Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Robert Foss <robert.foss@linaro.org>
To:     a.hajda@samsung.com, narmstrong@baylibre.com,
        robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com,
        jonas@kwiboo.se, jernej.skrabec@siol.net, airlied@linux.ie,
        daniel@ffwll.ch, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org,
        Masahiro Yamada <masahiroy@kernel.org>
Cc:     kernel test robot <lkp@intel.com>
Subject: [PATCH v1] drm/bridge/sii8620: fix dependency on extcon
Date:   Tue,  6 Apr 2021 11:35:36 +0200
Message-Id: <20210406093536.635748-1-robert.foss@linaro.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

The DRM_SIL_SII8620 kconfig has a weak `imply` dependency
on EXTCON, which causes issues when sii8620 is built
as a builtin and EXTCON is built as a module.

Th symptoms are 'undefined reference' errors caused
by the symbols in EXTCON not being available
to the sii8620 driver.

Signed-off-by: Robert Foss <robert.foss@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
---

LKP reported issue:
https://lore.kernel.org/lkml/202104040604.SSTe2Cxf-lkp@intel.com/

 drivers/gpu/drm/bridge/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 7c15fc170510..204c38e87849 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -169,7 +169,7 @@ config DRM_SIL_SII8620
 	tristate "Silicon Image SII8620 HDMI/MHL bridge"
 	depends on OF
 	select DRM_KMS_HELPER
-	imply EXTCON
+	depends on EXTCON || !EXTCON # if EXTCON=m, this cannot be built-in
 	depends on RC_CORE || !RC_CORE
 	help
 	  Silicon Image SII8620 HDMI/MHL bridge chip driver.
-- 
2.31.0.30.g398dba342d.dirty