1 files changed, 573 insertions, 590 deletions

diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index b048417247e8..facffc254976 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -23,40 +23,16 @@
 #include <linux/console.h>
 #include <linux/backlight.h>
 #include <linux/gpio.h>
+#include <linux/module.h>
 #include <video/sh_mobile_lcdc.h>
+#include <video/sh_mobile_meram.h>
 #include <linux/atomic.h>
 
 #include "sh_mobile_lcdcfb.h"
-#include "sh_mobile_meram.h"
 
 #define SIDE_B_OFFSET 0x1000
 #define MIRROR_OFFSET 0x2000
 
-/* shared registers */
-#define _LDDCKR 0x410
-#define _LDDCKSTPR 0x414
-#define _LDINTR 0x468
-#define _LDSR 0x46c
-#define _LDCNT1R 0x470
-#define _LDCNT2R 0x474
-#define _LDRCNTR 0x478
-#define _LDDDSR 0x47c
-#define _LDDWD0R 0x800
-#define _LDDRDR 0x840
-#define _LDDWAR 0x900
-#define _LDDRAR 0x904
-
-/* shared registers and their order for context save/restore */
-static int lcdc_shared_regs[] = {
-	_LDDCKR,
-	_LDDCKSTPR,
-	_LDINTR,
-	_LDDDSR,
-	_LDCNT1R,
-	_LDCNT2R,
-};
-#define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
-
 #define MAX_XRES 1920
 #define MAX_YRES 1080
 
@@ -98,22 +74,6 @@ static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
 	[LDPMR] = 0x63c,
 };
 
-#define START_LCDC	0x00000001
-#define LCDC_RESET	0x00000100
-#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
-#define LDRCNTR_SRS	0x00020000
-#define LDRCNTR_SRC	0x00010000
-#define LDRCNTR_MRS	0x00000002
-#define LDRCNTR_MRC	0x00000001
-#define LDSR_MRS	0x00000100
-
 static const struct fb_videomode default_720p = {
 	.name = "HDMI 720p",
 	.xres = 1280,
@@ -141,7 +101,6 @@ struct sh_mobile_lcdc_priv {
 	unsigned long lddckr;
 	struct sh_mobile_lcdc_chan ch[2];
 	struct notifier_block notifier;
-	unsigned long saved_shared_regs[NR_SHARED_REGS];
 	int started;
 	int forced_bpp; /* 2 channel LCDC must share bpp setting */
 	struct sh_mobile_meram_info *meram_dev;
@@ -218,33 +177,36 @@ static void lcdc_sys_write_index(void *handle, unsigned long data)
 {
 	struct sh_mobile_lcdc_chan *ch = handle;
 
-	lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
-	lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
-	lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
-	lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
+	lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
+	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
+	lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
+		   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
+	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 }
 
 static void lcdc_sys_write_data(void *handle, unsigned long data)
 {
 	struct sh_mobile_lcdc_chan *ch = handle;
 
-	lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
-	lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
-	lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
-	lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
+	lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
+	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
+	lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
+		   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
+	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 }
 
 static unsigned long lcdc_sys_read_data(void *handle)
 {
 	struct sh_mobile_lcdc_chan *ch = handle;
 
-	lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
-	lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
-	lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
+	lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
+	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
+	lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
+		   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 	udelay(1);
-	lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
+	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 
-	return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
+	return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 }
 
 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
@@ -256,18 +218,22 @@ struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 {
 	if (atomic_inc_and_test(&priv->hw_usecnt)) {
-		pm_runtime_get_sync(priv->dev);
 		if (priv->dot_clk)
 			clk_enable(priv->dot_clk);
+		pm_runtime_get_sync(priv->dev);
+		if (priv->meram_dev && priv->meram_dev->pdev)
+			pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
 	}
 }
 
 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 {
 	if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
+		if (priv->meram_dev && priv->meram_dev->pdev)
+			pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
+		pm_runtime_put(priv->dev);
 		if (priv->dot_clk)
 			clk_disable(priv->dot_clk);
-		pm_runtime_put(priv->dev);
 	}
 }
 
@@ -319,13 +285,13 @@ static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 		if (bcfg->start_transfer)
 			bcfg->start_transfer(bcfg->board_data, ch,
 					     &sh_mobile_lcdc_sys_bus_ops);
-		lcdc_write_chan(ch, LDSM2R, 1);
+		lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 		dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 	} else {
 		if (bcfg->start_transfer)
 			bcfg->start_transfer(bcfg->board_data, ch,
 					     &sh_mobile_lcdc_sys_bus_ops);
-		lcdc_write_chan(ch, LDSM2R, 1);
+		lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 	}
 }
 
@@ -341,22 +307,16 @@ static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 {
 	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 */
-	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);
+	/* Acknowledge interrupts and disable further VSYNC End IRQs. */
+	ldintr = lcdc_read(priv, _LDINTR);
+	lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 
 	/* figure out if this interrupt is for main or sub lcd */
-	is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
+	is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 
 	/* wake up channel and disable clocks */
 	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
@@ -365,7 +325,7 @@ static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 		if (!ch->enabled)
 			continue;
 
