linux-kernel - [PATCH v2 -next] drm/rockchip: Fix Kconfig dependencies

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Date:   Sat, 7 May 2022 18:09:10 +0800
From:   Ren Zhijie <renzhijie2@...wei.com>
To:     <hjc@...k-chips.com>, <heiko@...ech.de>, <airlied@...ux.ie>,
        <daniel@...ll.ch>, <lyude@...hat.com>, <tzimmermann@...e.de>
CC:     <dri-devel@...ts.freedesktop.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-rockchip@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "Ren Zhijie" <renzhijie2@...wei.com>
Subject: [PATCH v2 -next] drm/rockchip: Fix Kconfig dependencies

drivers/gpu/drm/rockchip/cdn-dp-core.o: In function `cdn_dp_connector_mode_valid':
cdn-dp-core.c:(.text+0x1e1): undefined reference to `drm_dp_bw_code_to_link_rate'
cdn-dp-core.c:(.text+0x1f4): undefined reference to `drm_dp_bw_code_to_link_rate'
drivers/gpu/drm/rockchip/cdn-dp-core.o: In function `cdn_dp_pd_event_work':
cdn-dp-core.c:(.text+0x138e): undefined reference to `drm_dp_channel_eq_ok'
drivers/gpu/drm/rockchip/cdn-dp-reg.o: In function `cdn_dp_train_link':
cdn-dp-reg.c:(.text+0xd5a): undefined reference to `drm_dp_bw_code_to_link_rate'

The DP-helper module has been replaced by the display-helper module.
So the driver have to select it.

Reported-by: Hulk Robot <hulkci@...wei.com>
Fixes: 1e0f66420b13("drm/display: Introduce a DRM display-helper module")
Signed-off-by: Ren Zhijie <renzhijie2@...wei.com>
---
v2: remove "select DRM_DISPLAY_HELPER if ROCKCHIP_ANALOGIX_DP" under DRM_ROCKCHIP at the head,
and separately add the select for ROCKCHIP_ANALOGIX_DP and ROCKCHIP_CDN_DP, which Andy suggested.
---
---
 drivers/gpu/drm/rockchip/Kconfig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index 5afab49dc4f2..53c2d9980d48 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -2,7 +2,6 @@
 config DRM_ROCKCHIP
 	tristate "DRM Support for Rockchip"
 	depends on DRM && ROCKCHIP_IOMMU
-	select DRM_DISPLAY_HELPER if ROCKCHIP_ANALOGIX_DP
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_HELPER
 	select DRM_PANEL
@@ -38,6 +37,7 @@ config ROCKCHIP_VOP2
 config ROCKCHIP_ANALOGIX_DP
 	bool "Rockchip specific extensions for Analogix DP driver"
 	depends on ROCKCHIP_VOP
+	select DRM_DISPLAY_HELPER
 	select DRM_DISPLAY_DP_HELPER
 	help
 	  This selects support for Rockchip SoC specific extensions
@@ -47,6 +47,8 @@ config ROCKCHIP_ANALOGIX_DP
 config ROCKCHIP_CDN_DP
 	bool "Rockchip cdn DP"
 	depends on EXTCON=y || (EXTCON=m && DRM_ROCKCHIP=m)
+	select DRM_DISPLAY_HELPER
+	select DRM_DISPLAY_DP_HELPER
 	help
 	  This selects support for Rockchip SoC specific extensions
 	  for the cdn DP driver. If you want to enable Dp on
-- 
2.17.1