DRM: i915: add mode setting support

This commit adds i915 driver support for the DRM mode setting APIs.
Currently, VGA, LVDS, SDVO DVI & VGA, TV and DVO LVDS outputs are
supported.  HDMI, DisplayPort and additional SDVO output support will
follow.

Support for the mode setting code is controlled by the new 'modeset'
module option.  A new config option, CONFIG_DRM_I915_KMS controls the
default behavior, and whether a PCI ID list is built into the module for
use by user level module utilities.

Note that if mode setting is enabled, user level drivers that access
display registers directly or that don't use the kernel graphics memory
manager will likely corrupt kernel graphics memory, disrupt output
configuration (possibly leading to hangs and/or blank displays), and
prevent panic/oops messages from appearing.  So use caution when
enabling this code; be sure your user level code supports the new
interfaces.

A new SysRq key, 'g', provides emergency support for switching back to
the kernel's framebuffer console; which is useful for testing.

Co-authors: Dave Airlie <airlied@linux.ie>, Hong Liu <hong.liu@intel.com>

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1621 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
new file mode 100644
index 00000000000..96c2da5b74e
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -0,0 +1,1621 @@
+/*
+ * Copyright © 2006-2007 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *	Eric Anholt <eric@anholt.net>
+ */
+
+#include <linux/i2c.h>
+#include "drmP.h"
+#include "intel_drv.h"
+#include "i915_drm.h"
+#include "i915_drv.h"
+
+#include "drm_crtc_helper.h"
+
+bool intel_pipe_has_type (struct drm_crtc *crtc, int type);
+
+typedef struct {
+    /* given values */
+    int n;
+    int m1, m2;
+    int p1, p2;
+    /* derived values */
+    int	dot;
+    int	vco;
+    int	m;
+    int	p;
+} intel_clock_t;
+
+typedef struct {
+    int	min, max;
+} intel_range_t;
+
+typedef struct {
+    int	dot_limit;
+    int	p2_slow, p2_fast;
+} intel_p2_t;
+
+#define INTEL_P2_NUM		      2
+
+typedef struct {
+    intel_range_t   dot, vco, n, m, m1, m2, p, p1;
+    intel_p2_t	    p2;
+} intel_limit_t;
+
+#define I8XX_DOT_MIN		  25000
+#define I8XX_DOT_MAX		 350000
+#define I8XX_VCO_MIN		 930000
+#define I8XX_VCO_MAX		1400000
+#define I8XX_N_MIN		      3
+#define I8XX_N_MAX		     16
+#define I8XX_M_MIN		     96
+#define I8XX_M_MAX		    140
+#define I8XX_M1_MIN		     18
+#define I8XX_M1_MAX		     26
+#define I8XX_M2_MIN		      6
+#define I8XX_M2_MAX		     16
+#define I8XX_P_MIN		      4
+#define I8XX_P_MAX		    128
+#define I8XX_P1_MIN		      2
+#define I8XX_P1_MAX		     33
+#define I8XX_P1_LVDS_MIN	      1
+#define I8XX_P1_LVDS_MAX	      6
+#define I8XX_P2_SLOW		      4
+#define I8XX_P2_FAST		      2
+#define I8XX_P2_LVDS_SLOW	      14
+#define I8XX_P2_LVDS_FAST	      14 /* No fast option */
+#define I8XX_P2_SLOW_LIMIT	 165000
+
+#define I9XX_DOT_MIN		  20000
+#define I9XX_DOT_MAX		 400000
+#define I9XX_VCO_MIN		1400000
+#define I9XX_VCO_MAX		2800000
+#define I9XX_N_MIN		      3
+#define I9XX_N_MAX		      8
+#define I9XX_M_MIN		     70
+#define I9XX_M_MAX		    120
+#define I9XX_M1_MIN		     10
+#define I9XX_M1_MAX		     20
+#define I9XX_M2_MIN		      5
+#define I9XX_M2_MAX		      9
+#define I9XX_P_SDVO_DAC_MIN	      5
+#define I9XX_P_SDVO_DAC_MAX	     80
+#define I9XX_P_LVDS_MIN		      7
+#define I9XX_P_LVDS_MAX		     98
+#define I9XX_P1_MIN		      1
+#define I9XX_P1_MAX		      8
+#define I9XX_P2_SDVO_DAC_SLOW		     10
+#define I9XX_P2_SDVO_DAC_FAST		      5
+#define I9XX_P2_SDVO_DAC_SLOW_LIMIT	 200000
+#define I9XX_P2_LVDS_SLOW		     14
+#define I9XX_P2_LVDS_FAST		      7
+#define I9XX_P2_LVDS_SLOW_LIMIT		 112000
+
+#define INTEL_LIMIT_I8XX_DVO_DAC    0
+#define INTEL_LIMIT_I8XX_LVDS	    1
+#define INTEL_LIMIT_I9XX_SDVO_DAC   2
+#define INTEL_LIMIT_I9XX_LVDS	    3
+
+static const intel_limit_t intel_limits[] = {
+    { /* INTEL_LIMIT_I8XX_DVO_DAC */
+        .dot = { .min = I8XX_DOT_MIN,		.max = I8XX_DOT_MAX },
+        .vco = { .min = I8XX_VCO_MIN,		.max = I8XX_VCO_MAX },
+        .n   = { .min = I8XX_N_MIN,		.max = I8XX_N_MAX },
+        .m   = { .min = I8XX_M_MIN,		.max = I8XX_M_MAX },
+        .m1  = { .min = I8XX_M1_MIN,		.max = I8XX_M1_MAX },
+        .m2  = { .min = I8XX_M2_MIN,		.max = I8XX_M2_MAX },
+        .p   = { .min = I8XX_P_MIN,		.max = I8XX_P_MAX },
+        .p1  = { .min = I8XX_P1_MIN,		.max = I8XX_P1_MAX },
+	.p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
+		 .p2_slow = I8XX_P2_SLOW,	.p2_fast = I8XX_P2_FAST },
+    },
+    { /* INTEL_LIMIT_I8XX_LVDS */
+        .dot = { .min = I8XX_DOT_MIN,		.max = I8XX_DOT_MAX },
+        .vco = { .min = I8XX_VCO_MIN,		.max = I8XX_VCO_MAX },
+        .n   = { .min = I8XX_N_MIN,		.max = I8XX_N_MAX },
+        .m   = { .min = I8XX_M_MIN,		.max = I8XX_M_MAX },
+        .m1  = { .min = I8XX_M1_MIN,		.max = I8XX_M1_MAX },
+        .m2  = { .min = I8XX_M2_MIN,		.max = I8XX_M2_MAX },
+        .p   = { .min = I8XX_P_MIN,		.max = I8XX_P_MAX },
+        .p1  = { .min = I8XX_P1_LVDS_MIN,	.max = I8XX_P1_LVDS_MAX },
+	.p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
+		 .p2_slow = I8XX_P2_LVDS_SLOW,	.p2_fast = I8XX_P2_LVDS_FAST },
+    },
+    { /* INTEL_LIMIT_I9XX_SDVO_DAC */
+        .dot = { .min = I9XX_DOT_MIN,		.max = I9XX_DOT_MAX },
+        .vco = { .min = I9XX_VCO_MIN,		.max = I9XX_VCO_MAX },
