drm/sti: Use drm_fb_cma_fbdev_init/fini()

Use drm_fb_cma_fbdev_init() and drm_fb_cma_fbdev_fini() which relies on
the fact that drm_device holds a pointer to the drm_fb_helper structure.
This means that the driver doesn't have to keep track of that.
Also use the drm_fb_helper functions directly.

Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20171115142001.45358-13-noralf@tronnes.org

2 files changed, 5 insertions, 23 deletions

diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
index 88d1dc6408af..55b6967d27e1 100644
--- a/drivers/gpu/drm/sti/sti_drv.c
+++ b/drivers/gpu/drm/sti/sti_drv.c
@@ -17,6 +17,7 @@
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_fb_helper.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_of.h>
 
@@ -138,16 +139,9 @@ static int sti_atomic_check(struct drm_device *dev,
         return ret;
 }
 
-static void sti_output_poll_changed(struct drm_device *ddev)
-{
-        struct sti_private *private = ddev->dev_private;
-
-        drm_fbdev_cma_hotplug_event(private->fbdev);
-}
-
 static const struct drm_mode_config_funcs sti_mode_config_funcs = {
         .fb_create = drm_gem_fb_create,
-        .output_poll_changed = sti_output_poll_changed,
+        .output_poll_changed = drm_fb_helper_output_poll_changed,
         .atomic_check = sti_atomic_check,
         .atomic_commit = drm_atomic_helper_commit,
 };
@@ -230,11 +224,7 @@ static void sti_cleanup(struct drm_device *ddev)
 {
         struct sti_private *private = ddev->dev_private;
 
-        if (private->fbdev) {
-                drm_fbdev_cma_fini(private->fbdev);
-                private->fbdev = NULL;
-        }
-
+        drm_fb_cma_fbdev_fini(ddev);
         drm_kms_helper_poll_fini(ddev);
         component_unbind_all(ddev->dev, ddev);
         kfree(private);
@@ -244,8 +234,6 @@ static void sti_cleanup(struct drm_device *ddev)
 static int sti_bind(struct device *dev)
 {
         struct drm_device *ddev;
-        struct sti_private *private;
-        struct drm_fbdev_cma *fbdev;
         int ret;
 
         ddev = drm_dev_alloc(&sti_driver, dev);
@@ -266,15 +254,10 @@ static int sti_bind(struct device *dev)
 
         drm_mode_config_reset(ddev);
 
-        private = ddev->dev_private;
         if (ddev->mode_config.num_connector) {
-                fbdev = drm_fbdev_cma_init(ddev, 32,
-                                           ddev->mode_config.num_connector);
-                if (IS_ERR(fbdev)) {
+                ret = drm_fb_cma_fbdev_init(ddev, 32, 0);
+                if (ret)
                         DRM_DEBUG_DRIVER("Warning: fails to create fbdev\n");
-                        fbdev = NULL;
-                }
-                private->fbdev = fbdev;
         }
 
         return 0;
diff --git a/drivers/gpu/drm/sti/sti_drv.h b/drivers/gpu/drm/sti/sti_drv.h
index abc49b43566e..4b41142a22e4 100644
--- a/drivers/gpu/drm/sti/sti_drv.h
+++ b/drivers/gpu/drm/sti/sti_drv.h
@@ -24,7 +24,6 @@ struct sti_private {
         struct sti_compositor *compo;
         struct drm_property *plane_zorder_property;
         struct drm_device *drm_dev;
-        struct drm_fbdev_cma *fbdev;
 };
 
 extern struct platform_driver sti_tvout_driver;