fbdev: Add Kconfig macro FB_IOMEM_HELPERS_DEFERRED

The new Kconfig macro FB_IOMEM_HELPERS_DEFERRED selects fbdev's
helpers for device I/O memory and deferred I/O. Drivers should
use it if they perform damage updates on device I/O memory.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230828132131.29295-4-tzimmermann@suse.de

diff --git a/drivers/video/fbdev/core/Kconfig b/drivers/video/fbdev/core/Kconfig
index baf7e852c75b60972ab24ddc10ac773b1a1dbf96..e80d6429f76ab9505ba0d5500dd418ed04580dc4 100644 (file)
--- a/drivers/video/fbdev/core/Kconfig
+++ b/drivers/video/fbdev/core/Kconfig
@@ -151,6 +151,12 @@ config FB_IOMEM_HELPERS
        select FB_CFB_FILLRECT
        select FB_CFB_IMAGEBLIT
 
+config FB_IOMEM_HELPERS_DEFERRED
+       bool
+       depends on FB_CORE
+       select FB_DEFERRED_IO
+       select FB_IOMEM_HELPERS
+
 config FB_SYSMEM_HELPERS
        bool
        depends on FB_CORE