70 lines
2.2 KiB
Diff
70 lines
2.2 KiB
Diff
From: Ondrej Jirman <megous@megous.com>
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Date: Sun, 17 Oct 2021 12:46:01 +0200
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Subject: [PATCH 10/36] video: fbdev: Add events for early fb event support
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This patch adds FB_EARLY_EVENT_BLANK and FB_R_EARLY_EVENT_BLANK
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event mode supports. first, fb_notifier_call_chain() is called with
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FB_EARLY_EVENT_BLANK and fb_blank() of specific fb driver is called
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and then fb_notifier_call_chain() is called with FB_EVENT_BLANK again
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at fb_blank(). and if fb_blank() was failed then fb_nitifier_call_chain()
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would be called with FB_R_EARLY_EVENT_BLANK to revert the previous effects.
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Signed-off-by: Inki Dae <inki.dae@samsung.com>
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Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
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---
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drivers/video/fbdev/core/fbmem.c | 12 +++++++++++-
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include/linux/fb.h | 5 +++++
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2 files changed, 16 insertions(+), 1 deletion(-)
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diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
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index 0fa7ede..71d9d4a 100644
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--- a/drivers/video/fbdev/core/fbmem.c
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+++ b/drivers/video/fbdev/core/fbmem.c
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@@ -1067,7 +1067,7 @@ int
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fb_blank(struct fb_info *info, int blank)
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{
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struct fb_event event;
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- int ret = -EINVAL;
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+ int ret = -EINVAL, early_ret;
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if (blank > FB_BLANK_POWERDOWN)
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blank = FB_BLANK_POWERDOWN;
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@@ -1075,11 +1075,21 @@ fb_blank(struct fb_info *info, int blank)
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event.info = info;
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event.data = ␣
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+ early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
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+
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if (info->fbops->fb_blank)
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ret = info->fbops->fb_blank(blank, info);
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if (!ret)
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fb_notifier_call_chain(FB_EVENT_BLANK, &event);
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+ else {
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+ /*
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+ * if fb_blank is failed then revert effects of
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+ * the early blank event.
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+ */
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+ if (!early_ret)
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+ fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
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+ }
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return ret;
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}
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diff --git a/include/linux/fb.h b/include/linux/fb.h
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index 3da9584..5ac24d0 100644
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--- a/include/linux/fb.h
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+++ b/include/linux/fb.h
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@@ -137,6 +137,11 @@ struct fb_cursor_user {
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/* A display blank is requested */
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#define FB_EVENT_BLANK 0x09
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+/* A hardware display blank early change occured */
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+#define FB_EARLY_EVENT_BLANK 0x10
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+/* A hardware display blank revert early change occured */
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+#define FB_R_EARLY_EVENT_BLANK 0x11
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+
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struct fb_event {
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struct fb_info *info;
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void *data;
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