rk3368 lcdc: add CABC mode config

Signed-off-by: hjc <hjc@rock-chips.com>

drivers/video/of_display_timing.c

@@ -123,6 +123,15 @@ static struct display_timing *of_get_display_timing(struct device_node *np)
 	       		ret = of_property_read_u32_array(np,
 	       			"dsp-lut",dt->dsp_lut, length >> 2);
 	}
+	prop = of_find_property(np, "cabc-lut", &length);
+	if (prop) {
+		dt->cabc_lut = kzalloc(length, GFP_KERNEL);
+		if (dt->cabc_lut)
+			ret = of_property_read_u32_array(np,
+							 "cabc-lut",
+							 dt->cabc_lut,
+							 length >> 2);
+	}
 #endif
 
 	if (ret) {

drivers/video/rockchip/rk_fb.c

@@ -451,6 +451,7 @@ int rk_fb_video_mode_from_timing(const struct display_timing *dt,
 	screen->face = dt->face;
 	screen->color_mode = dt->color_mode;
 	screen->dsp_lut = dt->dsp_lut;
+	screen->cabc_lut = dt->cabc_lut;
 
 	if (dt->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
 		screen->pin_dclk = 1;

drivers/video/rockchip/rkfb_sysfs.c

@@ -492,6 +492,50 @@ static ssize_t set_hwc_lut(struct device *dev, struct device_attribute *attr,
 	return count;
 }
 
+static ssize_t show_cabc_lut(struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	return 0;
+}
+
+static ssize_t set_cabc_lut(struct device *dev, struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	int cabc_lut[256];
+	const char *start = buf;
+	int i = 256, temp;
+	int space_max = 10;
+
+	struct fb_info *fbi = dev_get_drvdata(dev);
+	struct rk_fb_par *fb_par = (struct rk_fb_par *)fbi->par;
+	struct rk_lcdc_driver *dev_drv = fb_par->lcdc_drv;
+
+	for (i = 0; i < 256; i++) {
+		temp = i;
+		/*init by default value*/
+		cabc_lut[i] = temp + (temp << 8) + (temp << 16);
+	}
+	for (i = 0; i < 256; i++) {
+		space_max = 10;	/*max space number 10*/
+		temp = simple_strtoul(start, NULL, 10);
+		cabc_lut[i] = temp;
+		do {
+			start++;
+			space_max--;
+		} while ((*start != ' ') && space_max);
+
+		if (!space_max)
+			break;
+		else
+			start++;
+	}
+	if (dev_drv->ops->set_cabc_lut)
+		dev_drv->ops->set_cabc_lut(dev_drv, cabc_lut);
+
+	return count;
+}
+
+
 static ssize_t show_dsp_lut(struct device *dev,
 			    struct device_attribute *attr, char *buf)
 {
@@ -772,6 +816,7 @@ static struct device_attribute rkfb_attrs[] = {
 	__ATTR(fps, S_IRUGO | S_IWUSR, show_fps, set_fps),
 	__ATTR(map, S_IRUGO | S_IWUSR, show_fb_win_map, set_fb_win_map),
 	__ATTR(dsp_lut, S_IRUGO | S_IWUSR, show_dsp_lut, set_dsp_lut),
+	__ATTR(cabc_lut, S_IRUGO | S_IWUSR, show_cabc_lut, set_cabc_lut),
 	__ATTR(hwc_lut, S_IRUGO | S_IWUSR, show_hwc_lut, set_hwc_lut),
 	__ATTR(cabc, S_IRUGO | S_IWUSR, show_dsp_cabc, set_dsp_cabc),
 	__ATTR(bcsh, S_IRUGO | S_IWUSR, show_dsp_bcsh, set_dsp_bcsh),

include/linux/rk_fb.h

@@ -449,6 +449,7 @@ struct rk_lcdc_drv_ops {
 	int (*fb_win_remap) (struct rk_lcdc_driver *dev_drv,
 			     u16 fb_win_map_order);
 	int (*set_dsp_lut) (struct rk_lcdc_driver *dev_drv, int *lut);
+	int (*set_cabc_lut)(struct rk_lcdc_driver *dev_drv, int *lut);
 	int (*set_hwc_lut) (struct rk_lcdc_driver *dev_drv, int *hwc_lut, int mode);
 	int (*read_dsp_lut) (struct rk_lcdc_driver *dev_drv, int *lut);
 	int (*lcdc_hdmi_process) (struct rk_lcdc_driver *dev_drv, int mode);	/*some lcdc need to some process in hdmi mode*/

include/linux/rk_screen.h

@@ -79,7 +79,8 @@ struct rk_screen {
 	u16 width;
 	u16 height;
 	u8  ft;
-	int *dsp_lut; 
+	int *dsp_lut;
+	int *cabc_lut;
 
 #if defined(CONFIG_MFD_RK616) || defined(CONFIG_LCDC_RK312X)
 	u32 pll_cfg_val;  //bellow are for jettaB

include/video/display_timing.h

@@ -81,6 +81,7 @@ struct display_timing {
 	u16 face;				/*display output  interface format:24bit 18bit 16bit*/
 	u16 color_mode;				/* input color mode: RGB or YUV */
 	u32 *dsp_lut;
+	u32 *cabc_lut;
 #endif
 };