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@xxxxxx>
---
drivers/video/omap2/omapfb/omapfb-ioctl.c | 72 ++++++++--------
drivers/video/omap2/omapfb/omapfb-main.c | 130 ++++++++++++++++++++++++----
drivers/video/omap2/omapfb/omapfb-sysfs.c | 34 ++++++++
drivers/video/omap2/omapfb/omapfb.h | 13 +++
4 files changed, 194 insertions(+), 55 deletions(-)
diff --git a/drivers/video/omap2/omapfb/omapfb-ioctl.c b/drivers/video/omap2/omapfb/omapfb-ioctl.c
index cff4503..6b1ac23 100644
--- a/drivers/video/omap2/omapfb/omapfb-ioctl.c
+++ b/drivers/video/omap2/omapfb/omapfb-ioctl.c
@@ -316,67 +316,67 @@ int omapfb_update_window(struct fb_info *fbi,
}
EXPORT_SYMBOL(omapfb_update_window);
-static int omapfb_set_update_mode(struct fb_info *fbi,
+int omapfb_set_update_mode(struct fb_info *fbi,
enum omapfb_update_mode mode)
{
struct omap_dss_device *display = fb2display(fbi);
- enum omap_dss_update_mode um;
+ struct omapfb_info *ofbi = FB2OFB(fbi);
+ struct omapfb2_device *fbdev = ofbi->fbdev;
+ struct omapfb_display_data *d;
int r;
- if (!display || !display->driver->set_update_mode)
+ if (!display)
return -EINVAL;
- switch (mode) {
- case OMAPFB_UPDATE_DISABLED:
- um = OMAP_DSS_UPDATE_DISABLED;
- break;
+ if (mode != OMAPFB_AUTO_UPDATE && mode != OMAPFB_MANUAL_UPDATE)
+ return -EINVAL;
- case OMAPFB_AUTO_UPDATE:
- um = OMAP_DSS_UPDATE_AUTO;
- break;
+ omapfb_lock(fbdev);
- case OMAPFB_MANUAL_UPDATE:
- um = OMAP_DSS_UPDATE_MANUAL;
- break;
+ d = get_display_data(fbdev, display);
- default:
- return -EINVAL;
+ if (d->update_mode == mode) {
+ omapfb_unlock(fbdev);
+ return 0;
}
- r = display->driver->set_update_mode(display, um);
+ r = 0;
+
+ if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
+ if (mode == OMAPFB_AUTO_UPDATE)
+ omapfb_start_auto_update(fbdev, display);
+ else /* MANUAL_UPDATE */
+ omapfb_stop_auto_update(fbdev, display);
+
+ d->update_mode = mode;
+ } else { /* AUTO_UPDATE */
+ if (mode == OMAPFB_MANUAL_UPDATE)
+ r = -EINVAL;
+ }
+
+ omapfb_unlock(fbdev);
return r;
}
-static int omapfb_get_update_mode(struct fb_info *fbi,
+int omapfb_get_update_mode(struct fb_info *fbi,
enum omapfb_update_mode *mode)
{
struct omap_dss_device *display = fb2display(fbi);
- enum omap_dss_update_mode m;
+ struct omapfb_info *ofbi = FB2OFB(fbi);
+ struct omapfb2_device *fbdev = ofbi->fbdev;
+ struct omapfb_display_data *d;
if (!display)
return -EINVAL;
- if (!display->driver->get_update_mode) {
- *mode = OMAPFB_AUTO_UPDATE;
- return 0;
- }
+ omapfb_lock(fbdev);
- m = display->driver->get_update_mode(display);
+ d = get_display_data(fbdev, display);
- switch (m) {
- case OMAP_DSS_UPDATE_DISABLED:
- *mode = OMAPFB_UPDATE_DISABLED;
- break;
- case OMAP_DSS_UPDATE_AUTO:
- *mode = OMAPFB_AUTO_UPDATE;
- break;
- case OMAP_DSS_UPDATE_MANUAL:
- *mode = OMAPFB_MANUAL_UPDATE;
- break;
- default:
- BUG();
- }
+ *mode = d->update_mode;
+
+ omapfb_unlock(fbdev);
return 0;
}
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index 44eb666..c2514a2 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -46,6 +46,10 @@ static char *def_vram;
static int def_vrfb;
static int def_rotate;
static int def_mirror;
+static bool auto_update;
+static unsigned int auto_update_freq;
+module_param(auto_update, bool, 0);
+module_param(auto_update_freq, uint, 0644);
