Walleij
2020-12-09 20:22               ` Grygorii Strashko
2020-12-09 20:38                 ` Arnd Bergmann
2020-12-10 13:32                   ` Grygorii Strashko
2021-05-24 11:27   ` Viresh Kumar
2021-05-25 12:59     ` Enrico Weigelt, metux IT consult
2021-05-26  3:32       ` Viresh Kumar
2021-07-03  8:05         ` Michael S. Tsirkin
2021-07-05  3:51           ` Viresh Kumar
2020-12-07  9:55 ` [PATCH v2 1/2] drivers: gpio: put virtual gpio device into their own submenu Andy Shevchenko
2020-12-07 10:31 ` Bartosz Golaszewski
2020-12-07 11:22   ` Enrico Weigelt, metux IT consult

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