-----Original Message-----
From: Inki Dae [mailto:inki.dae@samsung.com]
Sent: Monday, September 26, 2011 11:37 PM
To: FlorianSchandinat@gmx.de; <redacted>
Cc: kyungmin.park@samsung.com; lars@metafoo.de; Inki Dae
Subject: [PATCH v2 2/2] fb: add events for early fb event support.
this patch adds FB_EARLY_EVENT_BLANK and FB_R_EARLY_EVENT_BLANK
event mode supports. first, fb_notifier_call_chain() is called with
FB_EARLY_EVENT_BLANK and fb_blank() of specific fb driver is called
and then fb_notifier_call_chain() is called with FB_EVENT_BLANK again
at fb_blank(). and if fb_blank() was failed then fb_nitifier_call_chain()
would be called with FB_R_EARLY_EVENT_BLANK to revert the previous
effects.
quoted hunk ↗ jump to hunk
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
drivers/video/fbmem.c | 21 +++++++++++++++------
include/linux/fb.h | 4 ++++
2 files changed, 19 insertions(+), 6 deletions(-)
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index ad93629..a2bd17b 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1032,20 +1032,29 @@ fb_set_var(struct fb_info *info, struct
fb_var_screeninfo *var)
int
fb_blank(struct fb_info *info, int blank)
{
- int ret = -EINVAL;
+ struct fb_event event;
+ int ret = -EINVAL, early_ret;
if (blank > FB_BLANK_POWERDOWN)
blank = FB_BLANK_POWERDOWN;
+ event.info = info;
+ event.data = ␣
+
+ early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
+
if (info->fbops->fb_blank)
ret = info->fbops->fb_blank(blank, info);
- if (!ret) {
- struct fb_event event;
-
- event.info = info;
- event.data = ␣
+ if (!ret)
fb_notifier_call_chain(FB_EVENT_BLANK, &event);
+ else {
+ /*
+ * if fb_blank is failed then revert effects of
+ * the early blank event.
+ */
+ if (early_ret < 0)
Ah, this is condition wrong so I will fix it to "if (!early_ret)".
+ fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK,
&event);
quoted hunk ↗ jump to hunk
}
return ret;
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 1d6836c..29f53d5 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -549,6 +549,10 @@ struct fb_cursor_user {
#define FB_EVENT_FB_UNBIND 0x0E
/* CONSOLE-SPECIFIC: remap all consoles to new fb - for vgaswitcheroo */
#define FB_EVENT_REMAP_ALL_CONSOLE 0x0F
+/* A hardware display blank early change occured */
+#define FB_EARLY_EVENT_BLANK 0x10
+/* A hardware display blank revert early change occured */
+#define FB_R_EARLY_EVENT_BLANK 0x11
struct fb_event {
struct fb_info *info;
--
1.7.4.1