drivers/video/fbdev/mmp/hw/mmp_ctrl.c - arm/linux-arm64-legacy - Git at Google

 /*
  * linux/drivers/video/mmp/hw/mmp_ctrl.c
  * Marvell MMP series Display Controller support
  *
  * Copyright (C) 2012 Marvell Technology Group Ltd.
  * Authors:  Guoqing Li <ligq@marvell.com>
  *          Lisa Du <cldu@marvell.com>
  *          Zhou Zhu <zzhu3@marvell.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * Free Software Foundation; either version 2 of the License, or (at your
  * option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/vmalloc.h>
 #include <linux/uaccess.h>
 #include <linux/kthread.h>
 #include <linux/io.h>

 #include "mmp_ctrl.h"

 static irqreturn_t ctrl_handle_irq(int irq, void *dev_id)
 {
 	struct mmphw_ctrl *ctrl = (struct mmphw_ctrl *)dev_id;
 	u32 isr, imask, tmp;

 	isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
 	imask = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);

 	do {
 		/* clear clock only */
 		tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
 		if (tmp & isr)
 			writel_relaxed(~isr, ctrl->reg_base + SPU_IRQ_ISR);
 	} while ((isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR)) & imask);

 	return IRQ_HANDLED;
 }

 static u32 fmt_to_reg(struct mmp_overlay *overlay, int pix_fmt)
 {
 	u32 rbswap = 0, uvswap = 0, yuvswap = 0,
 		csc_en = 0, val = 0,
 		vid = overlay_is_vid(overlay);

 	switch (pix_fmt) {
 	case PIXFMT_RGB565:
 	case PIXFMT_RGB1555:
 	case PIXFMT_RGB888PACK:
 	case PIXFMT_RGB888UNPACK:
 	case PIXFMT_RGBA888:
 		rbswap = 1;
 		break;
 	case PIXFMT_VYUY:
 	case PIXFMT_YVU422P:
 	case PIXFMT_YVU420P:
 		uvswap = 1;
 		break;
 	case PIXFMT_YUYV:
 		yuvswap = 1;
 		break;
 	default:
 		break;
 	}

 	switch (pix_fmt) {
 	case PIXFMT_RGB565:
 	case PIXFMT_BGR565:
 		break;
 	case PIXFMT_RGB1555:
 	case PIXFMT_BGR1555:
 		val = 0x1;
 		break;
 	case PIXFMT_RGB888PACK:
 	case PIXFMT_BGR888PACK:
 		val = 0x2;
 		break;
 	case PIXFMT_RGB888UNPACK:
 	case PIXFMT_BGR888UNPACK:
 		val = 0x3;
 		break;
 	case PIXFMT_RGBA888:
 	case PIXFMT_BGRA888:
 		val = 0x4;
 		break;
 	case PIXFMT_UYVY:
 	case PIXFMT_VYUY:
 	case PIXFMT_YUYV:
 		val = 0x5;
 		csc_en = 1;
 		break;
 	case PIXFMT_YUV422P:
 	case PIXFMT_YVU422P:
 		val = 0x6;
 		csc_en = 1;
 		break;
 	case PIXFMT_YUV420P:
 	case PIXFMT_YVU420P:
 		val = 0x7;
 		csc_en = 1;
 		break;
 	default:
 		break;
 	}

 	return (dma_palette(0) | dma_fmt(vid, val) |
 		dma_swaprb(vid, rbswap) | dma_swapuv(vid, uvswap) |
 		dma_swapyuv(vid, yuvswap) | dma_csc(vid, csc_en));
 }

 static void dmafetch_set_fmt(struct mmp_overlay *overlay)
 {
 	u32 tmp;
 	struct mmp_path *path = overlay->path;
 	tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 	tmp &= ~dma_mask(overlay_is_vid(overlay));
 	tmp |= fmt_to_reg(overlay, overlay->win.pix_fmt);
 	writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 }

 static void overlay_set_win(struct mmp_overlay *overlay, struct mmp_win *win)
 {
 	struct lcd_regs *regs = path_regs(overlay->path);

 	/* assert win supported */
 	memcpy(&overlay->win, win, sizeof(struct mmp_win));

 	mutex_lock(&overlay->access_ok);

 	if (overlay_is_vid(overlay)) {
 		writel_relaxed(win->pitch[0], &regs->v_pitch_yc);
 		writel_relaxed(win->pitch[2] << 16 |
 				win->pitch[1], &regs->v_pitch_uv);

 		writel_relaxed((win->ysrc << 16) | win->xsrc, &regs->v_size);
 		writel_relaxed((win->ydst << 16) | win->xdst, &regs->v_size_z);
 		writel_relaxed(win->ypos << 16 | win->xpos, &regs->v_start);
 	} else {
 		writel_relaxed(win->pitch[0], &regs->g_pitch);

 		writel_relaxed((win->ysrc << 16) | win->xsrc, &regs->g_size);
 		writel_relaxed((win->ydst << 16) | win->xdst, &regs->g_size_z);
 		writel_relaxed(win->ypos << 16 | win->xpos, &regs->g_start);
 	}

