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>
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 138ba6a..a813ea9 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -265,6 +265,11 @@
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 @@
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