From: Arnd Bergmann <arnd@arndb.de> To: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Masahiro Yamada <masahiroy@kernel.org>, Nicolas Pitre <nico@fluxnic.net>, Andrzej Hajda <a.hajda@samsung.com>, Neil Armstrong <narmstrong@baylibre.com>, Jonas Karlman <jonas@kwiboo.se>, Jernej Skrabec <jernej.skrabec@siol.net>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>, "David S. Miller" <davem@davemloft.net>, Saeed Mahameed <saeedm@mellanox.com>, Leon Romanovsky <leon@kernel.org>, dri-devel <dri-devel@lists.freedesktop.org>, Linux-Renesas <linux-renesas-soc@vger.kernel.org>, Networking <netdev@vger.kernel.org>, linux-rdma <linux-rdma@vger.kernel.org> Subject: Re: [RFC 5/6] drm/rcar-du: fix selection of CMM driver Date: Wed, 15 Apr 2020 17:18:20 +0200 [thread overview] Message-ID: <CAK8P3a1uasBFg9dwvPEcokrRhYE2qh6iwOMW1fDTY+LBZMrTjg@mail.gmail.com> (raw) In-Reply-To: <CAMuHMdUb=XXucGUbxt26tZ1xu9pdyVUB8RVsfB2SffURVVXwSg@mail.gmail.com> On Wed, Apr 15, 2020 at 4:13 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > On Wed, Apr 15, 2020 at 3:47 PM Arnd Bergmann <arnd@arndb.de> wrote: > > On Tue, Apr 14, 2020 at 10:52 PM Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote: > > > Doesn't "imply" mean it gets selected by default but can be manually > > > disabled ? > > > > That may be what it means now (I still don't understand how it's defined > > as of v5.7-rc1), but traditionally it was more like a 'select if all > > dependencies are met'. > > That's still what it is supposed to mean right now ;-) > Except that now it should correctly handle the modular case, too. Then there is a bug. If I run 'make menuconfig' now on a mainline kernel and enable CONFIG_DRM_RCAR_DU, I can set DRM_RCAR_CMM and DRM_RCAR_LVDS to 'y', 'n' or 'm' regardless of whether CONFIG_DRM_RCAR_DU is 'm' or 'y'. The 'implies' statement seems to be ignored entirely, except as reverse 'default' setting. > > > > In that case, a Makefile trick could also work, doing > > > > ifdef CONFIG_DRM_RCAR_CMM > > obj-$(CONFIG_DRM_RCAR_DU) += rcar-cmm.o > > endif > > > > Thereby making the cmm module have the same state (y or m) as > > the du module whenever the option is enabled. > > What about dropping the "imply DRM_RCAR_CMM", but defaulting to > enable CMM if DU is enabled? > > config DRM_RCAR_CMM > tristate "R-Car DU Color Management Module (CMM) Support" > depends on DRM_RCAR_DU && OF > default DRM_RCAR_DU That doesn't work because it allows DRM_RCAR_DU=y with DRM_RCAR_CMM=m, which causes a link failure. Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de> To: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Jernej Skrabec <jernej.skrabec@siol.net>, Leon Romanovsky <leon@kernel.org>, Neil Armstrong <narmstrong@baylibre.com>, David Airlie <airlied@linux.ie>, Networking <netdev@vger.kernel.org>, Masahiro Yamada <masahiroy@kernel.org>, Nicolas Pitre <nico@fluxnic.net>, Saeed Mahameed <saeedm@mellanox.