 	dmafetch_set_fmt(overlay);
 	mutex_unlock(&overlay->access_ok);
 }

 static void dmafetch_onoff(struct mmp_overlay *overlay, int on)
 {
 	u32 mask = overlay_is_vid(overlay) ? CFG_DMA_ENA_MASK :
 		   CFG_GRA_ENA_MASK;
 	u32 enable = overlay_is_vid(overlay) ? CFG_DMA_ENA(1) : CFG_GRA_ENA(1);
 	u32 tmp;
 	struct mmp_path *path = overlay->path;

 	mutex_lock(&overlay->access_ok);
 	tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 	tmp &= ~mask;
 	tmp |= (on ? enable : 0);
 	writel(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 	mutex_unlock(&overlay->access_ok);
 }

 static void path_enabledisable(struct mmp_path *path, int on)
 {
 	u32 tmp;
 	mutex_lock(&path->access_ok);
 	tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 	if (on)
 		tmp &= ~SCLK_DISABLE;
 	else
 		tmp |= SCLK_DISABLE;
 	writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
 	mutex_unlock(&path->access_ok);
 }

 static void path_onoff(struct mmp_path *path, int on)
 {
 	if (path->status == on) {
 		dev_info(path->dev, "path %s is already %s\n",
 				path->name, stat_name(path->status));
 		return;
 	}

 	if (on) {
 		path_enabledisable(path, 1);

 		if (path->panel && path->panel->set_onoff)
 			path->panel->set_onoff(path->panel, 1);
 	} else {
 		if (path->panel && path->panel->set_onoff)
 			path->panel->set_onoff(path->panel, 0);

 		path_enabledisable(path, 0);
 	}
 	path->status = on;
 }

 static void overlay_set_onoff(struct mmp_overlay *overlay, int on)
 {
 	if (overlay->status == on) {
 		dev_info(overlay_to_ctrl(overlay)->dev, "overlay %s is already %s\n",
 			overlay->path->name, stat_name(overlay->status));
 		return;
 	}
 	overlay->status = on;
 	dmafetch_onoff(overlay, on);
 	if (overlay->path->ops.check_status(overlay->path)
 			!= overlay->path->status)
 		path_onoff(overlay->path, on);
 }

 static void overlay_set_fetch(struct mmp_overlay *overlay, int fetch_id)
 {
 	overlay->dmafetch_id = fetch_id;
 }

 static int overlay_set_addr(struct mmp_overlay *overlay, struct mmp_addr *addr)
 {
 	struct lcd_regs *regs = path_regs(overlay->path);

 	/* FIXME: assert addr supported */
 	memcpy(&overlay->addr, addr, sizeof(struct mmp_addr));

 	if (overlay_is_vid(overlay)) {
 		writel_relaxed(addr->phys[0], &regs->v_y0);
 		writel_relaxed(addr->phys[1], &regs->v_u0);
 		writel_relaxed(addr->phys[2], &regs->v_v0);
 	} else
 		writel_relaxed(addr->phys[0], &regs->g_0);

 	return overlay->addr.phys[0];
 }

 static void path_set_mode(struct mmp_path *path, struct mmp_mode *mode)
 {
 	struct lcd_regs *regs = path_regs(path);
 	u32 total_x, total_y, vsync_ctrl, tmp, sclk_src, sclk_div,
 		link_config = path_to_path_plat(path)->link_config,
 		dsi_rbswap = path_to_path_plat(path)->link_config;

 	/* FIXME: assert videomode supported */
 	memcpy(&path->mode, mode, sizeof(struct mmp_mode));

 	mutex_lock(&path->access_ok);

 	/* polarity of timing signals */
 	tmp = readl_relaxed(ctrl_regs(path) + intf_ctrl(path->id)) & 0x1;
 	tmp |= mode->vsync_invert ? 0 : 0x8;
 	tmp |= mode->hsync_invert ? 0 : 0x4;
 	tmp |= link_config & CFG_DUMBMODE_MASK;
 	tmp |= CFG_DUMB_ENA(1);
 	writel_relaxed(tmp, ctrl_regs(path) + intf_ctrl(path->id));

 	/* interface rb_swap setting */
 	tmp = readl_relaxed(ctrl_regs(path) + intf_rbswap_ctrl(path->id)) &
 		(~(CFG_INTFRBSWAP_MASK));
 	tmp |= dsi_rbswap & CFG_INTFRBSWAP_MASK;
 	writel_relaxed(tmp, ctrl_regs(path) + intf_rbswap_ctrl(path->id));

 	writel_relaxed((mode->yres << 16) | mode->xres, &regs->screen_active);
 	writel_relaxed((mode->left_margin << 16) | mode->right_margin,
 		&regs->screen_h_porch);
 	writel_relaxed((mode->upper_margin << 16) | mode->lower_margin,
 		&regs->screen_v_porch);
 	total_x = mode->xres + mode->left_margin + mode->right_margin +
 		mode->hsync_len;
 	total_y = mode->yres + mode->upper_margin + mode->lower_margin +
 		mode->vsync_len;
 	writel_relaxed((total_y << 16) | total_x, &regs->screen_size);

