HID: add framebuffer support to PicoLCD device

Add framebuffer support to PicoLCD device with use of deferred-io.

Only changed areas of framebuffer get sent to device in order to
save USB bandwidth and especially resources on PicoLCD device or
allow higher refresh rate for a small area. Changed tiles are
determined while updating shadow framebuffer.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 138ba6a277ee..a813ea9c792d 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -265,6 +265,11 @@ config HID_PETALYNX
 config HID_PICOLCD
         tristate "PicoLCD (graphic version)"
         depends on USB_HID
+        select FB_DEFERRED_IO if FB
+        select FB_SYS_FILLRECT if FB
+        select FB_SYS_COPYAREA if FB
+        select FB_SYS_IMAGEBLIT if FB
+        select FB_SYS_FOPS if FB
         ---help---
           This provides support for Minibox PicoLCD devices, currently
           only the graphical ones are supported.
@@ -272,8 +277,8 @@ config HID_PICOLCD
           This includes support for the following device features:
           - Keypad
           - Switching between Firmware and Flash mode
-          Features that are not (yet) supported:
           - Framebuffer for monochrome 256x64 display
+          Features that are not (yet) supported:
           - Backlight control
           - Contrast control
           - IR