+        .n   = { .min = I9XX_N_MIN,		.max = I9XX_N_MAX },
+        .m   = { .min = I9XX_M_MIN,		.max = I9XX_M_MAX },
+        .m1  = { .min = I9XX_M1_MIN,		.max = I9XX_M1_MAX },
+        .m2  = { .min = I9XX_M2_MIN,		.max = I9XX_M2_MAX },
+        .p   = { .min = I9XX_P_SDVO_DAC_MIN,	.max = I9XX_P_SDVO_DAC_MAX },
+        .p1  = { .min = I9XX_P1_MIN,		.max = I9XX_P1_MAX },
+	.p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
+		 .p2_slow = I9XX_P2_SDVO_DAC_SLOW,	.p2_fast = I9XX_P2_SDVO_DAC_FAST },
+    },
+    { /* INTEL_LIMIT_I9XX_LVDS */
+        .dot = { .min = I9XX_DOT_MIN,		.max = I9XX_DOT_MAX },
+        .vco = { .min = I9XX_VCO_MIN,		.max = I9XX_VCO_MAX },
+        .n   = { .min = I9XX_N_MIN,		.max = I9XX_N_MAX },
+        .m   = { .min = I9XX_M_MIN,		.max = I9XX_M_MAX },
+        .m1  = { .min = I9XX_M1_MIN,		.max = I9XX_M1_MAX },
+        .m2  = { .min = I9XX_M2_MIN,		.max = I9XX_M2_MAX },
+        .p   = { .min = I9XX_P_LVDS_MIN,	.max = I9XX_P_LVDS_MAX },
+        .p1  = { .min = I9XX_P1_MIN,		.max = I9XX_P1_MAX },
+	/* The single-channel range is 25-112Mhz, and dual-channel
+	 * is 80-224Mhz.  Prefer single channel as much as possible.
+	 */
+	.p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
+		 .p2_slow = I9XX_P2_LVDS_SLOW,	.p2_fast = I9XX_P2_LVDS_FAST },
+    },
+};
+
+static const intel_limit_t *intel_limit(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	const intel_limit_t *limit;
+
+	if (IS_I9XX(dev)) {
+		if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
+			limit = &intel_limits[INTEL_LIMIT_I9XX_LVDS];
+		else
+			limit = &intel_limits[INTEL_LIMIT_I9XX_SDVO_DAC];
+	} else {
+		if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
+			limit = &intel_limits[INTEL_LIMIT_I8XX_LVDS];
+		else
+			limit = &intel_limits[INTEL_LIMIT_I8XX_DVO_DAC];
+	}
+	return limit;
+}
+
+/** Derive the pixel clock for the given refclk and divisors for 8xx chips. */
+
+static void i8xx_clock(int refclk, intel_clock_t *clock)
+{
+	clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
+	clock->p = clock->p1 * clock->p2;
+	clock->vco = refclk * clock->m / (clock->n + 2);
+	clock->dot = clock->vco / clock->p;
+}
+
+/** Derive the pixel clock for the given refclk and divisors for 9xx chips. */
+
+static void i9xx_clock(int refclk, intel_clock_t *clock)
+{
+	clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
+	clock->p = clock->p1 * clock->p2;
+	clock->vco = refclk * clock->m / (clock->n + 2);
+	clock->dot = clock->vco / clock->p;
+}
+
+static void intel_clock(struct drm_device *dev, int refclk,
+			intel_clock_t *clock)
+{
+	if (IS_I9XX(dev))
+		return i9xx_clock (refclk, clock);
+	else
+		return i8xx_clock (refclk, clock);
+}
+
+/**
+ * Returns whether any output on the specified pipe is of the specified type
+ */
+bool intel_pipe_has_type (struct drm_crtc *crtc, int type)
+{
+    struct drm_device *dev = crtc->dev;
+    struct drm_mode_config *mode_config = &dev->mode_config;
+    struct drm_connector *l_entry;
+
+    list_for_each_entry(l_entry, &mode_config->connector_list, head) {
+	    if (l_entry->encoder &&
+	        l_entry->encoder->crtc == crtc) {
+		    struct intel_output *intel_output = to_intel_output(l_entry);
+		    if (intel_output->type == type)
+			    return true;
+	    }
+    }
+    return false;
+}
+
+#define INTELPllInvalid(s)   { /* ErrorF (s) */; return false; }
+/**
+ * Returns whether the given set of divisors are valid for a given refclk with
+ * the given connectors.
+ */
+
+static bool intel_PLL_is_valid(struct drm_crtc *crtc, intel_clock_t *clock)
+{
+	const intel_limit_t *limit = intel_limit (crtc);
+
+	if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
+		INTELPllInvalid ("p1 out of range\n");
+	if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
+		INTELPllInvalid ("p out of range\n");
+	if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
+		INTELPllInvalid ("m2 out of range\n");
+	if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
+		INTELPllInvalid ("m1 out of range\n");
+	if (clock->m1 <= clock->m2)
+		INTELPllInvalid ("m1 <= m2\n");
+	if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
+		INTELPllInvalid ("m out of range\n");
+	if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
+		INTELPllInvalid ("n out of range\n");
+	if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
+		INTELPllInvalid ("vco out of range\n");
+	/* XXX: We may need to be checking "Dot clock" depending on the multiplier,
+	 * connector, etc., rather than just a single range.
+	 */
+	if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
+		INTELPllInvalid ("dot out of range\n");
+
+	return true;
+}
+
+/**
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE.  The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ */
+static bool intel_find_best_PLL(struct drm_crtc *crtc, int target,
+				int refclk, intel_clock_t *best_clock)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	intel_clock_t clock;
+	const intel_limit_t *limit = intel_limit(crtc);
+	int err = target;
+
+	if (IS_I9XX(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
+	    (I915_READ(LVDS) & LVDS_PORT_EN) != 0) {
+		/*
+		 * For LVDS, if the panel is on, just rely on its current
+		 * settings for dual-channel.  We haven't figured out how to
+		 * reliably set up different single/dual channel state, if we
+		 * even can.
