linux-kernel - [PATCH v2] drm/display: Drop obsolete dependency on COMPILE

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Date: Tue, 18 Jun 2024 14:20:00 +0200
From: Jean Delvare <jdelvare@...e.de>
To: dri-devel@...ts.freedesktop.org, LKML <linux-kernel@...r.kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard 
 <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie
 <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, Doug Anderson
 <dianders@...omium.org>, YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH v2] drm/display: Drop obsolete dependency on COMPILE_TEST

Since commit 0166dc11be91 ("of: make CONFIG_OF user selectable"), it
is possible to test-build any driver which depends on OF on any
architecture by explicitly selecting OF. Therefore depending on
COMPILE_TEST as an alternative is no longer needed.

To avoid reintroducing the randconfig bug originally fixed by commit
876271118aa4 ("drm/display: Fix build error without CONFIG_OF"),
DRM_MSM which selects DRM_DISPLAY_DP_HELPER must explicitly depend
on OF. This is consistent with what all other DRM drivers are doing.

Signed-off-by: Jean Delvare <jdelvare@...e.de>
Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>
Cc: David Airlie <airlied@...il.com>
Cc: Daniel Vetter <daniel@...ll.ch>
---
For regular builds, this is a no-op, as OF is always enabled on
ARCH_QCOM and SOC_IMX5. So this change only affects test builds. As
explained before, allowing test builds only when OF is enabled
improves the quality of these test builds, as the result is then
closer to how the code is built on its intended targets.

Changes since v1:
* Let DRM_MSM depend on OF so that random test builds won't break.

 drivers/gpu/drm/display/Kconfig |    2 +-
 drivers/gpu/drm/msm/Kconfig     |    1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

--- linux-6.9.orig/drivers/gpu/drm/display/Kconfig
+++ linux-6.9/drivers/gpu/drm/display/Kconfig
@@ -3,7 +3,7 @@
 config DRM_DP_AUX_BUS
 	tristate
 	depends on DRM
-	depends on OF || COMPILE_TEST
+	depends on OF
 
 config DRM_DISPLAY_HELPER
 	tristate
--- linux-6.9.orig/drivers/gpu/drm/msm/Kconfig
+++ linux-6.9/drivers/gpu/drm/msm/Kconfig
@@ -6,6 +6,7 @@ config DRM_MSM
 	depends on ARCH_QCOM || SOC_IMX5 || COMPILE_TEST
 	depends on COMMON_CLK
 	depends on IOMMU_SUPPORT
+	depends on OF
 	depends on QCOM_AOSS_QMP || QCOM_AOSS_QMP=n
 	depends on QCOM_OCMEM || QCOM_OCMEM=n
 	depends on QCOM_LLCC || QCOM_LLCC=n


-- 
Jean Delvare
SUSE L3 Support