From 19997735b415a8e8b6c794d80a40fbe9078b8a74 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Thu, 24 Sep 2020 20:13:08 +0100
Subject: [PATCH] bcm2708_fb: Hack out dma support

---
 drivers/video/fbdev/bcm2708_fb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/video/fbdev/bcm2708_fb.c
+++ b/drivers/video/fbdev/bcm2708_fb.c
@@ -657,6 +657,8 @@ static long vc_mem_copy(struct bcm2708_f
 	long rc = 0;
 	size_t offset;
 
+return -EFAULT;
+
 	/* restrict this to root user */
 	if (!uid_eq(current_euid(), GLOBAL_ROOT_UID)) {
 		rc = -EFAULT;
@@ -1109,6 +1111,7 @@ static int bcm2708_fb_probe(struct platf
 
 	dev_info(&dev->dev, "FB found %d display(s)\n", num_displays);
 
+#if 0
 	/* Set up the DMA information. Note we have just one set of DMA
 	 * parameters to work with all the FB's so requires synchronising when
 	 * being used
@@ -1141,7 +1144,7 @@ static int bcm2708_fb_probe(struct platf
 			"Failed to request DMA irq\n");
 		goto free_dma_chan;
 	}
-
+#endif
 	rpi_firmware_property(fbdev->fw,
 			      RPI_FIRMWARE_GET_VC_MEMORY,
 			      &gpu_mem, sizeof(gpu_mem));