+		 */
+		if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
+		    LVDS_CLKB_POWER_UP)
+			clock.p2 = limit->p2.p2_fast;
+		else
+			clock.p2 = limit->p2.p2_slow;
+	} else {
+		if (target < limit->p2.dot_limit)
+			clock.p2 = limit->p2.p2_slow;
+		else
+			clock.p2 = limit->p2.p2_fast;
+	}
+
+	memset (best_clock, 0, sizeof (*best_clock));
+
+	for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
+		for (clock.m2 = limit->m2.min; clock.m2 < clock.m1 &&
+			     clock.m2 <= limit->m2.max; clock.m2++) {
+			for (clock.n = limit->n.min; clock.n <= limit->n.max;
+			     clock.n++) {
+				for (clock.p1 = limit->p1.min;
+				     clock.p1 <= limit->p1.max; clock.p1++) {
+					int this_err;
+
+					intel_clock(dev, refclk, &clock);
+
+					if (!intel_PLL_is_valid(crtc, &clock))
+						continue;
+
+					this_err = abs(clock.dot - target);
+					if (this_err < err) {
+						*best_clock = clock;
+						err = this_err;
+					}
+				}
+			}
+		}
+	}
+
+	return (err != target);
+}
+
+void
+intel_wait_for_vblank(struct drm_device *dev)
+{
+	/* Wait for 20ms, i.e. one cycle at 50hz. */
+	udelay(20000);
+}
+
+void
+intel_pipe_set_base(struct drm_crtc *crtc, int x, int y)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_master_private *master_priv;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_framebuffer *intel_fb;
+	struct drm_i915_gem_object *obj_priv;
+	struct drm_gem_object *obj;
+	int pipe = intel_crtc->pipe;
+	unsigned long Start, Offset;
+	int dspbase = (pipe == 0 ? DSPAADDR : DSPBADDR);
+	int dspsurf = (pipe == 0 ? DSPASURF : DSPBSURF);
+	int dspstride = (pipe == 0) ? DSPASTRIDE : DSPBSTRIDE;
+	int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
+	u32 dspcntr;
+
+	/* no fb bound */
+	if (!crtc->fb) {
+		DRM_DEBUG("No FB bound\n");
+		return;
+	}
+
+	intel_fb = to_intel_framebuffer(crtc->fb);
+
+	obj = intel_fb->obj;
+	obj_priv = obj->driver_private;
+
+	Start = obj_priv->gtt_offset;
+	Offset = y * crtc->fb->pitch + x * (crtc->fb->bits_per_pixel / 8);
+
+	I915_WRITE(dspstride, crtc->fb->pitch);
+
+	dspcntr = I915_READ(dspcntr_reg);
+	switch (crtc->fb->bits_per_pixel) {
+	case 8:
+		dspcntr |= DISPPLANE_8BPP;
+		break;
+	case 16:
+		if (crtc->fb->depth == 15)
+			dspcntr |= DISPPLANE_15_16BPP;
+		else
+			dspcntr |= DISPPLANE_16BPP;
+		break;
+	case 24:
+	case 32:
+		dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
+		break;
+	default:
+		DRM_ERROR("Unknown color depth\n");
+		return;
+	}
+	I915_WRITE(dspcntr_reg, dspcntr);
+
+	DRM_DEBUG("Writing base %08lX %08lX %d %d\n", Start, Offset, x, y);
+	if (IS_I965G(dev)) {
+		I915_WRITE(dspbase, Offset);
+		I915_READ(dspbase);
+		I915_WRITE(dspsurf, Start);
+		I915_READ(dspsurf);
+	} else {
+		I915_WRITE(dspbase, Start + Offset);
+		I915_READ(dspbase);
+	}
+
+
+	if (!dev->primary->master)
+		return;
+
+	master_priv = dev->primary->master->driver_priv;
+	if (!master_priv->sarea_priv)
+		return;
+
+	switch (pipe) {
+	case 0:
+		master_priv->sarea_priv->pipeA_x = x;
+		master_priv->sarea_priv->pipeA_y = y;
+		break;
+	case 1:
+		master_priv->sarea_priv->pipeB_x = x;
+		master_priv->sarea_priv->pipeB_y = y;
+		break;
+	default:
+		DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
+		break;
+	}
+}
+
+
+
+/**
+ * Sets the power management mode of the pipe and plane.
+ *
+ * This code should probably grow support for turning the cursor off and back
+ * on appropriately at the same time as we're turning the pipe off/on.
+ */
+static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_master_private *master_priv;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
+	int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
+	int dspbase_reg = (pipe == 0) ? DSPAADDR : DSPBADDR;
+	int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
+	u32 temp;
+	bool enabled;
+
+	/* XXX: When our outputs are all unaware of DPMS modes other than off
+	 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
+	 */
+	switch (mode) {
+	case DRM_MODE_DPMS_ON:
+	case DRM_MODE_DPMS_STANDBY:
+	case DRM_MODE_DPMS_SUSPEND:
+		/* Enable the DPLL */
+		temp = I915_READ(dpll_reg);
+		if ((temp & DPLL_VCO_ENABLE) == 0) {
+			I915_WRITE(dpll_reg, temp);
+			I915_READ(dpll_reg);
+			/* Wait for the clocks to stabilize. */
+			udelay(150);
+			I915_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
+			I915_READ(dpll_reg);
+			/* Wait for the clocks to stabilize. */
+			udelay(150);
+			I915_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
+			I915_READ(dpll_reg);
+			/* Wait for the clocks to stabilize. */
+			udelay(150);
+		}
+
+		/* Enable the pipe */
+		temp = I915_READ(pipeconf_reg);
+		if ((temp & PIPEACONF_ENABLE) == 0)
+			I915_WRITE(pipeconf_reg, temp | PIPEACONF_ENABLE);
+
+		/* Enable the plane */
+		temp = I915_READ(dspcntr_reg);
+		if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
+			I915_WRITE(dspcntr_reg, temp | DISPLAY_PLANE_ENABLE);
+			/* Flush the plane changes */
+			I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
+		}
+
+		intel_crtc_load_lut(crtc);
+
+		/* Give the overlay scaler a chance to enable if it's on this pipe */
+		//intel_crtc_dpms_video(crtc, true); TODO
+	break;
+	case DRM_MODE_DPMS_OFF:
+		/* Give the overlay scaler a chance to disable if it's on this pipe */
+		//intel_crtc_dpms_video(crtc, FALSE); TODO
+
+		/* Disable the VGA plane that we never use */
+		I915_WRITE(VGACNTRL, VGA_DISP_DISABLE);
+
+		/* Disable display plane */
+		temp = I915_READ(dspcntr_reg);
+		if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
+			I915_WRITE(dspcntr_reg, temp & ~DISPLAY_PLANE_ENABLE);
+			/* Flush the plane changes */
+			I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
+			I915_READ(dspbase_reg);
+		}
+
+		if (!IS_I9XX(dev)) {
+			/* Wait for vblank for the disable to take effect */
+			intel_wait_for_vblank(dev);
+		}
+
+		/* Next, disable display pipes */
+		temp = I915_READ(pipeconf_reg);
+		if ((temp & PIPEACONF_ENABLE) != 0) {
+			I915_WRITE(pipeconf_reg, temp & ~PIPEACONF_ENABLE);
+			I915_READ(pipeconf_reg);
+		}
+
+		/* Wait for vblank for the disable to take effect. */
+		intel_wait_for_vblank(dev);
+
+		temp = I915_READ(dpll_reg);
+		if ((temp & DPLL_VCO_ENABLE) != 0) {
+			I915_WRITE(dpll_reg, temp & ~DPLL_VCO_ENABLE);
+			I915_READ(dpll_reg);
+		}
+
+		/* Wait for the clocks to turn off. */
+		udelay(150);
+		break;
+	}
+
+	if (!dev->primary->master)
+		return;
+
+	master_priv = dev->primary->master->driver_priv;
+	if (!master_priv->sarea_priv)
+		return;
+
+	enabled = crtc->enabled && mode != DRM_MODE_DPMS_OFF;
+
+	switch (pipe) {
+	case 0:
+		master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
+		master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
+		break;
+	case 1:
+		master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
+		master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
+		break;
+	default:
+		DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
+		break;
+	}
+
+	intel_crtc->dpms_mode = mode;
+}
+
+static void intel_crtc_prepare (struct drm_crtc *crtc)
+{
+	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
+}
+
+static void intel_crtc_commit (struct drm_crtc *crtc)
+{
+	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
+}
+
+void intel_encoder_prepare (struct drm_encoder *encoder)
+{
+	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
+	/* lvds has its own version of prepare see intel_lvds_prepare */
+	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
+}
+
+void intel_encoder_commit (struct drm_encoder *encoder)
+{
+	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
+	/* lvds has its own version of commit see intel_lvds_commit */
+	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
+}
+
+static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
+				  struct drm_display_mode *mode,
+				  struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+
+
+/** Returns the core display clock speed for i830 - i945 */
+static int intel_get_core_clock_speed(struct drm_device *dev)
+{
+
+	/* Core clock values taken from the published datasheets.