 	/* vsync ctrl */
 	if (path->output_type == PATH_OUT_DSI)
 		vsync_ctrl = 0x01330133;
 	else
 		vsync_ctrl = ((mode->xres + mode->right_margin) << 16)
 					| (mode->xres + mode->right_margin);
 	writel_relaxed(vsync_ctrl, &regs->vsync_ctrl);

 	/* set pixclock div */
 	sclk_src = clk_get_rate(path_to_ctrl(path)->clk);
 	sclk_div = sclk_src / mode->pixclock_freq;
 	if (sclk_div * mode->pixclock_freq < sclk_src)
 		sclk_div++;

 	dev_info(path->dev, "%s sclk_src %d sclk_div 0x%x pclk %d\n",
 			__func__, sclk_src, sclk_div, mode->pixclock_freq);

 	tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 	tmp &= ~CLK_INT_DIV_MASK;
 	tmp |= sclk_div;
 	writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));

 	mutex_unlock(&path->access_ok);
 }

 static struct mmp_overlay_ops mmphw_overlay_ops = {
 	.set_fetch = overlay_set_fetch,
 	.set_onoff = overlay_set_onoff,
 	.set_win = overlay_set_win,
 	.set_addr = overlay_set_addr,
 };

 static void ctrl_set_default(struct mmphw_ctrl *ctrl)
 {
 	u32 tmp, irq_mask;

 	/*
 	 * LCD Global control(LCD_TOP_CTRL) should be configed before
 	 * any other LCD registers read/write, or there maybe issues.
 	 */
 	tmp = readl_relaxed(ctrl->reg_base + LCD_TOP_CTRL);
 	tmp |= 0xfff0;
 	writel_relaxed(tmp, ctrl->reg_base + LCD_TOP_CTRL);


 	/* disable all interrupts */
 	irq_mask = path_imasks(0) | err_imask(0) |
 		   path_imasks(1) | err_imask(1);
 	tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);
 	tmp &= ~irq_mask;
 	tmp |= irq_mask;
 	writel_relaxed(tmp, ctrl->reg_base + SPU_IRQ_ENA);
 }

 static void path_set_default(struct mmp_path *path)
 {
 	struct lcd_regs *regs = path_regs(path);
 	u32 dma_ctrl1, mask, tmp, path_config;

 	path_config = path_to_path_plat(path)->path_config;

 	/* Configure IOPAD: should be parallel only */
 	if (PATH_OUT_PARALLEL == path->output_type) {
 		mask = CFG_IOPADMODE_MASK | CFG_BURST_MASK | CFG_BOUNDARY_MASK;
 		tmp = readl_relaxed(ctrl_regs(path) + SPU_IOPAD_CONTROL);
 		tmp &= ~mask;
 		tmp |= path_config;
 		writel_relaxed(tmp, ctrl_regs(path) + SPU_IOPAD_CONTROL);
 	}

 	/* Select path clock source */
 	tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
 	tmp &= ~SCLK_SRC_SEL_MASK;
 	tmp |= path_config;
 	writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));

 	/*
 	 * Configure default bits: vsync triggers DMA,
 	 * power save enable, configure alpha registers to
 	 * display 100% graphics, and set pixel command.
 	 */
 	dma_ctrl1 = 0x2032ff81;

 	dma_ctrl1 |= CFG_VSYNC_INV_MASK;
 	writel_relaxed(dma_ctrl1, ctrl_regs(path) + dma_ctrl(1, path->id));

 	/* Configure default register values */
 	writel_relaxed(0x00000000, &regs->blank_color);
 	writel_relaxed(0x00000000, &regs->g_1);
 	writel_relaxed(0x00000000, &regs->g_start);

 	/*
 	 * 1.enable multiple burst request in DMA AXI
 	 * bus arbiter for faster read if not tv path;
 	 * 2.enable horizontal smooth filter;
 	 */
 	mask = CFG_GRA_HSMOOTH_MASK | CFG_DMA_HSMOOTH_MASK | CFG_ARBFAST_ENA(1);
 	tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
 	tmp |= mask;
 	if (PATH_TV == path->id)
 		tmp &= ~CFG_ARBFAST_ENA(1);
 	writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
 }

 static int path_init(struct mmphw_path_plat *path_plat,
 		struct mmp_mach_path_config *config)
 {
 	struct mmphw_ctrl *ctrl = path_plat->ctrl;
 	struct mmp_path_info *path_info;
 	struct mmp_path *path = NULL;

 	dev_info(ctrl->dev, "%s: %s\n", __func__, config->name);

 	/* init driver data */
 	path_info = kzalloc(sizeof(struct mmp_path_info), GFP_KERNEL);
 	if (!path_info) {
 		dev_err(ctrl->dev, "%s: unable to alloc path_info for %s\n",
 				__func__, config->name);
 		return 0;
 	}
 	path_info->name = config->name;
 	path_info->id = path_plat->id;
 	path_info->dev = ctrl->dev;
 	path_info->overlay_num = config->overlay_num;
 	path_info->overlay_ops = &mmphw_overlay_ops;
 	path_info->set_mode = path_set_mode;
 	path_info->plat_data = path_plat;

