drm/tidss: Run DRM default client setup

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 tidss 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 <tzimmermann@suse.de>
Cc: Jyri Sarha <jyri.sarha@iki.fi>
Cc: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-42-tzimmermann@suse.de

drivers/gpu/drm/tidss/Kconfig

@@ -2,6 +2,7 @@ config DRM_TIDSS
 	tristate "DRM Support for TI Keystone"
 	depends on DRM && OF
 	depends on ARM || ARM64 || COMPILE_TEST
+	select DRM_CLIENT_SELECTION
 	select DRM_KMS_HELPER
 	select DRM_DISPLAY_HELPER
 	select DRM_BRIDGE_CONNECTOR

drivers/gpu/drm/tidss/tidss_drv.c

@@ -11,6 +11,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_client_setup.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fbdev_dma.h>
@@ -109,6 +110,7 @@ static const struct drm_driver tidss_driver = {
 	.fops			= &tidss_fops,
 	.release		= tidss_release,
 	DRM_GEM_DMA_DRIVER_OPS_VMAP,
+	DRM_FBDEV_DMA_DRIVER_OPS,
 	.name			= "tidss",
 	.desc			= "TI Keystone DSS",
 	.date			= "20180215",
@@ -186,7 +188,7 @@ static int tidss_probe(struct platform_device *pdev)
 		goto err_irq_uninstall;
 	}
 
-	drm_fbdev_dma_setup(ddev, 32);
+	drm_client_setup(ddev, NULL);
 
 	dev_dbg(dev, "%s done\n", __func__);