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, dri-devel <dri-devel@lists.freedesktop.org>, Linux-Renesas <linux-renesas-soc@vger.kernel.org>, Andrzej Hajda <a.hajda@samsung.com>, Jonas Karlman <jonas@kwiboo.se>, Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, "David S. Miller" <davem@davemloft.net>, linux-rdma <linux-rdma@vger.kernel.org> Subject: Re: [RFC 5/6] drm/rcar-du: fix selection of CMM driver Date: Wed, 15 Apr 2020 17:18:20 +0200 [thread overview] Message-ID: <CAK8P3a1uasBFg9dwvPEcokrRhYE2qh6iwOMW1fDTY+LBZMrTjg@mail.gmail.com> (raw) In-Reply-To: <CAMuHMdUb=XXucGUbxt26tZ1xu9pdyVUB8RVsfB2SffURVVXwSg@mail.gmail.com> On Wed, Apr 15, 2020 at 4:13 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > On Wed, Apr 15, 2020 at 3:47 PM Arnd Bergmann <arnd@arndb.de> wrote: > > On Tue, Apr 14, 2020 at 10:52 PM Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote: > > > Doesn't "imply" mean it gets selected by default but can be manually > > > disabled ? > > > > That may be what it means now (I still don't understand how it's defined > > as of v5.7-rc1), but traditionally it was more like a 'select if all > > dependencies are met'. > > That's still what it is supposed to mean right now ;-) > Except that now it should correctly handle the modular case, too. Then there is a bug. If I run 'make menuconfig' now on a mainline kernel and enable CONFIG_DRM_RCAR_DU, I can set DRM_RCAR_CMM and DRM_RCAR_LVDS to 'y', 'n' or 'm' regardless of whether CONFIG_DRM_RCAR_DU is 'm' or 'y'. The 'implies' statement seems to be ignored entirely, except as reverse 'default' setting. > > > > In that case, a Makefile trick could also work, doing > > > > ifdef CONFIG_DRM_RCAR_CMM > > obj-$(CONFIG_DRM_RCAR_DU) += rcar-cmm.o > > endif > > > > Thereby making the cmm module have the same state (y or m) as > > the du module whenever the option is enabled. > > What about dropping the "imply DRM_RCAR_CMM", but defaulting to > enable CMM if DU is enabled? > > config DRM_RCAR_CMM > tristate "R-Car DU Color Management Module (CMM) Support" > depends on DRM_RCAR_DU && OF > default DRM_RCAR_DU That doesn't work because it allows DRM_RCAR_DU=y with DRM_RCAR_CMM=m, which causes a link failure. Arnd _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2020-04-15 15:18 UTC|newest] Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-08 20:27 [RFC 0/6] Regressions for "imply" behavior change Arnd Bergmann 2020-04-08 20:27 ` Arnd Bergmann 2020-04-08 20:27 ` [RFC 1/6] thunder: select PTP driver if possible Arnd Bergmann 2020-04-08 20:27 ` Arnd Bergmann 2020-04-08 20:27 ` [RFC 2/6] net/mlx5e: fix VXLAN dependency Arnd Bergmann 2020-04-08 20:27 ` Arnd Bergmann 2020-04-08 20:27 ` [RFC 3/6] LiquidIO VF: add dependency for PTP_1588_CLOCK Arnd Bergmann 2020-04-08 20:27 ` Arnd Bergmann 2020-04-08 21:10 ` kbuild test robot 2020-04-08 21:13 ` Arnd Bergmann 2020-04-08 20:27 ` [RFC 4/6] drm/bridge/sii8620: fix extcon dependency Arnd Bergmann 2020-04-08 20:27 ` Arnd Bergmann 2020-04-10 6:56 ` Andrzej Hajda 2020-04-10 6:56 ` Andrzej Hajda 2020-04-14 15:04 ` Arnd Bergmann 2020-04-14 15:04 ` Arnd Bergmann 2020-04-14 15:37 ` Daniel Vetter 2020-04-14 15:37 ` Daniel Vetter 2020-04-15 6:58 ` Jani Nikula 2020-04-15 6:58 ` Jani Nikula 2020-04-08 20:27 ` [RFC 5/6] drm/rcar-du: fix selection of CMM driver Arnd Bergmann 2020-04-08 20:27 ` Arnd Bergmann 2020-04-14 20:17 ` Laurent Pinchart 2020-04-14 20:17 ` Laurent Pinchart 2020-04-14 20:38 ` Arnd Bergmann 2020-04-14 20:38 ` Arnd Bergmann 2020-04-14 20:51 ` Laurent Pinchart 2020-04-14 20:51 ` Laurent Pinchart 2020-04-14 21:10 ` Arnd Bergmann 2020-04-14 21:10 ` Arnd Bergmann 2020-04-15 14:13 ` Geert Uytterhoeven 2020-04-15 14:13 ` Geert Uytterhoeven 2020-04-15 15:18 ` Arnd Bergmann [this message] 2020-04-15 15:18 ` Arnd Bergmann 2020-04-15 19:07 ` Arnd Bergmann 2020-04-15 19:07 ` Arnd Bergmann 2020-04-15 21:12 ` Laurent Pinchart 2020-04-15 21:12 ` Laurent Pinchart 2020-04-15 21:22 ` Arnd Bergmann 2020-04-15 21:22 ` Arnd Bergmann 2020-04-16 6:51 ` Daniel Vetter 2020-04-16 6:51 ` Daniel Vetter 2020-04-16 15:17 ` Laurent Pinchart 2020-04-16 15:17 ` Laurent Pinchart 2020-04-08 20:27 ` [RFC 6/6] drm/rcar-du: fix lvds dependency Arnd Bergmann 2020-04-08 20:27 ` Arnd Bergmann 2020-04-08 20:38 ` [RFC 0/6] Regressions for "imply" behavior change Nicolas Pitre 2020-04-08 20:38 ` Nicolas Pitre 2020-04-08 20:46 ` Saeed Mahameed 2020-04-08 20:46 ` Saeed Mahameed 2020-04-08 20:49 ` Arnd Bergmann 2020-04-08 20:49 ` Arnd Bergmann 2020-04-08 21:17 ` Nicolas Pitre 2020-04-08 21:17 ` Nicolas Pitre 2020-04-08 22:42 ` Jason Gunthorpe 2020-04-08 22:42 ` Jason Gunthorpe 2020-04-09 8:41 ` Jani Nikula 2020-04-09 8:41 ` Jani Nikula 2020-04-10 2:40 ` Saeed Mahameed 2020-04-10 2:40 ` Saeed Mahameed 2020-04-10 7:26 ` Geert Uytterhoeven 2020-04-10 7:26 ` Geert Uytterhoeven 2020-04-10 17:13 ` Jason Gunthorpe 2020-04-10 17:13 ` Jason Gunthorpe 2020-04-10 19:04 ` Saeed Mahameed 2020-04-10 19:04 ` Saeed Mahameed 2020-04-14 13:29 ` Jason Gunthorpe 2020-04-14 13:29 ` Jason Gunthorpe 2020-04-14 14:27 ` Arnd Bergmann 2020-04-14 14:27 ` Arnd Bergmann 2020-04-14 15:23 ` Jason Gunthorpe 2020-04-14 15:23 ` Jason Gunthorpe 2020-04-14 15:25 ` Arnd Bergmann 2020-04-14 15:25 ` Arnd Bergmann 2020-04-14 17:49 ` Saeed Mahameed 2020-04-14 17:49 ` Saeed Mahameed 2020-04-14 18:47 ` Arnd Bergmann 2020-04-14 18:47 ` Arnd Bergmann 2020-04-16 3:25 ` Saeed Mahameed 2020-04-16 3:25 ` Saeed Mahameed 2020-04-16 7:20 ` Arnd Bergmann 2020-04-16 7:20 ` Arnd Bergmann 2020-04-16 10:17 ` Jani Nikula 2020-04-16 10:17 ` Jani Nikula 2020-04-16 12:38 ` Arnd Bergmann 2020-04-16 12:38 ` Arnd Bergmann 2020-04-16 14:52 ` Jason Gunthorpe 2020-04-16 14:52 ` Jason Gunthorpe 2020-04-16 15:58 ` Arnd Bergmann 2020-04-16 15:58 ` Arnd Bergmann 2020-04-16 18:05 ` Jason Gunthorpe 2020-04-16 18:05 ` Jason Gunthorpe 2020-04-16 18:38 ` Saeed Mahameed 2020-04-16 18:38 ` Saeed Mahameed 2020-04-16 15:12 ` Nicolas Pitre 2020-04-16 15:12 ` Nicolas Pitre 2020-04-16 18:21 ` Jason Gunthorpe 2020-04-16 18:21 ` Jason Gunthorpe 2020-04-16 19:56 ` Andrzej Hajda 2020-04-16 19:56 ` Andrzej Hajda
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