OMAP: DSS2: OMAPFB: Implement auto-update mode

Implement auto-update mode for manual-update displays. omapfb driver
uses a delayed work to update the display with a constant rate.

The update mode can be changed via OMAPFB_SET_UPDATE_MODE ioctl, which
previously called omapdss but is now handled inside omapfb, and a new
sysfs file, "update_mode".

The update interval is by default 20 times per second, but can be
changed via "auto_update_freq" module parameter. There is also a new
module parameter "auto_update", which will make omapfb start manual
update displays in auto-update mode.

This auto-update mode can be used for testing if the userspace does not
support manual update displays properly. However, it is a very
inefficient solution, and should be considered more as a hack for
testing than something that could be used as a long term solution.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/video/omap2/omapfb/omapfb.h b/drivers/video/omap2/omapfb/omapfb.h
index f07dbbb08db1..fdf0edeccf4e 100644
--- a/drivers/video/omap2/omapfb/omapfb.h
+++ b/drivers/video/omap2/omapfb/omapfb.h
@@ -74,8 +74,12 @@ struct omapfb_info {
 };
 
 struct omapfb_display_data {
+        struct omapfb2_device *fbdev;
         struct omap_dss_device *dssdev;
         u8 bpp_override;
+        enum omapfb_update_mode update_mode;
+        bool auto_update_work_enabled;
+        struct delayed_work auto_update_work;
 };
 
 struct omapfb2_device {
@@ -96,6 +100,8 @@ struct omapfb2_device {
         struct omap_overlay *overlays[10];
         unsigned num_managers;
         struct omap_overlay_manager *managers[10];
+
+        struct workqueue_struct *auto_update_wq;
 };
 
 struct omapfb_colormode {
@@ -127,6 +133,13 @@ int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
 int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
                 u16 posx, u16 posy, u16 outw, u16 outh);
 
+void omapfb_start_auto_update(struct omapfb2_device *fbdev,
+                struct omap_dss_device *display);
+void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
+                struct omap_dss_device *display);
+int omapfb_get_update_mode(struct fb_info *fbi, enum omapfb_update_mode *mode);
+int omapfb_set_update_mode(struct fb_info *fbi, enum omapfb_update_mode mode);
+
 /* find the display connected to this fb, if any */
 static inline struct omap_dss_device *fb2display(struct fb_info *fbi)
 {