radeon: add initial atombios modesetting and GEM -> TTM translation layer.

This is an initial import of the atom bios parser with modesetting support
for r500 hw using atombios. It also includes a simple memory manager
layer that translates a radeon GEM style interface onto TTM internally.

So far this memory manager has only been used for pinned object allocation
for the DDX to test modesetting.

1 files changed, 725 insertions, 0 deletions

diff --git a/linux-core/radeon_display.c b/linux-core/radeon_display.c
new file mode 100644
index 00000000..7a7b5856
--- /dev/null
+++ b/linux-core/radeon_display.c
@@ -0,0 +1,725 @@
+/*
+ * Copyright 2007-8 Advanced Micro Devices, Inc.
+ * Copyright 2008 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
+ *          Alex Deucher
+ */
+#include "drmP.h"
+#include "radeon_drm.h"
+#include "radeon_drv.h"
+
+#include "atom.h"
+#include <asm/div64.h>
+
+#include "drm_crtc_helper.h"
+
+#define CURSOR_WIDTH 64
+#define CURSOR_HEIGHT 64
+
+int radeon_ddc_dump(struct drm_connector *connector);
+
+
+
+static void avivo_crtc_load_lut(struct drm_crtc *crtc)
+{
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	int i;
+
+	DRM_DEBUG("%d\n", radeon_crtc->crtc_id);
+	RADEON_WRITE(AVIVO_DC_LUTA_CONTROL + radeon_crtc->crtc_offset, 0);
+	
+	RADEON_WRITE(AVIVO_DC_LUTA_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
+	RADEON_WRITE(AVIVO_DC_LUTA_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
+	RADEON_WRITE(AVIVO_DC_LUTA_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);
+		
+	RADEON_WRITE(AVIVO_DC_LUTA_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
+	RADEON_WRITE(AVIVO_DC_LUTA_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
+	RADEON_WRITE(AVIVO_DC_LUTA_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);
+
+	RADEON_WRITE(AVIVO_DC_LUT_RW_SELECT, radeon_crtc->crtc_id);
+	RADEON_WRITE(AVIVO_DC_LUT_RW_MODE, 0);
+	RADEON_WRITE(AVIVO_DC_LUT_WRITE_EN_MASK, 0x0000003f);
+
+	for (i = 0; i < 256; i++) {
+		
+		RADEON_WRITE8(AVIVO_DC_LUT_RW_INDEX, i);
+		RADEON_WRITE(AVIVO_DC_LUT_30_COLOR,
+			     (radeon_crtc->lut_r[i] << 22) |
+			     (radeon_crtc->lut_g[i] << 12) |
+			     (radeon_crtc->lut_b[i] << 2));
+	}
+
+	RADEON_WRITE(AVIVO_D1GRPH_LUT_SEL + radeon_crtc->crtc_offset, radeon_crtc->crtc_id);
+}
+
+
+void radeon_crtc_load_lut(struct drm_crtc *crtc)
+{
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	u32 temp;
+	int i;
+	if (!crtc->enabled)
+		return;
+
+	
+	if (radeon_is_avivo(dev_priv)) {
+		avivo_crtc_load_lut(crtc);
+		return;
+	}
+
+	temp = RADEON_READ(RADEON_DAC_CNTL2);
+	if (radeon_crtc->crtc_id == 0)
+		temp &= (uint32_t)~RADEON_DAC2_PALETTE_ACC_CTL;
+	else
+		temp |= RADEON_DAC2_PALETTE_ACC_CTL;
+	RADEON_WRITE(RADEON_DAC_CNTL2, temp);
+
+	for (i = 0; i < 256; i++) {
+//		OUTPAL(i, radeon_crtc->lut_r[i], radeon_crtc->lut_g[i], radeon_crtc->lut_b[i]);
+	}
+
+}
+
+/** Sets the color ramps on behalf of RandR */
+void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
+			      u16 blue, int regno)
+{
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+
+	if (regno==0)
+		DRM_DEBUG("gamma set %d\n", radeon_crtc->crtc_id);
+	radeon_crtc->lut_r[regno] = red >> 8;
+	radeon_crtc->lut_g[regno] = green >> 8;
+	radeon_crtc->lut_b[regno] = blue >> 8;
+}
+
+void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
+{
+}
+
+
+
+static bool radeon_crtc_mode_fixup(struct drm_crtc *crtc,
+				   struct drm_display_mode *mode,
