From 803abfd8dda540b94ea3c754a70cba69d3825995 Mon Sep 17 00:00:00 2001
From: Julian Braha <julianbraha@gmail.com>
Date: Mon, 17 Jan 2022 00:21:46 -0500
Subject: [PATCH] drm: bridge: fix unmet dependency on DRM_KMS_HELPER for DRM_PANEL_BRIDGE
Git-commit: 803abfd8dda540b94ea3c754a70cba69d3825995
Patch-mainline: v5.18-rc1
References: git-fixes

When DRM_CHIPONE_ICN6211 is selected, and DRM_KMS_HELPER is not selected,
Kbuild gives the following warning:

Warning: unmet direct dependencies detected for DRM_PANEL_BRIDGE  Depends on [n]: HAS_IOMEM [=y] && DRM_BRIDGE [=y] && DRM_KMS_HELPER [=n]  Selected by [y]:  - DRM_CHIPONE_ICN6211 [=y] && HAS_IOMEM [=y] && DRM [=y] && DRM_BRIDGE [=y] && OF [=y]

This is because DRM_CHIPONE_ICN6211 selects DRM_PANEL_BRIDGE
without depending on or selecting DRM_KMS_HELPER,
despite DRM_PANEL_BRIDGE depending on DRM_KMS_HELPER.

This unmet dependency bug was detected by Kismet,
a static analysis tool for Kconfig.

Fixes: ce517f18944e ("drm: bridge: Add Chipone ICN6211 MIPI-DSI to RGB bridge")
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Julian Braha <julianbraha@gmail.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220117052146.75811-1-julianbraha@gmail.com
Acked-by: Takashi Iwai <tiwai@suse.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 61db5a66b493..a1b52eaf26e0 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -30,6 +30,7 @@ config DRM_CDNS_DSI
 config DRM_CHIPONE_ICN6211
 	tristate "Chipone ICN6211 MIPI-DSI/RGB Converter bridge"
 	depends on OF
+	depends on DRM_KMS_HELPER
 	select DRM_MIPI_DSI
 	select DRM_PANEL_BRIDGE
 	help
-- 
2.31.1