diff options
| author | Dietmar Eggemann <dietmar.eggemann@arm.com> | 2012-06-21 17:16:33 +0100 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2014-07-16 09:52:11 +0800 |
| commit | fa8b1b9aa3558231c489199779fb9f6c01844036 (patch) | |
| tree | 9deb93544001c3b38e39973979013d0064633b4b /drivers/video | |
| parent | cd24e7e5281cfe7a0884a4471b3e96e49df1af25 (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>
(cherry picked from commit 5b809b267f457215e660af8cbecf0578e53f6bfe)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'drivers/video')
| -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 948d41c14130..526d771db991 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; |