video: move fbdev to drivers/video/fbdev

The drivers/video directory is a mess. It contains generic video related
files, directories for backlight, console, linux logo, lots of fbdev
device drivers, fbdev framework files.

Make some order into the chaos by creating drivers/video/fbdev
directory, and move all fbdev related files there.

No functionality is changed, although I guess it is possible that some
subtle Makefile build order related issue could be created by this
patch.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 2121 insertions, 0 deletions

diff --git a/drivers/video/fbdev/intelfb/intelfbhw.c b/drivers/video/fbdev/intelfb/intelfbhw.c
new file mode 100644
index 000000000000..fbad61da359f
--- /dev/null
+++ b/drivers/video/fbdev/intelfb/intelfbhw.c
@@ -0,0 +1,2121 @@
+/*
+ * intelfb
+ *
+ * Linux framebuffer driver for Intel(R) 865G integrated graphics chips.
+ *
+ * Copyright © 2002, 2003 David Dawes <dawes@xfree86.org>
+ *                   2004 Sylvain Meyer
+ *
+ * This driver consists of two parts.  The first part (intelfbdrv.c) provides
+ * the basic fbdev interfaces, is derived in part from the radeonfb and
+ * vesafb drivers, and is covered by the GPL.  The second part (intelfbhw.c)
+ * provides the code to program the hardware.  Most of it is derived from
+ * the i810/i830 XFree86 driver.  The HW-specific code is covered here
+ * under a dual license (GPL and MIT/XFree86 license).
+ *
+ * Author: David Dawes
+ *
+ */
+
+/* $DHD: intelfb/intelfbhw.c,v 1.9 2003/06/27 15:06:25 dawes Exp $ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+#include <linux/pagemap.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+
+#include "intelfb.h"
+#include "intelfbhw.h"
+
+struct pll_min_max {
+	int min_m, max_m, min_m1, max_m1;
+	int min_m2, max_m2, min_n, max_n;
+	int min_p, max_p, min_p1, max_p1;
+	int min_vco, max_vco, p_transition_clk, ref_clk;
+	int p_inc_lo, p_inc_hi;
+};
+
+#define PLLS_I8xx 0
+#define PLLS_I9xx 1
+#define PLLS_MAX 2
+
+static struct pll_min_max plls[PLLS_MAX] = {
+	{ 108, 140, 18, 26,
+	  6, 16, 3, 16,
+	  4, 128, 0, 31,
+	  930000, 1400000, 165000, 48000,
+	  4, 2 },		/* I8xx */
+
+	{ 75, 120, 10, 20,
+	  5, 9, 4, 7,
+	  5, 80, 1, 8,
+	  1400000, 2800000, 200000, 96000,
+	  10, 5 }		/* I9xx */
+};
+
+int intelfbhw_get_chipset(struct pci_dev *pdev, struct intelfb_info *dinfo)
+{
+	u32 tmp;
+	if (!pdev || !dinfo)
+		return 1;
+
+	switch (pdev->device) {
+	case PCI_DEVICE_ID_INTEL_830M:
+		dinfo->name = "Intel(R) 830M";
+		dinfo->chipset = INTEL_830M;
+		dinfo->mobile = 1;
+		dinfo->pll_index = PLLS_I8xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_845G:
+		dinfo->name = "Intel(R) 845G";
+		dinfo->chipset = INTEL_845G;
+		dinfo->mobile = 0;
+		dinfo->pll_index = PLLS_I8xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_854:
+		dinfo->mobile = 1;
+		dinfo->name = "Intel(R) 854";
+		dinfo->chipset = INTEL_854;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_85XGM:
+		tmp = 0;
+		dinfo->mobile = 1;
+		dinfo->pll_index = PLLS_I8xx;
+		pci_read_config_dword(pdev, INTEL_85X_CAPID, &tmp);
+		switch ((tmp >> INTEL_85X_VARIANT_SHIFT) &
+			INTEL_85X_VARIANT_MASK) {
+		case INTEL_VAR_855GME:
+			dinfo->name = "Intel(R) 855GME";
+			dinfo->chipset = INTEL_855GME;
+			return 0;
+		case INTEL_VAR_855GM:
+			dinfo->name = "Intel(R) 855GM";
+			dinfo->chipset = INTEL_855GM;
+			return 0;
+		case INTEL_VAR_852GME:
+			dinfo->name = "Intel(R) 852GME";
+			dinfo->chipset = INTEL_852GME;
+			return 0;
+		case INTEL_VAR_852GM:
+			dinfo->name = "Intel(R) 852GM";
+			dinfo->chipset = INTEL_852GM;
+			return 0;
+		default:
+			dinfo->name = "Intel(R) 852GM/855GM";
+			dinfo->chipset = INTEL_85XGM;
+			return 0;
+		}
+		break;
+	case PCI_DEVICE_ID_INTEL_865G:
+		dinfo->name = "Intel(R) 865G";
+		dinfo->chipset = INTEL_865G;
+		dinfo->mobile = 0;
+		dinfo->pll_index = PLLS_I8xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_915G:
+		dinfo->name = "Intel(R) 915G";
+		dinfo->chipset = INTEL_915G;
+		dinfo->mobile = 0;
+		dinfo->pll_index = PLLS_I9xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_915GM:
+		dinfo->name = "Intel(R) 915GM";
+		dinfo->chipset = INTEL_915GM;
+		dinfo->mobile = 1;
+		dinfo->pll_index = PLLS_I9xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_945G:
+		dinfo->name = "Intel(R) 945G";
+		dinfo->chipset = INTEL_945G;
+		dinfo->mobile = 0;
+		dinfo->pll_index = PLLS_I9xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_945GM:
+		dinfo->name = "Intel(R) 945GM";
+		dinfo->chipset = INTEL_945GM;
+		dinfo->mobile = 1;
+		dinfo->pll_index = PLLS_I9xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_945GME:
+		dinfo->name = "Intel(R) 945GME";
+		dinfo->chipset = INTEL_945GME;
+		dinfo->mobile = 1;
+		dinfo->pll_index = PLLS_I9xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_965G:
+		dinfo->name = "Intel(R) 965G";
+		dinfo->chipset = INTEL_965G;
+		dinfo->mobile = 0;
+		dinfo->pll_index = PLLS_I9xx;
+		return 0;
+	case PCI_DEVICE_ID_INTEL_965GM:
+		dinfo->name = "Intel(R) 965GM";
+		dinfo->chipset = INTEL_965GM;
+		dinfo->mobile = 1;
+		dinfo->pll_index = PLLS_I9xx;
+		return 0;
+	default:
+		return 1;
+	}
+}
+
+int intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size,
+			 int *stolen_size)
+{
+	struct pci_dev *bridge_dev;
+	u16 tmp;
+	int stolen_overhead;
+
+	if (!pdev || !aperture_size || !stolen_size)
+		return 1;
+
+	/* Find the bridge device.  It is always 0:0.0 */
+	if (!(bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0)))) {
+		ERR_MSG("cannot find bridge device\n");
+		return 1;
+	}
+
+	/* Get the fb aperture size and "stolen" memory amount. */
+	tmp = 0;
+	pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp);
+	pci_dev_put(bridge_dev);
+
+	switch (pdev->device) {
+	case PCI_DEVICE_ID_INTEL_915G:
+	case PCI_DEVICE_ID_INTEL_915GM:
+	case PCI_DEVICE_ID_INTEL_945G:
+	case PCI_DEVICE_ID_INTEL_945GM:
+	case PCI_DEVICE_ID_INTEL_945GME:
+	case PCI_DEVICE_ID_INTEL_965G:
+	case PCI_DEVICE_ID_INTEL_965GM:
+		/* 915, 945 and 965 chipsets support a 256MB aperture.
+		   Aperture size is determined by inspected the
+		   base address of the aperture. */
+		if (pci_resource_start(pdev, 2) & 0x08000000)
+			*aperture_size = MB(128);
+		else
+			*aperture_size = MB(256);
+		break;
+	default:
+		if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
+			*aperture_size = MB(64);
+		else
+			*aperture_size = MB(128);
+		break;
+	}
+
+	/* Stolen memory size is reduced by the GTT and the popup.
