drivers/gpu/ipu-v3/ipu-dc.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
  * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
  */

 #include <linux/export.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>

 #include <video/imx-ipu-v3.h>
 #include "ipu-prv.h"

 #define DC_MAP_CONF_PTR(n)	(0x108 + ((n) & ~0x1) * 2)
 #define DC_MAP_CONF_VAL(n)	(0x144 + ((n) & ~0x1) * 2)

 #define DC_EVT_NF		0
 #define DC_EVT_NL		1
 #define DC_EVT_EOF		2
 #define DC_EVT_NFIELD		3
 #define DC_EVT_EOL		4
 #define DC_EVT_EOFIELD		5
 #define DC_EVT_NEW_ADDR		6
 #define DC_EVT_NEW_CHAN		7
 #define DC_EVT_NEW_DATA		8

 #define DC_EVT_NEW_ADDR_W_0	0
 #define DC_EVT_NEW_ADDR_W_1	1
 #define DC_EVT_NEW_CHAN_W_0	2
 #define DC_EVT_NEW_CHAN_W_1	3
 #define DC_EVT_NEW_DATA_W_0	4
 #define DC_EVT_NEW_DATA_W_1	5
 #define DC_EVT_NEW_ADDR_R_0	6
 #define DC_EVT_NEW_ADDR_R_1	7
 #define DC_EVT_NEW_CHAN_R_0	8
 #define DC_EVT_NEW_CHAN_R_1	9
 #define DC_EVT_NEW_DATA_R_0	10
 #define DC_EVT_NEW_DATA_R_1	11

 #define DC_WR_CH_CONF		0x0
 #define DC_WR_CH_ADDR		0x4
 #define DC_RL_CH(evt)		(8 + ((evt) & ~0x1) * 2)

 #define DC_GEN			0xd4
 #define DC_DISP_CONF1(disp)	(0xd8 + (disp) * 4)
 #define DC_DISP_CONF2(disp)	(0xe8 + (disp) * 4)
 #define DC_STAT			0x1c8

 #define WROD(lf)		(0x18 | ((lf) << 1))
 #define WRG			0x01
 #define WCLK			0xc9

 #define SYNC_WAVE 0
 #define NULL_WAVE (-1)

 #define DC_GEN_SYNC_1_6_SYNC	(2 << 1)
 #define DC_GEN_SYNC_PRIORITY_1	(1 << 7)

 #define DC_WR_CH_CONF_WORD_SIZE_8		(0 << 0)
 #define DC_WR_CH_CONF_WORD_SIZE_16		(1 << 0)
 #define DC_WR_CH_CONF_WORD_SIZE_24		(2 << 0)
 #define DC_WR_CH_CONF_WORD_SIZE_32		(3 << 0)
 #define DC_WR_CH_CONF_DISP_ID_PARALLEL(i)	(((i) & 0x1) << 3)
 #define DC_WR_CH_CONF_DISP_ID_SERIAL		(2 << 3)
 #define DC_WR_CH_CONF_DISP_ID_ASYNC		(3 << 4)
 #define DC_WR_CH_CONF_FIELD_MODE		(1 << 9)
 #define DC_WR_CH_CONF_PROG_TYPE_NORMAL		(4 << 5)
 #define DC_WR_CH_CONF_PROG_TYPE_MASK		(7 << 5)
 #define DC_WR_CH_CONF_PROG_DI_ID		(1 << 2)
 #define DC_WR_CH_CONF_PROG_DISP_ID(i)		(((i) & 0x1) << 3)

 #define IPU_DC_NUM_CHANNELS	10

 struct ipu_dc_priv;

 enum ipu_dc_map {
 	IPU_DC_MAP_RGB24,
 	IPU_DC_MAP_RGB565,
 	IPU_DC_MAP_GBR24, /* TVEv2 */
 	IPU_DC_MAP_BGR666,
 	IPU_DC_MAP_LVDS666,
 	IPU_DC_MAP_BGR24,
 };

 struct ipu_dc {
 	/* The display interface number assigned to this dc channel */
 	unsigned int		di;
 	void __iomem		*base;
 	struct ipu_dc_priv	*priv;
 	int			chno;
 	bool			in_use;
 };

