drm/radeon/kms: properly handle mode id with native mode changes

drm modes are objects with indentifiers.  Make sure to preserve
the mode id when copying mode params.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 17d5659cff03..729207a1e83e 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -183,8 +183,7 @@ static struct drm_display_mode *radeon_fp_native_mode(struct drm_encoder *encode
         if (native_mode->hdisplay != 0 &&
             native_mode->vdisplay != 0 &&
             native_mode->clock != 0) {
-                mode = drm_mode_create(dev);
-                *mode = *native_mode;
+                mode = drm_mode_duplicate(dev, native_mode);
                 mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
                 drm_mode_set_name(mode);
 
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index a9d4e0ab049a..10845f39124a 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -175,11 +175,13 @@ void radeon_rmx_mode_fixup(struct drm_encoder *encoder,
 
         if (mode->hdisplay < native_mode->hdisplay ||
             mode->vdisplay < native_mode->vdisplay) {
+                int mode_id = adjusted_mode->base.id;
                 *adjusted_mode = *native_mode;
                 if (!ASIC_IS_AVIVO(rdev)) {
                         adjusted_mode->hdisplay = mode->hdisplay;
                         adjusted_mode->vdisplay = mode->vdisplay;
                 }
+                adjusted_mode->base.id = mode_id;
         }
 }