+	   GTT is 1K per MB of aperture size, and popup is 4K. */
+	stolen_overhead = (*aperture_size / MB(1)) + 4;
+	switch(pdev->device) {
+	case PCI_DEVICE_ID_INTEL_830M:
+	case PCI_DEVICE_ID_INTEL_845G:
+		switch (tmp & INTEL_830_GMCH_GMS_MASK) {
+		case INTEL_830_GMCH_GMS_STOLEN_512:
+			*stolen_size = KB(512) - KB(stolen_overhead);
+			return 0;
+		case INTEL_830_GMCH_GMS_STOLEN_1024:
+			*stolen_size = MB(1) - KB(stolen_overhead);
+			return 0;
+		case INTEL_830_GMCH_GMS_STOLEN_8192:
+			*stolen_size = MB(8) - KB(stolen_overhead);
+			return 0;
+		case INTEL_830_GMCH_GMS_LOCAL:
+			ERR_MSG("only local memory found\n");
+			return 1;
+		case INTEL_830_GMCH_GMS_DISABLED:
+			ERR_MSG("video memory is disabled\n");
+			return 1;
+		default:
+			ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
+				tmp & INTEL_830_GMCH_GMS_MASK);
+			return 1;
+		}
+		break;
+	default:
+		switch (tmp & INTEL_855_GMCH_GMS_MASK) {
+		case INTEL_855_GMCH_GMS_STOLEN_1M:
+			*stolen_size = MB(1) - KB(stolen_overhead);
+			return 0;
+		case INTEL_855_GMCH_GMS_STOLEN_4M:
+			*stolen_size = MB(4) - KB(stolen_overhead);
+			return 0;
+		case INTEL_855_GMCH_GMS_STOLEN_8M:
+			*stolen_size = MB(8) - KB(stolen_overhead);
+			return 0;
+		case INTEL_855_GMCH_GMS_STOLEN_16M:
+			*stolen_size = MB(16) - KB(stolen_overhead);
+			return 0;
+		case INTEL_855_GMCH_GMS_STOLEN_32M:
+			*stolen_size = MB(32) - KB(stolen_overhead);
+			return 0;
+		case INTEL_915G_GMCH_GMS_STOLEN_48M:
+			*stolen_size = MB(48) - KB(stolen_overhead);
+			return 0;
+		case INTEL_915G_GMCH_GMS_STOLEN_64M:
+			*stolen_size = MB(64) - KB(stolen_overhead);
+			return 0;
+		case INTEL_855_GMCH_GMS_DISABLED:
+			ERR_MSG("video memory is disabled\n");
+			return 0;
+		default:
+			ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
+				tmp & INTEL_855_GMCH_GMS_MASK);
+			return 1;
+		}
+	}
+}
+
+int intelfbhw_check_non_crt(struct intelfb_info *dinfo)
+{
+	int dvo = 0;
+
+	if (INREG(LVDS) & PORT_ENABLE)
+		dvo |= LVDS_PORT;
+	if (INREG(DVOA) & PORT_ENABLE)
+		dvo |= DVOA_PORT;
+	if (INREG(DVOB) & PORT_ENABLE)
+		dvo |= DVOB_PORT;
+	if (INREG(DVOC) & PORT_ENABLE)
+		dvo |= DVOC_PORT;
+
+	return dvo;
+}
+
+const char * intelfbhw_dvo_to_string(int dvo)
+{
+	if (dvo & DVOA_PORT)
+		return "DVO port A";
+	else if (dvo & DVOB_PORT)
+		return "DVO port B";
+	else if (dvo & DVOC_PORT)
+		return "DVO port C";
+	else if (dvo & LVDS_PORT)
+		return "LVDS port";
+	else
+		return NULL;
+}
+
+
+int intelfbhw_validate_mode(struct intelfb_info *dinfo,
+			    struct fb_var_screeninfo *var)
+{
+	int bytes_per_pixel;
+	int tmp;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_validate_mode\n");
+#endif
+
+	bytes_per_pixel = var->bits_per_pixel / 8;
+	if (bytes_per_pixel == 3)
+		bytes_per_pixel = 4;
+
+	/* Check if enough video memory. */
+	tmp = var->yres_virtual * var->xres_virtual * bytes_per_pixel;
+	if (tmp > dinfo->fb.size) {
+		WRN_MSG("Not enough video ram for mode "
+			"(%d KByte vs %d KByte).\n",
+			BtoKB(tmp), BtoKB(dinfo->fb.size));
+		return 1;
+	}
+
+	/* Check if x/y limits are OK. */
+	if (var->xres - 1 > HACTIVE_MASK) {
+		WRN_MSG("X resolution too large (%d vs %d).\n",
+			var->xres, HACTIVE_MASK + 1);
+		return 1;
+	}
+	if (var->yres - 1 > VACTIVE_MASK) {
+		WRN_MSG("Y resolution too large (%d vs %d).\n",
+			var->yres, VACTIVE_MASK + 1);
+		return 1;
+	}
+	if (var->xres < 4) {
+		WRN_MSG("X resolution too small (%d vs 4).\n", var->xres);
+		return 1;
+	}
+	if (var->yres < 4) {
+		WRN_MSG("Y resolution too small (%d vs 4).\n", var->yres);
+		return 1;
+	}
+
+	/* Check for doublescan modes. */
+	if (var->vmode & FB_VMODE_DOUBLE) {
+		WRN_MSG("Mode is double-scan.\n");
+		return 1;
+	}
+
+	if ((var->vmode & FB_VMODE_INTERLACED) && (var->yres & 1)) {
+		WRN_MSG("Odd number of lines in interlaced mode\n");
+		return 1;
+	}
+
+	/* Check if clock is OK. */
+	tmp = 1000000000 / var->pixclock;
+	if (tmp < MIN_CLOCK) {
+		WRN_MSG("Pixel clock is too low (%d MHz vs %d MHz).\n",
+			(tmp + 500) / 1000, MIN_CLOCK / 1000);
+		return 1;
+	}
+	if (tmp > MAX_CLOCK) {
+		WRN_MSG("Pixel clock is too high (%d MHz vs %d MHz).\n",
+			(tmp + 500) / 1000, MAX_CLOCK / 1000);
+		return 1;
+	}
+
+	return 0;
+}
+
+int intelfbhw_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct intelfb_info *dinfo = GET_DINFO(info);
+	u32 offset, xoffset, yoffset;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_pan_display\n");
+#endif
+
+	xoffset = ROUND_DOWN_TO(var->xoffset, 8);
+	yoffset = var->yoffset;
+
+	if ((xoffset + info->var.xres > info->var.xres_virtual) ||
+	    (yoffset + info->var.yres > info->var.yres_virtual))
+		return -EINVAL;
+
+	offset = (yoffset * dinfo->pitch) +
+		 (xoffset * info->var.bits_per_pixel) / 8;
+
+	offset += dinfo->fb.offset << 12;
+
+	dinfo->vsync.pan_offset = offset;
+	if ((var->activate & FB_ACTIVATE_VBL) &&
+	    !intelfbhw_enable_irq(dinfo))
+		dinfo->vsync.pan_display = 1;
+	else {
+		dinfo->vsync.pan_display = 0;
+		OUTREG(DSPABASE, offset);
+	}
+
+	return 0;
+}
+
+/* Blank the screen. */
+void intelfbhw_do_blank(int blank, struct fb_info *info)
+{
+	struct intelfb_info *dinfo = GET_DINFO(info);
+	u32 tmp;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_do_blank: blank is %d\n", blank);
+#endif
+
+	/* Turn plane A on or off */
+	tmp = INREG(DSPACNTR);
+	if (blank)
+		tmp &= ~DISPPLANE_PLANE_ENABLE;
+	else
+		tmp |= DISPPLANE_PLANE_ENABLE;
+	OUTREG(DSPACNTR, tmp);
+	/* Flush */
+	tmp = INREG(DSPABASE);
+	OUTREG(DSPABASE, tmp);
+
+	/* Turn off/on the HW cursor */
+#if VERBOSE > 0
+	DBG_MSG("cursor_on is %d\n", dinfo->cursor_on);
+#endif
+	if (dinfo->cursor_on) {
+		if (blank)
+			intelfbhw_cursor_hide(dinfo);
+		else
+			intelfbhw_cursor_show(dinfo);
+		dinfo->cursor_on = 1;
+	}
+	dinfo->cursor_blanked = blank;
+
+	/* Set DPMS level */
+	tmp = INREG(ADPA) & ~ADPA_DPMS_CONTROL_MASK;
+	switch (blank) {
+	case FB_BLANK_UNBLANK:
+	case FB_BLANK_NORMAL:
+		tmp |= ADPA_DPMS_D0;
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:
+		tmp |= ADPA_DPMS_D1;
+		break;
+	case FB_BLANK_HSYNC_SUSPEND:
+		tmp |= ADPA_DPMS_D2;
+		break;
+	case FB_BLANK_POWERDOWN:
+		tmp |= ADPA_DPMS_D3;
+		break;
+	}
+	OUTREG(ADPA, tmp);
+
+	return;
+}
+
+
+/* Check which pipe is connected to an active display plane. */
+int intelfbhw_active_pipe(const struct intelfb_hwstate *hw)
+{
+	int pipe = -1;
+
+	/* keep old default behaviour - prefer PIPE_A */
+	if (hw->disp_b_ctrl & DISPPLANE_PLANE_ENABLE) {
+		pipe = (hw->disp_b_ctrl >> DISPPLANE_SEL_PIPE_SHIFT);
+		pipe &= PIPE_MASK;
+		if (unlikely(pipe == PIPE_A))
+			return PIPE_A;
+	}
+	if (hw->disp_a_ctrl & DISPPLANE_PLANE_ENABLE) {
+		pipe = (hw->disp_a_ctrl >> DISPPLANE_SEL_PIPE_SHIFT);
+		pipe &= PIPE_MASK;
+		if (likely(pipe == PIPE_A))
+			return PIPE_A;
+	}
+	/* Impossible that no pipe is selected - return PIPE_A */
+	WARN_ON(pipe == -1);
+	if (unlikely(pipe == -1))
+		pipe = PIPE_A;
+
+	return pipe;
+}
+
+void intelfbhw_setcolreg(struct intelfb_info *dinfo, unsigned regno,
+			 unsigned red, unsigned green, unsigned blue,
+			 unsigned transp)
+{
+	u32 palette_reg = (dinfo->pipe == PIPE_A) ?
