diff options
| author | Liu Ying <Ying.Liu@freescale.com> | 2012-06-11 05:06:49 +0400 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2012-06-27 10:59:51 +0400 |
| commit | 6cd77e00c00c5da3b6f8546dcb6dfac9611ca10b (patch) | |
| tree | 3ac8a9dd289153b04be7478ea27f5c149482e614 /drivers/video/mx3fb.c | |
| parent | 0f90fa539dff47e65fe859de2a9089e53231e0da (diff) | |
| download | linux-6cd77e00c00c5da3b6f8546dcb6dfac9611ca10b.tar.xz | |
mx3fb: support pan display with fb_set_var
Users may call FBIOPUT_VSCREENINFO ioctrl to do pan display.
This ioctrl relies on fb_set_var() to do the job. fb_set_var()
calls the custom fb_set_par() method and then calls the custom
fb_pan_display() method. Before calling the custom fb_pan_display()
method, info->var is already updated from the new *var in fb_set_var().
And, the custom fb_pan_display() method checks if xoffset and yoffset
in info->var and the new *var are different before doing actual panning,
which prevents the panning from happening within fb_set_var() context.
This patch caches the current var info locally in mx3fb driver so that
pan display with fb_set_var is supported.
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/mx3fb.c')
| -rw-r--r-- | drivers/video/mx3fb.c | 33 |
1 files changed, 26 insertions, 7 deletions
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c index eec0d7b748eb..da1d052a18a5 100644 --- a/drivers/video/mx3fb.c +++ b/drivers/video/mx3fb.c @@ -269,7 +269,7 @@ struct mx3fb_info { dma_cookie_t cookie; struct scatterlist sg[2]; - u32 sync; /* preserve var->sync flags */ + struct fb_var_screeninfo cur_var; /* current var info */ }; static void mx3fb_dma_done(void *); @@ -700,7 +700,7 @@ static void mx3fb_dma_done(void *arg) static int __set_par(struct fb_info *fbi, bool lock) { - u32 mem_len; + u32 mem_len, cur_xoffset, cur_yoffset; struct ipu_di_signal_cfg sig_cfg; enum ipu_panel mode = IPU_PANEL_TFT; struct mx3fb_info *mx3_fbi = fbi->par; @@ -780,8 +780,25 @@ static int __set_par(struct fb_info *fbi, bool lock) video->out_height = fbi->var.yres; video->out_stride = fbi->var.xres_virtual; - if (mx3_fbi->blank == FB_BLANK_UNBLANK) + if (mx3_fbi->blank == FB_BLANK_UNBLANK) { sdc_enable_channel(mx3_fbi); + /* + * sg[0] points to fb smem_start address + * and is actually active in controller. + */ + mx3_fbi->cur_var.xoffset = 0; + mx3_fbi->cur_var.yoffset = 0; + } + + /* + * Preserve xoffset and yoffest in case they are + * inactive in controller as fb is blanked. + */ + cur_xoffset = mx3_fbi->cur_var.xoffset; + cur_yoffset = mx3_fbi->cur_var.yoffset; + mx3_fbi->cur_var = fbi->var; + mx3_fbi->cur_var.xoffset = cur_xoffset; + mx3_fbi->cur_var.yoffset = cur_yoffset; return 0; } @@ -901,8 +918,8 @@ static int mx3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi) var->grayscale = 0; /* Preserve sync flags */ - var->sync |= mx3_fbi->sync; - mx3_fbi->sync |= var->sync; + var->sync |= mx3_fbi->cur_var.sync; + mx3_fbi->cur_var.sync |= var->sync; return 0; } @@ -1043,8 +1060,8 @@ static int mx3fb_pan_display(struct fb_var_screeninfo *var, return -EINVAL; } - if (fbi->var.xoffset == var->xoffset && - fbi->var.yoffset == var->yoffset) + if (mx3_fbi->cur_var.xoffset == var->xoffset && + mx3_fbi->cur_var.yoffset == var->yoffset) return 0; /* No change, do nothing */ y_bottom = var->yoffset; @@ -1127,6 +1144,8 @@ static int mx3fb_pan_display(struct fb_var_screeninfo *var, else fbi->var.vmode &= ~FB_VMODE_YWRAP; + mx3_fbi->cur_var = fbi->var; + mutex_unlock(&mx3_fbi->mutex); dev_dbg(fbi->device, "Update complete\n"); |