 struct ipu_dc_priv {
 	void __iomem		*dc_reg;
 	void __iomem		*dc_tmpl_reg;
 	struct ipu_soc		*ipu;
 	struct device		*dev;
 	struct ipu_dc		channels[IPU_DC_NUM_CHANNELS];
 	struct mutex		mutex;
 	struct completion	comp;
 	int			use_count;
 };

 static void dc_link_event(struct ipu_dc *dc, int event, int addr, int priority)
 {
 	u32 reg;

 	reg = readl(dc->base + DC_RL_CH(event));
 	reg &= ~(0xffff << (16 * (event & 0x1)));
 	reg |= ((addr << 8) | priority) << (16 * (event & 0x1));
 	writel(reg, dc->base + DC_RL_CH(event));
 }

 static void dc_write_tmpl(struct ipu_dc *dc, int word, u32 opcode, u32 operand,
 		int map, int wave, int glue, int sync, int stop)
 {
 	struct ipu_dc_priv *priv = dc->priv;
 	u32 reg1, reg2;

 	if (opcode == WCLK) {
 		reg1 = (operand << 20) & 0xfff00000;
 		reg2 = operand >> 12 | opcode << 1 | stop << 9;
 	} else if (opcode == WRG) {
 		reg1 = sync | glue << 4 | ++wave << 11 | ((operand << 15) & 0xffff8000);
 		reg2 = operand >> 17 | opcode << 7 | stop << 9;
 	} else {
 		reg1 = sync | glue << 4 | ++wave << 11 | ++map << 15 | ((operand << 20) & 0xfff00000);
 		reg2 = operand >> 12 | opcode << 4 | stop << 9;
 	}
 	writel(reg1, priv->dc_tmpl_reg + word * 8);
 	writel(reg2, priv->dc_tmpl_reg + word * 8 + 4);
 }

 static int ipu_bus_format_to_map(u32 fmt)
 {
 	switch (fmt) {
 	default:
 		WARN_ON(1);
 		/* fall-through */
 	case MEDIA_BUS_FMT_RGB888_1X24:
 		return IPU_DC_MAP_RGB24;
 	case MEDIA_BUS_FMT_RGB565_1X16:
 		return IPU_DC_MAP_RGB565;
 	case MEDIA_BUS_FMT_GBR888_1X24:
 		return IPU_DC_MAP_GBR24;
 	case MEDIA_BUS_FMT_RGB666_1X18:
 		return IPU_DC_MAP_BGR666;
 	case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
 		return IPU_DC_MAP_LVDS666;
 	case MEDIA_BUS_FMT_BGR888_1X24:
 		return IPU_DC_MAP_BGR24;
 	}
 }

 int ipu_dc_init_sync(struct ipu_dc *dc, struct ipu_di *di, bool interlaced,
 		u32 bus_format, u32 width)
 {
 	struct ipu_dc_priv *priv = dc->priv;
 	int addr, sync;
 	u32 reg = 0;
 	int map;

 	dc->di = ipu_di_get_num(di);

 	map = ipu_bus_format_to_map(bus_format);

 	/*
 	 * In interlaced mode we need more counters to create the asymmetric
 	 * per-field VSYNC signals. The pixel active signal synchronising DC
 	 * to DI moves to signal generator #6 (see ipu-di.c). In progressive
 	 * mode counter #5 is used.
 	 */
 	sync = interlaced ? 6 : 5;

 	/* Reserve 5 microcode template words for each DI */
 	if (dc->di)
 		addr = 5;
 	else
 		addr = 0;

 	if (interlaced) {
 		dc_link_event(dc, DC_EVT_NL, addr, 3);
 		dc_link_event(dc, DC_EVT_EOL, addr, 2);
 		dc_link_event(dc, DC_EVT_NEW_DATA, addr, 1);

 		/* Init template microcode */
 		dc_write_tmpl(dc, addr, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
 	} else {
 		dc_link_event(dc, DC_EVT_NL, addr + 2, 3);
 		dc_link_event(dc, DC_EVT_EOL, addr + 3, 2);
 		dc_link_event(dc, DC_EVT_NEW_DATA, addr + 1, 1);

