drm/vc4: 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: Eric Anholt <eric@anholt.net>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20171115142001.45358-18-noralf@tronnes.org

3 files changed, 6 insertions, 27 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index e3c29729da2e..ceb385fd69c5 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -111,13 +111,6 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
         return 0;
 }
 
-static void vc4_lastclose(struct drm_device *dev)
-{
-        struct vc4_dev *vc4 = to_vc4_dev(dev);
-
-        drm_fbdev_cma_restore_mode(vc4->fbdev);
-}
-
 static const struct vm_operations_struct vc4_vm_ops = {
         .fault = vc4_fault,
         .open = drm_gem_vm_open,
@@ -159,7 +152,7 @@ static struct drm_driver vc4_drm_driver = {
                             DRIVER_HAVE_IRQ |
                             DRIVER_RENDER |
                             DRIVER_PRIME),
-        .lastclose = vc4_lastclose,
+        .lastclose = drm_fb_helper_lastclose,
         .irq_handler = vc4_irq,
         .irq_preinstall = vc4_irq_preinstall,
         .irq_postinstall = vc4_irq_postinstall,
@@ -301,12 +294,10 @@ static void vc4_drm_unbind(struct device *dev)
 {
         struct platform_device *pdev = to_platform_device(dev);
         struct drm_device *drm = platform_get_drvdata(pdev);
-        struct vc4_dev *vc4 = to_vc4_dev(drm);
 
         drm_dev_unregister(drm);
 
-        if (vc4->fbdev)
-                drm_fbdev_cma_fini(vc4->fbdev);
+        drm_fb_cma_fbdev_fini(drm);
 
         drm_mode_config_cleanup(drm);
 
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 9c0d380c96f2..3af22936d9b3 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -39,8 +39,6 @@ struct vc4_dev {
         struct vc4_dsi *dsi1;
         struct vc4_vec *vec;
 
-        struct drm_fbdev_cma *fbdev;
-
         struct vc4_hang_state *hang_state;
 
         /* The kernel-space BO cache.  Tracks buffers that have been
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 50c4959b5bd3..4256f294c346 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -19,17 +19,11 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_plane_helper.h>
+#include <drm/drm_fb_helper.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include "vc4_drv.h"
 
-static void vc4_output_poll_changed(struct drm_device *dev)
-{
-        struct vc4_dev *vc4 = to_vc4_dev(dev);
-
-        drm_fbdev_cma_hotplug_event(vc4->fbdev);
-}
-
 static void
 vc4_atomic_complete_commit(struct drm_atomic_state *state)
 {
@@ -194,7 +188,7 @@ static struct drm_framebuffer *vc4_fb_create(struct drm_device *dev,
 }
 
 static const struct drm_mode_config_funcs vc4_mode_funcs = {
-        .output_poll_changed = vc4_output_poll_changed,
+        .output_poll_changed = drm_fb_helper_output_poll_changed,
         .atomic_check = drm_atomic_helper_check,
         .atomic_commit = vc4_atomic_commit,
         .fb_create = vc4_fb_create,
@@ -224,12 +218,8 @@ int vc4_kms_load(struct drm_device *dev)
 
         drm_mode_config_reset(dev);
 
-        if (dev->mode_config.num_connector) {
-                vc4->fbdev = drm_fbdev_cma_init(dev, 32,
-                                                dev->mode_config.num_connector);
-                if (IS_ERR(vc4->fbdev))
-                        vc4->fbdev = NULL;
-        }
+        if (dev->mode_config.num_connector)
+                drm_fb_cma_fbdev_init(dev, 32, 0);
 
         drm_kms_helper_poll_init(dev);