From: Arnd Bergmann <arnd@arndb.de>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Randy Dunlap <rdunlap@infradead.org>,
Sam Ravnborg <sam@ravnborg.org>,
Linus Walleij <linus.walleij@linaro.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Sean Paul <sean@poorly.run>,
dri-devel@lists.freedesktop.org,
Maxime Ripard <maxime.ripard@bootlin.com>,
Emil Velikov <emil.velikov@collabora.com>,
Boris Brezillon <boris.brezillon@collabora.com>,
Jani Nikula <jani.nikula@intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH] drm/drm_panel: fix export of drm_panel_of_backlight, try #3
Date: Tue, 7 Jan 2020 21:32:19 +0100 [thread overview]
Message-ID: <20200107203231.920256-1-arnd@arndb.de> (raw)
Making this IS_REACHABLE() was still wrong, as that just determines
whether the lower-level backlight code would be reachable from the panel
driver. However, with CONFIG_DRM=y and CONFIG_BACKLIGHT_CLASS_DEVICE=m,
the drm_panel_of_backlight is left out of drm_panel.o but the condition
tells the driver that it is there, leading to multiple link errors such as
ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-sitronix-st7701.ko] undefined!
ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-sharp-ls043t1le01.ko] undefined!
ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-seiko-43wvf1g.ko] undefined!
ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-ronbo-rb070d30.ko] undefined!
ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-rocktech-jh057n00900.ko] undefined!
ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.ko] undefined!
ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.ko] undefined!
Change the condition to check for whether the function was actually part
of the drm module. This version of the patch survived a few hundred
randconfig builds, so I have a good feeling this might be the last
one for the export.
Fixes: 4a34a9dcec94 ("drm/drm_panel: Fix EXPORT of drm_panel_of_backlight() one more time")
Fixes: 907aa265fde6 ("drm/drm_panel: fix EXPORT of drm_panel_of_backlight")
Fixes: 152dbdeab1b2 ("drm/panel: add backlight support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
include/drm/drm_panel.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
index 121f7aabccd1..6193cb555acc 100644
--- a/include/drm/drm_panel.h
+++ b/include/drm/drm_panel.h
@@ -198,7 +198,8 @@ static inline struct drm_panel *of_drm_find_panel(const struct device_node *np)
}
#endif
-#if IS_REACHABLE(CONFIG_BACKLIGHT_CLASS_DEVICE)
+#if IS_ENABLED(CONFIG_DRM_PANEL) && (IS_BUILTIN(CONFIG_BACKLIGHT_CLASS_DEVICE) || \
+ (IS_MODULE(CONFIG_DRM) && IS_MODULE(CONFIG_BACKLIGHT_CLASS_DEVICE)))
int drm_panel_of_backlight(struct drm_panel *panel);
#else
static inline int drm_panel_of_backlight(struct drm_panel *panel)
--
2.20.0
next reply other threads:[~2020-01-07 20:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 20:32 Arnd Bergmann [this message]
2020-01-08 9:55 ` [PATCH] drm/drm_panel: fix export of drm_panel_of_backlight, try #3 Jani Nikula
2020-01-08 10:08 ` Sam Ravnborg
2020-01-08 10:33 ` Arnd Bergmann
2020-01-08 16:46 ` Sam Ravnborg
2020-01-08 20:17 ` Arnd Bergmann
2020-01-12 20:22 ` Sam Ravnborg
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