This is a note to let you know that I've just added the patch titled
drm/exynos: fbdev: Remove offset into screen_buffer
to the 7.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-exynos-fbdev-remove-offset-into-screen_buffer.patch
and it can be found in the queue-7.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 760bbc58c2c833dec0ee38dd959f4f2f4084fc57 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <[email protected]>
Date: Mon, 11 May 2026 13:54:31 +0200
Subject: drm/exynos: fbdev: Remove offset into screen_buffer
From: Thomas Zimmermann <[email protected]>
commit 760bbc58c2c833dec0ee38dd959f4f2f4084fc57 upstream.
The screen_buffer field in struct fb_info contains the kernel address
of the first byte of framebuffer memory. Do not add the display offset.
This offset only describes scrolling during scanout.
Signed-off-by: Thomas Zimmermann <[email protected]>
Fixes: 19c8b8343d9c ("drm/exynos: fixed overlay data updating.")
Tested-by: Marek Szyprowski <[email protected]>
Acked-by: Marek Szyprowski <[email protected]>
Signed-off-by: Inki Dae <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: <[email protected]> # v3.2+
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -61,17 +61,13 @@ static int exynos_drm_fbdev_update(struc
struct fb_info *fbi = helper->info;
struct drm_framebuffer *fb = helper->fb;
unsigned int size = fb->width * fb->height * fb->format->cpp[0];
- unsigned long offset;
fbi->fbops = &exynos_drm_fb_ops;
drm_fb_helper_fill_info(fbi, helper, sizes);
- offset = fbi->var.xoffset * fb->format->cpp[0];
- offset += fbi->var.yoffset * fb->pitches[0];
-
fbi->flags |= FBINFO_VIRTFB;
- fbi->screen_buffer = exynos_gem->kvaddr + offset;
+ fbi->screen_buffer = exynos_gem->kvaddr;
fbi->screen_size = size;
fbi->fix.smem_len = size;
Patches currently in stable-queue which might be from [email protected] are
queue-7.1/drm-tests-shmem-set-dma-mask-to-64-bit-in-drm_gem_sh.patch
queue-7.1/drm-exynos-fbdev-remove-offset-into-screen_buffer.patch
queue-7.1/drm-tegra-fbdev-remove-offset-into-framebuffer-memory.patch