+	 * The 830 may go up to 166 Mhz, which we should check.
+	 */
+	if (IS_I945G(dev))
+		return 400000;
+	else if (IS_I915G(dev))
+		return 333000;
+	else if (IS_I945GM(dev) || IS_845G(dev))
+		return 200000;
+	else if (IS_I915GM(dev)) {
+		u16 gcfgc = 0;
+
+		pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
+
+		if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
+			return 133000;
+		else {
+			switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+			case GC_DISPLAY_CLOCK_333_MHZ:
+				return 333000;
+			default:
+			case GC_DISPLAY_CLOCK_190_200_MHZ:
+				return 190000;
+			}
+		}
+	} else if (IS_I865G(dev))
+		return 266000;
+	else if (IS_I855(dev)) {
+		u16 hpllcc = 0;
+		/* Assume that the hardware is in the high speed state.  This
+		 * should be the default.
+		 */
+		switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
+		case GC_CLOCK_133_200:
+		case GC_CLOCK_100_200:
+			return 200000;
+		case GC_CLOCK_166_250:
+			return 250000;
+		case GC_CLOCK_100_133:
+			return 133000;
+		}
+	} else /* 852, 830 */
+		return 133000;
+
+	return 0; /* Silence gcc warning */
+}
+
+
+/**
+ * Return the pipe currently connected to the panel fitter,
+ * or -1 if the panel fitter is not present or not in use
+ */
+static int intel_panel_fitter_pipe (struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32  pfit_control;
+
+	/* i830 doesn't have a panel fitter */
+	if (IS_I830(dev))
+		return -1;
+
+	pfit_control = I915_READ(PFIT_CONTROL);
+
+	/* See if the panel fitter is in use */
+	if ((pfit_control & PFIT_ENABLE) == 0)
+		return -1;
+
+	/* 965 can place panel fitter on either pipe */
+	if (IS_I965G(dev))
+		return (pfit_control >> 29) & 0x3;
+
+	/* older chips can only use pipe 1 */
+	return 1;
+}
+
+static void intel_crtc_mode_set(struct drm_crtc *crtc,
+				struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode,
+				int x, int y)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	int fp_reg = (pipe == 0) ? FPA0 : FPB0;
+	int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
+	int dpll_md_reg = (intel_crtc->pipe == 0) ? DPLL_A_MD : DPLL_B_MD;
+	int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
+	int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
+	int htot_reg = (pipe == 0) ? HTOTAL_A : HTOTAL_B;
+	int hblank_reg = (pipe == 0) ? HBLANK_A : HBLANK_B;
+	int hsync_reg = (pipe == 0) ? HSYNC_A : HSYNC_B;
+	int vtot_reg = (pipe == 0) ? VTOTAL_A : VTOTAL_B;
+	int vblank_reg = (pipe == 0) ? VBLANK_A : VBLANK_B;
+	int vsync_reg = (pipe == 0) ? VSYNC_A : VSYNC_B;
+	int dspsize_reg = (pipe == 0) ? DSPASIZE : DSPBSIZE;
+	int dsppos_reg = (pipe == 0) ? DSPAPOS : DSPBPOS;
+	int pipesrc_reg = (pipe == 0) ? PIPEASRC : PIPEBSRC;
+	int refclk;
+	intel_clock_t clock;
+	u32 dpll = 0, fp = 0, dspcntr, pipeconf;
+	bool ok, is_sdvo = false, is_dvo = false;
+	bool is_crt = false, is_lvds = false, is_tv = false;
+	struct drm_mode_config *mode_config = &dev->mode_config;
+	struct drm_connector *connector;
+
+	drm_vblank_pre_modeset(dev, pipe);
+
+	list_for_each_entry(connector, &mode_config->connector_list, head) {
+		struct intel_output *intel_output = to_intel_output(connector);
+
+		if (!connector->encoder || connector->encoder->crtc != crtc)
+			continue;
+
+		switch (intel_output->type) {
+		case INTEL_OUTPUT_LVDS:
+			is_lvds = true;
+			break;
+		case INTEL_OUTPUT_SDVO:
+			is_sdvo = true;
+			break;
+		case INTEL_OUTPUT_DVO:
+			is_dvo = true;
+			break;
+		case INTEL_OUTPUT_TVOUT:
+			is_tv = true;
+			break;
+		case INTEL_OUTPUT_ANALOG:
+			is_crt = true;
+			break;
+		}
+	}
+
+	if (IS_I9XX(dev)) {
+		refclk = 96000;
+	} else {
+		refclk = 48000;
+	}
+
+	ok = intel_find_best_PLL(crtc, adjusted_mode->clock, refclk, &clock);
+	if (!ok) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return;
+	}
+
+	fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
+
+	dpll = DPLL_VGA_MODE_DIS;
+	if (IS_I9XX(dev)) {
+		if (is_lvds)
+			dpll |= DPLLB_MODE_LVDS;
+		else
+			dpll |= DPLLB_MODE_DAC_SERIAL;
+		if (is_sdvo) {
+			dpll |= DPLL_DVO_HIGH_SPEED;
+			if (IS_I945G(dev) || IS_I945GM(dev)) {
+				int sdvo_pixel_multiply = adjusted_mode->clock / mode->clock;
+				dpll |= (sdvo_pixel_multiply - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
+			}
+		}
+
+		/* compute bitmask from p1 value */
+		dpll |= (1 << (clock.p1 - 1)) << 16;
+		switch (clock.p2) {
+		case 5:
+			dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
+			break;
+		case 7:
+			dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
+			break;
+		case 10:
+			dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
+			break;
+		case 14:
+			dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
+			break;
+		}
+		if (IS_I965G(dev))
+			dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
+	} else {
+		if (is_lvds) {
+			dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+		} else {
+			if (clock.p1 == 2)
+				dpll |= PLL_P1_DIVIDE_BY_TWO;
+			else
+				dpll |= (clock.p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+			if (clock.p2 == 4)
+				dpll |= PLL_P2_DIVIDE_BY_4;
+		}
+	}
+
+	if (is_tv) {
+		/* XXX: just matching BIOS for now */
+/*	dpll |= PLL_REF_INPUT_TVCLKINBC; */
+		dpll |= 3;
+	}
+	else
+		dpll |= PLL_REF_INPUT_DREFCLK;
+
+	/* setup pipeconf */
+	pipeconf = I915_READ(pipeconf_reg);
+
+	/* Set up the display plane register */
+	dspcntr = DISPPLANE_GAMMA_ENABLE;
+
+	if (pipe == 0)
+		dspcntr |= DISPPLANE_SEL_PIPE_A;
+	else
+		dspcntr |= DISPPLANE_SEL_PIPE_B;
+
+	if (pipe == 0 && !IS_I965G(dev)) {
+		/* Enable pixel doubling when the dot clock is > 90% of the (display)
+		 * core speed.