 		/* Init template microcode */
 		dc_write_tmpl(dc, addr + 2, WROD(0), 0, map, SYNC_WAVE, 8, sync, 1);
 		dc_write_tmpl(dc, addr + 3, WROD(0), 0, map, SYNC_WAVE, 4, sync, 0);
 		dc_write_tmpl(dc, addr + 4, WRG, 0, map, NULL_WAVE, 0, 0, 1);
 		dc_write_tmpl(dc, addr + 1, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
 	}

 	dc_link_event(dc, DC_EVT_NF, 0, 0);
 	dc_link_event(dc, DC_EVT_NFIELD, 0, 0);
 	dc_link_event(dc, DC_EVT_EOF, 0, 0);
 	dc_link_event(dc, DC_EVT_EOFIELD, 0, 0);
 	dc_link_event(dc, DC_EVT_NEW_CHAN, 0, 0);
 	dc_link_event(dc, DC_EVT_NEW_ADDR, 0, 0);

 	reg = readl(dc->base + DC_WR_CH_CONF);
 	if (interlaced)
 		reg |= DC_WR_CH_CONF_FIELD_MODE;
 	else
 		reg &= ~DC_WR_CH_CONF_FIELD_MODE;
 	writel(reg, dc->base + DC_WR_CH_CONF);

 	writel(0x0, dc->base + DC_WR_CH_ADDR);
 	writel(width, priv->dc_reg + DC_DISP_CONF2(dc->di));

 	return 0;
 }
 EXPORT_SYMBOL_GPL(ipu_dc_init_sync);

 void ipu_dc_enable(struct ipu_soc *ipu)
 {
 	struct ipu_dc_priv *priv = ipu->dc_priv;

 	mutex_lock(&priv->mutex);

 	if (!priv->use_count)
 		ipu_module_enable(priv->ipu, IPU_CONF_DC_EN);

 	priv->use_count++;

 	mutex_unlock(&priv->mutex);
 }
 EXPORT_SYMBOL_GPL(ipu_dc_enable);

 void ipu_dc_enable_channel(struct ipu_dc *dc)
 {
 	u32 reg;

 	reg = readl(dc->base + DC_WR_CH_CONF);
 	reg |= DC_WR_CH_CONF_PROG_TYPE_NORMAL;
 	writel(reg, dc->base + DC_WR_CH_CONF);
 }
 EXPORT_SYMBOL_GPL(ipu_dc_enable_channel);

 void ipu_dc_disable_channel(struct ipu_dc *dc)
 {
 	u32 val;

 	val = readl(dc->base + DC_WR_CH_CONF);
 	val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
 	writel(val, dc->base + DC_WR_CH_CONF);
 }
 EXPORT_SYMBOL_GPL(ipu_dc_disable_channel);

 void ipu_dc_disable(struct ipu_soc *ipu)
 {
 	struct ipu_dc_priv *priv = ipu->dc_priv;

 	mutex_lock(&priv->mutex);

 	priv->use_count--;
 	if (!priv->use_count)
 		ipu_module_disable(priv->ipu, IPU_CONF_DC_EN);

 	if (priv->use_count < 0)
 		priv->use_count = 0;

 	mutex_unlock(&priv->mutex);
 }
 EXPORT_SYMBOL_GPL(ipu_dc_disable);

 static void ipu_dc_map_config(struct ipu_dc_priv *priv, enum ipu_dc_map map,
 		int byte_num, int offset, int mask)
 {
 	int ptr = map * 3 + byte_num;
 	u32 reg;

 	reg = readl(priv->dc_reg + DC_MAP_CONF_VAL(ptr));
 	reg &= ~(0xffff << (16 * (ptr & 0x1)));
 	reg |= ((offset << 8) | mask) << (16 * (ptr & 0x1));
 	writel(reg, priv->dc_reg + DC_MAP_CONF_VAL(ptr));

 	reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
 	reg &= ~(0x1f << ((16 * (map & 0x1)) + (5 * byte_num)));
 	reg |= ptr << ((16 * (map & 0x1)) + (5 * byte_num));
 	writel(reg, priv->dc_reg + DC_MAP_CONF_PTR(map));
 }

