From: Luca Weiss <luca.weiss@fairphone.com>
Date: Wed, 8 Apr 2026 12:04:28 +0000 (+0200)
Subject: video: simplefb: Map framebuffer region on probe on ARM64
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1c8b592611fc7b6bacf10226cfada6620ca19011;p=thirdparty%2Fu-boot.git

video: simplefb: Map framebuffer region on probe on ARM64

The framebuffer buffer might not be mapped on some devices.

This is #ifdef'ed for ARM64 since mmu_map_region() is not defined for
any other architecture.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Acked-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
---

diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c
index 8d0772d4e51..4d238b936ac 100644
--- a/drivers/video/simplefb.c
+++ b/drivers/video/simplefb.c
@@ -9,6 +9,8 @@
 #include <log.h>
 #include <video.h>
 #include <asm/global_data.h>
+#include <asm/system.h>
+#include <linux/sizes.h>
 
 static int simple_video_probe(struct udevice *dev)
 {
@@ -37,6 +39,13 @@ static int simple_video_probe(struct udevice *dev)
 	plat->base = base;
 	plat->size = size;
 
+#ifdef CONFIG_ARM64
+	/* The framebuffer buffer might not be mapped on some devices */
+	if (plat->base % SZ_4K)
+		log_warning("Framebuffer base %lx is not 4k aligned!\n", plat->base);
+	mmu_map_region((phys_addr_t)plat->base, (phys_addr_t)ALIGN(plat->size, SZ_4K), false);
+#endif
+
 	video_set_flush_dcache(dev, true);
 
 	debug("%s: Query resolution...\n", __func__);