[PATCH v2 01/10] drm/fb-helper: Call dirty helper after writing to fbdev

[Thomas Zimmermann]

If fbdev uses a shadow framebuffer, call the damage handler. Otherwise
the update might not make it to the screen.

v2:
	* mark virtual screen as dirty (Ville)

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Fixes: 222ec45f4c69 ("drm/fb_helper: Support framebuffers in I/O memory")
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: dri-devel at lists.freedesktop.org
Cc: virtualization at lists.linux-foundation.org
---
 drivers/gpu/drm/drm_fb_helper.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 25edf670867c..9c673f33d222 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -2189,6 +2189,9 @@ static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf,
 	if (ret > 0)
 		*ppos += ret;
 
+	if (ret > 0)
+		drm_fb_helper_dirty(info, 0, 0, info->var.xres_virtual, info->var.yres_virtual);
+
 	return ret ? ret : err;
 }
 
-- 
2.29.2