+				   struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+
+static void radeon_crtc_mode_set(struct drm_crtc *crtc,
+				 struct drm_display_mode *mode,
+				 struct drm_display_mode *adjusted_mode,
+				 int x, int y)
+{
+
+}
+
+void radeon_crtc_set_base(struct drm_crtc *crtc, int x, int y)
+{
+}
+
+static void radeon_crtc_prepare(struct drm_crtc *crtc)
+{
+}
+
+static void radeon_crtc_commit(struct drm_crtc *crtc)
+{
+}
+
+static void avivo_lock_cursor(struct drm_crtc *crtc, bool lock)
+{
+	struct drm_radeon_private *dev_priv = crtc->dev->dev_private;
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+
+	uint32_t tmp;
+
+	tmp = RADEON_READ(AVIVO_D1CUR_UPDATE + radeon_crtc->crtc_offset);
+	if (lock)
+		tmp |= AVIVO_D1CURSOR_UPDATE_LOCK;
+	else
+		tmp &= ~AVIVO_D1CURSOR_UPDATE_LOCK;
+
+	RADEON_WRITE(AVIVO_D1CUR_UPDATE + radeon_crtc->crtc_offset, tmp);
+}
+
+static int radeon_crtc_cursor_set(struct drm_crtc *crtc,
+				  struct drm_file *file_priv,
+				  uint32_t handle,
+				  uint32_t width,
+				  uint32_t height)
+{
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+	struct drm_radeon_private *dev_priv = crtc->dev->dev_private;
+	struct drm_gem_object *obj;
+	struct drm_radeon_gem_object *obj_priv;
+
+	if (!handle) {
+		RADEON_WRITE(AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset, 0);
+		return 0;
+		/* turn off cursor */
+	}
+
+	obj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
+	if (!obj) {
+		DRM_ERROR("Cannot find cursor object %x for crtc %d\n", handle, radeon_crtc->crtc_id);
+		return -EINVAL;
+	}
+
+	obj_priv = obj->driver_private;
+	
+	RADEON_WRITE(AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset, 0);
+	if (radeon_is_avivo(dev_priv)) {
+		RADEON_WRITE(AVIVO_D1CUR_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
+			     dev_priv->fb_location + obj_priv->bo->offset);
+		RADEON_WRITE(AVIVO_D1CUR_SIZE + radeon_crtc->crtc_offset,
+			     (CURSOR_WIDTH - 1) << 16 | (CURSOR_HEIGHT - 1));
+		RADEON_WRITE(AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset,
+			     AVIVO_D1CURSOR_EN | (AVIVO_D1CURSOR_MODE_24BPP << AVIVO_D1CURSOR_MODE_SHIFT));
+	}
+
+	mutex_lock(&crtc->dev->struct_mutex);
+	drm_gem_object_unreference(obj);
+	mutex_unlock(&crtc->dev->struct_mutex);
+	
+	return 0;
+}
+
+static int radeon_crtc_cursor_move(struct drm_crtc *crtc,
+				   int x, int y)
+{
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+	struct drm_radeon_private *dev_priv = crtc->dev->dev_private;
+	int xorigin = 0, yorigin = 0;
+
+	if (x < 0) xorigin = -x+1;
+	if (y < 0) yorigin = -x+1;
+	if (xorigin >= CURSOR_WIDTH) xorigin = CURSOR_WIDTH - 1;
+	if (yorigin >= CURSOR_WIDTH) yorigin = CURSOR_WIDTH - 1;
+
+	if (crtc->mode.flags & DRM_MODE_FLAG_INTERLACE)
+		y /= 2;
+	else if (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)
+		y *= 2;
+
+	if (radeon_is_avivo(dev_priv)) {
+		avivo_lock_cursor(crtc, true);
+
+		RADEON_WRITE(AVIVO_D1CUR_POSITION + radeon_crtc->crtc_offset,
+			     ((xorigin ? 0: x) << 16) |
+			     (yorigin ? 0 : y));
+		RADEON_WRITE(AVIVO_D1CUR_HOT_SPOT + radeon_crtc->crtc_offset, (xorigin << 16) | yorigin);
+		avivo_lock_cursor(crtc, false);
+	}
+	
+	return 0;
+}
+
+static void radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
+				  u16 *blue, uint32_t size)
+{
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+	int i;
+
+	if (size != 256)
+		return;
+
+	for (i = 0; i < 256; i++) {
+		radeon_crtc->lut_r[i] = red[i] >> 8;