 static void ipu_dc_map_clear(struct ipu_dc_priv *priv, int map)
 {
 	u32 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));

 	writel(reg & ~(0xffff << (16 * (map & 0x1))),
 		     priv->dc_reg + DC_MAP_CONF_PTR(map));
 }

 struct ipu_dc *ipu_dc_get(struct ipu_soc *ipu, int channel)
 {
 	struct ipu_dc_priv *priv = ipu->dc_priv;
 	struct ipu_dc *dc;

 	if (channel >= IPU_DC_NUM_CHANNELS)
 		return ERR_PTR(-ENODEV);

 	dc = &priv->channels[channel];

 	mutex_lock(&priv->mutex);

 	if (dc->in_use) {
 		mutex_unlock(&priv->mutex);
 		return ERR_PTR(-EBUSY);
 	}

 	dc->in_use = true;

 	mutex_unlock(&priv->mutex);

 	return dc;
 }
 EXPORT_SYMBOL_GPL(ipu_dc_get);

 void ipu_dc_put(struct ipu_dc *dc)
 {
 	struct ipu_dc_priv *priv = dc->priv;

 	mutex_lock(&priv->mutex);
 	dc->in_use = false;
 	mutex_unlock(&priv->mutex);
 }
 EXPORT_SYMBOL_GPL(ipu_dc_put);

 int ipu_dc_init(struct ipu_soc *ipu, struct device *dev,
 		unsigned long base, unsigned long template_base)
 {
 	struct ipu_dc_priv *priv;
 	static int channel_offsets[] = { 0, 0x1c, 0x38, 0x54, 0x58, 0x5c,
 		0x78, 0, 0x94, 0xb4};
 	int i;

 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	mutex_init(&priv->mutex);

 	priv->dev = dev;
 	priv->ipu = ipu;
 	priv->dc_reg = devm_ioremap(dev, base, PAGE_SIZE);
 	priv->dc_tmpl_reg = devm_ioremap(dev, template_base, PAGE_SIZE);
 	if (!priv->dc_reg || !priv->dc_tmpl_reg)
 		return -ENOMEM;

 	for (i = 0; i < IPU_DC_NUM_CHANNELS; i++) {
 		priv->channels[i].chno = i;
 		priv->channels[i].priv = priv;
 		priv->channels[i].base = priv->dc_reg + channel_offsets[i];
 	}

 	writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(1) |
 			DC_WR_CH_CONF_PROG_DI_ID,
 			priv->channels[1].base + DC_WR_CH_CONF);
 	writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(0),
 			priv->channels[5].base + DC_WR_CH_CONF);

 	writel(DC_GEN_SYNC_1_6_SYNC | DC_GEN_SYNC_PRIORITY_1,
 		priv->dc_reg + DC_GEN);

 	ipu->dc_priv = priv;

 	dev_dbg(dev, "DC base: 0x%08lx template base: 0x%08lx\n",
 			base, template_base);

 	/* rgb24 */
 	ipu_dc_map_clear(priv, IPU_DC_MAP_RGB24);
 	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 0, 7, 0xff); /* blue */
 	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 1, 15, 0xff); /* green */
 	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 2, 23, 0xff); /* red */

 	/* rgb565 */
 	ipu_dc_map_clear(priv, IPU_DC_MAP_RGB565);
 	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 0, 4, 0xf8); /* blue */
 	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 1, 10, 0xfc); /* green */
 	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 2, 15, 0xf8); /* red */

 	/* gbr24 */
 	ipu_dc_map_clear(priv, IPU_DC_MAP_GBR24);
 	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 2, 15, 0xff); /* green */
 	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 1, 7, 0xff); /* blue */
 	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 0, 23, 0xff); /* red */

 	/* bgr666 */
 	ipu_dc_map_clear(priv, IPU_DC_MAP_BGR666);
 	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 0, 5, 0xfc); /* blue */
 	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 1, 11, 0xfc); /* green */
 	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 2, 17, 0xfc); /* red */

 	/* lvds666 */
 	ipu_dc_map_clear(priv, IPU_DC_MAP_LVDS666);
 	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 0, 5, 0xfc); /* blue */
 	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 1, 13, 0xfc); /* green */
 	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 2, 21, 0xfc); /* red */