+			  PALETTE_A : PALETTE_B;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_setcolreg: %d: (%d, %d, %d)\n",
+		regno, red, green, blue);
+#endif
+
+	OUTREG(palette_reg + (regno << 2),
+	       (red << PALETTE_8_RED_SHIFT) |
+	       (green << PALETTE_8_GREEN_SHIFT) |
+	       (blue << PALETTE_8_BLUE_SHIFT));
+}
+
+
+int intelfbhw_read_hw_state(struct intelfb_info *dinfo,
+			    struct intelfb_hwstate *hw, int flag)
+{
+	int i;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_read_hw_state\n");
+#endif
+
+	if (!hw || !dinfo)
+		return -1;
+
+	/* Read in as much of the HW state as possible. */
+	hw->vga0_divisor = INREG(VGA0_DIVISOR);
+	hw->vga1_divisor = INREG(VGA1_DIVISOR);
+	hw->vga_pd = INREG(VGAPD);
+	hw->dpll_a = INREG(DPLL_A);
+	hw->dpll_b = INREG(DPLL_B);
+	hw->fpa0 = INREG(FPA0);
+	hw->fpa1 = INREG(FPA1);
+	hw->fpb0 = INREG(FPB0);
+	hw->fpb1 = INREG(FPB1);
+
+	if (flag == 1)
+		return flag;
+
+#if 0
+	/* This seems to be a problem with the 852GM/855GM */
+	for (i = 0; i < PALETTE_8_ENTRIES; i++) {
+		hw->palette_a[i] = INREG(PALETTE_A + (i << 2));
+		hw->palette_b[i] = INREG(PALETTE_B + (i << 2));
+	}
+#endif
+
+	if (flag == 2)
+		return flag;
+
+	hw->htotal_a = INREG(HTOTAL_A);
+	hw->hblank_a = INREG(HBLANK_A);
+	hw->hsync_a = INREG(HSYNC_A);
+	hw->vtotal_a = INREG(VTOTAL_A);
+	hw->vblank_a = INREG(VBLANK_A);
+	hw->vsync_a = INREG(VSYNC_A);
+	hw->src_size_a = INREG(SRC_SIZE_A);
+	hw->bclrpat_a = INREG(BCLRPAT_A);
+	hw->htotal_b = INREG(HTOTAL_B);
+	hw->hblank_b = INREG(HBLANK_B);
+	hw->hsync_b = INREG(HSYNC_B);
+	hw->vtotal_b = INREG(VTOTAL_B);
+	hw->vblank_b = INREG(VBLANK_B);
+	hw->vsync_b = INREG(VSYNC_B);
+	hw->src_size_b = INREG(SRC_SIZE_B);
+	hw->bclrpat_b = INREG(BCLRPAT_B);
+
+	if (flag == 3)
+		return flag;
+
+	hw->adpa = INREG(ADPA);
+	hw->dvoa = INREG(DVOA);
+	hw->dvob = INREG(DVOB);
+	hw->dvoc = INREG(DVOC);
+	hw->dvoa_srcdim = INREG(DVOA_SRCDIM);
+	hw->dvob_srcdim = INREG(DVOB_SRCDIM);
+	hw->dvoc_srcdim = INREG(DVOC_SRCDIM);
+	hw->lvds = INREG(LVDS);
+
+	if (flag == 4)
+		return flag;
+
+	hw->pipe_a_conf = INREG(PIPEACONF);
+	hw->pipe_b_conf = INREG(PIPEBCONF);
+	hw->disp_arb = INREG(DISPARB);
+
+	if (flag == 5)
+		return flag;
+
+	hw->cursor_a_control = INREG(CURSOR_A_CONTROL);
+	hw->cursor_b_control = INREG(CURSOR_B_CONTROL);
+	hw->cursor_a_base = INREG(CURSOR_A_BASEADDR);
+	hw->cursor_b_base = INREG(CURSOR_B_BASEADDR);
+
+	if (flag == 6)
+		return flag;
+
+	for (i = 0; i < 4; i++) {
+		hw->cursor_a_palette[i] = INREG(CURSOR_A_PALETTE0 + (i << 2));
+		hw->cursor_b_palette[i] = INREG(CURSOR_B_PALETTE0 + (i << 2));
+	}
+
+	if (flag == 7)
+		return flag;
+
+	hw->cursor_size = INREG(CURSOR_SIZE);
+
+	if (flag == 8)
+		return flag;
+
+	hw->disp_a_ctrl = INREG(DSPACNTR);
+	hw->disp_b_ctrl = INREG(DSPBCNTR);
+	hw->disp_a_base = INREG(DSPABASE);
+	hw->disp_b_base = INREG(DSPBBASE);
+	hw->disp_a_stride = INREG(DSPASTRIDE);
+	hw->disp_b_stride = INREG(DSPBSTRIDE);
+
+	if (flag == 9)
+		return flag;
+
+	hw->vgacntrl = INREG(VGACNTRL);
+
+	if (flag == 10)
+		return flag;
+
+	hw->add_id = INREG(ADD_ID);
+
+	if (flag == 11)
+		return flag;
+
+	for (i = 0; i < 7; i++) {
+		hw->swf0x[i] = INREG(SWF00 + (i << 2));
+		hw->swf1x[i] = INREG(SWF10 + (i << 2));
+		if (i < 3)
+			hw->swf3x[i] = INREG(SWF30 + (i << 2));
+	}
+
+	for (i = 0; i < 8; i++)
+		hw->fence[i] = INREG(FENCE + (i << 2));
+
+	hw->instpm = INREG(INSTPM);
+	hw->mem_mode = INREG(MEM_MODE);
+	hw->fw_blc_0 = INREG(FW_BLC_0);
+	hw->fw_blc_1 = INREG(FW_BLC_1);
+
+	hw->hwstam = INREG16(HWSTAM);
+	hw->ier = INREG16(IER);
+	hw->iir = INREG16(IIR);
+	hw->imr = INREG16(IMR);
+
+	return 0;
+}
+
+
+static int calc_vclock3(int index, int m, int n, int p)
+{
+	if (p == 0 || n == 0)
+		return 0;
+	return plls[index].ref_clk * m / n / p;
+}
+
+static int calc_vclock(int index, int m1, int m2, int n, int p1, int p2,
+		       int lvds)
+{
+	struct pll_min_max *pll = &plls[index];
+	u32 m, vco, p;
+
+	m = (5 * (m1 + 2)) + (m2 + 2);
+	n += 2;
+	vco = pll->ref_clk * m / n;
+
+	if (index == PLLS_I8xx)
+		p = ((p1 + 2) * (1 << (p2 + 1)));
+	else
+		p = ((p1) * (p2 ? 5 : 10));
+	return vco / p;
+}
+
+#if REGDUMP
+static void intelfbhw_get_p1p2(struct intelfb_info *dinfo, int dpll,
+			       int *o_p1, int *o_p2)
+{
+	int p1, p2;
+
+	if (IS_I9XX(dinfo)) {
+		if (dpll & DPLL_P1_FORCE_DIV2)
+			p1 = 1;
+		else
+			p1 = (dpll >> DPLL_P1_SHIFT) & 0xff;
+
+		p1 = ffs(p1);
+
+		p2 = (dpll >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
+	} else {
+		if (dpll & DPLL_P1_FORCE_DIV2)
+			p1 = 0;
+		else
+			p1 = (dpll >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
+		p2 = (dpll >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
+	}
+
+	*o_p1 = p1;
+	*o_p2 = p2;
+}
+#endif
+
+
+void intelfbhw_print_hw_state(struct intelfb_info *dinfo,
+			      struct intelfb_hwstate *hw)
+{
+#if REGDUMP
+	int i, m1, m2, n, p1, p2;
+	int index = dinfo->pll_index;
+	DBG_MSG("intelfbhw_print_hw_state\n");
+
+	if (!hw)
+		return;
+	/* Read in as much of the HW state as possible. */
+	printk("hw state dump start\n");
+	printk("	VGA0_DIVISOR:		0x%08x\n", hw->vga0_divisor);
+	printk("	VGA1_DIVISOR:		0x%08x\n", hw->vga1_divisor);
+	printk("	VGAPD:			0x%08x\n", hw->vga_pd);
+	n = (hw->vga0_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m1 = (hw->vga0_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m2 = (hw->vga0_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+
+	intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
+
+	printk("	VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
+	       m1, m2, n, p1, p2);
+	printk("	VGA0: clock is %d\n",
+	       calc_vclock(index, m1, m2, n, p1, p2, 0));
+
+	n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+
+	intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
+	printk("	VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
+	       m1, m2, n, p1, p2);
+	printk("	VGA1: clock is %d\n",
+	       calc_vclock(index, m1, m2, n, p1, p2, 0));
+
+	printk("	DPLL_A:			0x%08x\n", hw->dpll_a);
+	printk("	DPLL_B:			0x%08x\n", hw->dpll_b);
+	printk("	FPA0:			0x%08x\n", hw->fpa0);
+	printk("	FPA1:			0x%08x\n", hw->fpa1);
+	printk("	FPB0:			0x%08x\n", hw->fpb0);
+	printk("	FPB1:			0x%08x\n", hw->fpb1);
+
+	n = (hw->fpa0 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+
+	intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
+
+	printk("	PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
+	       m1, m2, n, p1, p2);
+	printk("	PLLA0: clock is %d\n",
+	       calc_vclock(index, m1, m2, n, p1, p2, 0));
+
+	n = (hw->fpa1 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+	m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
+
+	intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
+
+	printk("	PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
+	       m1, m2, n, p1, p2);
+	printk("	PLLA1: clock is %d\n",
+	       calc_vclock(index, m1, m2, n, p1, p2, 0));
+
+#if 0
+	printk("	PALETTE_A:\n");
+	for (i = 0; i < PALETTE_8_ENTRIES)
+		printk("	%3d:	0x%08x\n", i, hw->palette_a[i]);
+	printk("	PALETTE_B:\n");
+	for (i = 0; i < PALETTE_8_ENTRIES)
+		printk("	%3d:	0x%08x\n", i, hw->palette_b[i]);
+#endif
+
+	printk("	HTOTAL_A:		0x%08x\n", hw->htotal_a);
+	printk("	HBLANK_A:		0x%08x\n", hw->hblank_a);
+	printk("	HSYNC_A:		0x%08x\n", hw->hsync_a);
+	printk("	VTOTAL_A:		0x%08x\n", hw->vtotal_a);
+	printk("	VBLANK_A:		0x%08x\n", hw->vblank_a);
+	printk("	VSYNC_A:		0x%08x\n", hw->vsync_a);
+	printk("	SRC_SIZE_A:		0x%08x\n", hw->src_size_a);
+	printk("	BCLRPAT_A:		0x%08x\n", hw->bclrpat_a);
+	printk("	HTOTAL_B:		0x%08x\n", hw->htotal_b);
+	printk("	HBLANK_B:		0x%08x\n", hw->hblank_b);
+	printk("	HSYNC_B:		0x%08x\n", hw->hsync_b);
+	printk("	VTOTAL_B:		0x%08x\n", hw->vtotal_b);
+	printk("	VBLANK_B:		0x%08x\n", hw->vblank_b);
