linux-kernel - [PATCH 5.13 389/800] drm/bridge/sii8620: fix dependency on extcon

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Date:   Mon, 12 Jul 2021 08:06:52 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Robert Foss <robert.foss@...aro.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 389/800] drm/bridge/sii8620: fix dependency on extcon

From: Robert Foss <robert.foss@...aro.org>

[ Upstream commit 08319adbdde15ef7cee1970336f63461254baa2a ]

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.

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

Fixes: 688838442147 ("drm/bridge/sii8620: use micro-USB cable detection logic to detect MHL")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Robert Foss <robert.foss@...aro.org>
Reviewed-by: Randy Dunlap <rdunlap@...radead.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210419090124.153560-1-robert.foss@linaro.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 400193e38d29..eb3eebab4f27 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -172,7 +172,7 @@ config DRM_SIL_SII8620
 	tristate "Silicon Image SII8620 HDMI/MHL bridge"
 	depends on OF
 	select DRM_KMS_HELPER
-	imply EXTCON
+	select EXTCON
 	depends on RC_CORE || !RC_CORE
 	help
 	  Silicon Image SII8620 HDMI/MHL bridge chip driver.
-- 
2.30.2