 	/* bgr24 */
 	ipu_dc_map_clear(priv, IPU_DC_MAP_BGR24);
 	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 2, 7, 0xff); /* red */
 	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 1, 15, 0xff); /* green */
 	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 0, 23, 0xff); /* blue */

 	return 0;
 }

 void ipu_dc_exit(struct ipu_soc *ipu)
 {
 }
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
	* Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
	*/

	#include <linux/export.h>
	#include <linux/module.h>
	#include <linux/types.h>
	#include <linux/errno.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/io.h>

	#include <video/imx-ipu-v3.h>
	#include "ipu-prv.h"

	#define DC_MAP_CONF_PTR(n) (0x108 + ((n) & ~0x1) * 2)
	#define DC_MAP_CONF_VAL(n) (0x144 + ((n) & ~0x1) * 2)

	#define DC_EVT_NF 0
	#define DC_EVT_NL 1
	#define DC_EVT_EOF 2
	#define DC_EVT_NFIELD 3
	#define DC_EVT_EOL 4
	#define DC_EVT_EOFIELD 5
	#define DC_EVT_NEW_ADDR 6
	#define DC_EVT_NEW_CHAN 7
	#define DC_EVT_NEW_DATA 8

	#define DC_EVT_NEW_ADDR_W_0 0
	#define DC_EVT_NEW_ADDR_W_1 1
	#define DC_EVT_NEW_CHAN_W_0 2
	#define DC_EVT_NEW_CHAN_W_1 3
	#define DC_EVT_NEW_DATA_W_0 4
	#define DC_EVT_NEW_DATA_W_1 5
	#define DC_EVT_NEW_ADDR_R_0 6
	#define DC_EVT_NEW_ADDR_R_1 7
	#define DC_EVT_NEW_CHAN_R_0 8
	#define DC_EVT_NEW_CHAN_R_1 9
	#define DC_EVT_NEW_DATA_R_0 10
	#define DC_EVT_NEW_DATA_R_1 11

	#define DC_WR_CH_CONF 0x0
	#define DC_WR_CH_ADDR 0x4
	#define DC_RL_CH(evt) (8 + ((evt) & ~0x1) * 2)

	#define DC_GEN 0xd4
	#define DC_DISP_CONF1(disp) (0xd8 + (disp) * 4)
	#define DC_DISP_CONF2(disp) (0xe8 + (disp) * 4)
	#define DC_STAT 0x1c8

	#define WROD(lf) (0x18 \| ((lf) << 1))
	#define WRG 0x01
	#define WCLK 0xc9

	#define SYNC_WAVE 0
	#define NULL_WAVE (-1)

	#define DC_GEN_SYNC_1_6_SYNC (2 << 1)
	#define DC_GEN_SYNC_PRIORITY_1 (1 << 7)

	#define DC_WR_CH_CONF_WORD_SIZE_8 (0 << 0)
	#define DC_WR_CH_CONF_WORD_SIZE_16 (1 << 0)
	#define DC_WR_CH_CONF_WORD_SIZE_24 (2 << 0)
	#define DC_WR_CH_CONF_WORD_SIZE_32 (3 << 0)
	#define DC_WR_CH_CONF_DISP_ID_PARALLEL(i) (((i) & 0x1) << 3)
	#define DC_WR_CH_CONF_DISP_ID_SERIAL (2 << 3)
	#define DC_WR_CH_CONF_DISP_ID_ASYNC (3 << 4)
	#define DC_WR_CH_CONF_FIELD_MODE (1 << 9)
	#define DC_WR_CH_CONF_PROG_TYPE_NORMAL (4 << 5)
	#define DC_WR_CH_CONF_PROG_TYPE_MASK (7 << 5)
	#define DC_WR_CH_CONF_PROG_DI_ID (1 << 2)
	#define DC_WR_CH_CONF_PROG_DISP_ID(i) (((i) & 0x1) << 3)

