video: sh_mobile_lcdcfb: implement display panning
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index 1cb5213..7f30cb3 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -31,6 +31,7 @@
#define _LDSR 0x46c
#define _LDCNT1R 0x470
#define _LDCNT2R 0x474
+#define _LDRCNTR 0x478
#define _LDDDSR 0x47c
#define _LDDWD0R 0x800
#define _LDDRDR 0x840
@@ -94,7 +95,11 @@
#define DISPLAY_BEU 0x00000008
#define LCDC_ENABLE 0x00000001
#define LDINTR_FE 0x00000400
+#define LDINTR_VSE 0x00000200
+#define LDINTR_VEE 0x00000100
#define LDINTR_FS 0x00000004
+#define LDINTR_VSS 0x00000002
+#define LDINTR_VES 0x00000001
struct sh_mobile_lcdc_priv;
struct sh_mobile_lcdc_chan {
@@ -110,6 +115,8 @@
struct fb_deferred_io defio;
struct scatterlist *sglist;
unsigned long frame_end;
+ unsigned long pan_offset;
+ unsigned long new_pan_offset;
wait_queue_head_t frame_end_wait;
};
@@ -266,30 +273,46 @@
struct sh_mobile_lcdc_priv *priv = data;
struct sh_mobile_lcdc_chan *ch;
unsigned long tmp;
+ unsigned long ldintr;
int is_sub;
int k;
/* acknowledge interrupt */
- tmp = lcdc_read(priv, _LDINTR);
- tmp &= 0xffffff00; /* mask in high 24 bits */
- tmp |= 0x000000ff ^ LDINTR_FS; /* status in low 8 */
+ ldintr = tmp = lcdc_read(priv, _LDINTR);
+ /*
+ * disable further VSYNC End IRQs, preserve all other enabled IRQs,
+ * write 0 to bits 0-6 to ack all triggered IRQs.
+ */
+ tmp &= 0xffffff00 & ~LDINTR_VEE;
lcdc_write(priv, _LDINTR, tmp);
/* figure out if this interrupt is for main or sub lcd */
is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
- /* wake up channel and disable clocks*/
+ /* wake up channel and disable clocks */
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
ch = &priv->ch[k];
if (!ch->enabled)
continue;
- if (is_sub == lcdc_chan_is_sublcd(ch)) {
- ch->frame_end = 1;
- wake_up(&ch->frame_end_wait);
+ /* Frame Start */
+ if (ldintr & LDINTR_FS) {
+ if (is_sub == lcdc_chan_is_sublcd(ch)) {
+ ch->frame_end = 1;
+ wake_up(&ch->frame_end_wait);
- sh_mobile_lcdc_clk_off(priv);
+ sh_mobile_lcdc_clk_off(priv);
+ }
+ }
+
+ /* VSYNC End */
+ if (ldintr & LDINTR_VES) {
+ /* Set the source address for the next refresh */
+ lcdc_write_chan(ch, LDSA1R, ch->dma_handle +
+ ch->new_pan_offset);
+ lcdc_write(ch->lcdc, _LDRCNTR, 0);
+ ch->pan_offset = ch->new_pan_offset;
}
}
@@ -649,6 +672,9 @@
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.accel = FB_ACCEL_NONE,
+ .xpanstep = 0,
+ .ypanstep = 1,
+ .ywrapstep = 0,
};
static void sh_mobile_lcdc_fillrect(struct fb_info *info,
@@ -672,13 +698,38 @@
sh_mobile_lcdc_deferred_io_touch(info);
}
+static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ struct sh_mobile_lcdc_chan *ch = info->par;
+
+ if (info->var.xoffset == var->xoffset &&
+ info->var.yoffset == var->yoffset)
+ return 0; /* No change, do nothing */
+
+ ch->new_pan_offset = (var->yoffset * info->fix.line_length) +
+ (var->xoffset * (info->var.bits_per_pixel / 8));
+
+ if (ch->new_pan_offset != ch->pan_offset) {
+ unsigned long ldintr;
+ ldintr = lcdc_read(ch->lcdc, _LDINTR);
+ ldintr |= LDINTR_VEE;
+ lcdc_write(ch->lcdc, _LDINTR, ldintr);
+ sh_mobile_lcdc_deferred_io_touch(info);
+ }
+
+ return 0;
+}
+
static struct fb_ops sh_mobile_lcdc_ops = {
+ .owner = THIS_MODULE,
.fb_setcolreg = sh_mobile_lcdc_setcolreg,
.fb_read = fb_sys_read,
.fb_write = fb_sys_write,
.fb_fillrect = sh_mobile_lcdc_fillrect,
.fb_copyarea = sh_mobile_lcdc_copyarea,
.fb_imageblit = sh_mobile_lcdc_imageblit,
+ .fb_pan_display = sh_mobile_fb_pan_display,
};
static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
@@ -846,6 +897,8 @@
goto err1;
}
init_waitqueue_head(&priv->ch[i].frame_end_wait);
+ priv->ch[j].pan_offset = 0;
+ priv->ch[j].new_pan_offset = 0;
switch (pdata->ch[i].chan) {
case LCDC_CHAN_MAINLCD:
@@ -888,7 +941,9 @@
info = priv->ch[i].info;
info->fbops = &sh_mobile_lcdc_ops;
info->var.xres = info->var.xres_virtual = cfg->lcd_cfg.xres;
- info->var.yres = info->var.yres_virtual = cfg->lcd_cfg.yres;
+ info->var.yres = cfg->lcd_cfg.yres;
+ /* Default Y virtual resolution is 2x panel size */
+ info->var.yres_virtual = info->var.yres * 2;
info->var.width = cfg->lcd_size_cfg.width;
info->var.height = cfg->lcd_size_cfg.height;
info->var.activate = FB_ACTIVATE_NOW;
@@ -898,7 +953,8 @@
info->fix = sh_mobile_lcdc_fix;
info->fix.line_length = cfg->lcd_cfg.xres * (cfg->bpp / 8);
- info->fix.smem_len = info->fix.line_length * cfg->lcd_cfg.yres;
+ info->fix.smem_len = info->fix.line_length *
+ info->var.yres_virtual;
buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
&priv->ch[i].dma_handle, GFP_KERNEL);
