drm/exynos: add PM functions for hdmi and mixer

This patch supports the PM for hdmi and mixer. Turn off hdmi and mixer
when suspended, and when resume, will turn on them by hdmi hotplug
detection if hdmi is attached.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index a29a9a8b2312..2f6727a4e768 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -1104,10 +1104,25 @@ static int mixer_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int mixer_suspend(struct device *dev)
+{
+        struct exynos_drm_hdmi_context *drm_hdmi_ctx = get_mixer_context(dev);
+        struct mixer_context *ctx = drm_hdmi_ctx->ctx;
+
+        mixer_poweroff(ctx);
+
+        return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mixer_pm_ops, mixer_suspend, NULL);
+
 struct platform_driver mixer_driver = {
         .driver = {
                 .name = "s5p-mixer",
                 .owner = THIS_MODULE,
+                .pm = &mixer_pm_ops,
         },
         .probe = mixer_probe,
         .remove = __devexit_p(mixer_remove),