	#define IPU_DC_NUM_CHANNELS 10

	struct ipu_dc_priv;

	enum ipu_dc_map {
	IPU_DC_MAP_RGB24,
	IPU_DC_MAP_RGB565,
	IPU_DC_MAP_GBR24, /* TVEv2 */
	IPU_DC_MAP_BGR666,
	IPU_DC_MAP_LVDS666,
	IPU_DC_MAP_BGR24,
	};

	struct ipu_dc {
	/* The display interface number assigned to this dc channel */
	unsigned int di;
	void __iomem *base;
	struct ipu_dc_priv *priv;
	int chno;
	bool in_use;
	};

	struct ipu_dc_priv {
	void __iomem *dc_reg;
	void __iomem *dc_tmpl_reg;
	struct ipu_soc *ipu;
	struct device *dev;
	struct ipu_dc channels[IPU_DC_NUM_CHANNELS];
	struct mutex mutex;
	struct completion comp;
	int use_count;
	};

	static void dc_link_event(struct ipu_dc *dc, int event, int addr, int priority)
	{
	u32 reg;

	reg = readl(dc->base + DC_RL_CH(event));
	reg &= ~(0xffff << (16 * (event & 0x1)));
	reg \|= ((addr << 8) \| priority) << (16 * (event & 0x1));
	writel(reg, dc->base + DC_RL_CH(event));
	}

	static void dc_write_tmpl(struct ipu_dc *dc, int word, u32 opcode, u32 operand,
	int map, int wave, int glue, int sync, int stop)
	{
	struct ipu_dc_priv *priv = dc->priv;
	u32 reg1, reg2;

	if (opcode == WCLK) {
	reg1 = (operand << 20) & 0xfff00000;
	reg2 = operand >> 12 \| opcode << 1 \| stop << 9;
	} else if (opcode == WRG) {
	reg1 = sync \| glue << 4 \| ++wave << 11 \| ((operand << 15) & 0xffff8000);
	reg2 = operand >> 17 \| opcode << 7 \| stop << 9;
	} else {
	reg1 = sync \| glue << 4 \| ++wave << 11 \| ++map << 15 \| ((operand << 20) & 0xfff00000);
	reg2 = operand >> 12 \| opcode << 4 \| stop << 9;
	}
	writel(reg1, priv->dc_tmpl_reg + word * 8);
	writel(reg2, priv->dc_tmpl_reg + word * 8 + 4);
	}

	static int ipu_bus_format_to_map(u32 fmt)
	{
	switch (fmt) {
	default:
	WARN_ON(1);
	/* fall-through */
	case MEDIA_BUS_FMT_RGB888_1X24:
	return IPU_DC_MAP_RGB24;
	case MEDIA_BUS_FMT_RGB565_1X16:
	return IPU_DC_MAP_RGB565;
	case MEDIA_BUS_FMT_GBR888_1X24:
	return IPU_DC_MAP_GBR24;
	case MEDIA_BUS_FMT_RGB666_1X18:
	return IPU_DC_MAP_BGR666;
	case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
	return IPU_DC_MAP_LVDS666;
	case MEDIA_BUS_FMT_BGR888_1X24:
	return IPU_DC_MAP_BGR24;
	}
	}

	int ipu_dc_init_sync(struct ipu_dc dc, struct ipu_di di, bool interlaced,
	u32 bus_format, u32 width)
	{
	struct ipu_dc_priv *priv = dc->priv;
	int addr, sync;
	u32 reg = 0;
	int map;

	dc->di = ipu_di_get_num(di);

	map = ipu_bus_format_to_map(bus_format);

	/*
	* In interlaced mode we need more counters to create the asymmetric
	* per-field VSYNC signals. The pixel active signal synchronising DC
	* to DI moves to signal generator #6 (see ipu-di.c). In progressive
	* mode counter #5 is used.
	*/
	sync = interlaced ? 6 : 5;

	/* Reserve 5 microcode template words for each DI */
	if (dc->di)
	addr = 5;
	else
	addr = 0;

	if (interlaced) {
	dc_link_event(dc, DC_EVT_NL, addr, 3);
	dc_link_event(dc, DC_EVT_EOL, addr, 2);
	dc_link_event(dc, DC_EVT_NEW_DATA, addr, 1);