+		 *
+		 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
+		 * pipe == 0 check?
+		 */
+		if (mode->clock > intel_get_core_clock_speed(dev) * 9 / 10)
+			pipeconf |= PIPEACONF_DOUBLE_WIDE;
+		else
+			pipeconf &= ~PIPEACONF_DOUBLE_WIDE;
+	}
+
+	dspcntr |= DISPLAY_PLANE_ENABLE;
+	pipeconf |= PIPEACONF_ENABLE;
+	dpll |= DPLL_VCO_ENABLE;
+
+
+	/* Disable the panel fitter if it was on our pipe */
+	if (intel_panel_fitter_pipe(dev) == pipe)
+		I915_WRITE(PFIT_CONTROL, 0);
+
+	DRM_DEBUG("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
+	drm_mode_debug_printmodeline(mode);
+
+
+	if (dpll & DPLL_VCO_ENABLE) {
+		I915_WRITE(fp_reg, fp);
+		I915_WRITE(dpll_reg, dpll & ~DPLL_VCO_ENABLE);
+		I915_READ(dpll_reg);
+		udelay(150);
+	}
+
+	/* The LVDS pin pair needs to be on before the DPLLs are enabled.
+	 * This is an exception to the general rule that mode_set doesn't turn
+	 * things on.
+	 */
+	if (is_lvds) {
+		u32 lvds = I915_READ(LVDS);
+
+		lvds |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP | LVDS_PIPEB_SELECT;
+		/* Set the B0-B3 data pairs corresponding to whether we're going to
+		 * set the DPLLs for dual-channel mode or not.
+		 */
+		if (clock.p2 == 7)
+			lvds |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
+		else
+			lvds &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
+
+		/* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
+		 * appropriately here, but we need to look more thoroughly into how
+		 * panels behave in the two modes.
+		 */
+
+		I915_WRITE(LVDS, lvds);
+		I915_READ(LVDS);
+	}
+
+	I915_WRITE(fp_reg, fp);
+	I915_WRITE(dpll_reg, dpll);
+	I915_READ(dpll_reg);
+	/* Wait for the clocks to stabilize. */
+	udelay(150);
+
+	if (IS_I965G(dev)) {
+		int sdvo_pixel_multiply = adjusted_mode->clock / mode->clock;
+		I915_WRITE(dpll_md_reg, (0 << DPLL_MD_UDI_DIVIDER_SHIFT) |
+			   ((sdvo_pixel_multiply - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT));
+	} else {
+		/* write it again -- the BIOS does, after all */
+		I915_WRITE(dpll_reg, dpll);
+	}
+	I915_READ(dpll_reg);
+	/* Wait for the clocks to stabilize. */
+	udelay(150);
+
+	I915_WRITE(htot_reg, (adjusted_mode->crtc_hdisplay - 1) |
+		   ((adjusted_mode->crtc_htotal - 1) << 16));
+	I915_WRITE(hblank_reg, (adjusted_mode->crtc_hblank_start - 1) |
+		   ((adjusted_mode->crtc_hblank_end - 1) << 16));
+	I915_WRITE(hsync_reg, (adjusted_mode->crtc_hsync_start - 1) |
+		   ((adjusted_mode->crtc_hsync_end - 1) << 16));
+	I915_WRITE(vtot_reg, (adjusted_mode->crtc_vdisplay - 1) |
+		   ((adjusted_mode->crtc_vtotal - 1) << 16));
+	I915_WRITE(vblank_reg, (adjusted_mode->crtc_vblank_start - 1) |
+		   ((adjusted_mode->crtc_vblank_end - 1) << 16));
+	I915_WRITE(vsync_reg, (adjusted_mode->crtc_vsync_start - 1) |
+		   ((adjusted_mode->crtc_vsync_end - 1) << 16));
+	/* pipesrc and dspsize control the size that is scaled from, which should
+	 * always be the user's requested size.