 	/* create/register platform device */
 	path = mmp_register_path(path_info);
 	if (!path) {
 		kfree(path_info);
 		return 0;
 	}
 	path_plat->path = path;
 	path_plat->path_config = config->path_config;
 	path_plat->link_config = config->link_config;
 	path_plat->dsi_rbswap = config->dsi_rbswap;
 	path_set_default(path);

 	kfree(path_info);
 	return 1;
 }

 static void path_deinit(struct mmphw_path_plat *path_plat)
 {
 	if (!path_plat)
 		return;

 	if (path_plat->path)
 		mmp_unregister_path(path_plat->path);
 }

 static int mmphw_probe(struct platform_device *pdev)
 {
 	struct mmp_mach_plat_info *mi;
 	struct resource *res;
 	int ret, i, size, irq;
 	struct mmphw_path_plat *path_plat;
 	struct mmphw_ctrl *ctrl = NULL;

 	/* get resources from platform data */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (res == NULL) {
 		dev_err(&pdev->dev, "%s: no IO memory defined\n", __func__);
 		ret = -ENOENT;
 		goto failed;
 	}

 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(&pdev->dev, "%s: no IRQ defined\n", __func__);
 		ret = -ENOENT;
 		goto failed;
 	}

 	/* get configs from platform data */
 	mi = pdev->dev.platform_data;
 	if (mi == NULL || !mi->path_num || !mi->paths) {
 		dev_err(&pdev->dev, "%s: no platform data defined\n", __func__);
 		ret = -EINVAL;
 		goto failed;
 	}

 	/* allocate */
 	size = sizeof(struct mmphw_ctrl) + sizeof(struct mmphw_path_plat) *
 	       mi->path_num;
 	ctrl = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 	if (!ctrl) {
 		ret = -ENOMEM;
 		goto failed;
 	}

 	ctrl->name = mi->name;
 	ctrl->path_num = mi->path_num;
 	ctrl->dev = &pdev->dev;
 	ctrl->irq = irq;
 	platform_set_drvdata(pdev, ctrl);
 	mutex_init(&ctrl->access_ok);

 	/* map registers.*/
 	if (!devm_request_mem_region(ctrl->dev, res->start,
 			resource_size(res), ctrl->name)) {
 		dev_err(ctrl->dev,
 			"can't request region for resource %pR\n", res);
 		ret = -EINVAL;
 		goto failed;
 	}

 	ctrl->reg_base = devm_ioremap_nocache(ctrl->dev,
 			res->start, resource_size(res));
 	if (ctrl->reg_base == NULL) {
 		dev_err(ctrl->dev, "%s: res %x - %x map failed\n", __func__,
 			res->start, res->end);
 		ret = -ENOMEM;
 		goto failed;
 	}

 	/* request irq */
 	ret = devm_request_irq(ctrl->dev, ctrl->irq, ctrl_handle_irq,
 		IRQF_SHARED, "lcd_controller", ctrl);
 	if (ret < 0) {
 		dev_err(ctrl->dev, "%s unable to request IRQ %d\n",
 				__func__, ctrl->irq);
 		ret = -ENXIO;
 		goto failed;
 	}

 	/* get clock */
 	ctrl->clk = devm_clk_get(ctrl->dev, mi->clk_name);
 	if (IS_ERR(ctrl->clk)) {
 		dev_err(ctrl->dev, "unable to get clk %s\n", mi->clk_name);
 		ret = -ENOENT;
 		goto failed;
 	}
 	clk_prepare_enable(ctrl->clk);

 	/* init global regs */
 	ctrl_set_default(ctrl);

 	/* init pathes from machine info and register them */
 	for (i = 0; i < ctrl->path_num; i++) {
 		/* get from config and machine info */
 		path_plat = &ctrl->path_plats[i];
 		path_plat->id = i;
 		path_plat->ctrl = ctrl;

 		/* path init */
 		if (!path_init(path_plat, &mi->paths[i])) {
 			ret = -EINVAL;
 			goto failed_path_init;
 		}
 	}

 #ifdef CONFIG_MMP_DISP_SPI
 	ret = lcd_spi_register(ctrl);
 	if (ret < 0)
 		goto failed_path_init;
 #endif

 	dev_info(ctrl->dev, "device init done\n");

 	return 0;

 failed_path_init:
 	for (i = 0; i < ctrl->path_num; i++) {
 		path_plat = &ctrl->path_plats[i];
 		path_deinit(path_plat);
 	}

 	clk_disable_unprepare(ctrl->clk);
 failed:
 	dev_err(&pdev->dev, "device init failed\n");

 	return ret;
 }

 static struct platform_driver mmphw_driver = {
 	.driver		= {
 		.name	= "mmp-disp",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= mmphw_probe,
 };

 static int mmphw_init(void)
 {
 	return platform_driver_register(&mmphw_driver);
 }
 module_init(mmphw_init);

