[media] s5p-fimc: Remove registration of video nodes from probe()

Do not register video nodes during FIMC device probe. Also make
fimc_register_m2m_device() public for use by the media device driver.
The video nodes are to be registered during the media device driver
initialization, altogether with the subdev devnodes. The video
capture nodes need to be registered as last ones when the remaining
pipeline elements are already initialized.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/s5p-fimc/fimc-capture.c b/drivers/media/video/s5p-fimc/fimc-capture.c
index 19d398b155fae35865aca59a98994b3d08251d07..6efd952bd5ac4d79316a1eed0cc570f2293f59d4 100644 (file)
--- a/drivers/media/video/s5p-fimc/fimc-capture.c
+++ b/drivers/media/video/s5p-fimc/fimc-capture.c
@@ -905,19 +905,8 @@ int fimc_register_capture_device(struct fimc_dev *fimc)
        if (ret)
                goto err_ent;
 
-       ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
-       if (ret) {
-               v4l2_err(v4l2_dev, "Failed to register video device\n");
-               goto err_vd_reg;
-       }
-
-       v4l2_info(v4l2_dev,
-                 "FIMC capture driver registered as /dev/video%d\n",
-                 vfd->num);
        return 0;
 
-err_vd_reg:
-       media_entity_cleanup(&vfd->entity);
 err_ent:
        video_device_release(vfd);
 err_v4l2_reg:
@@ -934,7 +923,10 @@ void fimc_unregister_capture_device(struct fimc_dev *fimc)
 
        if (vfd) {
                media_entity_cleanup(&vfd->entity);
+               /* Can also be called if video device was
+                  not registered */
                video_unregister_device(vfd);
        }
        kfree(fimc->vid_cap.ctx);
+       fimc->vid_cap.ctx = NULL;
 }

diff --git a/drivers/media/video/s5p-fimc/fimc-core.c b/drivers/media/video/s5p-fimc/fimc-core.c
index 1ae2206b63314b43da66ff07954001c7dbd8fc82..93c4e1a02f90d8562014c41c44b335b25cee1134 100644 (file)
--- a/drivers/media/video/s5p-fimc/fimc-core.c
+++ b/drivers/media/video/s5p-fimc/fimc-core.c
@@ -1494,7 +1494,7 @@ static struct v4l2_m2m_ops m2m_ops = {
        .job_abort      = fimc_job_abort,
 };
 
-static int fimc_register_m2m_device(struct fimc_dev *fimc)
+int fimc_register_m2m_device(struct fimc_dev *fimc)
 {
        struct video_device *vfd;
        struct platform_device *pdev;
@@ -1541,22 +1541,9 @@ static int fimc_register_m2m_device(struct fimc_dev *fimc)
        }
 
        ret = media_entity_init(&vfd->entity, 0, NULL, 0);
-       if (ret)
-               goto err_m2m_r3;
-
-       ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
-       if (ret) {
-               v4l2_err(v4l2_dev,
-                        "%s(): failed to register video device\n", __func__);
-               goto err_m2m_r4;
-       }
-       v4l2_info(v4l2_dev,
-                 "FIMC m2m driver registered as /dev/video%d\n", vfd->num);
+       if (!ret)
+               return 0;
 
-       return 0;
-err_m2m_r4:
-       media_entity_cleanup(&vfd->entity);
-err_m2m_r3:
        v4l2_m2m_release(fimc->m2m.m2m_dev);
 err_m2m_r2:
        video_device_release(fimc->m2m.vfd);
@@ -1566,15 +1553,19 @@ err_m2m_r1:
        return ret;
 }
 
-static void fimc_unregister_m2m_device(struct fimc_dev *fimc)
+void fimc_unregister_m2m_device(struct fimc_dev *fimc)
 {
-       if (fimc == NULL)
+       if (!fimc)
                return;
 
-       v4l2_m2m_release(fimc->m2m.m2m_dev);
+       if (fimc->m2m.m2m_dev)
+               v4l2_m2m_release(fimc->m2m.m2m_dev);
        v4l2_device_unregister(&fimc->m2m.v4l2_dev);
-       media_entity_cleanup(&fimc->m2m.vfd->entity);
-       video_unregister_device(fimc->m2m.vfd);
+       if (fimc->m2m.vfd) {
+               media_entity_cleanup(&fimc->m2m.vfd->entity);
+               /* Can also be called if video device wasn't registered */
+               video_unregister_device(fimc->m2m.vfd);
+       }
 }
 
 static void fimc_clk_put(struct fimc_dev *fimc)
@@ -1739,27 +1730,11 @@ static int fimc_probe(struct platform_device *pdev)
                goto err_pm;
        }
 
-       ret = fimc_register_m2m_device(fimc);
-       if (ret)
-               goto err_alloc;
-
-       /* At least one camera sensor is required to register capture node */
-       if (cap_input_index >= 0) {
-               ret = fimc_register_capture_device(fimc);
-               if (ret)
-                       goto err_m2m;
-       }
-
-       dev_dbg(&pdev->dev, "%s(): fimc-%d registered successfully\n",
-               __func__, fimc->id);
+       dev_dbg(&pdev->dev, "FIMC.%d registered successfully\n", fimc->id);
 
        pm_runtime_put(&pdev->dev);
        return 0;
 
-err_m2m:
-       fimc_unregister_m2m_device(fimc);
-err_alloc:
-       vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
 err_pm:
        pm_runtime_put(&pdev->dev);
 err_irq:
@@ -1773,7 +1748,6 @@ err_req_region:
        kfree(fimc->regs_res);
 err_info:
        kfree(fimc);
-
        return ret;
 }
 
@@ -1862,9 +1836,6 @@ static int __devexit fimc_remove(struct platform_device *pdev)
        fimc_runtime_suspend(&pdev->dev);
        pm_runtime_set_suspended(&pdev->dev);
 
-       fimc_unregister_m2m_device(fimc);
-       fimc_unregister_capture_device(fimc);
-
        vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
 
        clk_disable(fimc->clock[CLK_BUS]);

diff --git a/drivers/media/video/s5p-fimc/fimc-core.h b/drivers/media/video/s5p-fimc/fimc-core.h
index fc99824fe4123da0644db3a9c11f5da5e04f347d..c8a2bab9a6f60119c1342f4fc9682797874aa23d 100644 (file)
--- a/drivers/media/video/s5p-fimc/fimc-core.h
+++ b/drivers/media/video/s5p-fimc/fimc-core.h
@@ -644,6 +644,7 @@ int fimc_set_scaler_info(struct fimc_ctx *ctx);
 int fimc_prepare_config(struct fimc_ctx *ctx, u32 flags);
 int fimc_prepare_addr(struct fimc_ctx *ctx, struct vb2_buffer *vb,
                      struct fimc_frame *frame, struct fimc_addr *paddr);
+int fimc_register_m2m_device(struct fimc_dev *fimc);
 
 /* -----------------------------------------------------*/
 /* fimc-capture.c                                      */