-		/* Frame Start */
+		/* Frame End */
 		if (ldintr & LDINTR_FS) {
 			if (is_sub == lcdc_chan_is_sublcd(ch)) {
 				ch->frame_end = 1;
@@ -391,16 +351,17 @@ static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 
 	/* start or stop the lcdc */
 	if (start)
-		lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
+		lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 	else
-		lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
+		lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 
 	/* wait until power is applied/stopped on all channels */
 	for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 		if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 			while (1) {
-				tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
-				if (start && tmp == 3)
+				tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
+				    & LDPMR_LPS;
+				if (start && tmp == LDPMR_LPS)
 					break;
 				if (!start && tmp == 0)
 					break;
@@ -418,13 +379,13 @@ static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 	u32 tmp;
 
 	tmp = ch->ldmt1r_value;
-	tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
-	tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
-	tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
-	tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
-	tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
-	tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
-	tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
+	tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
+	tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
+	tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
+	tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
+	tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
+	tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
+	tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 	lcdc_write_chan(ch, LDMT1R, tmp);
 
 	/* setup SYS bus */
@@ -463,242 +424,239 @@ static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 	lcdc_write_chan(ch, LDHAJR, tmp);
 }
 
-static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
+/*
+ * __sh_mobile_lcdc_start - Configure and tart the LCDC
+ * @priv: LCDC device
+ *
+ * Configure all enabled channels and start the LCDC device. All external
+ * devices (clocks, MERAM, panels, ...) are not touched by this function.
+ */
+static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 {
 	struct sh_mobile_lcdc_chan *ch;
-	struct sh_mobile_lcdc_board_cfg	*board_cfg;
 	unsigned long tmp;
 	int bpp = 0;
-	unsigned long ldddsr;
-	int k, m, ret;
+	int k, m;
 
-	/* enable clocks before accessing the hardware */
-	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
-		if (priv->ch[k].enabled) {
-			sh_mobile_lcdc_clk_on(priv);
-			if (!bpp)
-				bpp = priv->ch[k].info->var.bits_per_pixel;
-		}
-	}
-
-	/* reset */
-	lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
-	lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
-
-	/* enable LCDC channels */
-	tmp = lcdc_read(priv, _LDCNT2R);
-	tmp |= priv->ch[0].enabled;
-	tmp |= priv->ch[1].enabled;
-	lcdc_write(priv, _LDCNT2R, tmp);
-
-	/* read data from external memory, avoid using the BEU for now */
-	lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
+	/* Enable LCDC channels. Read data from external memory, avoid using the
+	 * BEU for now.
+	 */
+	lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 
-	/* stop the lcdc first */
+	/* Stop the LCDC first and disable all interrupts. */
 	sh_mobile_lcdc_start_stop(priv, 0);
+	lcdc_write(priv, _LDINTR, 0);
 
-	/* configure clocks */
+	/* Configure power supply, dot clocks and start them. */
 	tmp = priv->lddckr;
 	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 		ch = &priv->ch[k];
-
-		if (!priv->ch[k].enabled)
+		if (!ch->enabled)
 			continue;
 
+		if (!bpp)
+			bpp = ch->info->var.bits_per_pixel;
+
+		/* Power supply */
+		lcdc_write_chan(ch, LDPMR, 0);
+
 		m = ch->cfg.clock_divider;
 		if (!m)
 			continue;
 
-		if (m == 1)
-			m = 1 << 6;
-		tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
-
-		/* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
+		/* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
+		 * denominator.
+		 */
 		lcdc_write_chan(ch, LDDCKPAT1R, 0);
 		lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
+
+		if (m == 1)
+			m = LDDCKR_MOSEL;
+		tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 	}
 
 	lcdc_write(priv, _LDDCKR, tmp);
-
-	/* start dotclock again */
 	lcdc_write(priv, _LDDCKSTPR, 0);
 	lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 
-	/* interrupts are disabled to begin with */
-	lcdc_write(priv, _LDINTR, 0);
-
+	/* Setup geometry, format, frame buffer memory and operation mode. */
 	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 		ch = &priv->ch[k];
-
 		if (!ch->enabled)
 			continue;
 
 		sh_mobile_lcdc_geometry(ch);
 
