Add writeback as a sysfs attribute. This can be used to show and store the dummy
writeback panel that the manager can connect to.
Add checks so that in the store functions so that a display store cant set a
writeback device and vice versa.
Signed-off-by: Archit Taneja <archit@xxxxxx>
---
drivers/video/omap2/dss/manager.c | 38 +++++++++++++++++++++++++++++++++++++
1 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index fb7c1e6..a064656 100644
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -129,6 +129,41 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
if (r)
return r;
+ if (dssdev->wbdev) {
+ r = -EINVAL;
+ return r;
+ }
+
+ r = dss_mgr_set_output(mgr, dssdev);
+ if (r)
+ return r;
+
+ return size;
+}
+
+static ssize_t manager_writeback_show(struct omap_overlay_manager *mgr, char *buf)
+{
+ struct omap_dss_device *wb_device = mgr->get_writeback(mgr);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", wb_device ?
+ wb_device->name : "<none>");
+}
+
+static ssize_t manager_writeback_store(struct omap_overlay_manager *mgr,
+ const char *buf, size_t size)
+{
+ int r;
+ struct omap_dss_device *dssdev;
+
+ r = dss_find_device_buf(&dssdev, buf, size);
+ if (r)
+ return r;
+
+ if (!dssdev->wbdev) {
+ r = -EINVAL;
+ return r;
+ }
+
r = dss_mgr_set_output(mgr, dssdev);
if (r)
return r;
@@ -452,6 +487,8 @@ struct manager_attribute {
static MANAGER_ATTR(name, S_IRUGO, manager_name_show, NULL);
static MANAGER_ATTR(display, S_IRUGO|S_IWUSR,
manager_display_show, manager_display_store);
+static MANAGER_ATTR(writeback, S_IRUGO|S_IWUSR,
+ manager_writeback_show, manager_writeback_store);
static MANAGER_ATTR(default_color, S_IRUGO|S_IWUSR,
manager_default_color_show, manager_default_color_store);
static MANAGER_ATTR(trans_key_type, S_IRUGO|S_IWUSR,
@@ -475,6 +512,7 @@ static MANAGER_ATTR(cpr_coef, S_IRUGO|S_IWUSR,
static struct attribute *manager_sysfs_attrs[] = {
&manager_attr_name.attr,
&manager_attr_display.attr,
+ &manager_attr_writeback.attr,
&manager_attr_default_color.attr,
&manager_attr_trans_key_type.attr,
&manager_attr_trans_key_value.attr,
--
1.7.4.1
--
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