linux-kernel - [PATCH] drm/panel: Select DRM_DP_HELPER for DRM_PANEL

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Date:   Thu,  3 Feb 2022 10:13:40 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     thierry.reding@...il.com, sam@...nborg.org, airlied@...ux.ie,
        daniel@...ll.ch, lyude@...hat.com, linus.walleij@...aro.org,
        dianders@...omium.org, ardb@...nel.org, naresh.kamboju@...aro.org
Cc:     rdunlap@...radead.org, arnd@...db.de,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>
Subject: [PATCH] drm/panel: Select DRM_DP_HELPER for DRM_PANEL_EDP

As reported in [1], DRM_PANEL_EDP depends on DRM_DP_HELPER. Select
the option to fix the build failure. The issue has been reported
before, when DisplayPort helpers where hidden behind the option
CONFIG_DRM_KMS_HELPER. [2]

Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
Fixes: adb9d5a2cc77 ("drm/dp: Move DisplayPort helpers into separate helper module")
Fixes: 5f04e7ce392d ("drm/panel-edp: Split eDP panels out of panel-simple")
Reported-by: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: Thomas Zimmermann <tzimmermann@...e.de>
Cc: Lyude Paul <lyude@...hat.com>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Maxime Ripard <mripard@...nel.org>
Cc: dri-devel@...ts.freedesktop.org
---
 drivers/gpu/drm/panel/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 434c2861bb40..0aec5a10b064 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -106,6 +106,7 @@ config DRM_PANEL_EDP
 	depends on PM
 	select VIDEOMODE_HELPERS
 	select DRM_DP_AUX_BUS
+	select DRM_DP_HELPER
 	help
 	  DRM panel driver for dumb eDP panels that need at most a regulator and
 	  a GPIO to be powered up. Optionally a backlight can be attached so
-- 
2.34.1