-		/* power supply */
-		lcdc_write_chan(ch, LDPMR, 0);
-
-		board_cfg = &ch->cfg.board_cfg;
-		if (board_cfg->setup_sys) {
-			ret = board_cfg->setup_sys(board_cfg->board_data,
-						ch, &sh_mobile_lcdc_sys_bus_ops);
-			if (ret)
-				return ret;
-		}
-	}
-
-	/* word and long word swap */
-	ldddsr = lcdc_read(priv, _LDDDSR);
-	if  (priv->ch[0].info->var.nonstd)
-		lcdc_write(priv, _LDDDSR, ldddsr | 7);
-	else {
-		switch (bpp) {
-		case 16:
-			lcdc_write(priv, _LDDDSR, ldddsr | 6);
-			break;
-		case 24:
-			lcdc_write(priv, _LDDDSR, ldddsr | 7);
-			break;
-		case 32:
-			lcdc_write(priv, _LDDDSR, ldddsr | 4);
-			break;
-		}
-	}
-
-	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
-		unsigned long base_addr_y;
-		unsigned long base_addr_c = 0;
-		int pitch;
-		ch = &priv->ch[k];
-
-		if (!priv->ch[k].enabled)
-			continue;
-
-		/* set bpp format in PKF[4:0] */
-		tmp = lcdc_read_chan(ch, LDDFR);
-		tmp &= ~0x0003031f;
 		if (ch->info->var.nonstd) {
-			tmp |= (ch->info->var.nonstd << 16);
+			tmp = (ch->info->var.nonstd << 16);
 			switch (ch->info->var.bits_per_pixel) {
 			case 12:
+				tmp |= LDDFR_YF_420;
 				break;
 			case 16:
-				tmp |= (0x1 << 8);
+				tmp |= LDDFR_YF_422;
 				break;
 			case 24:
-				tmp |= (0x2 << 8);
+			default:
+				tmp |= LDDFR_YF_444;
 				break;
 			}
 		} else {
 			switch (ch->info->var.bits_per_pixel) {
 			case 16:
-				tmp |= 0x03;
+				tmp = LDDFR_PKF_RGB16;
 				break;
 			case 24:
-				tmp |= 0x0b;
+				tmp = LDDFR_PKF_RGB24;
 				break;
 			case 32:
+			default:
+				tmp = LDDFR_PKF_ARGB32;
 				break;
 			}
 		}
+
 		lcdc_write_chan(ch, LDDFR, tmp);
+		lcdc_write_chan(ch, LDMLSR, ch->pitch);
+		lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
+		if (ch->info->var.nonstd)
+			lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
 
-		base_addr_y = ch->info->fix.smem_start;
-		base_addr_c = base_addr_y +
-				ch->info->var.xres *
-				ch->info->var.yres_virtual;
-		pitch = ch->info->fix.line_length;
+		/* When using deferred I/O mode, configure the LCDC for one-shot
+		 * operation and enable the frame end interrupt. Otherwise use
+		 * continuous read mode.
+		 */
+		if (ch->ldmt1r_value & LDMT1R_IFM &&
+		    ch->cfg.sys_bus_cfg.deferred_io_msec) {
+			lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
+			lcdc_write(priv, _LDINTR, LDINTR_FE);
+		} else {
+			lcdc_write_chan(ch, LDSM1R, 0);
+		}
+	}
 
-		/* test if we can enable meram */
-		if (ch->cfg.meram_cfg && priv->meram_dev &&
-				priv->meram_dev->ops) {
-			struct sh_mobile_meram_cfg *cfg;
-			struct sh_mobile_meram_info *mdev;
-			unsigned long icb_addr_y, icb_addr_c;
-			int icb_pitch;
-			int pf;
+	/* Word and long word swap. */
+	if  (priv->ch[0].info->var.nonstd)
+		tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
+	else {
+		switch (bpp) {
+		case 16:
+			tmp = LDDDSR_LS | LDDDSR_WS;
+			break;
+		case 24:
+			tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
+			break;
+		case 32:
+		default:
+			tmp = LDDDSR_LS;
+			break;
+		}
+	}
+	lcdc_write(priv, _LDDDSR, tmp);
 
-			cfg = ch->cfg.meram_cfg;
-			mdev = priv->meram_dev;
-			/* we need to de-init configured ICBs before we
-			 * we can re-initialize them.
-			 */
-			if (ch->meram_enabled)
-				mdev->ops->meram_unregister(mdev, cfg);
+	/* Enable the display output. */
+	lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
+	sh_mobile_lcdc_start_stop(priv, 1);
+	priv->started = 1;
+}
 
-			ch->meram_enabled = 0;
+static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
+{
+	struct sh_mobile_meram_info *mdev = priv->meram_dev;
+	struct sh_mobile_lcdc_board_cfg	*board_cfg;
+	struct sh_mobile_lcdc_chan *ch;
+	unsigned long tmp;
+	int ret;
+	int k;
 
-			if (ch->info->var.nonstd) {
-				if (ch->info->var.bits_per_pixel == 24)
-					pf = SH_MOBILE_MERAM_PF_NV24;
-				else
-					pf = SH_MOBILE_MERAM_PF_NV;
-			} else {
-				pf = SH_MOBILE_MERAM_PF_RGB;
-			}
+	/* enable clocks before accessing the hardware */
+	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
+		if (priv->ch[k].enabled)
+			sh_mobile_lcdc_clk_on(priv);
+	}
 
-			ret = mdev->ops->meram_register(mdev, cfg, pitch,
-						ch->info->var.yres,
-						pf,
-						base_addr_y,
-						base_addr_c,
-						&icb_addr_y,
-						&icb_addr_c,
-						&icb_pitch);
-			if (!ret)  {
-				/* set LDSA1R value */
-				base_addr_y = icb_addr_y;
-				pitch = icb_pitch;
-
-				/* set LDSA2R value if required */
-				if (base_addr_c)
-					base_addr_c = icb_addr_c;
-
-				ch->meram_enabled = 1;
-			}
-		}
+	/* reset */
+	lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
+	lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
 
