linux-kernel - [PATCH v2 13/26] drm: fsl-dcu: Remove #ifdef guards for PM related functions

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Message-Id: <20221129191733.137897-14-paul@crapouillou.net>
Date:   Tue, 29 Nov 2022 19:17:20 +0000
From:   Paul Cercueil <paul@...pouillou.net>
To:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>,
        Stefan Agner <stefan@...er.ch>,
        Alison Wang <alison.wang@....com>
Subject: [PATCH v2 13/26] drm: fsl-dcu: Remove #ifdef guards for PM related functions

Use the DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() macros to handle
the .suspend/.resume callbacks.

These macros allow the suspend and resume functions to be automatically
dropped by the compiler when CONFIG_SUSPEND is disabled, without having
to use #ifdef guards.

This has the advantage of always compiling these functions in,
independently of any Kconfig option. Thanks to that, bugs and other
regressions are subsequently easier to catch.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
Cc: Stefan Agner <stefan@...er.ch>
Cc: Alison Wang <alison.wang@....com>
---
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
index 8579c7629f5e..474ad45c73be 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -164,7 +164,6 @@ static const struct drm_driver fsl_dcu_drm_driver = {
 	.minor			= 1,
 };
 
-#ifdef CONFIG_PM_SLEEP
 static int fsl_dcu_drm_pm_suspend(struct device *dev)
 {
 	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
@@ -209,11 +208,9 @@ static int fsl_dcu_drm_pm_resume(struct device *dev)
 
 	return 0;
 }
-#endif
 
-static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
-};
+static DEFINE_SIMPLE_DEV_PM_OPS(fsl_dcu_drm_pm_ops,
+				fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume);
 
 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
 	.name = "ls1021a",
@@ -363,7 +360,7 @@ static struct platform_driver fsl_dcu_drm_platform_driver = {
 	.remove		= fsl_dcu_drm_remove,
 	.driver		= {
 		.name	= "fsl-dcu",
-		.pm	= &fsl_dcu_drm_pm_ops,
+		.pm	= pm_sleep_ptr(&fsl_dcu_drm_pm_ops),
 		.of_match_table = fsl_dcu_of_match,
 	},
 };
-- 
2.35.1