	/* Init template microcode */
	dc_write_tmpl(dc, addr, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
	} else {
	dc_link_event(dc, DC_EVT_NL, addr + 2, 3);
	dc_link_event(dc, DC_EVT_EOL, addr + 3, 2);
	dc_link_event(dc, DC_EVT_NEW_DATA, addr + 1, 1);

	/* Init template microcode */
	dc_write_tmpl(dc, addr + 2, WROD(0), 0, map, SYNC_WAVE, 8, sync, 1);
	dc_write_tmpl(dc, addr + 3, WROD(0), 0, map, SYNC_WAVE, 4, sync, 0);
	dc_write_tmpl(dc, addr + 4, WRG, 0, map, NULL_WAVE, 0, 0, 1);
	dc_write_tmpl(dc, addr + 1, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
	}

	dc_link_event(dc, DC_EVT_NF, 0, 0);
	dc_link_event(dc, DC_EVT_NFIELD, 0, 0);
	dc_link_event(dc, DC_EVT_EOF, 0, 0);
	dc_link_event(dc, DC_EVT_EOFIELD, 0, 0);
	dc_link_event(dc, DC_EVT_NEW_CHAN, 0, 0);
	dc_link_event(dc, DC_EVT_NEW_ADDR, 0, 0);

	reg = readl(dc->base + DC_WR_CH_CONF);
	if (interlaced)
	reg \|= DC_WR_CH_CONF_FIELD_MODE;
	else
	reg &= ~DC_WR_CH_CONF_FIELD_MODE;
	writel(reg, dc->base + DC_WR_CH_CONF);

	writel(0x0, dc->base + DC_WR_CH_ADDR);
	writel(width, priv->dc_reg + DC_DISP_CONF2(dc->di));

	return 0;
	}
	EXPORT_SYMBOL_GPL(ipu_dc_init_sync);

	void ipu_dc_enable(struct ipu_soc *ipu)
	{
	struct ipu_dc_priv *priv = ipu->dc_priv;

	mutex_lock(&priv->mutex);

	if (!priv->use_count)
	ipu_module_enable(priv->ipu, IPU_CONF_DC_EN);

	priv->use_count++;

	mutex_unlock(&priv->mutex);
	}
	EXPORT_SYMBOL_GPL(ipu_dc_enable);

	void ipu_dc_enable_channel(struct ipu_dc *dc)
	{
	u32 reg;

	reg = readl(dc->base + DC_WR_CH_CONF);
	reg \|= DC_WR_CH_CONF_PROG_TYPE_NORMAL;
	writel(reg, dc->base + DC_WR_CH_CONF);
	}
	EXPORT_SYMBOL_GPL(ipu_dc_enable_channel);

	void ipu_dc_disable_channel(struct ipu_dc *dc)
	{
	u32 val;

	val = readl(dc->base + DC_WR_CH_CONF);
	val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
	writel(val, dc->base + DC_WR_CH_CONF);
	}
	EXPORT_SYMBOL_GPL(ipu_dc_disable_channel);

	void ipu_dc_disable(struct ipu_soc *ipu)
	{
	struct ipu_dc_priv *priv = ipu->dc_priv;

	mutex_lock(&priv->mutex);

	priv->use_count--;
	if (!priv->use_count)
	ipu_module_disable(priv->ipu, IPU_CONF_DC_EN);

	if (priv->use_count < 0)
	priv->use_count = 0;

	mutex_unlock(&priv->mutex);
	}
	EXPORT_SYMBOL_GPL(ipu_dc_disable);

	static void ipu_dc_map_config(struct ipu_dc_priv *priv, enum ipu_dc_map map,
	int byte_num, int offset, int mask)
	{
	int ptr = map * 3 + byte_num;
	u32 reg;

	reg = readl(priv->dc_reg + DC_MAP_CONF_VAL(ptr));
	reg &= ~(0xffff << (16 * (ptr & 0x1)));
	reg \|= ((offset << 8) \| mask) << (16 * (ptr & 0x1));
	writel(reg, priv->dc_reg + DC_MAP_CONF_VAL(ptr));

	reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
	reg &= ~(0x1f << ((16 * (map & 0x1)) + (5 * byte_num)));
	reg \|= ptr << ((16 * (map & 0x1)) + (5 * byte_num));
	writel(reg, priv->dc_reg + DC_MAP_CONF_PTR(map));
	}