-		/* point out our frame buffer */
-		lcdc_write_chan(ch, LDSA1R, base_addr_y);
-		if (ch->info->var.nonstd)
-			lcdc_write_chan(ch, LDSA2R, base_addr_c);
+	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
+		ch = &priv->ch[k];
 
-		/* set line size */
-		lcdc_write_chan(ch, LDMLSR, pitch);
+		if (!ch->enabled)
+			continue;
 
-		/* setup deferred io if SYS bus */
-		tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
-		if (ch->ldmt1r_value & (1 << 12) && tmp) {
-			ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
-			ch->defio.delay = msecs_to_jiffies(tmp);
-			ch->info->fbdefio = &ch->defio;
-			fb_deferred_io_init(ch->info);
+		board_cfg = &ch->cfg.board_cfg;
+		if (board_cfg->setup_sys) {
+			ret = board_cfg->setup_sys(board_cfg->board_data, ch,
+						   &sh_mobile_lcdc_sys_bus_ops);
+			if (ret)
+				return ret;
+		}
+	}
 
-			/* one-shot mode */
-			lcdc_write_chan(ch, LDSM1R, 1);
+	/* Compute frame buffer base address and pitch for each channel. */
+	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
+		struct sh_mobile_meram_cfg *cfg;
+		int pixelformat;
 
-			/* enable "Frame End Interrupt Enable" bit */
-			lcdc_write(priv, _LDINTR, LDINTR_FE);
+		ch = &priv->ch[k];
+		if (!ch->enabled)
+			continue;
 
-		} else {
-			/* continuous read mode */
-			lcdc_write_chan(ch, LDSM1R, 0);
+		ch->base_addr_y = ch->info->fix.smem_start;
+		ch->base_addr_c = ch->base_addr_y
+				+ ch->info->var.xres
+				* ch->info->var.yres_virtual;
+		ch->pitch = ch->info->fix.line_length;
+
+		/* Enable MERAM if possible. */
+		cfg = ch->cfg.meram_cfg;
+		if (mdev == NULL || mdev->ops == NULL || cfg == NULL)
+			continue;
+
+		/* we need to de-init configured ICBs before we can
+		 * re-initialize them.
+		 */
+		if (ch->meram_enabled) {
+			mdev->ops->meram_unregister(mdev, cfg);
+			ch->meram_enabled = 0;
 		}
+
+		if (!ch->info->var.nonstd)
+			pixelformat = SH_MOBILE_MERAM_PF_RGB;
+		else if (ch->info->var.bits_per_pixel == 24)
+			pixelformat = SH_MOBILE_MERAM_PF_NV24;
+		else
+			pixelformat = SH_MOBILE_MERAM_PF_NV;
+
+		ret = mdev->ops->meram_register(mdev, cfg, ch->pitch,
+					ch->info->var.yres, pixelformat,
+					ch->base_addr_y, ch->base_addr_c,
+					&ch->base_addr_y, &ch->base_addr_c,
+					&ch->pitch);
+		if (!ret)
+			ch->meram_enabled = 1;
 	}
 
-	/* display output */
-	lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
+	/* Start the LCDC. */
+	__sh_mobile_lcdc_start(priv);
 
-	/* start the lcdc */
-	sh_mobile_lcdc_start_stop(priv, 1);
-	priv->started = 1;
-
-	/* tell the board code to enable the panel */
+	/* Setup deferred I/O, tell the board code to enable the panels, and
+	 * turn backlight on.
+	 */
 	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 		ch = &priv->ch[k];
 		if (!ch->enabled)
 			continue;
 
+		tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
+		if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
+			ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
+			ch->defio.delay = msecs_to_jiffies(tmp);
+			ch->info->fbdefio = &ch->defio;
+			fb_deferred_io_init(ch->info);
+		}
+
 		board_cfg = &ch->cfg.board_cfg;
 		if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
 			board_cfg->display_on(board_cfg->board_data, ch->info);
@@ -776,42 +734,42 @@ static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
 