#ifdef DEBUG
unsigned int omapfb_debug;
@@ -1242,6 +1246,7 @@ static int omapfb_blank(int blank, struct fb_info *fbi)
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_device *fbdev = ofbi->fbdev;
struct omap_dss_device *display = fb2display(fbi);
+ struct omapfb_display_data *d;
int r = 0;
if (!display)
@@ -1249,6 +1254,8 @@ static int omapfb_blank(int blank, struct fb_info *fbi)
omapfb_lock(fbdev);
+ d = get_display_data(fbdev, display);
+
switch (blank) {
case FB_BLANK_UNBLANK:
if (display->state != OMAP_DSS_DISPLAY_SUSPENDED)
@@ -1257,6 +1264,11 @@ static int omapfb_blank(int blank, struct fb_info *fbi)
if (display->driver->resume)
r = display->driver->resume(display);
+ if ((display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) &&
+ d->update_mode == OMAPFB_AUTO_UPDATE &&
+ !d->auto_update_work_enabled)
+ omapfb_start_auto_update(fbdev, display);
+
break;
case FB_BLANK_NORMAL:
@@ -1268,6 +1280,9 @@ static int omapfb_blank(int blank, struct fb_info *fbi)
if (display->state != OMAP_DSS_DISPLAY_ACTIVE)
goto exit;
+ if (d->auto_update_work_enabled)
+ omapfb_stop_auto_update(fbdev, display);
+
if (display->driver->suspend)
r = display->driver->suspend(display);
@@ -1724,6 +1739,78 @@ err:
return r;
}
+static void omapfb_auto_update_work(struct work_struct *work)
+{
+ struct omap_dss_device *dssdev;
+ struct omap_dss_driver *dssdrv;
+ struct omapfb_display_data *d;
+ u16 w, h;
+ unsigned int freq;
+ struct omapfb2_device *fbdev;
+
+ d = container_of(work, struct omapfb_display_data,
+ auto_update_work.work);
+
+ dssdev = d->dssdev;
+ dssdrv = dssdev->driver;
+ fbdev = d->fbdev;
+
+ if (!dssdrv || !dssdrv->update)
+ return;
+
+ if (dssdrv->sync)
+ dssdrv->sync(dssdev);
+
+ dssdrv->get_resolution(dssdev, &w, &h);
+ dssdrv->update(dssdev, 0, 0, w, h);
+
+ freq = auto_update_freq;
+ if (freq == 0)
+ freq = 20;
+ queue_delayed_work(fbdev->auto_update_wq,
+ &d->auto_update_work, HZ / freq);
+}
+
+void omapfb_start_auto_update(struct omapfb2_device *fbdev,
+ struct omap_dss_device *display)
+{
+ struct omapfb_display_data *d;
+
+ if (fbdev->auto_update_wq == NULL) {
+ struct workqueue_struct *wq;
+
+ wq = create_singlethread_workqueue("omapfb_auto_update");
+
+ if (wq == NULL) {
+ dev_err(fbdev->dev, "Failed to create workqueue for "
+ "auto-update\n");
+ return;
+ }
+
+ fbdev->auto_update_wq = wq;
+ }
+
+ d = get_display_data(fbdev, display);
+
+ INIT_DELAYED_WORK(&d->auto_update_work, omapfb_auto_update_work);
+
+ d->auto_update_work_enabled = true;
+
+ omapfb_auto_update_work(&d->auto_update_work.work);
+}
+
+void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
+ struct omap_dss_device *display)
+{
+ struct omapfb_display_data *d;
+
+ d = get_display_data(fbdev, display);
+
+ cancel_delayed_work_sync(&d->auto_update_work);
+
+ d->auto_update_work_enabled = false;
+}
+
/* initialize fb_info, var, fix to something sane based on the display */
static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi)
{
@@ -1859,12 +1946,22 @@ static void omapfb_free_resources(struct omapfb2_device *fbdev)
for (i = 0; i < fbdev->num_displays; i++) {
struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
+
+ if (fbdev->displays[i].auto_update_work_enabled)
+ omapfb_stop_auto_update(fbdev, dssdev);
+
if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
