fbdev: sh_mobile_lcdc: Split channel initialization from probe function

Move channel initialization to sh_mobile_lcdc_channel_init() and call
the function from sh_mobile_lcdc_probe(). This makes the code more
readable and prepares it for fix/var initialization rework.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

drivers/video/sh_mobile_lcdcfb.c

@@ -1485,15 +1485,129 @@ static int sh_mobile_lcdc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
+static int __devinit sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch,
+						 struct device *dev)
 {
+	struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
+	const struct fb_videomode *max_mode;
+	const struct fb_videomode *mode;
+	struct fb_var_screeninfo *var;
 	struct fb_info *info;
-	struct sh_mobile_lcdc_priv *priv;
+	unsigned int max_size;
+	int num_cfg;
+	void *buf;
+	int ret;
+	int i;
+
+	ch->info = framebuffer_alloc(0, dev);
+	if (!ch->info) {
+		dev_err(dev, "unable to allocate fb_info\n");
+		return -ENOMEM;
+	}
+
+	info = ch->info;
+	var = &info->var;
+	info->fbops = &sh_mobile_lcdc_ops;
+	info->par = ch;
+
+	mutex_init(&ch->open_lock);
+
+	/* Iterate through the modes to validate them and find the highest
+	 * resolution.
+	 */
+	max_mode = NULL;
+	max_size = 0;
+
+	for (i = 0, mode = cfg->lcd_cfg; i < cfg->num_cfg; i++, mode++) {
+		unsigned int size = mode->yres * mode->xres;
+
+		/* NV12 buffers must have even number of lines */
+		if ((cfg->nonstd) && cfg->bpp == 12 &&
+				(mode->yres & 0x1)) {
+			dev_err(dev, "yres must be multiple of 2 for YCbCr420 "
+				"mode.\n");
+			return -EINVAL;
+		}
+
+		if (size > max_size) {
+			max_mode = mode;
+			max_size = size;
+		}
+	}
+
+	if (!max_size)
+		max_size = MAX_XRES * MAX_YRES;
+	else
+		dev_dbg(dev, "Found largest videomode %ux%u\n",
+			max_mode->xres, max_mode->yres);
+
+	info->fix = sh_mobile_lcdc_fix;
+	info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
+
+	 /* Only pan in 2 line steps for NV12 */
+	if (cfg->nonstd && cfg->bpp == 12)
+		info->fix.ypanstep = 2;
+
+	if (cfg->lcd_cfg == NULL) {
+		mode = &default_720p;
+		num_cfg = 1;
+	} else {
+		mode = cfg->lcd_cfg;
+		num_cfg = cfg->num_cfg;
+	}
+
+	fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
+
+	fb_videomode_to_var(var, mode);
+	var->width = cfg->lcd_size_cfg.width;
+	var->height = cfg->lcd_size_cfg.height;
+	/* Default Y virtual resolution is 2x panel size */
+	var->yres_virtual = var->yres * 2;
+	var->activate = FB_ACTIVATE_NOW;
+
+	ret = sh_mobile_lcdc_set_bpp(var, cfg->bpp, cfg->nonstd);
+	if (ret)
+		return ret;
+
+	buf = dma_alloc_coherent(dev, info->fix.smem_len, &ch->dma_handle,
+				 GFP_KERNEL);
+	if (!buf) {
+		dev_err(dev, "unable to allocate buffer\n");
+		return -ENOMEM;
+	}
+
+	info->pseudo_palette = &ch->pseudo_palette;
+	info->flags = FBINFO_FLAG_DEFAULT;
+
+	ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
+	if (ret < 0) {
+		dev_err(dev, "unable to allocate cmap\n");
+		dma_free_coherent(dev, info->fix.smem_len,
+				  buf, ch->dma_handle);
+		return ret;
+	}
+
+	info->fix.smem_start = ch->dma_handle;
+	if (var->nonstd)
+		info->fix.line_length = var->xres;
+	else
+		info->fix.line_length = var->xres * (cfg->bpp / 8);
+
+	info->screen_base = buf;
+	info->device = dev;
+	ch->display_var = *var;
+
+	return 0;
+}
+
+static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
+{
 	struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
+	struct sh_mobile_lcdc_priv *priv;
 	struct resource *res;
+	int num_channels;
 	int error;
-	void *buf;
-	int i, j;
+	int i;
 
 	if (!pdata) {
 		dev_err(&pdev->dev, "no platform data defined\n");
@@ -1525,9 +1639,8 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
 	priv->irq = i;
 	atomic_set(&priv->hw_usecnt, -1);
 
-	j = 0;
-	for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
-		struct sh_mobile_lcdc_chan *ch = priv->ch + j;
+	for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
+		struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
 
 		ch->lcdc = priv;
 		memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
@@ -1549,24 +1662,24 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
 		case LCDC_CHAN_MAINLCD:
 			ch->enabled = LDCNT2R_ME;
 			ch->reg_offs = lcdc_offs_mainlcd;
-			j++;
+			num_channels++;
 			break;
 		case LCDC_CHAN_SUBLCD:
 			ch->enabled = LDCNT2R_SE;
 			ch->reg_offs = lcdc_offs_sublcd;
-			j++;
+			num_channels++;
 			break;
 		}
 	}
 