	static void ipu_dc_map_clear(struct ipu_dc_priv *priv, int map)
	{
	u32 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));

	writel(reg & ~(0xffff << (16 * (map & 0x1))),
	priv->dc_reg + DC_MAP_CONF_PTR(map));
	}

	struct ipu_dc ipu_dc_get(struct ipu_soc ipu, int channel)
	{
	struct ipu_dc_priv *priv = ipu->dc_priv;
	struct ipu_dc *dc;

	if (channel >= IPU_DC_NUM_CHANNELS)
	return ERR_PTR(-ENODEV);

	dc = &priv->channels[channel];

	mutex_lock(&priv->mutex);

	if (dc->in_use) {
	mutex_unlock(&priv->mutex);
	return ERR_PTR(-EBUSY);
	}

	dc->in_use = true;

	mutex_unlock(&priv->mutex);

	return dc;
	}
	EXPORT_SYMBOL_GPL(ipu_dc_get);

	void ipu_dc_put(struct ipu_dc *dc)
	{
	struct ipu_dc_priv *priv = dc->priv;

	mutex_lock(&priv->mutex);
	dc->in_use = false;
	mutex_unlock(&priv->mutex);
	}
	EXPORT_SYMBOL_GPL(ipu_dc_put);

	int ipu_dc_init(struct ipu_soc ipu, struct device dev,
	unsigned long base, unsigned long template_base)
	{
	struct ipu_dc_priv *priv;
	static int channel_offsets[] = { 0, 0x1c, 0x38, 0x54, 0x58, 0x5c,
	0x78, 0, 0x94, 0xb4};
	int i;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	mutex_init(&priv->mutex);

	priv->dev = dev;
	priv->ipu = ipu;
	priv->dc_reg = devm_ioremap(dev, base, PAGE_SIZE);
	priv->dc_tmpl_reg = devm_ioremap(dev, template_base, PAGE_SIZE);
	if (!priv->dc_reg \|\| !priv->dc_tmpl_reg)
	return -ENOMEM;

	for (i = 0; i < IPU_DC_NUM_CHANNELS; i++) {
	priv->channels[i].chno = i;
	priv->channels[i].priv = priv;
	priv->channels[i].base = priv->dc_reg + channel_offsets[i];
	}

	writel(DC_WR_CH_CONF_WORD_SIZE_24 \| DC_WR_CH_CONF_DISP_ID_PARALLEL(1) \|
	DC_WR_CH_CONF_PROG_DI_ID,
	priv->channels[1].base + DC_WR_CH_CONF);
	writel(DC_WR_CH_CONF_WORD_SIZE_24 \| DC_WR_CH_CONF_DISP_ID_PARALLEL(0),
	priv->channels[5].base + DC_WR_CH_CONF);

	writel(DC_GEN_SYNC_1_6_SYNC \| DC_GEN_SYNC_PRIORITY_1,
	priv->dc_reg + DC_GEN);

	ipu->dc_priv = priv;

	dev_dbg(dev, "DC base: 0x%08lx template base: 0x%08lx\n",
	base, template_base);

	/* rgb24 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_RGB24);
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 0, 7, 0xff); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 1, 15, 0xff); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 2, 23, 0xff); /* red */

	/* rgb565 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_RGB565);
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 0, 4, 0xf8); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 1, 10, 0xfc); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 2, 15, 0xf8); /* red */

	/* gbr24 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_GBR24);
	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 2, 15, 0xff); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 1, 7, 0xff); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 0, 23, 0xff); /* red */

	/* bgr666 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_BGR666);
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 0, 5, 0xfc); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 1, 11, 0xfc); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 2, 17, 0xfc); /* red */

	/* lvds666 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_LVDS666);
	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 0, 5, 0xfc); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 1, 13, 0xfc); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 2, 21, 0xfc); /* red */

	/* bgr24 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_BGR24);
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 2, 7, 0xff); /* red */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 1, 15, 0xff); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 0, 23, 0xff); /* blue */

	return 0;
	}

	void ipu_dc_exit(struct ipu_soc *ipu)
	{
	}