4 files changed, 42 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_core.c b/drivers/gpu/drm/exynos/exynos_drm_core.c
index 661a03571d0c..d08a55896d50 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_core.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_core.c
@@ -193,6 +193,9 @@ int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv)
                         return err;
                 }
 
+                /* setup possible_clones. */
+                exynos_drm_encoder_setup(drm_dev);
+
                 /*
                  * if any specific driver such as fimd or hdmi driver called
                  * exynos_drm_subdrv_register() later than drm_load(),
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 2ef12aa30303..76a111f54ccb 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -33,6 +33,7 @@
 
 #include "exynos_drm_drv.h"
 #include "exynos_drm_crtc.h"
+#include "exynos_drm_encoder.h"
 #include "exynos_drm_fbdev.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_gem.h"
@@ -99,6 +100,9 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
         if (ret)
                 goto err_vblank;
 
+        /* setup possible_clones. */
+        exynos_drm_encoder_setup(dev);
+
         /*
          * create and configure fb helper and also exynos specific
          * fbdev object.
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index 86b93dde219a..ef4754f1519b 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -195,6 +195,40 @@ static struct drm_encoder_funcs exynos_encoder_funcs = {
         .destroy = exynos_drm_encoder_destroy,
 };
 
+static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
+{
+        struct drm_encoder *clone;
+        struct drm_device *dev = encoder->dev;
+        struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
+        struct exynos_drm_display_ops *display_ops =
+                                exynos_encoder->manager->display_ops;
+        unsigned int clone_mask = 0;
+        int cnt = 0;
+
+        list_for_each_entry(clone, &dev->mode_config.encoder_list, head) {
+                switch (display_ops->type) {
+                case EXYNOS_DISPLAY_TYPE_LCD:
+                case EXYNOS_DISPLAY_TYPE_HDMI:
+                        clone_mask |= (1 << (cnt++));
+                        break;
+                default:
+                        continue;
+                }
+        }
+
+        return clone_mask;
+}
+
+void exynos_drm_encoder_setup(struct drm_device *dev)
+{
+        struct drm_encoder *encoder;
+
+        DRM_DEBUG_KMS("%s\n", __FILE__);
+
+        list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
+                encoder->possible_clones = exynos_drm_encoder_clones(encoder);
+}
+
 struct drm_encoder *
 exynos_drm_encoder_create(struct drm_device *dev,
                            struct exynos_drm_manager *manager,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.h b/drivers/gpu/drm/exynos/exynos_drm_encoder.h
index 97b087a51cb6..eb7d2316847e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.h
@@ -30,6 +30,7 @@
 
 struct exynos_drm_manager;
 
+void exynos_drm_encoder_setup(struct drm_device *dev);
 struct drm_encoder *exynos_drm_encoder_create(struct drm_device *dev,
                                                struct exynos_drm_manager *mgr,
                                                unsigned int possible_crtcs);