+	 */
+	I915_WRITE(dspsize_reg, ((mode->vdisplay - 1) << 16) | (mode->hdisplay - 1));
+	I915_WRITE(dsppos_reg, 0);
+	I915_WRITE(pipesrc_reg, ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
+	I915_WRITE(pipeconf_reg, pipeconf);
+	I915_READ(pipeconf_reg);
+
+	intel_wait_for_vblank(dev);
+
+	I915_WRITE(dspcntr_reg, dspcntr);
+
+	/* Flush the plane changes */
+	intel_pipe_set_base(crtc, x, y);
+
+	intel_wait_for_vblank(dev);
+
+	drm_vblank_post_modeset(dev, pipe);
+}
+
+/** Loads the palette/gamma unit for the CRTC with the prepared values */
+void intel_crtc_load_lut(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int palreg = (intel_crtc->pipe == 0) ? PALETTE_A : PALETTE_B;
+	int i;
+
+	/* The clocks have to be on to load the palette. */
+	if (!crtc->enabled)
+		return;
+
+	for (i = 0; i < 256; i++) {
+		I915_WRITE(palreg + 4 * i,
+			   (intel_crtc->lut_r[i] << 16) |
+			   (intel_crtc->lut_g[i] << 8) |
+			   intel_crtc->lut_b[i]);
+	}
+}
+
+static int intel_crtc_cursor_set(struct drm_crtc *crtc,
+				 struct drm_file *file_priv,
+				 uint32_t handle,
+				 uint32_t width, uint32_t height)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct drm_gem_object *bo;
+	struct drm_i915_gem_object *obj_priv;
+	int pipe = intel_crtc->pipe;
+	uint32_t control = (pipe == 0) ? CURACNTR : CURBCNTR;
+	uint32_t base = (pipe == 0) ? CURABASE : CURBBASE;
+	uint32_t temp;
+	size_t addr;
+
+	DRM_DEBUG("\n");
+
+	/* if we want to turn off the cursor ignore width and height */
+	if (!handle) {
+		DRM_DEBUG("cursor off\n");
+		/* turn of the cursor */
+		temp = 0;
+		temp |= CURSOR_MODE_DISABLE;
+
+		I915_WRITE(control, temp);
+		I915_WRITE(base, 0);
+		return 0;
+	}
+
+	/* Currently we only support 64x64 cursors */
+	if (width != 64 || height != 64) {
+		DRM_ERROR("we currently only support 64x64 cursors\n");
+		return -EINVAL;
+	}
+
+	bo = drm_gem_object_lookup(dev, file_priv, handle);
+	if (!bo)
+		return -ENOENT;
+
+	obj_priv = bo->driver_private;
+
+	if (bo->size < width * height * 4) {
+		DRM_ERROR("buffer is to small\n");
+		drm_gem_object_unreference(bo);
+		return -ENOMEM;
+	}
+
+	if (dev_priv->cursor_needs_physical) {
+		addr = dev->agp->base + obj_priv->gtt_offset;
+	} else {
+		addr = obj_priv->gtt_offset;
+	}
+
+	intel_crtc->cursor_addr = addr;
+	temp = 0;
+	/* set the pipe for the cursor */
+	temp |= (pipe << 28);
+	temp |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
+
+	I915_WRITE(control, temp);
+	I915_WRITE(base, addr);
+
+	return 0;
+}
+
+static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	uint32_t temp = 0;
+	uint32_t adder;
+
+	if (x < 0) {
+		temp |= (CURSOR_POS_SIGN << CURSOR_X_SHIFT);
+		x = -x;
+	}
+	if (y < 0) {
+		temp |= (CURSOR_POS_SIGN << CURSOR_Y_SHIFT);
+		y = -y;
+	}
+
+	temp |= ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT);
+	temp |= ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
+
+	adder = intel_crtc->cursor_addr;
+	I915_WRITE((pipe == 0) ? CURAPOS : CURBPOS, temp);
+	I915_WRITE((pipe == 0) ? CURABASE : CURBBASE, adder);
+
+	return 0;
+}
+
+/** Sets the color ramps on behalf of RandR */
+void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
+				 u16 blue, int regno)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	intel_crtc->lut_r[regno] = red >> 8;
+	intel_crtc->lut_g[regno] = green >> 8;
+	intel_crtc->lut_b[regno] = blue >> 8;
+}
+
+static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
+				 u16 *blue, uint32_t size)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int i;
+
+	if (size != 256)
+		return;
+
+	for (i = 0; i < 256; i++) {
+		intel_crtc->lut_r[i] = red[i] >> 8;
+		intel_crtc->lut_g[i] = green[i] >> 8;
+		intel_crtc->lut_b[i] = blue[i] >> 8;
+	}
+
+	intel_crtc_load_lut(crtc);
+}
+
+/**
+ * Get a pipe with a simple mode set on it for doing load-based monitor
+ * detection.
+ *
+ * It will be up to the load-detect code to adjust the pipe as appropriate for
+ * its requirements.  The pipe will be connected to no other outputs.
+ *
+ * Currently this code will only succeed if there is a pipe with no outputs
+ * configured for it.  In the future, it could choose to temporarily disable
+ * some outputs to free up a pipe for its use.
+ *
+ * \return crtc, or NULL if no pipes are available.
+ */
+
+/* VESA 640x480x72Hz mode to set on the pipe */
+static struct drm_display_mode load_detect_mode = {
+	DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
+		 704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
+};
+
+struct drm_crtc *intel_get_load_detect_pipe(struct intel_output *intel_output,
+					    struct drm_display_mode *mode,
+					    int *dpms_mode)
+{
+	struct intel_crtc *intel_crtc;
+	struct drm_crtc *possible_crtc;
+	struct drm_crtc *supported_crtc =NULL;
+	struct drm_encoder *encoder = &intel_output->enc;
+	struct drm_crtc *crtc = NULL;
+	struct drm_device *dev = encoder->dev;
+	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
+	struct drm_crtc_helper_funcs *crtc_funcs;
+	int i = -1;
+
+	/*
+	 * Algorithm gets a little messy:
+	 *   - if the connector already has an assigned crtc, use it (but make
+	 *     sure it's on first)
+	 *   - try to find the first unused crtc that can drive this connector,
+	 *     and use that if we find one
+	 *   - if there are no unused crtcs available, try to use the first
+	 *     one we found that supports the connector
+	 */
+
+	/* See if we already have a CRTC for this connector */
+	if (encoder->crtc) {
+		crtc = encoder->crtc;
+		/* Make sure the crtc and connector are running */
+		intel_crtc = to_intel_crtc(crtc);
+		*dpms_mode = intel_crtc->dpms_mode;
+		if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
+			crtc_funcs = crtc->helper_private;
+			crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
+			encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
+		}
+		return crtc;
+	}
+
+	/* Find an unused one (if possible) */
+	list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
+		i++;
+		if (!(encoder->possible_crtcs & (1 << i)))
+			continue;
+		if (!possible_crtc->enabled) {
+			crtc = possible_crtc;
+			break;
+		}
+		if (!supported_crtc)
+			supported_crtc = possible_crtc;
+	}
+
+	/*
+	 * If we didn't find an unused CRTC, don't use any.