 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
 {
-	int ifm, miftyp;
-
-	switch (ch->cfg.interface_type) {
-	case RGB8: ifm = 0; miftyp = 0; break;
-	case RGB9: ifm = 0; miftyp = 4; break;
-	case RGB12A: ifm = 0; miftyp = 5; break;
-	case RGB12B: ifm = 0; miftyp = 6; break;
-	case RGB16: ifm = 0; miftyp = 7; break;
-	case RGB18: ifm = 0; miftyp = 10; break;
-	case RGB24: ifm = 0; miftyp = 11; break;
-	case SYS8A: ifm = 1; miftyp = 0; break;
-	case SYS8B: ifm = 1; miftyp = 1; break;
-	case SYS8C: ifm = 1; miftyp = 2; break;
-	case SYS8D: ifm = 1; miftyp = 3; break;
-	case SYS9: ifm = 1; miftyp = 4; break;
-	case SYS12: ifm = 1; miftyp = 5; break;
-	case SYS16A: ifm = 1; miftyp = 7; break;
-	case SYS16B: ifm = 1; miftyp = 8; break;
-	case SYS16C: ifm = 1; miftyp = 9; break;
-	case SYS18: ifm = 1; miftyp = 10; break;
-	case SYS24: ifm = 1; miftyp = 11; break;
-	default: goto bad;
+	int interface_type = ch->cfg.interface_type;
+
+	switch (interface_type) {
+	case RGB8:
+	case RGB9:
+	case RGB12A:
+	case RGB12B:
+	case RGB16:
+	case RGB18:
+	case RGB24:
+	case SYS8A:
+	case SYS8B:
+	case SYS8C:
+	case SYS8D:
+	case SYS9:
+	case SYS12:
+	case SYS16A:
+	case SYS16B:
+	case SYS16C:
+	case SYS18:
+	case SYS24:
+		break;
+	default:
+		return -EINVAL;
 	}
 
 	/* SUBLCD only supports SYS interface */
 	if (lcdc_chan_is_sublcd(ch)) {
-		if (ifm == 0)
-			goto bad;
-		else
-			ifm = 0;
+		if (!(interface_type & LDMT1R_IFM))
+			return -EINVAL;
+
+		interface_type &= ~LDMT1R_IFM;
 	}
 
-	ch->ldmt1r_value = (ifm << 12) | miftyp;
+	ch->ldmt1r_value = interface_type;
 	return 0;
- bad:
-	return -EINVAL;
 }
 
 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
@@ -819,18 +777,24 @@ static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
 				       struct sh_mobile_lcdc_priv *priv)
 {
 	char *str;
-	int icksel;
 
 	switch (clock_source) {
-	case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
-	case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
-	case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
+	case LCDC_CLK_BUS:
+		str = "bus_clk";
+		priv->lddckr = LDDCKR_ICKSEL_BUS;
+		break;
+	case LCDC_CLK_PERIPHERAL:
+		str = "peripheral_clk";
+		priv->lddckr = LDDCKR_ICKSEL_MIPI;
+		break;
+	case LCDC_CLK_EXTERNAL:
+		str = NULL;
+		priv->lddckr = LDDCKR_ICKSEL_HDMI;
+		break;
 	default:
 		return -EINVAL;
 	}
 
-	priv->lddckr = icksel << 16;
-
 	if (str) {
 		priv->dot_clk = clk_get(&pdev->dev, str);
 		if (IS_ERR(priv->dot_clk)) {
@@ -914,12 +878,12 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
 	unsigned long base_addr_y, base_addr_c;
 	unsigned long c_offset;
 
-	if (!var->nonstd)
-		new_pan_offset = (var->yoffset * info->fix.line_length) +
-			(var->xoffset * (info->var.bits_per_pixel / 8));
+	if (!info->var.nonstd)
+		new_pan_offset = var->yoffset * info->fix.line_length
+			       + var->xoffset * (info->var.bits_per_pixel / 8);
 	else
-		new_pan_offset = (var->yoffset * info->fix.line_length) +
-			(var->xoffset);
+		new_pan_offset = var->yoffset * info->fix.line_length
+			       + var->xoffset;
 
 	if (new_pan_offset == ch->pan_offset)
 		return 0;	/* No change, do nothing */
@@ -928,44 +892,40 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
 
 	/* Set the source address for the next refresh */
 	base_addr_y = ch->dma_handle + new_pan_offset;
-	if (var->nonstd) {
+	if (info->var.nonstd) {
 		/* Set y offset */
-		c_offset = (var->yoffset *
-			info->fix.line_length *
-			(info->var.bits_per_pixel - 8)) / 8;
-		base_addr_c = ch->dma_handle + var->xres * var->yres_virtual +
-			c_offset;
+		c_offset = var->yoffset * info->fix.line_length
+			 * (info->var.bits_per_pixel - 8) / 8;
+		base_addr_c = ch->dma_handle
+			    + info->var.xres * info->var.yres_virtual
+			    + c_offset;
 		/* Set x offset */
 		if (info->var.bits_per_pixel == 24)
 			base_addr_c += 2 * var->xoffset;
 		else
 			base_addr_c += var->xoffset;
-	} else
-		base_addr_c = 0;
+	}
 
-	if (!ch->meram_enabled) {
-		lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
-		if (base_addr_c)
-			lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
-	} else {
+	if (ch->meram_enabled) {
 		struct sh_mobile_meram_cfg *cfg;
 		struct sh_mobile_meram_info *mdev;
-		unsigned long icb_addr_y, icb_addr_c;
 		int ret;
 
 		cfg = ch->cfg.meram_cfg;
 		mdev = priv->meram_dev;
 		ret = mdev->ops->meram_update(mdev, cfg,
 					base_addr_y, base_addr_c,
-					&icb_addr_y, &icb_addr_c);
+					&base_addr_y, &base_addr_c);
 		if (ret)
 			return ret;
+	}
 