+		radeon_crtc->lut_g[i] = green[i] >> 8;
+		radeon_crtc->lut_b[i] = blue[i] >> 8;
+	}
+
+	radeon_crtc_load_lut(crtc);
+}
+
+static void radeon_crtc_destroy(struct drm_crtc *crtc)
+{
+	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+
+	drm_crtc_cleanup(crtc);
+	kfree(radeon_crtc);
+}
+
+static const struct drm_crtc_helper_funcs radeon_helper_funcs = {
+	.dpms = radeon_crtc_dpms,
+	.mode_fixup = radeon_crtc_mode_fixup,
+	.mode_set = radeon_crtc_mode_set,
+	.mode_set_base = radeon_crtc_set_base,
+	.prepare = radeon_crtc_prepare,
+	.commit = radeon_crtc_commit,
+};
+
+static const struct drm_crtc_funcs radeon_crtc_funcs = {
+	.cursor_set = radeon_crtc_cursor_set,
+	.cursor_move = radeon_crtc_cursor_move,
+	.gamma_set = radeon_crtc_gamma_set,
+	.set_config = drm_crtc_helper_set_config,
+	.destroy = radeon_crtc_destroy,
+};
+
+static void radeon_crtc_init(struct drm_device *dev, int index)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	struct radeon_crtc *radeon_crtc;
+	int i;
+
+	radeon_crtc = kzalloc(sizeof(struct radeon_crtc) + (RADEONFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
+	//	radeon_crtc = kzalloc(sizeof(struct radeon_crtc), GFP_KERNEL);
+	if (radeon_crtc == NULL)
+		return;
+
+	drm_crtc_init(dev, &radeon_crtc->base, &radeon_crtc_funcs);
+
+	drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256);
+	radeon_crtc->crtc_id = index;
+
+	radeon_crtc->mode_set.crtc = &radeon_crtc->base;
+	radeon_crtc->mode_set.connectors = (struct drm_connector **)(radeon_crtc + 1);
+	radeon_crtc->mode_set.num_connectors = 0;
+
+	for (i = 0; i < 256; i++) {
+		radeon_crtc->lut_r[i] = i;
+		radeon_crtc->lut_g[i] = i;
+		radeon_crtc->lut_b[i] = i;
+	}
+
+	if (dev_priv->is_atom_bios && dev_priv->chip_family > CHIP_RS690)
+		radeon_atombios_init_crtc(dev, radeon_crtc);
+	else
+		drm_crtc_helper_add(&radeon_crtc->base, &radeon_helper_funcs);
+}
+
+bool radeon_legacy_setup_enc_conn(struct drm_device *dev)
+{
+
+	radeon_get_legacy_connector_info_from_bios(dev);
+	return false;
+}
+
+bool radeon_setup_enc_conn(struct drm_device *dev)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	struct radeon_mode_info *mode_info = &dev_priv->mode_info;
+	/* do all the mac and stuff */
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	int i;
+
+	if (dev_priv->is_atom_bios)
+		radeon_get_atom_connector_info_from_bios_connector_table(dev);
+	else
+		radeon_get_legacy_connector_info_from_bios(dev);
+
+	for (i = 0; i < RADEON_MAX_BIOS_CONNECTOR; i++) {
+		if (!mode_info->bios_connector[i].valid)
+			continue;
+
+		/* add a connector for this */
+		if (mode_info->bios_connector[i].connector_type == CONNECTOR_NONE)
+			continue;
+
+		connector = radeon_connector_add(dev, i);
+		if (!connector)
+			continue;
+
+		encoder = NULL;
+		/* if we find an LVDS connector */
+		if (mode_info->bios_connector[i].connector_type == CONNECTOR_LVDS) {
+			if (radeon_is_avivo(dev_priv))
+				encoder = radeon_encoder_lvtma_add(dev, i);
+			else
+				encoder = radeon_encoder_legacy_lvds_add(dev, i);
+			if (encoder)
+				drm_mode_connector_attach_encoder(connector, encoder);
+		}
+
+		/* DAC on DVI or VGA */
+		if ((mode_info->bios_connector[i].connector_type == CONNECTOR_DVI_I) ||
+		    (mode_info->bios_connector[i].connector_type == CONNECTOR_DVI_A) ||
+		    (mode_info->bios_connector[i].connector_type == CONNECTOR_VGA)) {
+			if (radeon_is_avivo(dev_priv))
