linux-kernel - Re: [PATCH 4/8] drivers: media: i2c: fix warning same module names

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Date:   Thu, 6 Jun 2019 12:11:20 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Anders Roxell <anders.roxell@...aro.org>, airlied@...ux.ie,
        daniel@...ll.ch, a.hajda@...sung.com, mchehab@...nel.org
Cc:     andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        marex@...x.de, stefan@...er.ch, shawnguo@...nel.org,
        s.hauer@...gutronix.de, b.zolnierkie@...sung.com,
        p.zabel@...gutronix.de, hkallweit1@...il.com, lee.jones@...aro.org,
        lgirdwood@...il.com, broonie@...nel.org, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-fbdev@...r.kernel.org,
        linux-media@...r.kernel.org
Subject: Re: [PATCH 4/8] drivers: media: i2c: fix warning same module names

On 6/6/19 11:47 AM, Anders Roxell wrote:
> When building with CONFIG_VIDEO_ADV7511 and CONFIG_DRM_I2C_ADV7511
> enabled as loadable modules, we see the following warning:
> 
> warning: same module names found:
>   drivers/gpu/drm/bridge/adv7511/adv7511.ko
>   drivers/media/i2c/adv7511.ko
> 
> Rework so the names matches the config fragment.
> 
> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>

Change it in media, not in drm. The v4l2 adv7511 is rarely used, so it
makes sense to rename that, and not this drm driver.

> ---
> This is only one issue that have been addressed.
> The other issue is that itseems to refer to the same device name in
> i2c_device_id, any guidance how that should be solved?

You should never have both modules loaded. In fact, I think it is a good
idea to disable VIDEO_ADV7511 if DRM_I2C_ADV7511 is set in the Kconfig,
unless TEST_COMPILE is also set.

Regards,

	Hans

> 
> 
> Cheers,
> Anders
> 
>  drivers/gpu/drm/bridge/adv7511/Makefile | 10 +++++-----
>  drivers/media/i2c/Makefile              |  3 ++-
>  2 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/adv7511/Makefile b/drivers/gpu/drm/bridge/adv7511/Makefile
> index b46ebeb35fd4..e367426bd73e 100644
> --- a/drivers/gpu/drm/bridge/adv7511/Makefile
> +++ b/drivers/gpu/drm/bridge/adv7511/Makefile
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0-only
> -adv7511-y := adv7511_drv.o
> -adv7511-$(CONFIG_DRM_I2C_ADV7511_AUDIO) += adv7511_audio.o
> -adv7511-$(CONFIG_DRM_I2C_ADV7511_CEC) += adv7511_cec.o
> -adv7511-$(CONFIG_DRM_I2C_ADV7533) += adv7533.o
> -obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511.o
> +drm-i2c-adv7511-y := adv7511_drv.o
> +drm-i2c-adv7511-$(CONFIG_DRM_I2C_ADV7511_AUDIO) += adv7511_audio.o
> +drm-i2c-adv7511-$(CONFIG_DRM_I2C_ADV7511_CEC) += adv7511_cec.o
> +drm-i2c-adv7511-$(CONFIG_DRM_I2C_ADV7533) += adv7533.o
> +obj-$(CONFIG_DRM_I2C_ADV7511) += drm-i2c-adv7511.o
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index d8ad9dad495d..b71a427a89fd 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -35,7 +35,8 @@ obj-$(CONFIG_VIDEO_ADV748X) += adv748x/
>  obj-$(CONFIG_VIDEO_ADV7604) += adv7604.o
>  obj-$(CONFIG_VIDEO_ADV7842) += adv7842.o
>  obj-$(CONFIG_VIDEO_AD9389B) += ad9389b.o
> -obj-$(CONFIG_VIDEO_ADV7511) += adv7511.o
> +obj-$(CONFIG_VIDEO_ADV7511) += video-adv7511.o
> +video-adv7511-objs          := adv7511.o
>  obj-$(CONFIG_VIDEO_VPX3220) += vpx3220.o
>  obj-$(CONFIG_VIDEO_VS6624)  += vs6624.o
>  obj-$(CONFIG_VIDEO_BT819) += bt819.o
>