 MODULE_AUTHOR("Li Guoqing<ligq@marvell.com>");
 MODULE_DESCRIPTION("Framebuffer driver for mmp");
 MODULE_LICENSE("GPL");
	/*
	* linux/drivers/video/mmp/hw/mmp_ctrl.c
	* Marvell MMP series Display Controller support
	*
	* Copyright (C) 2012 Marvell Technology Group Ltd.
	* Authors: Guoqing Li <ligq@marvell.com>
	* Lisa Du <cldu@marvell.com>
	* Zhou Zhu <zzhu3@marvell.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*
	* This program is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*
	* You should have received a copy of the GNU General Public License along with
	* this program. If not, see <http://www.gnu.org/licenses/>.
	*
	*/
	#include <linux/module.h>
	#include <linux/moduleparam.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/string.h>
	#include <linux/interrupt.h>
	#include <linux/slab.h>
	#include <linux/delay.h>
	#include <linux/platform_device.h>
	#include <linux/dma-mapping.h>
	#include <linux/clk.h>
	#include <linux/err.h>
	#include <linux/vmalloc.h>
	#include <linux/uaccess.h>
	#include <linux/kthread.h>
	#include <linux/io.h>

	#include "mmp_ctrl.h"

	static irqreturn_t ctrl_handle_irq(int irq, void *dev_id)
	{
	struct mmphw_ctrl ctrl = (struct mmphw_ctrl )dev_id;
	u32 isr, imask, tmp;

	isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
	imask = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);

	do {
	/* clear clock only */
	tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR);
	if (tmp & isr)
	writel_relaxed(~isr, ctrl->reg_base + SPU_IRQ_ISR);
	} while ((isr = readl_relaxed(ctrl->reg_base + SPU_IRQ_ISR)) & imask);

	return IRQ_HANDLED;
	}

	static u32 fmt_to_reg(struct mmp_overlay *overlay, int pix_fmt)
	{
	u32 rbswap = 0, uvswap = 0, yuvswap = 0,
	csc_en = 0, val = 0,
	vid = overlay_is_vid(overlay);

	switch (pix_fmt) {
	case PIXFMT_RGB565:
	case PIXFMT_RGB1555:
	case PIXFMT_RGB888PACK:
	case PIXFMT_RGB888UNPACK:
	case PIXFMT_RGBA888:
	rbswap = 1;
	break;
	case PIXFMT_VYUY:
	case PIXFMT_YVU422P:
	case PIXFMT_YVU420P:
	uvswap = 1;
	break;
	case PIXFMT_YUYV:
	yuvswap = 1;
	break;
	default:
	break;
	}

	switch (pix_fmt) {
	case PIXFMT_RGB565:
	case PIXFMT_BGR565:
	break;
	case PIXFMT_RGB1555:
	case PIXFMT_BGR1555:
	val = 0x1;
	break;
	case PIXFMT_RGB888PACK:
	case PIXFMT_BGR888PACK:
	val = 0x2;
	break;
	case PIXFMT_RGB888UNPACK:
	case PIXFMT_BGR888UNPACK:
	val = 0x3;
	break;
	case PIXFMT_RGBA888:
	case PIXFMT_BGRA888:
	val = 0x4;
	break;
	case PIXFMT_UYVY:
	case PIXFMT_VYUY:
	case PIXFMT_YUYV:
	val = 0x5;
	csc_en = 1;
	break;
	case PIXFMT_YUV422P:
	case PIXFMT_YVU422P:
	val = 0x6;
	csc_en = 1;
	break;
	case PIXFMT_YUV420P:
	case PIXFMT_YVU420P:
	val = 0x7;
	csc_en = 1;
	break;
	default:
	break;
	}

	return (dma_palette(0) \| dma_fmt(vid, val) \|
	dma_swaprb(vid, rbswap) \| dma_swapuv(vid, uvswap) \|
	dma_swapyuv(vid, yuvswap) \| dma_csc(vid, csc_en));
	}

	static void dmafetch_set_fmt(struct mmp_overlay *overlay)
	{
	u32 tmp;
	struct mmp_path *path = overlay->path;
	tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
	tmp &= ~dma_mask(overlay_is_vid(overlay));
	tmp \|= fmt_to_reg(overlay, overlay->win.pix_fmt);
	writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
	}

	static void overlay_set_win(struct mmp_overlay overlay, struct mmp_win win)
	{
	struct lcd_regs *regs = path_regs(overlay->path);

	/* assert win supported */
	memcpy(&overlay->win, win, sizeof(struct mmp_win));

	mutex_lock(&overlay->access_ok);

	if (overlay_is_vid(overlay)) {
	writel_relaxed(win->pitch[0], &regs->v_pitch_yc);
	writel_relaxed(win->pitch[2] << 16 \|
	win->pitch[1], &regs->v_pitch_uv);

	writel_relaxed((win->ysrc << 16) \| win->xsrc, &regs->v_size);
	writel_relaxed((win->ydst << 16) \| win->xdst, &regs->v_size_z);
	writel_relaxed(win->ypos << 16 \| win->xpos, &regs->v_start);
	} else {
	writel_relaxed(win->pitch[0], &regs->g_pitch);

