linux-kernel - [PATCH] drm/hisilicon/hibmc: select CONFIG_DRM_DISPLAY_DP

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Message-Id: <20250127071059.617567-1-arnd@kernel.org>
Date: Mon, 27 Jan 2025 08:10:02 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Xinliang Liu <xinliang.liu@...aro.org>,
	Tian Tao <tiantao6@...ilicon.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Xinwei Kong <kong.kongxinwei@...ilicon.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Yongqin Liu <yongqin.liu@...aro.org>,
	John Stultz <jstultz@...gle.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Javier Martinez Canillas <javierm@...hat.com>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/hisilicon/hibmc: select CONFIG_DRM_DISPLAY_DP_HELPER

From: Arnd Bergmann <arnd@...db.de>

Without the DP helper code, the newly added displayport support
causes a link failure:

x86_64-linux-ld: drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.o: in function `hibmc_dp_aux_init':
dp_aux.c:(.text+0x37e): undefined reference to `drm_dp_aux_init'
x86_64-linux-ld: drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.o: in function `hibmc_dp_link_set_pattern':
dp_link.c:(.text+0xae): undefined reference to `drm_dp_dpcd_write'
x86_64-linux-ld: drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.o: in function `hibmc_dp_link_get_adjust_train':
dp_link.c:(.text+0x121): undefined reference to `drm_dp_get_adjust_request_voltage'
x86_64-linux-ld: dp_link.c:(.text+0x12e): undefined reference to `drm_dp_get_adjust_request_pre_emphasis'
x86_64-linux-ld: drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.o: in function `hibmc_dp_link_training':
dp_link.c:(.text+0x2b0): undefined reference to `drm_dp_dpcd_write'
x86_64-linux-ld: dp_link.c:(.text+0x2e3): undefined reference to `drm_dp_dpcd_write'

Add both DRM_DISPLAY_DP_HELPER and DRM_DISPLAY_HELPER, which is
in turn required by the former.

Fixes: 0ab6ea261c1f ("drm/hisilicon/hibmc: add dp module in hibmc")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/hisilicon/hibmc/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/Kconfig b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
index 93b8d32e3be1..98d77d74999d 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Kconfig
+++ b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
@@ -4,6 +4,8 @@ config DRM_HISI_HIBMC
 	depends on DRM && PCI
 	depends on MMU
 	select DRM_CLIENT_SELECTION
+	select DRM_DISPLAY_HELPER
+	select DRM_DISPLAY_DP_HELPER
 	select DRM_KMS_HELPER
 	select DRM_VRAM_HELPER
 	select DRM_TTM
-- 
2.39.5