+	printk("	VSYNC_B:		0x%08x\n", hw->vsync_b);
+	printk("	SRC_SIZE_B:		0x%08x\n", hw->src_size_b);
+	printk("	BCLRPAT_B:		0x%08x\n", hw->bclrpat_b);
+
+	printk("	ADPA:			0x%08x\n", hw->adpa);
+	printk("	DVOA:			0x%08x\n", hw->dvoa);
+	printk("	DVOB:			0x%08x\n", hw->dvob);
+	printk("	DVOC:			0x%08x\n", hw->dvoc);
+	printk("	DVOA_SRCDIM:		0x%08x\n", hw->dvoa_srcdim);
+	printk("	DVOB_SRCDIM:		0x%08x\n", hw->dvob_srcdim);
+	printk("	DVOC_SRCDIM:		0x%08x\n", hw->dvoc_srcdim);
+	printk("	LVDS:			0x%08x\n", hw->lvds);
+
+	printk("	PIPEACONF:		0x%08x\n", hw->pipe_a_conf);
+	printk("	PIPEBCONF:		0x%08x\n", hw->pipe_b_conf);
+	printk("	DISPARB:		0x%08x\n", hw->disp_arb);
+
+	printk("	CURSOR_A_CONTROL:	0x%08x\n", hw->cursor_a_control);
+	printk("	CURSOR_B_CONTROL:	0x%08x\n", hw->cursor_b_control);
+	printk("	CURSOR_A_BASEADDR:	0x%08x\n", hw->cursor_a_base);
+	printk("	CURSOR_B_BASEADDR:	0x%08x\n", hw->cursor_b_base);
+
+	printk("	CURSOR_A_PALETTE:	");
+	for (i = 0; i < 4; i++) {
+		printk("0x%08x", hw->cursor_a_palette[i]);
+		if (i < 3)
+			printk(", ");
+	}
+	printk("\n");
+	printk("	CURSOR_B_PALETTE:	");
+	for (i = 0; i < 4; i++) {
+		printk("0x%08x", hw->cursor_b_palette[i]);
+		if (i < 3)
+			printk(", ");
+	}
+	printk("\n");
+
+	printk("	CURSOR_SIZE:		0x%08x\n", hw->cursor_size);
+
+	printk("	DSPACNTR:		0x%08x\n", hw->disp_a_ctrl);
+	printk("	DSPBCNTR:		0x%08x\n", hw->disp_b_ctrl);
+	printk("	DSPABASE:		0x%08x\n", hw->disp_a_base);
+	printk("	DSPBBASE:		0x%08x\n", hw->disp_b_base);
+	printk("	DSPASTRIDE:		0x%08x\n", hw->disp_a_stride);
+	printk("	DSPBSTRIDE:		0x%08x\n", hw->disp_b_stride);
+
+	printk("	VGACNTRL:		0x%08x\n", hw->vgacntrl);
+	printk("	ADD_ID:			0x%08x\n", hw->add_id);
+
+	for (i = 0; i < 7; i++) {
+		printk("	SWF0%d			0x%08x\n", i,
+			hw->swf0x[i]);
+	}
+	for (i = 0; i < 7; i++) {
+		printk("	SWF1%d			0x%08x\n", i,
+			hw->swf1x[i]);
+	}
+	for (i = 0; i < 3; i++) {
+		printk("	SWF3%d			0x%08x\n", i,
+		       hw->swf3x[i]);
+	}
+	for (i = 0; i < 8; i++)
+		printk("	FENCE%d			0x%08x\n", i,
+		       hw->fence[i]);
+
+	printk("	INSTPM			0x%08x\n", hw->instpm);
+	printk("	MEM_MODE		0x%08x\n", hw->mem_mode);
+	printk("	FW_BLC_0		0x%08x\n", hw->fw_blc_0);
+	printk("	FW_BLC_1		0x%08x\n", hw->fw_blc_1);
+
+	printk("	HWSTAM			0x%04x\n", hw->hwstam);
+	printk("	IER			0x%04x\n", hw->ier);
+	printk("	IIR			0x%04x\n", hw->iir);
+	printk("	IMR			0x%04x\n", hw->imr);
+	printk("hw state dump end\n");
+#endif
+}
+
+
+
+/* Split the M parameter into M1 and M2. */
+static int splitm(int index, unsigned int m, unsigned int *retm1,
+		  unsigned int *retm2)
+{
+	int m1, m2;
+	int testm;
+	struct pll_min_max *pll = &plls[index];
+
+	/* no point optimising too much - brute force m */
+	for (m1 = pll->min_m1; m1 < pll->max_m1 + 1; m1++) {
+		for (m2 = pll->min_m2; m2 < pll->max_m2 + 1; m2++) {
+			testm = (5 * (m1 + 2)) + (m2 + 2);
+			if (testm == m) {
+				*retm1 = (unsigned int)m1;
+				*retm2 = (unsigned int)m2;
+				return 0;
+			}
+		}
+	}
+	return 1;
+}
+
+/* Split the P parameter into P1 and P2. */
+static int splitp(int index, unsigned int p, unsigned int *retp1,
+		  unsigned int *retp2)
+{
+	int p1, p2;
+	struct pll_min_max *pll = &plls[index];
+
+	if (index == PLLS_I9xx) {
+		p2 = (p % 10) ? 1 : 0;
+
+		p1 = p / (p2 ? 5 : 10);
+
+		*retp1 = (unsigned int)p1;
+		*retp2 = (unsigned int)p2;
+		return 0;
+	}
+
+	if (p % 4 == 0)
+		p2 = 1;
+	else
+		p2 = 0;
+	p1 = (p / (1 << (p2 + 1))) - 2;
+	if (p % 4 == 0 && p1 < pll->min_p1) {
+		p2 = 0;
+		p1 = (p / (1 << (p2 + 1))) - 2;
+	}
+	if (p1 < pll->min_p1 || p1 > pll->max_p1 ||
+	    (p1 + 2) * (1 << (p2 + 1)) != p) {
+		return 1;
+	} else {
+		*retp1 = (unsigned int)p1;
+		*retp2 = (unsigned int)p2;
+		return 0;
+	}
+}
+
+static int calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2,
+			   u32 *retn, u32 *retp1, u32 *retp2, u32 *retclock)
+{
+	u32 m1, m2, n, p1, p2, n1, testm;
+	u32 f_vco, p, p_best = 0, m, f_out = 0;
+	u32 err_max, err_target, err_best = 10000000;
+	u32 n_best = 0, m_best = 0, f_best, f_err;
+	u32 p_min, p_max, p_inc, div_max;
+	struct pll_min_max *pll = &plls[index];
+
+	/* Accept 0.5% difference, but aim for 0.1% */
+	err_max = 5 * clock / 1000;
+	err_target = clock / 1000;
+
+	DBG_MSG("Clock is %d\n", clock);
+
+	div_max = pll->max_vco / clock;
+
+	p_inc = (clock <= pll->p_transition_clk) ? pll->p_inc_lo : pll->p_inc_hi;
+	p_min = p_inc;
+	p_max = ROUND_DOWN_TO(div_max, p_inc);
+	if (p_min < pll->min_p)
+		p_min = pll->min_p;
+	if (p_max > pll->max_p)
+		p_max = pll->max_p;
+
+	DBG_MSG("p range is %d-%d (%d)\n", p_min, p_max, p_inc);
+
+	p = p_min;
+	do {
+		if (splitp(index, p, &p1, &p2)) {
+			WRN_MSG("cannot split p = %d\n", p);
+			p += p_inc;
+			continue;
+		}
+		n = pll->min_n;
+		f_vco = clock * p;
+
+		do {
+			m = ROUND_UP_TO(f_vco * n, pll->ref_clk) / pll->ref_clk;
+			if (m < pll->min_m)
+				m = pll->min_m + 1;
+			if (m > pll->max_m)
+				m = pll->max_m - 1;
+			for (testm = m - 1; testm <= m; testm++) {
+				f_out = calc_vclock3(index, testm, n, p);
+				if (splitm(index, testm, &m1, &m2)) {
+					WRN_MSG("cannot split m = %d\n",
+						testm);
+					continue;
+				}
+				if (clock > f_out)
+					f_err = clock - f_out;
+				else/* slightly bias the error for bigger clocks */
+					f_err = f_out - clock + 1;
+
+				if (f_err < err_best) {
+					m_best = testm;
+					n_best = n;
+					p_best = p;
+					f_best = f_out;
+					err_best = f_err;
+				}
+			}
+			n++;
+		} while ((n <= pll->max_n) && (f_out >= clock));
+		p += p_inc;
+	} while ((p <= p_max));
+
+	if (!m_best) {
+		WRN_MSG("cannot find parameters for clock %d\n", clock);
+		return 1;
+	}
+	m = m_best;
+	n = n_best;
+	p = p_best;
+	splitm(index, m, &m1, &m2);
+	splitp(index, p, &p1, &p2);
+	n1 = n - 2;
+
+	DBG_MSG("m, n, p: %d (%d,%d), %d (%d), %d (%d,%d), "
+		"f: %d (%d), VCO: %d\n",
+		m, m1, m2, n, n1, p, p1, p2,
+		calc_vclock3(index, m, n, p),
+		calc_vclock(index, m1, m2, n1, p1, p2, 0),
+		calc_vclock3(index, m, n, p) * p);
+	*retm1 = m1;
+	*retm2 = m2;
+	*retn = n1;
+	*retp1 = p1;
+	*retp2 = p2;
+	*retclock = calc_vclock(index, m1, m2, n1, p1, p2, 0);
+
+	return 0;
+}
+
+static __inline__ int check_overflow(u32 value, u32 limit,
+				     const char *description)
+{
+	if (value > limit) {
+		WRN_MSG("%s value %d exceeds limit %d\n",
+			description, value, limit);
+		return 1;
+	}
+	return 0;
+}
+
+/* It is assumed that hw is filled in with the initial state information. */
+int intelfbhw_mode_to_hw(struct intelfb_info *dinfo,
+			 struct intelfb_hwstate *hw,
+			 struct fb_var_screeninfo *var)
+{
+	int pipe = intelfbhw_active_pipe(hw);
+	u32 *dpll, *fp0, *fp1;
+	u32 m1, m2, n, p1, p2, clock_target, clock;
+	u32 hsync_start, hsync_end, hblank_start, hblank_end, htotal, hactive;
+	u32 vsync_start, vsync_end, vblank_start, vblank_end, vtotal, vactive;
+	u32 vsync_pol, hsync_pol;
+	u32 *vs, *vb, *vt, *hs, *hb, *ht, *ss, *pipe_conf;
+	u32 stride_alignment;
+
+	DBG_MSG("intelfbhw_mode_to_hw\n");
+
+	/* Disable VGA */
+	hw->vgacntrl |= VGA_DISABLE;
+
+	/* Set which pipe's registers will be set. */
+	if (pipe == PIPE_B) {
+		dpll = &hw->dpll_b;
+		fp0 = &hw->fpb0;
+		fp1 = &hw->fpb1;
+		hs = &hw->hsync_b;
+		hb = &hw->hblank_b;
+		ht = &hw->htotal_b;
+		vs = &hw->vsync_b;
+		vb = &hw->vblank_b;
+		vt = &hw->vtotal_b;
+		ss = &hw->src_size_b;
+		pipe_conf = &hw->pipe_b_conf;
+	} else {
+		dpll = &hw->dpll_a;
+		fp0 = &hw->fpa0;
+		fp1 = &hw->fpa1;
+		hs = &hw->hsync_a;
+		hb = &hw->hblank_a;
+		ht = &hw->htotal_a;
+		vs = &hw->vsync_a;
+		vb = &hw->vblank_a;
+		vt = &hw->vtotal_a;
+		ss = &hw->src_size_a;
+		pipe_conf = &hw->pipe_a_conf;
+	}
+
+	/* Use ADPA register for sync control. */
+	hw->adpa &= ~ADPA_USE_VGA_HVPOLARITY;
+
+	/* sync polarity */
+	hsync_pol = (var->sync & FB_SYNC_HOR_HIGH_ACT) ?
