[PATCH V2 4/9] drm/exynos: add exynos_dp_panel driver registration to drm driver

[Ajay Kumar]

Register exynos_dp_panel before the list of exynos crtcs and
connectors are probed.

This is needed because exynos_dp_panel should be registered to
the drm_panel list via panel-exynos-dp probe, i.e much before
exynos_dp_bind calls of_drm_find_panel().

Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
---
Changes since V1:
        Added platform_driver_unregister(&exynos_dp_panel_driver) to
        exynos_drm_platform_remove as per Jingoo Han's correction

 drivers/gpu/drm/exynos/exynos_drm_drv.c |   15 +++++++++++++++
 drivers/gpu/drm/exynos/exynos_drm_drv.h |    1 +
 2 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c 
b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 1d653f8..2db7f67 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -530,12 +530,23 @@ static int exynos_drm_platform_probe(struct 
platform_device *pdev)
                goto err_unregister_ipp_drv;
 #endif

+#ifdef CONFIG_DRM_PANEL_EXYNOS_DP
+       ret = platform_driver_register(&exynos_dp_panel_driver);
+       if (ret < 0)
+               goto err_unregister_dp_panel;
+#endif
+
        ret = component_master_add(&pdev->dev, &exynos_drm_ops);
        if (ret < 0)
                DRM_DEBUG_KMS("re-tried by last sub driver probed later.\n");

        return 0;

+#ifdef CONFIG_DRM_PANEL_EXYNOS_DP
+       platform_driver_unregister(&exynos_dp_panel_driver);
+err_unregister_dp_panel:
+#endif
+
 #ifdef CONFIG_DRM_EXYNOS_IPP
 err_unregister_ipp_drv:
        platform_driver_unregister(&ipp_driver);
@@ -587,6 +598,10 @@ err_unregister_fimd_drv:

 static int exynos_drm_platform_remove(struct platform_device *pdev)
 {
+#ifdef CONFIG_DRM_PANEL_EXYNOS_DP
+       platform_driver_unregister(&exynos_dp_panel_driver);
+#endif
+
 #ifdef CONFIG_DRM_EXYNOS_IPP
        exynos_platform_device_ipp_unregister();
        platform_driver_unregister(&ipp_driver);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h 
b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index fc15fe6..b33050d 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -368,4 +368,5 @@ extern struct platform_driver fimc_driver;
 extern struct platform_driver rotator_driver;
 extern struct platform_driver gsc_driver;
 extern struct platform_driver ipp_driver;
+extern struct platform_driver exynos_dp_panel_driver;
 #endif
-- 
1.7.9.5