diff options
| author | Dietmar Eggemann <dietmar.eggemann@arm.com> | 2012-06-21 17:16:33 +0100 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2012-07-16 14:21:44 +0100 |
| commit | 98afb9be3b8f6169b346c57fd91e9020f3998df1 (patch) | |
| tree | 7480439a980743776656c2503745061828b8960f | |
| parent | 2fb1e19c55c90a333eba750003b574f93e9960fa (diff) | |
ARM HDLCD: Get it working under Android.
Add a shortcut when set_par is called to only change the yoffset. Android is
doing that instead of calling pan_display to flip the framebuffer.
Signed-off-by: Chris Redpath <chris.redpath@arm.com>
| -rw-r--r-- | drivers/video/arm-hdlcd.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/video/arm-hdlcd.c b/drivers/video/arm-hdlcd.c index 802a4476177..3e52ee013ad 100644 --- a/drivers/video/arm-hdlcd.c +++ b/drivers/video/arm-hdlcd.c @@ -166,6 +166,11 @@ static int hdlcd_set_output_mode(int xres, int yres) return set_dvi_mode(msgbuffer[0]); } + +/* prototype */ +static int hdlcd_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info); + #define WRITE_HDLCD_REG(reg, value) writel((value), hdlcd->base + (reg)) #define READ_HDLCD_REG(reg) readl(hdlcd->base + (reg)) @@ -174,9 +179,22 @@ static int hdlcd_set_par(struct fb_info *info) struct hdlcd_device *hdlcd = to_hdlcd_device(info); int bytes_per_pixel = hdlcd->fb.var.bits_per_pixel / 8; int polarities; - - if (!memcmp(&info->var, &cached_var_screeninfo, sizeof(struct fb_var_screeninfo))) + int old_yoffset; + + /* check for shortcuts */ + old_yoffset = cached_var_screeninfo.yoffset; + cached_var_screeninfo.yoffset = info->var.yoffset; + if (!memcmp(&info->var, &cached_var_screeninfo, + sizeof(struct fb_var_screeninfo))) { + if(old_yoffset != info->var.yoffset) { + /* we only changed yoffset */ + hdlcd_pan_display(&info->var, info); + memcpy(&cached_var_screeninfo, &info->var, + sizeof(struct fb_var_screeninfo)); + } + /* or no change */ return 0; + } hdlcd->fb.fix.line_length = hdlcd->fb.var.xres * bytes_per_pixel; |