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From:   Arnd Bergmann <arnd@arndb.de>
To:     Archit Taneja <architt@codeaurora.org>,
        Andrzej Hajda <a.hajda@samsung.com>,
        David Airlie <airlied@linux.ie>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Eric Anholt <eric@anholt.net>,
        Boris Brezillon <boris.brezillon@bootlin.com>,
        Maciej Purski <m.purski@samsung.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Jacopo Mondi <jacopo+renesas@jmondi.org>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH 7/8] drm/bridge: fix dependency for lvds-encoder
Date:   Fri, 25 May 2018 17:50:14 +0200
Message-Id: <20180525155030.3667352-7-arnd@arndb.de>
In-Reply-To: <20180525155030.3667352-1-arnd@arndb.de>
References: <20180525155030.3667352-1-arnd@arndb.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The DRM panel bridge code is built into the kms helpers module, so we
get a link error when trying to use it from a built-in driver while the
kms helper is a loadable module:

drivers/gpu/drm/bridge/lvds-encoder.o: In function `lvds_encoder_probe':
lvds-encoder.c:(.text+0x124): undefined reference to `devm_drm_panel_bridge_add'

This adds a the same dependency in the lvds-encoder that we use for all
the other users of the panel bridge. I did not bisect the problem, but
from inspection it seems to date back to the patch that separated out
the panel bridge from lvds encoder.

Fixes: 13dfc0540a57 ("drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/bridge/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 6caa47834194..cf47bfa7a050 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -46,6 +46,7 @@ config DRM_DUMB_VGA_DAC
 config DRM_LVDS_ENCODER
 	tristate "Transparent parallel to LVDS encoder support"
 	depends on OF
+	select DRM_KMS_HELPER
 	select DRM_PANEL_BRIDGE
 	help
 	  Support for transparent parallel to LVDS encoders that don't require
-- 
2.9.0