drm/imx: 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: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20171115142001.45358-8-noralf@tronnes.org

1 files changed, 6 insertions, 27 deletions

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 17d2f3a1c562..3f2b4afcb8a7 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -38,7 +38,6 @@
 struct imx_drm_device {
         struct drm_device                       *drm;
         unsigned int                            pipes;
-        struct drm_fbdev_cma                    *fbhelper;
         struct drm_atomic_state                 *state;
 };
 
@@ -47,13 +46,6 @@ static int legacyfb_depth = 16;
 module_param(legacyfb_depth, int, 0444);
 #endif
 
-static void imx_drm_driver_lastclose(struct drm_device *drm)
-{
-        struct imx_drm_device *imxdrm = drm->dev_private;
-
-        drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
-}
-
 DEFINE_DRM_GEM_CMA_FOPS(imx_drm_driver_fops);
 
 void imx_drm_connector_destroy(struct drm_connector *connector)
@@ -69,13 +61,6 @@ void imx_drm_encoder_destroy(struct drm_encoder *encoder)
 }
 EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
 
-static void imx_drm_output_poll_changed(struct drm_device *drm)
-{
-        struct imx_drm_device *imxdrm = drm->dev_private;
-
-        drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
-}
-
 static int imx_drm_atomic_check(struct drm_device *dev,
                                 struct drm_atomic_state *state)
 {
@@ -107,7 +92,7 @@ static int imx_drm_atomic_check(struct drm_device *dev,
 
 static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
         .fb_create = drm_gem_fb_create,
-        .output_poll_changed = imx_drm_output_poll_changed,
+        .output_poll_changed = drm_fb_helper_output_poll_changed,
         .atomic_check = imx_drm_atomic_check,
         .atomic_commit = drm_atomic_helper_commit,
 };
@@ -186,7 +171,7 @@ static const struct drm_ioctl_desc imx_drm_ioctls[] = {
 static struct drm_driver imx_drm_driver = {
         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
                                   DRIVER_ATOMIC,
-        .lastclose              = imx_drm_driver_lastclose,
+        .lastclose              = drm_fb_helper_lastclose,
         .gem_free_object_unlocked = drm_gem_cma_free_object,
         .gem_vm_ops             = &drm_gem_cma_vm_ops,
         .dumb_create            = drm_gem_cma_dumb_create,
@@ -298,12 +283,9 @@ static int imx_drm_bind(struct device *dev)
                 dev_warn(dev, "Invalid legacyfb_depth.  Defaulting to 16bpp\n");
                 legacyfb_depth = 16;
         }
-        imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth, MAX_CRTC);
-        if (IS_ERR(imxdrm->fbhelper)) {
-                ret = PTR_ERR(imxdrm->fbhelper);
-                imxdrm->fbhelper = NULL;
+        ret = drm_fb_cma_fbdev_init(drm, legacyfb_depth, MAX_CRTC);
+        if (ret)
                 goto err_unbind;
-        }
 #endif
 
         drm_kms_helper_poll_init(drm);
@@ -317,8 +299,7 @@ static int imx_drm_bind(struct device *dev)
 err_fbhelper:
         drm_kms_helper_poll_fini(drm);
 #if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
-        if (imxdrm->fbhelper)
-                drm_fbdev_cma_fini(imxdrm->fbhelper);
+        drm_fb_cma_fbdev_fini(drm);
 err_unbind:
 #endif
         component_unbind_all(drm->dev, drm);
@@ -333,14 +314,12 @@ err_unref:
 static void imx_drm_unbind(struct device *dev)
 {
         struct drm_device *drm = dev_get_drvdata(dev);
-        struct imx_drm_device *imxdrm = drm->dev_private;
 
         drm_dev_unregister(drm);
 
         drm_kms_helper_poll_fini(drm);
 
-        if (imxdrm->fbhelper)
-                drm_fbdev_cma_fini(imxdrm->fbhelper);
+        drm_fb_cma_fbdev_fini(drm);
 
         drm_mode_config_cleanup(drm);