[PATCH 09/16] drm/mgag200: Add an crtc_disable callback to the crtc helper funcs

[Egbert Eich]

Signed-off-by: Egbert Eich <eich at suse.com>
---
 drivers/gpu/drm/mgag200/mgag200_mode.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c 
b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 251784a..2fe1f64 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1251,6 +1251,24 @@ static void mga_crtc_destroy(struct drm_crtc *crtc)
        kfree(mga_crtc);
 }

+static void mga_crtc_disable(struct drm_crtc *crtc)
+{
+       int ret;
+       DRM_DEBUG_KMS("\n");
+       mga_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+       if (crtc->fb) {
+               struct mga_framebuffer *mga_fb = to_mga_framebuffer(crtc->fb);
+               struct drm_gem_object *obj = mga_fb->obj;
+               struct mgag200_bo *bo = gem_to_mga_bo(obj);
+               ret = mgag200_bo_reserve(bo, false);
+               if (ret)
+                       return;
+               mgag200_bo_push_sysram(bo);
+               mgag200_bo_unreserve(bo);
+       }
+       crtc->fb = NULL;
+}
+
 /* These provide the minimum set of functions required to handle a CRTC */
 static const struct drm_crtc_funcs mga_crtc_funcs = {
        .cursor_set = mga_crtc_cursor_set,
@@ -1261,6 +1279,7 @@ static const struct drm_crtc_funcs mga_crtc_funcs = {
 };

 static const struct drm_crtc_helper_funcs mga_helper_funcs = {
+       .disable = mga_crtc_disable,
        .dpms = mga_crtc_dpms,
        .mode_fixup = mga_crtc_mode_fixup,
        .mode_set = mga_crtc_mode_set,
-- 
1.8.1.4