	writel_relaxed((win->ysrc << 16) \| win->xsrc, &regs->g_size);
	writel_relaxed((win->ydst << 16) \| win->xdst, &regs->g_size_z);
	writel_relaxed(win->ypos << 16 \| win->xpos, &regs->g_start);
	}

	dmafetch_set_fmt(overlay);
	mutex_unlock(&overlay->access_ok);
	}

	static void dmafetch_onoff(struct mmp_overlay *overlay, int on)
	{
	u32 mask = overlay_is_vid(overlay) ? CFG_DMA_ENA_MASK :
	CFG_GRA_ENA_MASK;
	u32 enable = overlay_is_vid(overlay) ? CFG_DMA_ENA(1) : CFG_GRA_ENA(1);
	u32 tmp;
	struct mmp_path *path = overlay->path;

	mutex_lock(&overlay->access_ok);
	tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
	tmp &= ~mask;
	tmp \|= (on ? enable : 0);
	writel(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
	mutex_unlock(&overlay->access_ok);
	}

	static void path_enabledisable(struct mmp_path *path, int on)
	{
	u32 tmp;
	mutex_lock(&path->access_ok);
	tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
	if (on)
	tmp &= ~SCLK_DISABLE;
	else
	tmp \|= SCLK_DISABLE;
	writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));
	mutex_unlock(&path->access_ok);
	}

	static void path_onoff(struct mmp_path *path, int on)
	{
	if (path->status == on) {
	dev_info(path->dev, "path %s is already %s\n",
	path->name, stat_name(path->status));
	return;
	}

	if (on) {
	path_enabledisable(path, 1);

	if (path->panel && path->panel->set_onoff)
	path->panel->set_onoff(path->panel, 1);
	} else {
	if (path->panel && path->panel->set_onoff)
	path->panel->set_onoff(path->panel, 0);

	path_enabledisable(path, 0);
	}
	path->status = on;
	}

	static void overlay_set_onoff(struct mmp_overlay *overlay, int on)
	{
	if (overlay->status == on) {
	dev_info(overlay_to_ctrl(overlay)->dev, "overlay %s is already %s\n",
	overlay->path->name, stat_name(overlay->status));
	return;
	}
	overlay->status = on;
	dmafetch_onoff(overlay, on);
	if (overlay->path->ops.check_status(overlay->path)
	!= overlay->path->status)
	path_onoff(overlay->path, on);
	}

	static void overlay_set_fetch(struct mmp_overlay *overlay, int fetch_id)
	{
	overlay->dmafetch_id = fetch_id;
	}

	static int overlay_set_addr(struct mmp_overlay overlay, struct mmp_addr addr)
	{
	struct lcd_regs *regs = path_regs(overlay->path);

	/* FIXME: assert addr supported */
	memcpy(&overlay->addr, addr, sizeof(struct mmp_addr));

	if (overlay_is_vid(overlay)) {
	writel_relaxed(addr->phys[0], &regs->v_y0);
	writel_relaxed(addr->phys[1], &regs->v_u0);
	writel_relaxed(addr->phys[2], &regs->v_v0);
	} else
	writel_relaxed(addr->phys[0], &regs->g_0);

	return overlay->addr.phys[0];
	}

	static void path_set_mode(struct mmp_path path, struct mmp_mode mode)
	{
	struct lcd_regs *regs = path_regs(path);
	u32 total_x, total_y, vsync_ctrl, tmp, sclk_src, sclk_div,
	link_config = path_to_path_plat(path)->link_config,
	dsi_rbswap = path_to_path_plat(path)->link_config;

	/* FIXME: assert videomode supported */
	memcpy(&path->mode, mode, sizeof(struct mmp_mode));

	mutex_lock(&path->access_ok);

	/* polarity of timing signals */
	tmp = readl_relaxed(ctrl_regs(path) + intf_ctrl(path->id)) & 0x1;
	tmp \|= mode->vsync_invert ? 0 : 0x8;
	tmp \|= mode->hsync_invert ? 0 : 0x4;
	tmp \|= link_config & CFG_DUMBMODE_MASK;
	tmp \|= CFG_DUMB_ENA(1);
	writel_relaxed(tmp, ctrl_regs(path) + intf_ctrl(path->id));

	/* interface rb_swap setting */
	tmp = readl_relaxed(ctrl_regs(path) + intf_rbswap_ctrl(path->id)) &
	(~(CFG_INTFRBSWAP_MASK));
	tmp \|= dsi_rbswap & CFG_INTFRBSWAP_MASK;
	writel_relaxed(tmp, ctrl_regs(path) + intf_rbswap_ctrl(path->id));

	writel_relaxed((mode->yres << 16) \| mode->xres, &regs->screen_active);
	writel_relaxed((mode->left_margin << 16) \| mode->right_margin,
	&regs->screen_h_porch);
	writel_relaxed((mode->upper_margin << 16) \| mode->lower_margin,
	&regs->screen_v_porch);
	total_x = mode->xres + mode->left_margin + mode->right_margin +
	mode->hsync_len;
	total_y = mode->yres + mode->upper_margin + mode->lower_margin +
	mode->vsync_len;
	writel_relaxed((total_y << 16) \| total_x, &regs->screen_size);