-		lcdc_write_chan_mirror(ch, LDSA1R, icb_addr_y);
-		if (icb_addr_c)
-			lcdc_write_chan_mirror(ch, LDSA2R, icb_addr_c);
+	ch->base_addr_y = base_addr_y;
+	ch->base_addr_c = base_addr_c;
 
-	}
+	lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
+	if (info->var.nonstd)
+		lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
 
 	if (lcdc_chan_is_sublcd(ch))
 		lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
@@ -985,9 +945,11 @@ static int sh_mobile_wait_for_vsync(struct fb_info *info)
 	unsigned long ldintr;
 	int ret;
 
-	/* Enable VSync End interrupt */
+	/* Enable VSync End interrupt and be careful not to acknowledge any
+	 * pending interrupt.
+	 */
 	ldintr = lcdc_read(ch->lcdc, _LDINTR);
-	ldintr |= LDINTR_VEE;
+	ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 	lcdc_write(ch->lcdc, _LDINTR, ldintr);
 
 	ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
@@ -1037,11 +999,6 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
 		/* Couldn't reconfigure, hopefully, can continue as before */
 		return;
 
-	if (info->var.nonstd)
-		info->fix.line_length = mode1.xres;
-	else
-		info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
-
 	/*
 	 * fb_set_var() calls the notifier change internally, only if
 	 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
@@ -1094,30 +1051,126 @@ static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *in
 {
 	struct sh_mobile_lcdc_chan *ch = info->par;
 	struct sh_mobile_lcdc_priv *p = ch->lcdc;
+	unsigned int best_dist = (unsigned int)-1;
+	unsigned int best_xres = 0;
+	unsigned int best_yres = 0;
+	unsigned int i;
 
-	if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
-	    var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
-		dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
-			 var->left_margin, var->xres, var->right_margin, var->hsync_len,
-			 var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
-			 PICOS2KHZ(var->pixclock));
+	if (var->xres > MAX_XRES || var->yres > MAX_YRES)
 		return -EINVAL;
+
+	/* If board code provides us with a list of available modes, make sure
+	 * we use one of them. Find the mode closest to the requested one. The
+	 * distance between two modes is defined as the size of the
+	 * non-overlapping parts of the two rectangles.
+	 */
+	for (i = 0; i < ch->cfg.num_cfg; ++i) {
+		const struct fb_videomode *mode = &ch->cfg.lcd_cfg[i];
+		unsigned int dist;
+
+		/* We can only round up. */
+		if (var->xres > mode->xres || var->yres > mode->yres)
+			continue;
+
+		dist = var->xres * var->yres + mode->xres * mode->yres
+		     - 2 * min(var->xres, mode->xres)
+			 * min(var->yres, mode->yres);
+
+		if (dist < best_dist) {
+			best_xres = mode->xres;
+			best_yres = mode->yres;
+			best_dist = dist;
+		}
+	}
+
+	/* If no available mode can be used, return an error. */
+	if (ch->cfg.num_cfg != 0) {
+		if (best_dist == (unsigned int)-1)
+			return -EINVAL;
+
+		var->xres = best_xres;
+		var->yres = best_yres;
 	}
 
+	/* Make sure the virtual resolution is at least as big as the visible
+	 * resolution.
+	 */
+	if (var->xres_virtual < var->xres)
+		var->xres_virtual = var->xres;
+	if (var->yres_virtual < var->yres)
+		var->yres_virtual = var->yres;
+
+	if (var->bits_per_pixel <= 16) {		/* RGB 565 */
+		var->bits_per_pixel = 16;
+		var->red.offset = 11;
+		var->red.length = 5;
+		var->green.offset = 5;
+		var->green.length = 6;
+		var->blue.offset = 0;
+		var->blue.length = 5;
+		var->transp.offset = 0;
+		var->transp.length = 0;
+	} else if (var->bits_per_pixel <= 24) {		/* RGB 888 */
+		var->bits_per_pixel = 24;
+		var->red.offset = 16;
+		var->red.length = 8;
+		var->green.offset = 8;
+		var->green.length = 8;
+		var->blue.offset = 0;
+		var->blue.length = 8;
+		var->transp.offset = 0;
+		var->transp.length = 0;
+	} else if (var->bits_per_pixel <= 32) {		/* RGBA 888 */
+		var->bits_per_pixel = 32;
+		var->red.offset = 16;
+		var->red.length = 8;
+		var->green.offset = 8;
+		var->green.length = 8;
+		var->blue.offset = 0;
+		var->blue.length = 8;
+		var->transp.offset = 24;
+		var->transp.length = 8;
+	} else
+		return -EINVAL;
+
+	var->red.msb_right = 0;
+	var->green.msb_right = 0;
+	var->blue.msb_right = 0;
+	var->transp.msb_right = 0;
+
+	/* Make sure we don't exceed our allocated memory. */
+	if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
+	    info->fix.smem_len)
+		return -EINVAL;
+
 	/* only accept the forced_bpp for dual channel configurations */
 	if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
 		return -EINVAL;
 
