[media] exynos-gsc: Register v4l2 device

Gscaler video device registration was happening without reference to
a parent v4l2_dev causing probe to fail. The patch creates a parent
v4l2 device and uses it for the gsc m2m video device registration.
This fixes regression introduced with comit commit 1c1d86a1ea07506
[media] v4l2: always require v4l2_dev, rename parent to dev_parent

Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: stable@vger.kernel.org

3 files changed, 10 insertions, 1 deletions

diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c
index fe69eaeb907a..9d0cc04d7ab7 100644
--- a/drivers/media/platform/exynos-gsc/gsc-core.c
+++ b/drivers/media/platform/exynos-gsc/gsc-core.c
@@ -1122,10 +1122,14 @@ static int gsc_probe(struct platform_device *pdev)
                 goto err_clk;
         }
 
-        ret = gsc_register_m2m_device(gsc);
+        ret = v4l2_device_register(dev, &gsc->v4l2_dev);
         if (ret)
                 goto err_clk;
 
+        ret = gsc_register_m2m_device(gsc);
+        if (ret)
+                goto err_v4l2;
+
         platform_set_drvdata(pdev, gsc);
         pm_runtime_enable(dev);
         ret = pm_runtime_get_sync(&pdev->dev);
@@ -1147,6 +1151,8 @@ err_pm:
         pm_runtime_put(dev);
 err_m2m:
         gsc_unregister_m2m_device(gsc);
+err_v4l2:
+        v4l2_device_unregister(&gsc->v4l2_dev);
 err_clk:
         gsc_clk_put(gsc);
         return ret;
@@ -1157,6 +1163,7 @@ static int gsc_remove(struct platform_device *pdev)
         struct gsc_dev *gsc = platform_get_drvdata(pdev);
 
         gsc_unregister_m2m_device(gsc);
+        v4l2_device_unregister(&gsc->v4l2_dev);
 
         vb2_dma_contig_cleanup_ctx(gsc->alloc_ctx);
         pm_runtime_disable(&pdev->dev);
diff --git a/drivers/media/platform/exynos-gsc/gsc-core.h b/drivers/media/platform/exynos-gsc/gsc-core.h
index cc19bba09bd1..76435d3bf62d 100644
--- a/drivers/media/platform/exynos-gsc/gsc-core.h
+++ b/drivers/media/platform/exynos-gsc/gsc-core.h
@@ -343,6 +343,7 @@ struct gsc_dev {
         unsigned long                   state;
         struct vb2_alloc_ctx            *alloc_ctx;
         struct video_device             vdev;
+        struct v4l2_device              v4l2_dev;
 };
 
 /**
diff --git a/drivers/media/platform/exynos-gsc/gsc-m2m.c b/drivers/media/platform/exynos-gsc/gsc-m2m.c
index 40a73f7d20da..e576ff2de3de 100644
--- a/drivers/media/platform/exynos-gsc/gsc-m2m.c
+++ b/drivers/media/platform/exynos-gsc/gsc-m2m.c
@@ -751,6 +751,7 @@ int gsc_register_m2m_device(struct gsc_dev *gsc)
         gsc->vdev.release       = video_device_release_empty;
         gsc->vdev.lock          = &gsc->lock;
         gsc->vdev.vfl_dir       = VFL_DIR_M2M;
+        gsc->vdev.v4l2_dev      = &gsc->v4l2_dev;
         snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m",
                                         GSC_MODULE_NAME, gsc->id);