drm: panfrost: Remove #ifdef guards for PM related functions

Use the EXPORT_GPL_RUNTIME_DEV_PM_OPS() and pm_ptr() macros to handle
the PM callbacks.

These macros allow the PM functions to be automatically dropped by the
compiler when CONFIG_PM 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@crapouillou.net>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221129191942.138244-3-paul@crapouillou.net

diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
index ee61230..fa1a086 100644 (file)
--- a/drivers/gpu/drm/panfrost/panfrost_device.c
+++ b/drivers/gpu/drm/panfrost/panfrost_device.c
@@ -6,6 +6,7 @@
 #include <linux/reset.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
 
 #include "panfrost_device.h"
@@ -400,8 +401,7 @@ void panfrost_device_reset(struct panfrost_device *pfdev)
        panfrost_job_enable_interrupts(pfdev);
 }
 
-#ifdef CONFIG_PM
-int panfrost_device_resume(struct device *dev)
+static int panfrost_device_resume(struct device *dev)
 {
        struct panfrost_device *pfdev = dev_get_drvdata(dev);
 
@@ -411,7 +411,7 @@ int panfrost_device_resume(struct device *dev)
        return 0;
 }
 
-int panfrost_device_suspend(struct device *dev)
+static int panfrost_device_suspend(struct device *dev)
 {
        struct panfrost_device *pfdev = dev_get_drvdata(dev);
 
@@ -423,4 +423,6 @@ int panfrost_device_suspend(struct device *dev)
 
        return 0;
 }
-#endif
+
+EXPORT_GPL_RUNTIME_DEV_PM_OPS(panfrost_pm_ops, panfrost_device_suspend,
+                             panfrost_device_resume, NULL);

diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index 8b25278..d9ba68c 100644 (file)
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -7,6 +7,7 @@
 
 #include <linux/atomic.h>
 #include <linux/io-pgtable.h>
+#include <linux/pm.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spinlock.h>
 #include <drm/drm_device.h>
@@ -172,8 +173,7 @@ int panfrost_device_init(struct panfrost_device *pfdev);
 void panfrost_device_fini(struct panfrost_device *pfdev);
 void panfrost_device_reset(struct panfrost_device *pfdev);
 
-int panfrost_device_resume(struct device *dev);
-int panfrost_device_suspend(struct device *dev);
+extern const struct dev_pm_ops panfrost_pm_ops;
 
 enum drm_panfrost_exception_type {
        DRM_PANFROST_EXCEPTION_OK = 0x00,

diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 2fa5afe..fa619fe 100644 (file)
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -676,17 +676,12 @@ static const struct of_device_id dt_match[] = {
 };
 MODULE_DEVICE_TABLE(of, dt_match);
 
-static const struct dev_pm_ops panfrost_pm_ops = {
-       SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
-       SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
-};
-
 static struct platform_driver panfrost_driver = {
        .probe          = panfrost_probe,
        .remove         = panfrost_remove,
        .driver         = {
                .name   = "panfrost",
-               .pm     = &panfrost_pm_ops,
+               .pm     = pm_ptr(&panfrost_pm_ops),
                .of_match_table = dt_match,
        },
 };