summaryrefslogtreecommitdiff
path: root/drivers/video/mx3fb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/mx3fb.c')
-rw-r--r--drivers/video/mx3fb.c55
1 files changed, 47 insertions, 8 deletions
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
index eec0d7b748eb..c89f8a8d36d2 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 *);
@@ -698,9 +698,29 @@ static void mx3fb_dma_done(void *arg)
complete(&mx3_fbi->flip_cmpl);
}
+static bool mx3fb_must_set_par(struct fb_info *fbi)
+{
+ struct mx3fb_info *mx3_fbi = fbi->par;
+ struct fb_var_screeninfo old_var = mx3_fbi->cur_var;
+ struct fb_var_screeninfo new_var = fbi->var;
+
+ if ((fbi->var.activate & FB_ACTIVATE_FORCE) &&
+ (fbi->var.activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW)
+ return true;
+
+ /*
+ * Ignore xoffset and yoffset update,
+ * because pan display handles this case.
+ */
+ old_var.xoffset = new_var.xoffset;
+ old_var.yoffset = new_var.yoffset;
+
+ return !!memcmp(&old_var, &new_var, sizeof(struct fb_var_screeninfo));
+}
+
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 +800,25 @@ 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;
}
@@ -802,7 +839,7 @@ static int mx3fb_set_par(struct fb_info *fbi)
mutex_lock(&mx3_fbi->mutex);
- ret = __set_par(fbi, true);
+ ret = mx3fb_must_set_par(fbi) ? __set_par(fbi, true) : 0;
mutex_unlock(&mx3_fbi->mutex);
@@ -901,8 +938,8 @@ 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 +1080,8 @@ 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 +1164,8 @@ 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");