drm/exynos: fixed edid data setting at vidi connection request

edid data from user should be allocated and copied into vidi context and also
freed with disconnection.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 31 insertions, 7 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.c b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
index dbbf2fc29ab6..1d7d03084acf 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_vidi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
@@ -557,6 +557,8 @@ int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
         struct exynos_drm_manager *manager;
         struct exynos_drm_display_ops *display_ops;
         struct drm_exynos_vidi_connection *vidi = data;
+        struct edid *raw_edid;
+        int edid_len;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
@@ -565,11 +567,6 @@ int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
                 return -EINVAL;
         }
 
-        if (!vidi->edid) {
-                DRM_DEBUG_KMS("edid data is null.\n");
-                return -EINVAL;
-        }
-
         if (vidi->connection > 1) {
                 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
                 return -EINVAL;
@@ -596,8 +593,30 @@ int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
                 return -EINVAL;
         }
 
-        if (vidi->connection)
-                ctx->raw_edid = (struct edid *)vidi->edid;
+        if (vidi->connection) {
+                if (!vidi->edid) {
+                        DRM_DEBUG_KMS("edid data is null.\n");
+                        return -EINVAL;
+                }
+                raw_edid = (struct edid *)vidi->edid;
+                edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
+                ctx->raw_edid = kzalloc(edid_len, GFP_KERNEL);
+                if (!ctx->raw_edid) {
+                        DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
+                        return -ENOMEM;
+                }
+                memcpy(ctx->raw_edid, raw_edid, edid_len);
+        } else {
+                /*
+                 * with connection = 0, free raw_edid
+                 * only if raw edid data isn't same as fake data.
+                 */
+                if (ctx->raw_edid && ctx->raw_edid !=
+                                (struct edid *)fake_edid_info) {
+                        kfree(ctx->raw_edid);
+                        ctx->raw_edid = NULL;
+                }
+        }
 
         ctx->connected = vidi->connection;
         drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
@@ -649,6 +668,11 @@ static int __devexit vidi_remove(struct platform_device *pdev)
 
         exynos_drm_subdrv_unregister(&ctx->subdrv);
 
+        if (ctx->raw_edid != (struct edid *)fake_edid_info) {
+                kfree(ctx->raw_edid);
+                ctx->raw_edid = NULL;
+        }
+
         kfree(ctx);
 
         return 0;