-	if (!j) {
+	if (!num_channels) {
 		dev_err(&pdev->dev, "no channels defined\n");
 		error = -EINVAL;
 		goto err1;
 	}
 
 	/* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
-	if (j == 2)
+	if (num_channels == 2)
 		priv->forced_bpp = pdata->ch[0].bpp;
 
 	priv->base = ioremap_nocache(res->start, resource_size(res));
@@ -1581,114 +1694,13 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
 
 	priv->meram_dev = pdata->meram_dev;
 
-	for (i = 0; i < j; i++) {
-		struct fb_var_screeninfo *var;
-		const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
+	for (i = 0; i < num_channels; i++) {
 		struct sh_mobile_lcdc_chan *ch = priv->ch + i;
-		struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
-		const struct fb_videomode *mode = cfg->lcd_cfg;
-		unsigned long max_size = 0;
-		int k;
-		int num_cfg;
-
-		ch->info = framebuffer_alloc(0, &pdev->dev);
-		if (!ch->info) {
-			dev_err(&pdev->dev, "unable to allocate fb_info\n");
-			error = -ENOMEM;
-			break;
-		}
-
-		info = ch->info;
-		var = &info->var;
-		info->fbops = &sh_mobile_lcdc_ops;
-		info->par = ch;
-
-		mutex_init(&ch->open_lock);
-
-		for (k = 0, lcd_cfg = mode;
-		     k < cfg->num_cfg && lcd_cfg;
-		     k++, lcd_cfg++) {
-			unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
-			/* NV12 buffers must have even number of lines */
-			if ((cfg->nonstd) && cfg->bpp == 12 &&
-					(lcd_cfg->yres & 0x1)) {
-				dev_err(&pdev->dev, "yres must be multiple of 2"
-						" for YCbCr420 mode.\n");
-				error = -EINVAL;
-				goto err1;
-			}
-
-			if (size > max_size) {
-				max_cfg = lcd_cfg;
-				max_size = size;
-			}
-		}
-
-		if (!mode)
-			max_size = MAX_XRES * MAX_YRES;
-		else if (max_cfg)
-			dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
-				max_cfg->xres, max_cfg->yres);
-
-		info->fix = sh_mobile_lcdc_fix;
-		info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
-
-		 /* Only pan in 2 line steps for NV12 */
-		if (cfg->nonstd && cfg->bpp == 12)
-			info->fix.ypanstep = 2;
-
-		if (!mode) {
-			mode = &default_720p;
-			num_cfg = 1;
-		} else {
-			num_cfg = cfg->num_cfg;
-		}
-
-		fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
-
-		fb_videomode_to_var(var, mode);
-		var->width = cfg->lcd_size_cfg.width;
-		var->height = cfg->lcd_size_cfg.height;
-		/* Default Y virtual resolution is 2x panel size */
-		var->yres_virtual = var->yres * 2;
-		var->activate = FB_ACTIVATE_NOW;
-
-		error = sh_mobile_lcdc_set_bpp(var, cfg->bpp, cfg->nonstd);
-		if (error)
-			break;
-
-		buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
-					 &ch->dma_handle, GFP_KERNEL);
-		if (!buf) {
-			dev_err(&pdev->dev, "unable to allocate buffer\n");
-			error = -ENOMEM;
-			break;
-		}
-
-		info->pseudo_palette = &ch->pseudo_palette;
-		info->flags = FBINFO_FLAG_DEFAULT;
-
-		error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
-		if (error < 0) {
-			dev_err(&pdev->dev, "unable to allocate cmap\n");
-			dma_free_coherent(&pdev->dev, info->fix.smem_len,
-					  buf, ch->dma_handle);
-			break;
-		}
-
-		info->fix.smem_start = ch->dma_handle;
-		if (var->nonstd)
-			info->fix.line_length = var->xres;
-		else
-			info->fix.line_length = var->xres * (cfg->bpp / 8);
-
-		info->screen_base = buf;
-		info->device = &pdev->dev;
-		ch->display_var = *var;
-	}
 
+		error = sh_mobile_lcdc_channel_init(ch, &pdev->dev);
 		if (error)
 			goto err1;
+	}
 
 	error = sh_mobile_lcdc_start(priv);
 	if (error) {
@@ -1696,10 +1708,9 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
 		goto err1;
 	}
 
-	for (i = 0; i < j; i++) {
+	for (i = 0; i < num_channels; i++) {
 		struct sh_mobile_lcdc_chan *ch = priv->ch + i;
-
-		info = ch->info;
+		struct fb_info *info = ch->info;
 
 		if (info->fbdefio) {
 			ch->sglist = vmalloc(sizeof(struct scatterlist) *