+	 */
+	if (!crtc) {
+		return NULL;
+	}
+
+	encoder->crtc = crtc;
+	intel_output->load_detect_temp = true;
+
+	intel_crtc = to_intel_crtc(crtc);
+	*dpms_mode = intel_crtc->dpms_mode;
+
+	if (!crtc->enabled) {
+		if (!mode)
+			mode = &load_detect_mode;
+		drm_crtc_helper_set_mode(crtc, mode, 0, 0);
+	} else {
+		if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
+			crtc_funcs = crtc->helper_private;
+			crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
+		}
+
+		/* Add this connector to the crtc */
+		encoder_funcs->mode_set(encoder, &crtc->mode, &crtc->mode);
+		encoder_funcs->commit(encoder);
+	}
+	/* let the connector get through one full cycle before testing */
+	intel_wait_for_vblank(dev);
+
+	return crtc;
+}
+
+void intel_release_load_detect_pipe(struct intel_output *intel_output, int dpms_mode)
+{
+	struct drm_encoder *encoder = &intel_output->enc;
+	struct drm_device *dev = encoder->dev;
+	struct drm_crtc *crtc = encoder->crtc;
+	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
+	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+
+	if (intel_output->load_detect_temp) {
+		encoder->crtc = NULL;
+		intel_output->load_detect_temp = false;
+		crtc->enabled = drm_helper_crtc_in_use(crtc);
+		drm_helper_disable_unused_functions(dev);
+	}
+
+	/* Switch crtc and output back off if necessary */
+	if (crtc->enabled && dpms_mode != DRM_MODE_DPMS_ON) {
+		if (encoder->crtc == crtc)
+			encoder_funcs->dpms(encoder, dpms_mode);
+		crtc_funcs->dpms(crtc, dpms_mode);
+	}
+}
+
+/* Returns the clock of the currently programmed mode of the given pipe. */
+static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	u32 dpll = I915_READ((pipe == 0) ? DPLL_A : DPLL_B);
+	u32 fp;
+	intel_clock_t clock;
+
+	if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
+		fp = I915_READ((pipe == 0) ? FPA0 : FPB0);
+	else
+		fp = I915_READ((pipe == 0) ? FPA1 : FPB1);
+
+	clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
+	clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
+	clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
+	if (IS_I9XX(dev)) {
+		clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
+			       DPLL_FPA01_P1_POST_DIV_SHIFT);
+
+		switch (dpll & DPLL_MODE_MASK) {
+		case DPLLB_MODE_DAC_SERIAL:
+			clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
+				5 : 10;
+			break;
+		case DPLLB_MODE_LVDS:
+			clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
+				7 : 14;
+			break;
+		default:
+			DRM_DEBUG("Unknown DPLL mode %08x in programmed "
+				  "mode\n", (int)(dpll & DPLL_MODE_MASK));
+			return 0;
+		}
+
+		/* XXX: Handle the 100Mhz refclk */
+		i9xx_clock(96000, &clock);
+	} else {
+		bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
+
+		if (is_lvds) {
+			clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
+				       DPLL_FPA01_P1_POST_DIV_SHIFT);
+			clock.p2 = 14;
+
+			if ((dpll & PLL_REF_INPUT_MASK) ==
+			    PLLB_REF_INPUT_SPREADSPECTRUMIN) {
+				/* XXX: might not be 66MHz */
+				i8xx_clock(66000, &clock);
+			} else
+				i8xx_clock(48000, &clock);
+		} else {
+			if (dpll & PLL_P1_DIVIDE_BY_TWO)
+				clock.p1 = 2;
+			else {
+				clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
+					    DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
+			}
+			if (dpll & PLL_P2_DIVIDE_BY_4)
+				clock.p2 = 4;
+			else
+				clock.p2 = 2;
+
+			i8xx_clock(48000, &clock);
+		}
+	}
+
+	/* XXX: It would be nice to validate the clocks, but we can't reuse
+	 * i830PllIsValid() because it relies on the xf86_config connector
+	 * configuration being accurate, which it isn't necessarily.
+	 */
+
+	return clock.dot;
+}
+
+/** Returns the currently programmed mode of the given pipe. */
+struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
+					     struct drm_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	struct drm_display_mode *mode;
+	int htot = I915_READ((pipe == 0) ? HTOTAL_A : HTOTAL_B);
+	int hsync = I915_READ((pipe == 0) ? HSYNC_A : HSYNC_B);
+	int vtot = I915_READ((pipe == 0) ? VTOTAL_A : VTOTAL_B);
+	int vsync = I915_READ((pipe == 0) ? VSYNC_A : VSYNC_B);
+
+	mode = kzalloc(sizeof(*mode), GFP_KERNEL);
+	if (!mode)
+		return NULL;
+
+	mode->clock = intel_crtc_clock_get(dev, crtc);
+	mode->hdisplay = (htot & 0xffff) + 1;
+	mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
+	mode->hsync_start = (hsync & 0xffff) + 1;
+	mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
+	mode->vdisplay = (vtot & 0xffff) + 1;
+	mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
+	mode->vsync_start = (vsync & 0xffff) + 1;
+	mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
+
+	drm_mode_set_name(mode);
+	drm_mode_set_crtcinfo(mode, 0);
+
+	return mode;
+}
+
+static void intel_crtc_destroy(struct drm_crtc *crtc)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	drm_crtc_cleanup(crtc);
+	kfree(intel_crtc);
+}
+
+static const struct drm_crtc_helper_funcs intel_helper_funcs = {
+	.dpms = intel_crtc_dpms,
+	.mode_fixup = intel_crtc_mode_fixup,
+	.mode_set = intel_crtc_mode_set,
+	.mode_set_base = intel_pipe_set_base,
+	.prepare = intel_crtc_prepare,
+	.commit = intel_crtc_commit,
+};
+
+static const struct drm_crtc_funcs intel_crtc_funcs = {
+	.cursor_set = intel_crtc_cursor_set,
+	.cursor_move = intel_crtc_cursor_move,
+	.gamma_set = intel_crtc_gamma_set,
+	.set_config = drm_crtc_helper_set_config,
+	.destroy = intel_crtc_destroy,
+};
+
+
+void intel_crtc_init(struct drm_device *dev, int pipe)
+{
+	struct intel_crtc *intel_crtc;
+	int i;
+
+	intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
+	if (intel_crtc == NULL)
+		return;
+
+	drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
+
+	drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
+	intel_crtc->pipe = pipe;
+	for (i = 0; i < 256; i++) {
+		intel_crtc->lut_r[i] = i;
+		intel_crtc->lut_g[i] = i;
+		intel_crtc->lut_b[i] = i;
+	}
+
+	intel_crtc->cursor_addr = 0;
+	intel_crtc->dpms_mode = DRM_MODE_DPMS_OFF;
+	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
+
+	intel_crtc->mode_set.crtc = &intel_crtc->base;
+	intel_crtc->mode_set.connectors = (struct drm_connector **)(intel_crtc + 1);
+	intel_crtc->mode_set.num_connectors = 0;
+
+	if (i915_fbpercrtc) {
+
+
+
+	}
+}
+