-	switch (var->bits_per_pixel) {
-	case 16: /* PKF[4:0] = 00011 - RGB 565 */
-	case 24: /* PKF[4:0] = 01011 - RGB 888 */
-	case 32: /* PKF[4:0] = 00000 - RGBA 888 */
-		break;
-	default:
-		return -EINVAL;
+	return 0;
+}
+
+static int sh_mobile_set_par(struct fb_info *info)
+{
+	struct sh_mobile_lcdc_chan *ch = info->par;
+	u32 line_length = info->fix.line_length;
+	int ret;
+
+	sh_mobile_lcdc_stop(ch->lcdc);
+
+	if (info->var.nonstd)
+		info->fix.line_length = info->var.xres;
+	else
+		info->fix.line_length = info->var.xres
+				      * info->var.bits_per_pixel / 8;
+
+	ret = sh_mobile_lcdc_start(ch->lcdc);
+	if (ret < 0) {
+		dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
+		info->fix.line_length = line_length;
 	}
 
-	return 0;
+	return ret;
 }
 
 /*
@@ -1177,6 +1230,7 @@ static struct fb_ops sh_mobile_lcdc_ops = {
 	.fb_open	= sh_mobile_open,
 	.fb_release	= sh_mobile_release,
 	.fb_check_var	= sh_mobile_check_var,
+	.fb_set_par	= sh_mobile_set_par,
 };
 
 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
@@ -1238,66 +1292,6 @@ static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
 	backlight_device_unregister(bdev);
 }
 
-static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp,
-				   int nonstd)
-{
-	if (nonstd) {
-		switch (bpp) {
-		case 12:
-		case 16:
-		case 24:
-			var->bits_per_pixel = bpp;
-			var->nonstd = nonstd;
-			return 0;
-		default:
-			return -EINVAL;
-		}
-	}
-
-	switch (bpp) {
-	case 16: /* PKF[4:0] = 00011 - RGB 565 */
-		var->red.offset = 11;
-		var->red.length = 5;
-		var->green.offset = 5;
-		var->green.length = 6;
-		var->blue.offset = 0;
-		var->blue.length = 5;
-		var->transp.offset = 0;
-		var->transp.length = 0;
-		break;
-
-	case 24: /* PKF[4:0] = 01011 - RGB 888 */
-		var->red.offset = 16;
-		var->red.length = 8;
-		var->green.offset = 8;
-		var->green.length = 8;
-		var->blue.offset = 0;
-		var->blue.length = 8;
-		var->transp.offset = 0;
-		var->transp.length = 0;
-		break;
-
-	case 32: /* PKF[4:0] = 00000 - RGBA 888 */
-		var->red.offset = 16;
-		var->red.length = 8;
-		var->green.offset = 8;
-		var->green.length = 8;
-		var->blue.offset = 0;
-		var->blue.length = 8;
-		var->transp.offset = 24;
-		var->transp.length = 8;
-		break;
-	default:
-		return -EINVAL;
-	}
-	var->bits_per_pixel = bpp;
-	var->red.msb_right = 0;
-	var->green.msb_right = 0;
-	var->blue.msb_right = 0;
-	var->transp.msb_right = 0;
-	return 0;
-}
-
 static int sh_mobile_lcdc_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -1316,47 +1310,20 @@ static int sh_mobile_lcdc_resume(struct device *dev)
 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
-	struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
-	struct sh_mobile_lcdc_chan *ch;
-	int k, n;
-
-	/* save per-channel registers */
-	for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
-		ch = &p->ch[k];
-		if (!ch->enabled)
-			continue;
-		for (n = 0; n < NR_CH_REGS; n++)
-			ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
-	}
-
-	/* save shared registers */
-	for (n = 0; n < NR_SHARED_REGS; n++)
-		p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
+	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
 
 	/* turn off LCDC hardware */
-	lcdc_write(p, _LDCNT1R, 0);
+	lcdc_write(priv, _LDCNT1R, 0);
+
 	return 0;
 }
 
 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
-	struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
-	struct sh_mobile_lcdc_chan *ch;
-	int k, n;
-
-	/* restore per-channel registers */
-	for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
-		ch = &p->ch[k];
-		if (!ch->enabled)
-			continue;
-		for (n = 0; n < NR_CH_REGS; n++)
-			lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
-	}
+	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
 
-	/* restore shared registers */
-	for (n = 0; n < NR_SHARED_REGS; n++)
-		lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
+	__sh_mobile_lcdc_start(priv);
 
 	return 0;
 }
@@ -1408,17 +1375,187 @@ static int sh_mobile_lcdc_notify(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-static int sh_mobile_lcdc_remove(struct platform_device *pdev);
+static int sh_mobile_lcdc_remove(struct platform_device *pdev)
+{
+	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
+	struct fb_info *info;
+	int i;
 