	/* vsync ctrl */
	if (path->output_type == PATH_OUT_DSI)
	vsync_ctrl = 0x01330133;
	else
	vsync_ctrl = ((mode->xres + mode->right_margin) << 16)
	\| (mode->xres + mode->right_margin);
	writel_relaxed(vsync_ctrl, &regs->vsync_ctrl);

	/* set pixclock div */
	sclk_src = clk_get_rate(path_to_ctrl(path)->clk);
	sclk_div = sclk_src / mode->pixclock_freq;
	if (sclk_div * mode->pixclock_freq < sclk_src)
	sclk_div++;

	dev_info(path->dev, "%s sclk_src %d sclk_div 0x%x pclk %d\n",
	__func__, sclk_src, sclk_div, mode->pixclock_freq);

	tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
	tmp &= ~CLK_INT_DIV_MASK;
	tmp \|= sclk_div;
	writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));

	mutex_unlock(&path->access_ok);
	}

	static struct mmp_overlay_ops mmphw_overlay_ops = {
	.set_fetch = overlay_set_fetch,
	.set_onoff = overlay_set_onoff,
	.set_win = overlay_set_win,
	.set_addr = overlay_set_addr,
	};

	static void ctrl_set_default(struct mmphw_ctrl *ctrl)
	{
	u32 tmp, irq_mask;

	/*
	* LCD Global control(LCD_TOP_CTRL) should be configed before
	* any other LCD registers read/write, or there maybe issues.
	*/
	tmp = readl_relaxed(ctrl->reg_base + LCD_TOP_CTRL);
	tmp \|= 0xfff0;
	writel_relaxed(tmp, ctrl->reg_base + LCD_TOP_CTRL);


	/* disable all interrupts */
	irq_mask = path_imasks(0) \| err_imask(0) \|
	path_imasks(1) \| err_imask(1);
	tmp = readl_relaxed(ctrl->reg_base + SPU_IRQ_ENA);
	tmp &= ~irq_mask;
	tmp \|= irq_mask;
	writel_relaxed(tmp, ctrl->reg_base + SPU_IRQ_ENA);
	}

	static void path_set_default(struct mmp_path *path)
	{
	struct lcd_regs *regs = path_regs(path);
	u32 dma_ctrl1, mask, tmp, path_config;

	path_config = path_to_path_plat(path)->path_config;

	/* Configure IOPAD: should be parallel only */
	if (PATH_OUT_PARALLEL == path->output_type) {
	mask = CFG_IOPADMODE_MASK \| CFG_BURST_MASK \| CFG_BOUNDARY_MASK;
	tmp = readl_relaxed(ctrl_regs(path) + SPU_IOPAD_CONTROL);
	tmp &= ~mask;
	tmp \|= path_config;
	writel_relaxed(tmp, ctrl_regs(path) + SPU_IOPAD_CONTROL);
	}

	/* Select path clock source */
	tmp = readl_relaxed(ctrl_regs(path) + LCD_SCLK(path));
	tmp &= ~SCLK_SRC_SEL_MASK;
	tmp \|= path_config;
	writel_relaxed(tmp, ctrl_regs(path) + LCD_SCLK(path));

	/*
	* Configure default bits: vsync triggers DMA,
	* power save enable, configure alpha registers to
	* display 100% graphics, and set pixel command.
	*/
	dma_ctrl1 = 0x2032ff81;

	dma_ctrl1 \|= CFG_VSYNC_INV_MASK;
	writel_relaxed(dma_ctrl1, ctrl_regs(path) + dma_ctrl(1, path->id));

	/* Configure default register values */
	writel_relaxed(0x00000000, &regs->blank_color);
	writel_relaxed(0x00000000, &regs->g_1);
	writel_relaxed(0x00000000, &regs->g_start);

	/*
	* 1.enable multiple burst request in DMA AXI
	* bus arbiter for faster read if not tv path;
	* 2.enable horizontal smooth filter;
	*/
	mask = CFG_GRA_HSMOOTH_MASK \| CFG_DMA_HSMOOTH_MASK \| CFG_ARBFAST_ENA(1);
	tmp = readl_relaxed(ctrl_regs(path) + dma_ctrl(0, path->id));
	tmp \|= mask;
	if (PATH_TV == path->id)
	tmp &= ~CFG_ARBFAST_ENA(1);
	writel_relaxed(tmp, ctrl_regs(path) + dma_ctrl(0, path->id));
	}

	static int path_init(struct mmphw_path_plat *path_plat,
	struct mmp_mach_path_config *config)
	{
	struct mmphw_ctrl *ctrl = path_plat->ctrl;
	struct mmp_path_info *path_info;
	struct mmp_path *path = NULL;

	dev_info(ctrl->dev, "%s: %s\n", __func__, config->name);

	/* init driver data */
	path_info = kzalloc(sizeof(struct mmp_path_info), GFP_KERNEL);
	if (!path_info) {
	dev_err(ctrl->dev, "%s: unable to alloc path_info for %s\n",
	__func__, config->name);
	return 0;
	}
	path_info->name = config->name;
	path_info->id = path_plat->id;
	path_info->dev = ctrl->dev;
	path_info->overlay_num = config->overlay_num;
	path_info->overlay_ops = &mmphw_overlay_ops;
	path_info->set_mode = path_set_mode;
	path_info->plat_data = path_plat;