+			ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
+	vsync_pol = (var->sync & FB_SYNC_VERT_HIGH_ACT) ?
+			ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
+	hw->adpa &= ~((ADPA_SYNC_ACTIVE_MASK << ADPA_VSYNC_ACTIVE_SHIFT) |
+		      (ADPA_SYNC_ACTIVE_MASK << ADPA_HSYNC_ACTIVE_SHIFT));
+	hw->adpa |= (hsync_pol << ADPA_HSYNC_ACTIVE_SHIFT) |
+		    (vsync_pol << ADPA_VSYNC_ACTIVE_SHIFT);
+
+	/* Connect correct pipe to the analog port DAC */
+	hw->adpa &= ~(PIPE_MASK << ADPA_PIPE_SELECT_SHIFT);
+	hw->adpa |= (pipe << ADPA_PIPE_SELECT_SHIFT);
+
+	/* Set DPMS state to D0 (on) */
+	hw->adpa &= ~ADPA_DPMS_CONTROL_MASK;
+	hw->adpa |= ADPA_DPMS_D0;
+
+	hw->adpa |= ADPA_DAC_ENABLE;
+
+	*dpll |= (DPLL_VCO_ENABLE | DPLL_VGA_MODE_DISABLE);
+	*dpll &= ~(DPLL_RATE_SELECT_MASK | DPLL_REFERENCE_SELECT_MASK);
+	*dpll |= (DPLL_REFERENCE_DEFAULT | DPLL_RATE_SELECT_FP0);
+
+	/* Desired clock in kHz */
+	clock_target = 1000000000 / var->pixclock;
+
+	if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2,
+			    &n, &p1, &p2, &clock)) {
+		WRN_MSG("calc_pll_params failed\n");
+		return 1;
+	}
+
+	/* Check for overflow. */
+	if (check_overflow(p1, DPLL_P1_MASK, "PLL P1 parameter"))
+		return 1;
+	if (check_overflow(p2, DPLL_P2_MASK, "PLL P2 parameter"))
+		return 1;
+	if (check_overflow(m1, FP_DIVISOR_MASK, "PLL M1 parameter"))
+		return 1;
+	if (check_overflow(m2, FP_DIVISOR_MASK, "PLL M2 parameter"))
+		return 1;
+	if (check_overflow(n, FP_DIVISOR_MASK, "PLL N parameter"))
+		return 1;
+
+	*dpll &= ~DPLL_P1_FORCE_DIV2;
+	*dpll &= ~((DPLL_P2_MASK << DPLL_P2_SHIFT) |
+		   (DPLL_P1_MASK << DPLL_P1_SHIFT));
+
+	if (IS_I9XX(dinfo)) {
+		*dpll |= (p2 << DPLL_I9XX_P2_SHIFT);
+		*dpll |= (1 << (p1 - 1)) << DPLL_P1_SHIFT;
+	} else
+		*dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT);
+
+	*fp0 = (n << FP_N_DIVISOR_SHIFT) |
+	       (m1 << FP_M1_DIVISOR_SHIFT) |
+	       (m2 << FP_M2_DIVISOR_SHIFT);
+	*fp1 = *fp0;
+
+	hw->dvob &= ~PORT_ENABLE;
+	hw->dvoc &= ~PORT_ENABLE;
+
+	/* Use display plane A. */
+	hw->disp_a_ctrl |= DISPPLANE_PLANE_ENABLE;
+	hw->disp_a_ctrl &= ~DISPPLANE_GAMMA_ENABLE;
+	hw->disp_a_ctrl &= ~DISPPLANE_PIXFORMAT_MASK;
+	switch (intelfb_var_to_depth(var)) {
+	case 8:
+		hw->disp_a_ctrl |= DISPPLANE_8BPP | DISPPLANE_GAMMA_ENABLE;
+		break;
+	case 15:
+		hw->disp_a_ctrl |= DISPPLANE_15_16BPP;
+		break;
+	case 16:
+		hw->disp_a_ctrl |= DISPPLANE_16BPP;
+		break;
+	case 24:
+		hw->disp_a_ctrl |= DISPPLANE_32BPP_NO_ALPHA;
+		break;
+	}
+	hw->disp_a_ctrl &= ~(PIPE_MASK << DISPPLANE_SEL_PIPE_SHIFT);
+	hw->disp_a_ctrl |= (pipe << DISPPLANE_SEL_PIPE_SHIFT);
+
+	/* Set CRTC registers. */
+	hactive = var->xres;
+	hsync_start = hactive + var->right_margin;
+	hsync_end = hsync_start + var->hsync_len;
+	htotal = hsync_end + var->left_margin;
+	hblank_start = hactive;
+	hblank_end = htotal;
+
+	DBG_MSG("H: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
+		hactive, hsync_start, hsync_end, htotal, hblank_start,
+		hblank_end);
+
+	vactive = var->yres;
+	if (var->vmode & FB_VMODE_INTERLACED)
+		vactive--; /* the chip adds 2 halflines automatically */
+	vsync_start = vactive + var->lower_margin;
+	vsync_end = vsync_start + var->vsync_len;
+	vtotal = vsync_end + var->upper_margin;
+	vblank_start = vactive;
+	vblank_end = vtotal;
+	vblank_end = vsync_end + 1;
+
+	DBG_MSG("V: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
+		vactive, vsync_start, vsync_end, vtotal, vblank_start,
+		vblank_end);
+
+	/* Adjust for register values, and check for overflow. */
+	hactive--;
+	if (check_overflow(hactive, HACTIVE_MASK, "CRTC hactive"))
+		return 1;
+	hsync_start--;
+	if (check_overflow(hsync_start, HSYNCSTART_MASK, "CRTC hsync_start"))
+		return 1;
+	hsync_end--;
+	if (check_overflow(hsync_end, HSYNCEND_MASK, "CRTC hsync_end"))
+		return 1;
+	htotal--;
+	if (check_overflow(htotal, HTOTAL_MASK, "CRTC htotal"))
+		return 1;
+	hblank_start--;
+	if (check_overflow(hblank_start, HBLANKSTART_MASK, "CRTC hblank_start"))
+		return 1;
+	hblank_end--;
+	if (check_overflow(hblank_end, HBLANKEND_MASK, "CRTC hblank_end"))
+		return 1;
+
+	vactive--;
+	if (check_overflow(vactive, VACTIVE_MASK, "CRTC vactive"))
+		return 1;
+	vsync_start--;
+	if (check_overflow(vsync_start, VSYNCSTART_MASK, "CRTC vsync_start"))
+		return 1;
+	vsync_end--;
+	if (check_overflow(vsync_end, VSYNCEND_MASK, "CRTC vsync_end"))
+		return 1;
+	vtotal--;
+	if (check_overflow(vtotal, VTOTAL_MASK, "CRTC vtotal"))
+		return 1;
+	vblank_start--;
+	if (check_overflow(vblank_start, VBLANKSTART_MASK, "CRTC vblank_start"))
+		return 1;
+	vblank_end--;
+	if (check_overflow(vblank_end, VBLANKEND_MASK, "CRTC vblank_end"))
+		return 1;
+
+	*ht = (htotal << HTOTAL_SHIFT) | (hactive << HACTIVE_SHIFT);
+	*hb = (hblank_start << HBLANKSTART_SHIFT) |
+	      (hblank_end << HSYNCEND_SHIFT);
+	*hs = (hsync_start << HSYNCSTART_SHIFT) | (hsync_end << HSYNCEND_SHIFT);
+
+	*vt = (vtotal << VTOTAL_SHIFT) | (vactive << VACTIVE_SHIFT);
+	*vb = (vblank_start << VBLANKSTART_SHIFT) |
+	      (vblank_end << VSYNCEND_SHIFT);
+	*vs = (vsync_start << VSYNCSTART_SHIFT) | (vsync_end << VSYNCEND_SHIFT);
+	*ss = (hactive << SRC_SIZE_HORIZ_SHIFT) |
+	      (vactive << SRC_SIZE_VERT_SHIFT);
+
+	hw->disp_a_stride = dinfo->pitch;
+	DBG_MSG("pitch is %d\n", hw->disp_a_stride);
+
+	hw->disp_a_base = hw->disp_a_stride * var->yoffset +
+			  var->xoffset * var->bits_per_pixel / 8;
+
+	hw->disp_a_base += dinfo->fb.offset << 12;
+
+	/* Check stride alignment. */
+	stride_alignment = IS_I9XX(dinfo) ? STRIDE_ALIGNMENT_I9XX :
+					    STRIDE_ALIGNMENT;
+	if (hw->disp_a_stride % stride_alignment != 0) {
+		WRN_MSG("display stride %d has bad alignment %d\n",
+			hw->disp_a_stride, stride_alignment);
+		return 1;
+	}
+
+	/* Set the palette to 8-bit mode. */
+	*pipe_conf &= ~PIPECONF_GAMMA;
+
+	if (var->vmode & FB_VMODE_INTERLACED)
+		*pipe_conf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
+	else
+		*pipe_conf &= ~PIPECONF_INTERLACE_MASK;
+
+	return 0;
+}
+
+/* Program a (non-VGA) video mode. */
+int intelfbhw_program_mode(struct intelfb_info *dinfo,
+			   const struct intelfb_hwstate *hw, int blank)
+{
+	u32 tmp;
+	const u32 *dpll, *fp0, *fp1, *pipe_conf;
+	const u32 *hs, *ht, *hb, *vs, *vt, *vb, *ss;
+	u32 dpll_reg, fp0_reg, fp1_reg, pipe_conf_reg, pipe_stat_reg;
+	u32 hsync_reg, htotal_reg, hblank_reg;
+	u32 vsync_reg, vtotal_reg, vblank_reg;
+	u32 src_size_reg;
+	u32 count, tmp_val[3];
+
+	/* Assume single pipe */
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_program_mode\n");
+#endif
+
+	/* Disable VGA */
+	tmp = INREG(VGACNTRL);
+	tmp |= VGA_DISABLE;