dssdev->driver->disable(dssdev);
omap_dss_put_device(dssdev);
}
+ if (fbdev->auto_update_wq != NULL) {
+ flush_workqueue(fbdev->auto_update_wq);
+ destroy_workqueue(fbdev->auto_update_wq);
+ fbdev->auto_update_wq = NULL;
+ }
+
dev_set_drvdata(fbdev->dev, NULL);
kfree(fbdev);
}
@@ -2183,6 +2280,7 @@ static int omapfb_init_display(struct omapfb2_device *fbdev,
struct omap_dss_device *dssdev)
{
struct omap_dss_driver *dssdrv = dssdev->driver;
+ struct omapfb_display_data *d;
int r;
r = dssdrv->enable(dssdev);
@@ -2192,8 +2290,20 @@ static int omapfb_init_display(struct omapfb2_device *fbdev,
return r;
}
+ d = get_display_data(fbdev, dssdev);
+
+ d->fbdev = fbdev;
+
if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
u16 w, h;
+
+ if (auto_update) {
+ omapfb_start_auto_update(fbdev, dssdev);
+ d->update_mode = OMAPFB_AUTO_UPDATE;
+ } else {
+ d->update_mode = OMAPFB_MANUAL_UPDATE;
+ }
+
if (dssdrv->enable_te) {
r = dssdrv->enable_te(dssdev, 1);
if (r) {
@@ -2202,16 +2312,6 @@ static int omapfb_init_display(struct omapfb2_device *fbdev,
}
}
- if (dssdrv->set_update_mode) {
- r = dssdrv->set_update_mode(dssdev,
- OMAP_DSS_UPDATE_MANUAL);
- if (r) {
- dev_err(fbdev->dev,
- "Failed to set update mode\n");
- return r;
- }
- }
-
dssdrv->get_resolution(dssdev, &w, &h);
r = dssdrv->update(dssdev, 0, 0, w, h);
if (r) {
@@ -2220,15 +2320,7 @@ static int omapfb_init_display(struct omapfb2_device *fbdev,
return r;
}
} else {
- if (dssdrv->set_update_mode) {
- r = dssdrv->set_update_mode(dssdev,
- OMAP_DSS_UPDATE_AUTO);
- if (r) {
- dev_err(fbdev->dev,
- "Failed to set update mode\n");
- return r;
- }
- }
+ d->update_mode = OMAPFB_AUTO_UPDATE;
}
return 0;
diff --git a/drivers/video/omap2/omapfb/omapfb-sysfs.c b/drivers/video/omap2/omapfb/omapfb-sysfs.c
index 2f5e817..153bf1a 100644
--- a/drivers/video/omap2/omapfb/omapfb-sysfs.c
+++ b/drivers/video/omap2/omapfb/omapfb-sysfs.c
@@ -518,6 +518,39 @@ static ssize_t show_virt(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%p\n", ofbi->region->vaddr);
}
+static ssize_t show_upd_mode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fbi = dev_get_drvdata(dev);
+ enum omapfb_update_mode mode;
+ int r;
+
+ r = omapfb_get_update_mode(fbi, &mode);
+
+ if (r)
+ return r;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", (unsigned)mode);
+}
+
+static ssize_t store_upd_mode(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fbi = dev_get_drvdata(dev);
+ unsigned mode;
+ int r;
+
+ r = kstrtouint(buf, 0, &mode);
+ if (r)
+ return r;
+
+ r = omapfb_set_update_mode(fbi, mode);
+ if (r)
+ return r;
+
+ return count;
+}
+
static struct device_attribute omapfb_attrs[] = {
__ATTR(rotate_type, S_IRUGO | S_IWUSR, show_rotate_type,
store_rotate_type),
@@ -528,6 +561,7 @@ static struct device_attribute omapfb_attrs[] = {
store_overlays_rotate),
__ATTR(phys_addr, S_IRUGO, show_phys, NULL),
__ATTR(virt_addr, S_IRUGO, show_virt, NULL),
+ __ATTR(update_mode, S_IRUGO | S_IWUSR, show_upd_mode, store_upd_mode),
};
int omapfb_create_sysfs(struct omapfb2_device *fbdev)
diff --git a/drivers/video/omap2/omapfb/omapfb.h b/drivers/video/omap2/omapfb/omapfb.h
index f07dbbb..fdf0ede 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)
{
--
1.7.4.1
--
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