+				encoder = radeon_encoder_atom_dac_add(dev, i, mode_info->bios_connector[i].dac_type, 0);
+			if (encoder)
+				drm_mode_connector_attach_encoder(connector, encoder);
+		}
+
+		/* TMDS on DVI */
+		if ((mode_info->bios_connector[i].connector_type == CONNECTOR_DVI_I) ||
+		    (mode_info->bios_connector[i].connector_type == CONNECTOR_DVI_D)) {
+			if (radeon_is_avivo(dev_priv))
+				encoder = radeon_encoder_atom_tmds_add(dev, i, mode_info->bios_connector[i].dac_type);
+			if (encoder)
+				drm_mode_connector_attach_encoder(connector, encoder);
+		}
+
+		/* TVDAC on DIN */
+		if (mode_info->bios_connector[i].connector_type == CONNECTOR_DIN) {
+			if (radeon_is_avivo(dev_priv))
+				encoder = radeon_encoder_atom_dac_add(dev, i, mode_info->bios_connector[i].dac_type, 1);
+			if (encoder)
+				drm_mode_connector_attach_encoder(connector, encoder);
+		}
+	}
+
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+		radeon_ddc_dump(connector);
+	return true;
+}
+
+
+
+void avivo_i2c_do_lock(struct radeon_connector *radeon_connector, int lock_state)
+{
+	struct drm_radeon_private *dev_priv = radeon_connector->base.dev->dev_private;
+	uint32_t temp;
+	struct radeon_i2c_bus_rec *rec = &radeon_connector->ddc_bus->rec;
+
+	temp = RADEON_READ(rec->mask_clk_reg);
+	if (lock_state)
+		temp |= rec->put_clk_mask;
+	else
+		temp &= ~rec->put_clk_mask;
+	RADEON_WRITE(rec->mask_clk_reg, temp);
+	temp = RADEON_READ(rec->mask_clk_reg);
+
+	temp = RADEON_READ(rec->mask_data_reg);
+	if (lock_state)
+		temp |= rec->put_data_mask;
+	else
+		temp &= ~rec->put_data_mask;
+	RADEON_WRITE(rec->mask_data_reg, temp);
+	temp = RADEON_READ(rec->mask_data_reg);
+}
+
+int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
+{
+	struct drm_radeon_private *dev_priv = radeon_connector->base.dev->dev_private;
+	struct edid *edid;
+	int ret = 0;
+
+	if (!radeon_connector->ddc_bus)
+		return -1;
+	
+	if (radeon_is_avivo(dev_priv))
+		avivo_i2c_do_lock(radeon_connector, 1);
+	edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
+	if (radeon_is_avivo(dev_priv))
+		avivo_i2c_do_lock(radeon_connector, 0);
+	if (edid) {
+		drm_mode_connector_update_edid_property(&radeon_connector->base, edid);
+		ret = drm_add_edid_modes(&radeon_connector->base, edid);
+		kfree(edid);
+		return ret;
+	}
+	return -1;
+}
+
+int radeon_ddc_dump(struct drm_connector *connector)
+{
+	struct edid *edid;
+	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+	int ret = 0;
+
+	if (!radeon_connector->ddc_bus)
+		return -1;
+	edid = drm_get_edid(connector, &radeon_connector->ddc_bus->adapter);
+	if (edid) {
+		kfree(edid);
+	}
+	return ret;
+}
+
+static inline uint32_t radeon_div(uint64_t n, uint32_t d)
+{
+	uint64_t x, y, result;
+	uint64_t mod;
+	
+	n += d / 2;
+
+	mod = do_div(n, d);
+	return n;
+}
+
+void radeon_compute_pll(struct radeon_pll *pll,
+			uint64_t freq,
+			uint32_t *dot_clock_p,
+			uint32_t *fb_div_p,
+			uint32_t *ref_div_p,
+			uint32_t *post_div_p,
+			int flags)
+{
+	uint32_t min_ref_div = pll->min_ref_div;
+	uint32_t max_ref_div = pll->max_ref_div;
+	uint32_t best_vco = pll->best_vco;
+	uint32_t best_post_div = 1;
+	uint32_t best_ref_div = 1;
+	uint32_t best_feedback_div = 1;
+	uint32_t best_freq = -1;
+	uint32_t best_error = 0xffffffff;
+	uint32_t best_vco_diff = 1;
+	uint32_t post_div;
+
+	DRM_DEBUG("PLL freq %llu\n", freq);
+	freq = freq * 1000;
+
+	if (flags & RADEON_PLL_USE_REF_DIV)
+		min_ref_div = max_ref_div = pll->reference_div;
+	else {
+		while (min_ref_div < max_ref_div-1) {
