[PATCH v2] drm/exynos: fimd: clean up pm suspend/resume

[Inki Dae]

This patch removes unnecessary runtime pm related function calls
from fimd_suspend and fimd_resume functions.

Changelog v2:
- use UNIVERSAL_DEV_PM_OPS macro instead.

Signed-off-by: Inki Dae <inki.dae at samsung.com>
Signed-off-by: Kyungmin Park <inki.dae at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c |   59 ++++++------------------------
 1 file changed, 12 insertions(+), 47 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 5d5b97d..35f2c97 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -1003,66 +1003,31 @@ static int fimd_suspend(struct device *dev)
 {
 	struct fimd_context *ctx = get_fimd_context(dev);
 
-	/*
-	 * do not use pm_runtime_suspend(). if pm_runtime_suspend() is
-	 * called here, an error would be returned by that interface
-	 * because the usage_count of pm runtime is more than 1.
-	 */
-	if (!pm_runtime_suspended(dev))
-		return fimd_activate(ctx, false);
-
-	return 0;
+	return fimd_activate(ctx, false);
 }
 
 static int fimd_resume(struct device *dev)
 {
 	struct fimd_context *ctx = get_fimd_context(dev);
+	int ret;
+
+	ret = fimd_activate(ctx, true);
+	if (ret < 0)
+		return ret;
 
 	/*
-	 * if entered to sleep when lcd panel was on, the usage_count
-	 * of pm runtime would still be 1 so in this case, fimd driver
-	 * should be on directly not drawing on pm runtime interface.
+	 * in case of dpms on(standby), fimd_apply function will
+	 * be called by encoder's dpms callback to update fimd's
+	 * registers but in case of sleep wakeup, it's not.
+	 * so fimd_apply function should be called at here.
 	 */
-	if (!pm_runtime_suspended(dev)) {
-		int ret;
-
-		ret = fimd_activate(ctx, true);
-		if (ret < 0)
-			return ret;
-
-		/*
-		 * in case of dpms on(standby), fimd_apply function will
-		 * be called by encoder's dpms callback to update fimd's
-		 * registers but in case of sleep wakeup, it's not.
-		 * so fimd_apply function should be called at here.
-		 */
-		fimd_apply(dev);
-	}
+	fimd_apply(dev);
 
 	return 0;
 }
 #endif
 
-#ifdef CONFIG_PM_RUNTIME
-static int fimd_runtime_suspend(struct device *dev)
-{
-	struct fimd_context *ctx = get_fimd_context(dev);
-
-	return fimd_activate(ctx, false);
-}
-
-static int fimd_runtime_resume(struct device *dev)
-{
-	struct fimd_context *ctx = get_fimd_context(dev);
-
-	return fimd_activate(ctx, true);
-}
-#endif
-
-static const struct dev_pm_ops fimd_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume)
-	SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL)
-};
+UNIVERSAL_DEV_PM_OPS(fimd_pm_ops, fimd_suspend, fimd_resume, NULL);
 
 struct platform_driver fimd_driver = {
 	.probe		= fimd_probe,
-- 
1.7.9.5