-static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
+	fb_unregister_client(&priv->notifier);
+
+	for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
+		if (priv->ch[i].info && priv->ch[i].info->dev)
+			unregister_framebuffer(priv->ch[i].info);
+
+	sh_mobile_lcdc_stop(priv);
+
+	for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
+		info = priv->ch[i].info;
+
+		if (!info || !info->device)
+			continue;
+
+		if (priv->ch[i].sglist)
+			vfree(priv->ch[i].sglist);
+
+		if (info->screen_base)
+			dma_free_coherent(&pdev->dev, info->fix.smem_len,
+					  info->screen_base,
+					  priv->ch[i].dma_handle);
+		fb_dealloc_cmap(&info->cmap);
+		framebuffer_release(info);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
+		if (priv->ch[i].bl)
+			sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
+	}
+
+	if (priv->dot_clk)
+		clk_put(priv->dot_clk);
+
+	if (priv->dev)
+		pm_runtime_disable(priv->dev);
+
+	if (priv->base)
+		iounmap(priv->base);
+
+	if (priv->irq)
+		free_irq(priv->irq, priv);
+	kfree(priv);
+	return 0;
+}
+
+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;
+
+	mutex_init(&ch->open_lock);
+
+	/* Allocate the frame buffer device. */
+	ch->info = framebuffer_alloc(0, dev);
+	if (!ch->info) {
+		dev_err(dev, "unable to allocate fb_info\n");
+		return -ENOMEM;
+	}
+
+	info = ch->info;
+	info->fbops = &sh_mobile_lcdc_ops;
+	info->par = ch;
+	info->pseudo_palette = &ch->pseudo_palette;
+	info->flags = FBINFO_FLAG_DEFAULT;
+
+	/* 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);
+
+	/* Initialize fixed screen information. Restrict pan to 2 lines steps
+	 * for NV12.
+	 */
+	info->fix = sh_mobile_lcdc_fix;
+	info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
+	if (cfg->nonstd && cfg->bpp == 12)
+		info->fix.ypanstep = 2;
+
+	/* Create the mode list. */
+	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);
+
+	/* Initialize variable screen information using the first mode as
+	 * default. The default Y virtual resolution is twice the panel size to
+	 * allow for double-buffering.
+	 */
+	var = &info->var;
+	fb_videomode_to_var(var, mode);
+	var->bits_per_pixel = cfg->bpp;
+	var->width = cfg->lcd_size_cfg.width;
+	var->height = cfg->lcd_size_cfg.height;
+	var->yres_virtual = var->yres * 2;
+	var->activate = FB_ACTIVATE_NOW;
+
+	ret = sh_mobile_check_var(var, info);
+	if (ret)
+		return ret;
+
+	/* Allocate frame buffer memory and color map. */
+	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;
+	}
+
+	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");
@@ -1440,7 +1577,7 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, priv);
 
-	error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
+	error = request_irq(i, sh_mobile_lcdc_irq, 0,
 			    dev_name(&pdev->dev), priv);
 	if (error) {
 		dev_err(&pdev->dev, "unable to request irq\n");
@@ -1450,9 +1587,8 @@ 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]));
@@ -1472,26 +1608,26 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
 
 		switch (pdata->ch[i].chan) {
 		case LCDC_CHAN_MAINLCD:
-			ch->enabled = 1 << 1;
+			ch->enabled = LDCNT2R_ME;
 			ch->reg_offs = lcdc_offs_mainlcd;
-			j++;
+			num_channels++;
 			break;
 		case LCDC_CHAN_SUBLCD:
-			ch->enabled = 1 << 2;
+			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));
@@ -1506,125 +1642,23 @@ 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);
+		error = sh_mobile_lcdc_channel_init(ch, &pdev->dev);
 		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;
+			goto err1;
 	}
 
-	if (error)
-		goto err1;
-
 	error = sh_mobile_lcdc_start(priv);
 	if (error) {
 		dev_err(&pdev->dev, "unable to start hardware\n");
 		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) *
@@ -1665,57 +1699,6 @@ err1:
 	return error;
 }
 
-static int sh_mobile_lcdc_remove(struct platform_device *pdev)
-{
-	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
-	struct fb_info *info;
-	int i;
-
-	fb_unregister_client(&priv->notifier);
-
-	for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
-		if (priv->ch[i].info && priv->ch[i].info->dev)
-			unregister_framebuffer(priv->ch[i].info);
-
-	sh_mobile_lcdc_stop(priv);
-
-	for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
-		info = priv->ch[i].info;
-
-		if (!info || !info->device)
-			continue;
-
-		if (priv->ch[i].sglist)
-			vfree(priv->ch[i].sglist);
-
-		if (info->screen_base)
-			dma_free_coherent(&pdev->dev, info->fix.smem_len,
-					  info->screen_base,
-					  priv->ch[i].dma_handle);
-		fb_dealloc_cmap(&info->cmap);
-		framebuffer_release(info);
-	}
-
-	for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
-		if (priv->ch[i].bl)
-			sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
-	}
-
-	if (priv->dot_clk)
-		clk_put(priv->dot_clk);
-
-	if (priv->dev)
-		pm_runtime_disable(priv->dev);
-
-	if (priv->base)
-		iounmap(priv->base);
-
-	if (priv->irq)
-		free_irq(priv->irq, priv);
-	kfree(priv);
-	return 0;
-}
-
 static struct platform_driver sh_mobile_lcdc_driver = {
 	.driver		= {
 		.name		= "sh_mobile_lcdc_fb",