+			uint32_t mid=(min_ref_div+max_ref_div)/2;
+			uint32_t pll_in = pll->reference_freq / mid;
+			if (pll_in < pll->pll_in_min)
+				max_ref_div = mid;
+			else if (pll_in > pll->pll_in_max)
+				min_ref_div = mid;
+			else
+				break;
+		}
+	}
+
+	for (post_div = pll->min_post_div; post_div <= pll->max_post_div; ++post_div) {
+		uint32_t ref_div;
+
+		if ((flags & RADEON_PLL_NO_ODD_POST_DIV) && (post_div & 1))
+			continue;
+
+		/* legacy radeons only have a few post_divs */
+		if (flags & RADEON_PLL_LEGACY) {
+			if ((post_div == 5) ||
+			    (post_div == 7) ||
+			    (post_div == 9) ||
+			    (post_div == 10) ||
+			    (post_div == 11))
+				continue;
+		}
+
+		for (ref_div = min_ref_div; ref_div <= max_ref_div; ++ref_div) {
+			uint32_t feedback_div, current_freq, error, vco_diff;
+			uint32_t pll_in = pll->reference_freq / ref_div;
+			uint32_t min_feed_div = pll->min_feedback_div;
+			uint32_t max_feed_div = pll->max_feedback_div+1;
+
+			if (pll_in < pll->pll_in_min || pll_in > pll->pll_in_max)
+				continue;
+
+			while (min_feed_div < max_feed_div) {
+				uint32_t vco;
+				feedback_div = (min_feed_div+max_feed_div)/2;
+
+				vco = radeon_div((uint64_t)pll->reference_freq * feedback_div,
+						 ref_div);
+
+				if (vco < pll->pll_out_min) {
+					min_feed_div = feedback_div+1;
+					continue;
+				} else if(vco > pll->pll_out_max) {
+					max_feed_div = feedback_div;
+					continue;
+				}
+
+				current_freq = radeon_div((uint64_t)pll->reference_freq * 10000 * feedback_div,
+							  ref_div * post_div);
+				
+				error = abs(current_freq - freq);
+				vco_diff = abs(vco - best_vco);
+
+				if ((best_vco == 0 && error < best_error) ||
+				    (best_vco != 0 &&
+				     (error < best_error - 100 ||
+				      (abs(error - best_error) < 100 && vco_diff < best_vco_diff )))) {
+					best_post_div = post_div;
+					best_ref_div = ref_div;
+					best_feedback_div = feedback_div;
+					best_freq = current_freq;
+					best_error = error;
+					best_vco_diff = vco_diff;
+				} else if (current_freq == freq) {
+					if (best_freq == -1) {
+						best_post_div = post_div;
+						best_ref_div = ref_div;
+						best_feedback_div = feedback_div;
+						best_freq = current_freq;
+						best_error = error;
+						best_vco_diff = vco_diff;
+					} else if ((flags & RADEON_PLL_PREFER_LOW_REF_DIV) && (ref_div < best_ref_div)) {
+						best_post_div = post_div;
+						best_ref_div = ref_div;
+						best_feedback_div = feedback_div;
+						best_freq = current_freq;
+						best_error = error;
+						best_vco_diff = vco_diff;
+					}
+				}
+				
+				if (current_freq < freq)
+					min_feed_div = feedback_div+1;
+				else
+					max_feed_div = feedback_div;
+			}
+		}
+	}
+	
+	*dot_clock_p = best_freq / 10000;
+	*fb_div_p = best_feedback_div;
+	*ref_div_p = best_ref_div;
+	*post_div_p = best_post_div;
+}
+
+void radeon_get_clock_info(struct drm_device *dev)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	struct radeon_pll *pll = &dev_priv->mode_info.pll;
+	int ret;
+
+	if (dev_priv->is_atom_bios)
+		ret = radeon_atom_get_clock_info(dev);
+	else
+		ret = radeon_combios_get_clock_info(dev);
+
+	if (ret) {
+
+		if (pll->reference_div < 2) pll->reference_div = 12;
+	} else {
+		// TODO FALLBACK
+	}
+
+	if (radeon_is_avivo(dev_priv)) {
+		pll->min_post_div = 2;
+		pll->max_post_div = 0x7f;
+	} else {
+		pll->min_post_div = 1;
+		pll->max_post_div = 12; // 16 on crtc 0??