+	OUTREG(VGACNTRL, tmp);
+
+	dinfo->pipe = intelfbhw_active_pipe(hw);
+
+	if (dinfo->pipe == PIPE_B) {
+		dpll = &hw->dpll_b;
+		fp0 = &hw->fpb0;
+		fp1 = &hw->fpb1;
+		pipe_conf = &hw->pipe_b_conf;
+		hs = &hw->hsync_b;
+		hb = &hw->hblank_b;
+		ht = &hw->htotal_b;
+		vs = &hw->vsync_b;
+		vb = &hw->vblank_b;
+		vt = &hw->vtotal_b;
+		ss = &hw->src_size_b;
+		dpll_reg = DPLL_B;
+		fp0_reg = FPB0;
+		fp1_reg = FPB1;
+		pipe_conf_reg = PIPEBCONF;
+		pipe_stat_reg = PIPEBSTAT;
+		hsync_reg = HSYNC_B;
+		htotal_reg = HTOTAL_B;
+		hblank_reg = HBLANK_B;
+		vsync_reg = VSYNC_B;
+		vtotal_reg = VTOTAL_B;
+		vblank_reg = VBLANK_B;
+		src_size_reg = SRC_SIZE_B;
+	} else {
+		dpll = &hw->dpll_a;
+		fp0 = &hw->fpa0;
+		fp1 = &hw->fpa1;
+		pipe_conf = &hw->pipe_a_conf;
+		hs = &hw->hsync_a;
+		hb = &hw->hblank_a;
+		ht = &hw->htotal_a;
+		vs = &hw->vsync_a;
+		vb = &hw->vblank_a;
+		vt = &hw->vtotal_a;
+		ss = &hw->src_size_a;
+		dpll_reg = DPLL_A;
+		fp0_reg = FPA0;
+		fp1_reg = FPA1;
+		pipe_conf_reg = PIPEACONF;
+		pipe_stat_reg = PIPEASTAT;
+		hsync_reg = HSYNC_A;
+		htotal_reg = HTOTAL_A;
+		hblank_reg = HBLANK_A;
+		vsync_reg = VSYNC_A;
+		vtotal_reg = VTOTAL_A;
+		vblank_reg = VBLANK_A;
+		src_size_reg = SRC_SIZE_A;
+	}
+
+	/* turn off pipe */
+	tmp = INREG(pipe_conf_reg);
+	tmp &= ~PIPECONF_ENABLE;
+	OUTREG(pipe_conf_reg, tmp);
+
+	count = 0;
+	do {
+		tmp_val[count % 3] = INREG(PIPEA_DSL);
+		if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1] == tmp_val[2]))
+			break;
+		count++;
+		udelay(1);
+		if (count % 200 == 0) {
+			tmp = INREG(pipe_conf_reg);
+			tmp &= ~PIPECONF_ENABLE;
+			OUTREG(pipe_conf_reg, tmp);
+		}
+	} while (count < 2000);
+
+	OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
+
+	/* Disable planes A and B. */
+	tmp = INREG(DSPACNTR);
+	tmp &= ~DISPPLANE_PLANE_ENABLE;
+	OUTREG(DSPACNTR, tmp);
+	tmp = INREG(DSPBCNTR);
+	tmp &= ~DISPPLANE_PLANE_ENABLE;
+	OUTREG(DSPBCNTR, tmp);
+
+	/* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
+	mdelay(20);
+
+	OUTREG(DVOB, INREG(DVOB) & ~PORT_ENABLE);
+	OUTREG(DVOC, INREG(DVOC) & ~PORT_ENABLE);
+	OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
+
+	/* Disable Sync */
+	tmp = INREG(ADPA);
+	tmp &= ~ADPA_DPMS_CONTROL_MASK;
+	tmp |= ADPA_DPMS_D3;
+	OUTREG(ADPA, tmp);
+
+	/* do some funky magic - xyzzy */
+	OUTREG(0x61204, 0xabcd0000);
+
+	/* turn off PLL */
+	tmp = INREG(dpll_reg);
+	tmp &= ~DPLL_VCO_ENABLE;
+	OUTREG(dpll_reg, tmp);
+
+	/* Set PLL parameters */
+	OUTREG(fp0_reg, *fp0);
+	OUTREG(fp1_reg, *fp1);
+
+	/* Enable PLL */
+	OUTREG(dpll_reg, *dpll);
+
+	/* Set DVOs B/C */
+	OUTREG(DVOB, hw->dvob);
+	OUTREG(DVOC, hw->dvoc);
+
+	/* undo funky magic */
+	OUTREG(0x61204, 0x00000000);
+
+	/* Set ADPA */
+	OUTREG(ADPA, INREG(ADPA) | ADPA_DAC_ENABLE);
+	OUTREG(ADPA, (hw->adpa & ~(ADPA_DPMS_CONTROL_MASK)) | ADPA_DPMS_D3);
+
+	/* Set pipe parameters */
+	OUTREG(hsync_reg, *hs);
+	OUTREG(hblank_reg, *hb);
+	OUTREG(htotal_reg, *ht);
+	OUTREG(vsync_reg, *vs);
+	OUTREG(vblank_reg, *vb);
+	OUTREG(vtotal_reg, *vt);
+	OUTREG(src_size_reg, *ss);
+
+	switch (dinfo->info->var.vmode & (FB_VMODE_INTERLACED |
+					  FB_VMODE_ODD_FLD_FIRST)) {
+	case FB_VMODE_INTERLACED | FB_VMODE_ODD_FLD_FIRST:
+		OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_ODD_EN);
+		break;
+	case FB_VMODE_INTERLACED: /* even lines first */
+		OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_EVEN_EN);
+		break;
+	default:		/* non-interlaced */
+		OUTREG(pipe_stat_reg, 0xFFFF); /* clear all status bits only */
+	}
+	/* Enable pipe */
+	OUTREG(pipe_conf_reg, *pipe_conf | PIPECONF_ENABLE);
+
+	/* Enable sync */
+	tmp = INREG(ADPA);
+	tmp &= ~ADPA_DPMS_CONTROL_MASK;
+	tmp |= ADPA_DPMS_D0;
+	OUTREG(ADPA, tmp);
+
+	/* setup display plane */
+	if (dinfo->pdev->device == PCI_DEVICE_ID_INTEL_830M) {
+		/*
+		 *      i830M errata: the display plane must be enabled
+		 *      to allow writes to the other bits in the plane
+		 *      control register.
+		 */
+		tmp = INREG(DSPACNTR);
+		if ((tmp & DISPPLANE_PLANE_ENABLE) != DISPPLANE_PLANE_ENABLE) {
+			tmp |= DISPPLANE_PLANE_ENABLE;
+			OUTREG(DSPACNTR, tmp);
+			OUTREG(DSPACNTR,
+			       hw->disp_a_ctrl|DISPPLANE_PLANE_ENABLE);
+			mdelay(1);
+		}
+	}
+
+	OUTREG(DSPACNTR, hw->disp_a_ctrl & ~DISPPLANE_PLANE_ENABLE);
+	OUTREG(DSPASTRIDE, hw->disp_a_stride);
+	OUTREG(DSPABASE, hw->disp_a_base);
+
+	/* Enable plane */
+	if (!blank) {
+		tmp = INREG(DSPACNTR);
+		tmp |= DISPPLANE_PLANE_ENABLE;
+		OUTREG(DSPACNTR, tmp);
+		OUTREG(DSPABASE, hw->disp_a_base);
+	}
+
+	return 0;
+}
+
+/* forward declarations */
+static void refresh_ring(struct intelfb_info *dinfo);
+static void reset_state(struct intelfb_info *dinfo);
+static void do_flush(struct intelfb_info *dinfo);
+
+static  u32 get_ring_space(struct intelfb_info *dinfo)
+{
+	u32 ring_space;
+
+	if (dinfo->ring_tail >= dinfo->ring_head)
+		ring_space = dinfo->ring.size -
+			(dinfo->ring_tail - dinfo->ring_head);
+	else
+		ring_space = dinfo->ring_head - dinfo->ring_tail;
+
+	if (ring_space > RING_MIN_FREE)
+		ring_space -= RING_MIN_FREE;
+	else
+		ring_space = 0;
+
+	return ring_space;
+}
+
+static int wait_ring(struct intelfb_info *dinfo, int n)
+{
+	int i = 0;
+	unsigned long end;
+	u32 last_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
+
+#if VERBOSE > 0
+	DBG_MSG("wait_ring: %d\n", n);
+#endif
+
+	end = jiffies + (HZ * 3);
+	while (dinfo->ring_space < n) {
+		dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
+		dinfo->ring_space = get_ring_space(dinfo);
+
+		if (dinfo->ring_head != last_head) {
+			end = jiffies + (HZ * 3);
+			last_head = dinfo->ring_head;
+		}
+		i++;
+		if (time_before(end, jiffies)) {
+			if (!i) {
+				/* Try again */
+				reset_state(dinfo);
+				refresh_ring(dinfo);
+				do_flush(dinfo);
+				end = jiffies + (HZ * 3);
+				i = 1;
+			} else {
+				WRN_MSG("ring buffer : space: %d wanted %d\n",
+					dinfo->ring_space, n);
+				WRN_MSG("lockup - turning off hardware "
+					"acceleration\n");
+				dinfo->ring_lockup = 1;
+				break;
+			}
+		}
+		udelay(1);
+	}
+	return i;
+}
+
+static void do_flush(struct intelfb_info *dinfo)
+{
+	START_RING(2);
+	OUT_RING(MI_FLUSH | MI_WRITE_DIRTY_STATE | MI_INVALIDATE_MAP_CACHE);
+	OUT_RING(MI_NOOP);
+	ADVANCE_RING();
+}
+
+void intelfbhw_do_sync(struct intelfb_info *dinfo)
+{
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_do_sync\n");
+#endif
+
+	if (!dinfo->accel)
+		return;
+
+	/*
+	 * Send a flush, then wait until the ring is empty.  This is what
+	 * the XFree86 driver does, and actually it doesn't seem a lot worse
+	 * than the recommended method (both have problems).
