[media] s5p-fimc: Add runtime PM support in the mem-to-mem driver

[deliverable/linux.git] / drivers / media / video / s5p-fimc / fimc-capture.c

diff --git a/drivers/media/video/s5p-fimc/fimc-capture.c b/drivers/media/video/s5p-fimc/fimc-capture.c
index 287d099caf834fb9d97ef3ba0298b9b314eefef1..a2f7da9c7f6070730f4ae21d9ce99d1043b2c8d4 100644 (file)
--- a/drivers/media/video/s5p-fimc/fimc-capture.c
+++ b/drivers/media/video/s5p-fimc/fimc-capture.c
@@ -17,6 +17,7 @@
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <linux/clk.h>
@@ -271,6 +272,16 @@ static int stop_streaming(struct vb2_queue *q)
        return fimc_stop_capture(fimc);
 }
 
+int fimc_capture_suspend(struct fimc_dev *fimc)
+{
+       return -EBUSY;
+}
+
+int fimc_capture_resume(struct fimc_dev *fimc)
+{
+       return 0;
+}
+
 static unsigned int get_plane_size(struct fimc_frame *fr, unsigned int plane)
 {
        if (!fr || plane >= fr->fmt->memplanes)
@@ -396,9 +407,14 @@ static int fimc_capture_open(struct file *file)
        if (fimc_m2m_active(fimc))
                return -EBUSY;
 
+       ret = pm_runtime_get_sync(&fimc->pdev->dev);
+       if (ret)
+               return ret;
+
        if (++fimc->vid_cap.refcnt == 1) {
                ret = fimc_isp_subdev_init(fimc, 0);
                if (ret) {
+                       pm_runtime_put_sync(&fimc->pdev->dev);
                        fimc->vid_cap.refcnt--;
                        return -EIO;
                }
@@ -426,6 +442,8 @@ static int fimc_capture_close(struct file *file)
                fimc_subdev_unregister(fimc);
        }
 
+       pm_runtime_put(&fimc->pdev->dev);
+
        return 0;
 }