Call drm_client_setup() to run the kernel's default client setup
for DRM. Set fbdev_probe in struct drm_driver, so that the client
setup can start the common fbdev client.

The rz-du driver specifies a preferred color mode of 32. As this
is the default if no format has been given, leave it out entirely.

v5:
- select DRM_CLIENT_SELECTION

Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Biju Das <biju.das...@bp.renesas.com>
Tested-by: Biju Das <biju.das...@bp.renesas.com>
---
 drivers/gpu/drm/renesas/rz-du/Kconfig        | 1 +
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/renesas/rz-du/Kconfig 
b/drivers/gpu/drm/renesas/rz-du/Kconfig
index 89bdb598e0ae..7c1817240846 100644
--- a/drivers/gpu/drm/renesas/rz-du/Kconfig
+++ b/drivers/gpu/drm/renesas/rz-du/Kconfig
@@ -4,6 +4,7 @@ config DRM_RZG2L_DU
        depends on ARCH_RZG2L || COMPILE_TEST
        depends on DRM && OF
        depends on VIDEO_RENESAS_VSP1
+       select DRM_CLIENT_SELECTION
        select DRM_GEM_DMA_HELPER
        select DRM_KMS_HELPER
        select DRM_DISPLAY_HELPER
diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c 
b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
index bc7c381f92ac..bbd7003335da 100644
--- a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
@@ -13,6 +13,7 @@
 #include <linux/platform_device.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_client_setup.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fbdev_dma.h>
 #include <drm/drm_gem_dma_helper.h>
@@ -79,6 +80,7 @@ DEFINE_DRM_GEM_DMA_FOPS(rzg2l_du_fops);
 static const struct drm_driver rzg2l_du_driver = {
        .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
        .dumb_create            = rzg2l_du_dumb_create,
+       DRM_FBDEV_DMA_DRIVER_OPS,
        .fops                   = &rzg2l_du_fops,
        .name                   = "rzg2l-du",
        .desc                   = "Renesas RZ/G2L Display Unit",
@@ -160,7 +162,7 @@ static int rzg2l_du_probe(struct platform_device *pdev)
 
        drm_info(&rcdu->ddev, "Device %s probed\n", dev_name(&pdev->dev));
 
-       drm_fbdev_dma_setup(&rcdu->ddev, 32);
+       drm_client_setup(&rcdu->ddev, NULL);
 
        return 0;
 
-- 
2.46.0

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