+	}
+
+	pll->min_ref_div = 2;
+	pll->max_ref_div = 0x3ff;
+	pll->min_feedback_div = 4;
+	pll->max_feedback_div = 0x7ff;
+	pll->best_vco = 0;
+
+}
+
+static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+	struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);
+	struct drm_device *dev = fb->dev;
+
+	if (fb->fbdev)
+		radeonfb_remove(dev, fb);
+
+	drm_framebuffer_cleanup(fb);
+	kfree(radeon_fb);
+}
+
+static const struct drm_framebuffer_funcs radeon_fb_funcs = {
+	.destroy = radeon_user_framebuffer_destroy,
+};
+
+struct drm_framebuffer *radeon_user_framebuffer_create(struct drm_device *dev,
+						       struct drm_file *filp,
+						       struct drm_mode_fb_cmd *mode_cmd)
+{
+
+	struct radeon_framebuffer *radeon_fb;
+
+	radeon_fb = kzalloc(sizeof(*radeon_fb), GFP_KERNEL);
+	if (!radeon_fb)
+		return NULL;
+
+	drm_framebuffer_init(dev, &radeon_fb->base, &radeon_fb_funcs);
+	drm_helper_mode_fill_fb_struct(&radeon_fb->base, mode_cmd);
+
+	if (filp) {
+		radeon_fb->obj = drm_gem_object_lookup(dev, filp,
+						       mode_cmd->handle);
+		if (!radeon_fb->obj) {
+			kfree(radeon_fb);
+			return NULL;
+		}
+		drm_gem_object_unreference(radeon_fb->obj);
+	}
+	return &radeon_fb->base;
+}
+
+static const struct drm_mode_config_funcs radeon_mode_funcs = {
+	.fb_create = radeon_user_framebuffer_create,
+	.fb_changed = radeonfb_probe,
+};
+
+
+int radeon_modeset_init(struct drm_device *dev)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	static struct card_info card;
+	size_t size;
+	int num_crtc = 2, i;
+	int ret;
+
+	drm_mode_config_init(dev);
+
+	dev->mode_config.funcs = (void *)&radeon_mode_funcs;
+
+	if (radeon_is_avivo(dev_priv)) {
+		    dev->mode_config.max_width = 8192;
+		    dev->mode_config.max_height = 8192;
+	} else {
+		    dev->mode_config.max_width = 4096;
+		    dev->mode_config.max_height = 4096;
+	}
+
+	dev->mode_config.fb_base = dev_priv->fb_aper_offset;
+
+	/* allocate crtcs - TODO single crtc */
+	for (i = 0; i < num_crtc; i++) {
+		radeon_crtc_init(dev, i);
+	}
+
+	/* okay we should have all the bios connectors */
+
+	ret = radeon_setup_enc_conn(dev);
+
+	if (!ret)
+		return ret;
+	
+	drm_helper_initial_config(dev, false);
+
+	return 0;
+}
+
+
+int radeon_load_modeset_init(struct drm_device *dev)
+{
+	int ret;
+	ret = radeon_modeset_init(dev);
+
+	return ret;
+}
+
+void radeon_modeset_cleanup(struct drm_device *dev)
+{
+	drm_mode_config_cleanup(dev);
+}
+