+	 */
+	do_flush(dinfo);
+	wait_ring(dinfo, dinfo->ring.size - RING_MIN_FREE);
+	dinfo->ring_space = dinfo->ring.size - RING_MIN_FREE;
+}
+
+static void refresh_ring(struct intelfb_info *dinfo)
+{
+#if VERBOSE > 0
+	DBG_MSG("refresh_ring\n");
+#endif
+
+	dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
+	dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;
+	dinfo->ring_space = get_ring_space(dinfo);
+}
+
+static void reset_state(struct intelfb_info *dinfo)
+{
+	int i;
+	u32 tmp;
+
+#if VERBOSE > 0
+	DBG_MSG("reset_state\n");
+#endif
+
+	for (i = 0; i < FENCE_NUM; i++)
+		OUTREG(FENCE + (i << 2), 0);
+
+	/* Flush the ring buffer if it's enabled. */
+	tmp = INREG(PRI_RING_LENGTH);
+	if (tmp & RING_ENABLE) {
+#if VERBOSE > 0
+		DBG_MSG("reset_state: ring was enabled\n");
+#endif
+		refresh_ring(dinfo);
+		intelfbhw_do_sync(dinfo);
+		DO_RING_IDLE();
+	}
+
+	OUTREG(PRI_RING_LENGTH, 0);
+	OUTREG(PRI_RING_HEAD, 0);
+	OUTREG(PRI_RING_TAIL, 0);
+	OUTREG(PRI_RING_START, 0);
+}
+
+/* Stop the 2D engine, and turn off the ring buffer. */
+void intelfbhw_2d_stop(struct intelfb_info *dinfo)
+{
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_2d_stop: accel: %d, ring_active: %d\n",
+		dinfo->accel, dinfo->ring_active);
+#endif
+
+	if (!dinfo->accel)
+		return;
+
+	dinfo->ring_active = 0;
+	reset_state(dinfo);
+}
+
+/*
+ * Enable the ring buffer, and initialise the 2D engine.
+ * It is assumed that the graphics engine has been stopped by previously
+ * calling intelfb_2d_stop().
+ */
+void intelfbhw_2d_start(struct intelfb_info *dinfo)
+{
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_2d_start: accel: %d, ring_active: %d\n",
+		dinfo->accel, dinfo->ring_active);
+#endif
+
+	if (!dinfo->accel)
+		return;
+
+	/* Initialise the primary ring buffer. */
+	OUTREG(PRI_RING_LENGTH, 0);
+	OUTREG(PRI_RING_TAIL, 0);
+	OUTREG(PRI_RING_HEAD, 0);
+
+	OUTREG(PRI_RING_START, dinfo->ring.physical & RING_START_MASK);
+	OUTREG(PRI_RING_LENGTH,
+		((dinfo->ring.size - GTT_PAGE_SIZE) & RING_LENGTH_MASK) |
+		RING_NO_REPORT | RING_ENABLE);
+	refresh_ring(dinfo);
+	dinfo->ring_active = 1;
+}
+
+/* 2D fillrect (solid fill or invert) */
+void intelfbhw_do_fillrect(struct intelfb_info *dinfo, u32 x, u32 y, u32 w,
+			   u32 h, u32 color, u32 pitch, u32 bpp, u32 rop)
+{
+	u32 br00, br09, br13, br14, br16;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_do_fillrect: (%d,%d) %dx%d, c 0x%06x, p %d bpp %d, "
+		"rop 0x%02x\n", x, y, w, h, color, pitch, bpp, rop);
+#endif
+
+	br00 = COLOR_BLT_CMD;
+	br09 = dinfo->fb_start + (y * pitch + x * (bpp / 8));
+	br13 = (rop << ROP_SHIFT) | pitch;
+	br14 = (h << HEIGHT_SHIFT) | ((w * (bpp / 8)) << WIDTH_SHIFT);
+	br16 = color;
+
+	switch (bpp) {
+	case 8:
+		br13 |= COLOR_DEPTH_8;
+		break;
+	case 16:
+		br13 |= COLOR_DEPTH_16;
+		break;
+	case 32:
+		br13 |= COLOR_DEPTH_32;
+		br00 |= WRITE_ALPHA | WRITE_RGB;
+		break;
+	}
+
+	START_RING(6);
+	OUT_RING(br00);
+	OUT_RING(br13);
+	OUT_RING(br14);
+	OUT_RING(br09);
+	OUT_RING(br16);
+	OUT_RING(MI_NOOP);
+	ADVANCE_RING();
+
+#if VERBOSE > 0
+	DBG_MSG("ring = 0x%08x, 0x%08x (%d)\n", dinfo->ring_head,
+		dinfo->ring_tail, dinfo->ring_space);
+#endif
+}
+
+void
+intelfbhw_do_bitblt(struct intelfb_info *dinfo, u32 curx, u32 cury,
+		    u32 dstx, u32 dsty, u32 w, u32 h, u32 pitch, u32 bpp)
+{
+	u32 br00, br09, br11, br12, br13, br22, br23, br26;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_do_bitblt: (%d,%d)->(%d,%d) %dx%d, p %d bpp %d\n",
+		curx, cury, dstx, dsty, w, h, pitch, bpp);
+#endif
+
+	br00 = XY_SRC_COPY_BLT_CMD;
+	br09 = dinfo->fb_start;
+	br11 = (pitch << PITCH_SHIFT);
+	br12 = dinfo->fb_start;
+	br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
+	br22 = (dstx << WIDTH_SHIFT) | (dsty << HEIGHT_SHIFT);
+	br23 = ((dstx + w) << WIDTH_SHIFT) |
+	       ((dsty + h) << HEIGHT_SHIFT);
+	br26 = (curx << WIDTH_SHIFT) | (cury << HEIGHT_SHIFT);
+
+	switch (bpp) {
+	case 8:
+		br13 |= COLOR_DEPTH_8;
+		break;
+	case 16:
+		br13 |= COLOR_DEPTH_16;
+		break;
+	case 32:
+		br13 |= COLOR_DEPTH_32;
+		br00 |= WRITE_ALPHA | WRITE_RGB;
+		break;
+	}
+
+	START_RING(8);
+	OUT_RING(br00);
+	OUT_RING(br13);
+	OUT_RING(br22);
+	OUT_RING(br23);
+	OUT_RING(br09);
+	OUT_RING(br26);
+	OUT_RING(br11);
+	OUT_RING(br12);
+	ADVANCE_RING();
+}
+
+int intelfbhw_do_drawglyph(struct intelfb_info *dinfo, u32 fg, u32 bg, u32 w,
+			   u32 h, const u8* cdat, u32 x, u32 y, u32 pitch,
+			   u32 bpp)
+{
+	int nbytes, ndwords, pad, tmp;
+	u32 br00, br09, br13, br18, br19, br22, br23;
+	int dat, ix, iy, iw;
+	int i, j;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_do_drawglyph: (%d,%d) %dx%d\n", x, y, w, h);
+#endif
+
+	/* size in bytes of a padded scanline */
+	nbytes = ROUND_UP_TO(w, 16) / 8;
+
+	/* Total bytes of padded scanline data to write out. */
+	nbytes = nbytes * h;
+
+	/*
+	 * Check if the glyph data exceeds the immediate mode limit.
+	 * It would take a large font (1K pixels) to hit this limit.
