drm/mxsfb: Remove generic DRM drivers in probe function

Use aperture helpers to remove all generic graphics drivers before
loading mxsfb. Makes mxsfb compatible with simpledrm.

Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20250305140929.174398-1-dario.binacchi@amarulasolutions.com

diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
index 377d4c4c9979ad9538cfec5464827a82936f811b..c183b1112bc4e9fe4f3b048a2b6e4c98d1d47cb3 100644 (file)
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
@@ -8,6 +8,7 @@
  * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
  */
 
+#include <linux/aperture.h>
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
@@ -359,6 +360,15 @@ static int mxsfb_probe(struct platform_device *pdev)
        if (ret)
                goto err_free;
 
+       /*
+        * Remove early framebuffers (ie. simplefb). The framebuffer can be
+        * located anywhere in RAM
+        */
+       ret = aperture_remove_all_conflicting_devices(mxsfb_driver.name);
+       if (ret)
+               return dev_err_probe(&pdev->dev, ret,
+                                    "can't kick out existing framebuffers\n");
+
        ret = drm_dev_register(drm, 0);
        if (ret)
                goto err_unload;