+struct drm_crtc *intel_get_crtc_from_pipe(struct drm_device *dev, int pipe)
+{
+	struct drm_crtc *crtc = NULL;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+		if (intel_crtc->pipe == pipe)
+			break;
+	}
+	return crtc;
+}
+
+int intel_connector_clones(struct drm_device *dev, int type_mask)
+{
+	int index_mask = 0;
+	struct drm_connector *connector;
+	int entry = 0;
+
+        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		struct intel_output *intel_output = to_intel_output(connector);
+		if (type_mask & (1 << intel_output->type))
+			index_mask |= (1 << entry);
+		entry++;
+	}
+	return index_mask;
+}
+
+
+static void intel_setup_outputs(struct drm_device *dev)
+{
+	struct drm_connector *connector;
+
+	intel_crt_init(dev);
+
+	/* Set up integrated LVDS */
+	if (IS_MOBILE(dev) && !IS_I830(dev))
+		intel_lvds_init(dev);
+
+	if (IS_I9XX(dev)) {
+		intel_sdvo_init(dev, SDVOB);
+		intel_sdvo_init(dev, SDVOC);
+	} else
+		intel_dvo_init(dev);
+
+	if (IS_I9XX(dev) && !IS_I915G(dev))
+		intel_tv_init(dev);
+
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		struct intel_output *intel_output = to_intel_output(connector);
+		struct drm_encoder *encoder = &intel_output->enc;
+		int crtc_mask = 0, clone_mask = 0;
+
+		/* valid crtcs */
+		switch(intel_output->type) {
+		case INTEL_OUTPUT_DVO:
+		case INTEL_OUTPUT_SDVO:
+			crtc_mask = ((1 << 0)|
+				     (1 << 1));
+			clone_mask = ((1 << INTEL_OUTPUT_ANALOG) |
+				      (1 << INTEL_OUTPUT_DVO) |
+				      (1 << INTEL_OUTPUT_SDVO));
+			break;
+		case INTEL_OUTPUT_ANALOG:
+			crtc_mask = ((1 << 0)|
+				     (1 << 1));
+			clone_mask = ((1 << INTEL_OUTPUT_ANALOG) |
+				      (1 << INTEL_OUTPUT_DVO) |
+				      (1 << INTEL_OUTPUT_SDVO));
+			break;
+		case INTEL_OUTPUT_LVDS:
+			crtc_mask = (1 << 1);
+			clone_mask = (1 << INTEL_OUTPUT_LVDS);
+			break;
+		case INTEL_OUTPUT_TVOUT:
+			crtc_mask = ((1 << 0) |
+				     (1 << 1));
+			clone_mask = (1 << INTEL_OUTPUT_TVOUT);
+			break;
+		}
+		encoder->possible_crtcs = crtc_mask;
+		encoder->possible_clones = intel_connector_clones(dev, clone_mask);
+	}
+}
+
+static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+	struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+	struct drm_device *dev = fb->dev;
+
+	if (fb->fbdev)
+		intelfb_remove(dev, fb);
+
+	drm_framebuffer_cleanup(fb);
+	mutex_lock(&dev->struct_mutex);
+	drm_gem_object_unreference(intel_fb->obj);
+	mutex_unlock(&dev->struct_mutex);
+
+	kfree(intel_fb);
+}
+
+static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
+						struct drm_file *file_priv,
+						unsigned int *handle)
+{
+	struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+	struct drm_gem_object *object = intel_fb->obj;
+
+	return drm_gem_handle_create(file_priv, object, handle);
+}
+
+static const struct drm_framebuffer_funcs intel_fb_funcs = {
+	.destroy = intel_user_framebuffer_destroy,
+	.create_handle = intel_user_framebuffer_create_handle,
+};
+
+int intel_framebuffer_create(struct drm_device *dev,
+			     struct drm_mode_fb_cmd *mode_cmd,
+			     struct drm_framebuffer **fb,
+			     struct drm_gem_object *obj)
+{
+	struct intel_framebuffer *intel_fb;
+	int ret;
+
+	intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
+	if (!intel_fb)
+		return -ENOMEM;
+
+	ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
+	if (ret) {
+		DRM_ERROR("framebuffer init failed %d\n", ret);
+		return ret;
+	}
+
+	drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
+
+	intel_fb->obj = obj;
+
+	*fb = &intel_fb->base;
+
+	return 0;
+}
+
+
+static struct drm_framebuffer *
+intel_user_framebuffer_create(struct drm_device *dev,
+			      struct drm_file *filp,
+			      struct drm_mode_fb_cmd *mode_cmd)
+{
+	struct drm_gem_object *obj;
+	struct drm_framebuffer *fb;
+	int ret;
+
+	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handle);
+	if (!obj)
+		return NULL;
+
+	ret = intel_framebuffer_create(dev, mode_cmd, &fb, obj);
+	if (ret) {
+		drm_gem_object_unreference(obj);
+		return NULL;
+	}
+
+	return fb;
+}
+
+static int intel_insert_new_fb(struct drm_device *dev,
+			       struct drm_file *file_priv,
+			       struct drm_framebuffer *fb,
+			       struct drm_mode_fb_cmd *mode_cmd)
+{
+	struct intel_framebuffer *intel_fb;
+	struct drm_gem_object *obj;
+	struct drm_crtc *crtc;
+
+	intel_fb = to_intel_framebuffer(fb);
+
+	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
+
+	if (!obj)
+		return -EINVAL;
+
+	intel_fb->obj = obj;
+	drm_gem_object_unreference(intel_fb->obj);
+	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
+	mutex_unlock(&dev->struct_mutex);
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		if (crtc->fb == fb) {
+			struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+			crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y);
+		}
+	}
+	return 0;
+}
+
+static const struct drm_mode_config_funcs intel_mode_funcs = {
+	.resize_fb = intel_insert_new_fb,
+	.fb_create = intel_user_framebuffer_create,
+	.fb_changed = intelfb_probe,
+};
+
+void intel_modeset_init(struct drm_device *dev)
+{
+	int num_pipe;
+	int i;
+
+	drm_mode_config_init(dev);
+
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+
+	dev->mode_config.funcs = (void *)&intel_mode_funcs;
+
+	if (IS_I965G(dev)) {
+		dev->mode_config.max_width = 8192;
+		dev->mode_config.max_height = 8192;
+	} else {
+		dev->mode_config.max_width = 2048;
+		dev->mode_config.max_height = 2048;
+	}
+
+	/* set memory base */
+	if (IS_I9XX(dev))
+		dev->mode_config.fb_base = pci_resource_start(dev->pdev, 2);
+	else
+		dev->mode_config.fb_base = pci_resource_start(dev->pdev, 0);
+
+	if (IS_MOBILE(dev) || IS_I9XX(dev))
+		num_pipe = 2;
+	else
+		num_pipe = 1;
+	DRM_DEBUG("%d display pipe%s available.\n",
+		  num_pipe, num_pipe > 1 ? "s" : "");
+
+	for (i = 0; i < num_pipe; i++) {
+		intel_crtc_init(dev, i);
+	}
+
+	intel_setup_outputs(dev);
+}
+
+void intel_modeset_cleanup(struct drm_device *dev)
+{
+	drm_mode_config_cleanup(dev);
+}
+
+
+/* current intel driver doesn't take advantage of encoders
+   always give back the encoder for the connector
+*/
+struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
+{
+	struct intel_output *intel_output = to_intel_output(connector);
+
+	return &intel_output->enc;
+}