	/* create/register platform device */
	path = mmp_register_path(path_info);
	if (!path) {
	kfree(path_info);
	return 0;
	}
	path_plat->path = path;
	path_plat->path_config = config->path_config;
	path_plat->link_config = config->link_config;
	path_plat->dsi_rbswap = config->dsi_rbswap;
	path_set_default(path);

	kfree(path_info);
	return 1;
	}

	static void path_deinit(struct mmphw_path_plat *path_plat)
	{
	if (!path_plat)
	return;

	if (path_plat->path)
	mmp_unregister_path(path_plat->path);
	}

	static int mmphw_probe(struct platform_device *pdev)
	{
	struct mmp_mach_plat_info *mi;
	struct resource *res;
	int ret, i, size, irq;
	struct mmphw_path_plat *path_plat;
	struct mmphw_ctrl *ctrl = NULL;

	/* get resources from platform data */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
	dev_err(&pdev->dev, "%s: no IO memory defined\n", __func__);
	ret = -ENOENT;
	goto failed;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
	dev_err(&pdev->dev, "%s: no IRQ defined\n", __func__);
	ret = -ENOENT;
	goto failed;
	}

	/* get configs from platform data */
	mi = pdev->dev.platform_data;
	if (mi == NULL \|\| !mi->path_num \|\| !mi->paths) {
	dev_err(&pdev->dev, "%s: no platform data defined\n", __func__);
	ret = -EINVAL;
	goto failed;
	}

	/* allocate */
	size = sizeof(struct mmphw_ctrl) + sizeof(struct mmphw_path_plat) *
	mi->path_num;
	ctrl = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
	if (!ctrl) {
	ret = -ENOMEM;
	goto failed;
	}

	ctrl->name = mi->name;
	ctrl->path_num = mi->path_num;
	ctrl->dev = &pdev->dev;
	ctrl->irq = irq;
	platform_set_drvdata(pdev, ctrl);
	mutex_init(&ctrl->access_ok);

	/* map registers.*/
	if (!devm_request_mem_region(ctrl->dev, res->start,
	resource_size(res), ctrl->name)) {
	dev_err(ctrl->dev,
	"can't request region for resource %pR\n", res);
	ret = -EINVAL;
	goto failed;
	}

	ctrl->reg_base = devm_ioremap_nocache(ctrl->dev,
	res->start, resource_size(res));
	if (ctrl->reg_base == NULL) {
	dev_err(ctrl->dev, "%s: res %x - %x map failed\n", __func__,
	res->start, res->end);
	ret = -ENOMEM;
	goto failed;
	}

	/* request irq */
	ret = devm_request_irq(ctrl->dev, ctrl->irq, ctrl_handle_irq,
	IRQF_SHARED, "lcd_controller", ctrl);
	if (ret < 0) {
	dev_err(ctrl->dev, "%s unable to request IRQ %d\n",
	__func__, ctrl->irq);
	ret = -ENXIO;
	goto failed;
	}

	/* get clock */
	ctrl->clk = devm_clk_get(ctrl->dev, mi->clk_name);
	if (IS_ERR(ctrl->clk)) {
	dev_err(ctrl->dev, "unable to get clk %s\n", mi->clk_name);
	ret = -ENOENT;
	goto failed;
	}
	clk_prepare_enable(ctrl->clk);

	/* init global regs */
	ctrl_set_default(ctrl);

	/* init pathes from machine info and register them */
	for (i = 0; i < ctrl->path_num; i++) {
	/* get from config and machine info */
	path_plat = &ctrl->path_plats[i];
	path_plat->id = i;
	path_plat->ctrl = ctrl;

	/* path init */
	if (!path_init(path_plat, &mi->paths[i])) {
	ret = -EINVAL;
	goto failed_path_init;
	}
	}

	#ifdef CONFIG_MMP_DISP_SPI
	ret = lcd_spi_register(ctrl);
	if (ret < 0)
	goto failed_path_init;
	#endif

	dev_info(ctrl->dev, "device init done\n");

	return 0;

	failed_path_init:
	for (i = 0; i < ctrl->path_num; i++) {
	path_plat = &ctrl->path_plats[i];
	path_deinit(path_plat);
	}

	clk_disable_unprepare(ctrl->clk);
	failed:
	dev_err(&pdev->dev, "device init failed\n");

	return ret;
	}

	static struct platform_driver mmphw_driver = {
	.driver = {
	.name = "mmp-disp",
	.owner = THIS_MODULE,
	},
	.probe = mmphw_probe,
	};

	static int mmphw_init(void)
	{
	return platform_driver_register(&mmphw_driver);
	}
	module_init(mmphw_init);

	MODULE_AUTHOR("Li Guoqing<ligq@marvell.com>");
	MODULE_DESCRIPTION("Framebuffer driver for mmp");
	MODULE_LICENSE("GPL");