linux-kernel - [PATCH v2 11/26] drm: bridge/dw-hdmi: Remove #ifdef guards for PM related functions

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Date:   Tue, 29 Nov 2022 19:17:18 +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>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Subject: [PATCH v2 11/26] drm: bridge/dw-hdmi: 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.

The #ifdef IS_NOT_BROKEN guard was also changed to a
IS_ENABLED(IS_NOT_BROKEN) check within the PM functions.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
Note:
 Checkpatch complains as I replaced a "#if defined(IS_NOT_BROKEN)"
 to a "if (IS_ENABLED(IS_NOT_BROKEN))".
 I don't really know how to make it better so I left it like that.

Cc: Andrzej Hajda <andrzej.hajda@...el.com>
Cc: Neil Armstrong <neil.armstrong@...aro.org>
Cc: Robert Foss <robert.foss@...aro.org>
Cc: Laurent Pinchart <Laurent.pinchart@...asonboard.com>
Cc: Jonas Karlman <jonas@...boo.se>
Cc: Jernej Skrabec <jernej.skrabec@...il.com>
---
 .../gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
index 4efb62bcdb63..2ae231af7e4b 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
@@ -593,7 +593,6 @@ static int snd_dw_hdmi_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#if defined(CONFIG_PM_SLEEP) && defined(IS_NOT_BROKEN)
 /*
  * This code is fine, but requires implementation in the dw_hdmi_trigger()
  * method which is currently missing as I have no way to test this.
@@ -602,7 +601,8 @@ static int snd_dw_hdmi_suspend(struct device *dev)
 {
 	struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
 
-	snd_power_change_state(dw->card, SNDRV_CTL_POWER_D3cold);
+	if (IS_ENABLED(IS_NOT_BROKEN))
+		snd_power_change_state(dw->card, SNDRV_CTL_POWER_D3cold);
 
 	return 0;
 }
@@ -611,24 +611,21 @@ static int snd_dw_hdmi_resume(struct device *dev)
 {
 	struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
 
-	snd_power_change_state(dw->card, SNDRV_CTL_POWER_D0);
+	if (IS_ENABLED(IS_NOT_BROKEN))
+		snd_power_change_state(dw->card, SNDRV_CTL_POWER_D0);
 
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(snd_dw_hdmi_pm, snd_dw_hdmi_suspend,
-			 snd_dw_hdmi_resume);
-#define PM_OPS &snd_dw_hdmi_pm
-#else
-#define PM_OPS NULL
-#endif
+static DEFINE_SIMPLE_DEV_PM_OPS(snd_dw_hdmi_pm_ops, snd_dw_hdmi_suspend,
+				snd_dw_hdmi_resume);
 
 static struct platform_driver snd_dw_hdmi_driver = {
 	.probe	= snd_dw_hdmi_probe,
 	.remove	= snd_dw_hdmi_remove,
 	.driver	= {
 		.name = DRIVER_NAME,
-		.pm = PM_OPS,
+		.pm = pm_sleep_ptr(&snd_dw_hdmi_pm_ops),
 	},
 };
 
-- 
2.35.1