+	 */
+	if (nbytes > MAX_MONO_IMM_SIZE)
+		return 0;
+
+	/* Src data is packaged a dword (32-bit) at a time. */
+	ndwords = ROUND_UP_TO(nbytes, 4) / 4;
+
+	/*
+	 * Ring has to be padded to a quad word. But because the command starts
+	   with 7 bytes, pad only if there is an even number of ndwords
+	 */
+	pad = !(ndwords % 2);
+
+	tmp = (XY_MONO_SRC_IMM_BLT_CMD & DW_LENGTH_MASK) + ndwords;
+	br00 = (XY_MONO_SRC_IMM_BLT_CMD & ~DW_LENGTH_MASK) | tmp;
+	br09 = dinfo->fb_start;
+	br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
+	br18 = bg;
+	br19 = fg;
+	br22 = (x << WIDTH_SHIFT) | (y << HEIGHT_SHIFT);
+	br23 = ((x + w) << WIDTH_SHIFT) | ((y + h) << HEIGHT_SHIFT);
+
+	switch (bpp) {
+	case 8:
+		br13 |= COLOR_DEPTH_8;
+		break;
+	case 16:
+		br13 |= COLOR_DEPTH_16;
+		break;
+	case 32:
+		br13 |= COLOR_DEPTH_32;
+		br00 |= WRITE_ALPHA | WRITE_RGB;
+		break;
+	}
+
+	START_RING(8 + ndwords);
+	OUT_RING(br00);
+	OUT_RING(br13);
+	OUT_RING(br22);
+	OUT_RING(br23);
+	OUT_RING(br09);
+	OUT_RING(br18);
+	OUT_RING(br19);
+	ix = iy = 0;
+	iw = ROUND_UP_TO(w, 8) / 8;
+	while (ndwords--) {
+		dat = 0;
+		for (j = 0; j < 2; ++j) {
+			for (i = 0; i < 2; ++i) {
+				if (ix != iw || i == 0)
+					dat |= cdat[iy*iw + ix++] << (i+j*2)*8;
+			}
+			if (ix == iw && iy != (h-1)) {
+				ix = 0;
+				++iy;
+			}
+		}
+		OUT_RING(dat);
+	}
+	if (pad)
+		OUT_RING(MI_NOOP);
+	ADVANCE_RING();
+
+	return 1;
+}
+
+/* HW cursor functions. */
+void intelfbhw_cursor_init(struct intelfb_info *dinfo)
+{
+	u32 tmp;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_cursor_init\n");
+#endif
+
+	if (dinfo->mobile || IS_I9XX(dinfo)) {
+		if (!dinfo->cursor.physical)
+			return;
+		tmp = INREG(CURSOR_A_CONTROL);
+		tmp &= ~(CURSOR_MODE_MASK | CURSOR_MOBILE_GAMMA_ENABLE |
+			 CURSOR_MEM_TYPE_LOCAL |
+			 (1 << CURSOR_PIPE_SELECT_SHIFT));
+		tmp |= CURSOR_MODE_DISABLE;
+		OUTREG(CURSOR_A_CONTROL, tmp);
+		OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
+	} else {
+		tmp = INREG(CURSOR_CONTROL);
+		tmp &= ~(CURSOR_FORMAT_MASK | CURSOR_GAMMA_ENABLE |
+			 CURSOR_ENABLE | CURSOR_STRIDE_MASK);
+		tmp = CURSOR_FORMAT_3C;
+		OUTREG(CURSOR_CONTROL, tmp);
+		OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.offset << 12);
+		tmp = (64 << CURSOR_SIZE_H_SHIFT) |
+		      (64 << CURSOR_SIZE_V_SHIFT);
+		OUTREG(CURSOR_SIZE, tmp);
+	}
+}
+
+void intelfbhw_cursor_hide(struct intelfb_info *dinfo)
+{
+	u32 tmp;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_cursor_hide\n");
+#endif
+
+	dinfo->cursor_on = 0;
+	if (dinfo->mobile || IS_I9XX(dinfo)) {
+		if (!dinfo->cursor.physical)
+			return;
+		tmp = INREG(CURSOR_A_CONTROL);
+		tmp &= ~CURSOR_MODE_MASK;
+		tmp |= CURSOR_MODE_DISABLE;
+		OUTREG(CURSOR_A_CONTROL, tmp);
+		/* Flush changes */
+		OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
+	} else {
+		tmp = INREG(CURSOR_CONTROL);
+		tmp &= ~CURSOR_ENABLE;
+		OUTREG(CURSOR_CONTROL, tmp);
+	}
+}
+
+void intelfbhw_cursor_show(struct intelfb_info *dinfo)
+{
+	u32 tmp;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_cursor_show\n");
+#endif
+
+	dinfo->cursor_on = 1;
+
+	if (dinfo->cursor_blanked)
+		return;
+
+	if (dinfo->mobile || IS_I9XX(dinfo)) {
+		if (!dinfo->cursor.physical)
+			return;
+		tmp = INREG(CURSOR_A_CONTROL);
+		tmp &= ~CURSOR_MODE_MASK;
+		tmp |= CURSOR_MODE_64_4C_AX;
+		OUTREG(CURSOR_A_CONTROL, tmp);
+		/* Flush changes */
+		OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
+	} else {
+		tmp = INREG(CURSOR_CONTROL);
+		tmp |= CURSOR_ENABLE;
+		OUTREG(CURSOR_CONTROL, tmp);
+	}
+}
+
+void intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y)
+{
+	u32 tmp;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_cursor_setpos: (%d, %d)\n", x, y);
+#endif
+
+	/*
+	 * Sets the position. The coordinates are assumed to already
+	 * have any offset adjusted. Assume that the cursor is never
+	 * completely off-screen, and that x, y are always >= 0.
+	 */
+
+	tmp = ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT) |
+	      ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
+	OUTREG(CURSOR_A_POSITION, tmp);
+
+	if (IS_I9XX(dinfo))
+		OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
+}
+
+void intelfbhw_cursor_setcolor(struct intelfb_info *dinfo, u32 bg, u32 fg)
+{
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_cursor_setcolor\n");
+#endif
+
+	OUTREG(CURSOR_A_PALETTE0, bg & CURSOR_PALETTE_MASK);
+	OUTREG(CURSOR_A_PALETTE1, fg & CURSOR_PALETTE_MASK);
+	OUTREG(CURSOR_A_PALETTE2, fg & CURSOR_PALETTE_MASK);
+	OUTREG(CURSOR_A_PALETTE3, bg & CURSOR_PALETTE_MASK);
+}
+
+void intelfbhw_cursor_load(struct intelfb_info *dinfo, int width, int height,
+			   u8 *data)
+{
+	u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
+	int i, j, w = width / 8;
+	int mod = width % 8, t_mask, d_mask;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_cursor_load\n");
+#endif
+
+	if (!dinfo->cursor.virtual)
+		return;
+
+	t_mask = 0xff >> mod;
+	d_mask = ~(0xff >> mod);
+	for (i = height; i--; ) {
+		for (j = 0; j < w; j++) {
+			writeb(0x00, addr + j);
+			writeb(*(data++), addr + j+8);
+		}
+		if (mod) {
+			writeb(t_mask, addr + j);
+			writeb(*(data++) & d_mask, addr + j+8);
+		}
+		addr += 16;
+	}
+}
+
+void intelfbhw_cursor_reset(struct intelfb_info *dinfo)
+{
+	u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
+	int i, j;
+
+#if VERBOSE > 0
+	DBG_MSG("intelfbhw_cursor_reset\n");
+#endif
+
+	if (!dinfo->cursor.virtual)
+		return;
+
+	for (i = 64; i--; ) {
+		for (j = 0; j < 8; j++) {
+			writeb(0xff, addr + j+0);
+			writeb(0x00, addr + j+8);
+		}
+		addr += 16;
+	}
+}
+
+static irqreturn_t intelfbhw_irq(int irq, void *dev_id)
+{
+	u16 tmp;
+	struct intelfb_info *dinfo = dev_id;
+
+	spin_lock(&dinfo->int_lock);
+
+	tmp = INREG16(IIR);
+	if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
+		tmp &= PIPE_A_EVENT_INTERRUPT;
+	else
+		tmp &= VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
+
+	if (tmp == 0) {
+		spin_unlock(&dinfo->int_lock);
+		return IRQ_RETVAL(0); /* not us */
+	}
+
+	/* clear status bits 0-15 ASAP and don't touch bits 16-31 */
+	OUTREG(PIPEASTAT, INREG(PIPEASTAT));
+
+	OUTREG16(IIR, tmp);
+	if (dinfo->vsync.pan_display) {
+		dinfo->vsync.pan_display = 0;
+		OUTREG(DSPABASE, dinfo->vsync.pan_offset);
+	}
+
+	dinfo->vsync.count++;
+	wake_up_interruptible(&dinfo->vsync.wait);
+
+	spin_unlock(&dinfo->int_lock);
+
+	return IRQ_RETVAL(1);
+}
+
+int intelfbhw_enable_irq(struct intelfb_info *dinfo)
+{
+	u16 tmp;
+	if (!test_and_set_bit(0, &dinfo->irq_flags)) {
+		if (request_irq(dinfo->pdev->irq, intelfbhw_irq, IRQF_SHARED,
+				"intelfb", dinfo)) {
+			clear_bit(0, &dinfo->irq_flags);
+			return -EINVAL;
+		}
+
+		spin_lock_irq(&dinfo->int_lock);
+		OUTREG16(HWSTAM, 0xfffe); /* i830 DRM uses ffff */
+		OUTREG16(IMR, 0);
+	} else
+		spin_lock_irq(&dinfo->int_lock);
+
+	if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
+		tmp = PIPE_A_EVENT_INTERRUPT;
+	else
+		tmp = VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
+	if (tmp != INREG16(IER)) {
+		DBG_MSG("changing IER to 0x%X\n", tmp);
+		OUTREG16(IER, tmp);
+	}
+
+	spin_unlock_irq(&dinfo->int_lock);
+	return 0;
+}
+
+void intelfbhw_disable_irq(struct intelfb_info *dinfo)
+{
+	if (test_and_clear_bit(0, &dinfo->irq_flags)) {
+		if (dinfo->vsync.pan_display) {
+			dinfo->vsync.pan_display = 0;
+			OUTREG(DSPABASE, dinfo->vsync.pan_offset);
+		}
+		spin_lock_irq(&dinfo->int_lock);
+		OUTREG16(HWSTAM, 0xffff);
+		OUTREG16(IMR, 0xffff);
+		OUTREG16(IER, 0x0);
+
+		OUTREG16(IIR, INREG16(IIR)); /* clear IRQ requests */
+		spin_unlock_irq(&dinfo->int_lock);
+
+		free_irq(dinfo->pdev->irq, dinfo);
+	}
+}
+
+int intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe)
+{
+	struct intelfb_vsync *vsync;
+	unsigned int count;
+	int ret;
+
+	switch (pipe) {
+		case 0:
+			vsync = &dinfo->vsync;
+			break;
+		default:
+			return -ENODEV;
+	}
+
+	ret = intelfbhw_enable_irq(dinfo);
+	if (ret)
+		return ret;
+
+	count = vsync->count;
+	ret = wait_event_interruptible_timeout(vsync->wait,
+					       count != vsync->count, HZ / 10);
+	if (ret < 0)
+		return ret;
+	if (ret == 0) {
+		DBG_MSG("wait_for_vsync timed out!\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}