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/*

 * 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.h"

#include "atom.h"

//#include 

#include "drm_crtc_helper.h"

#include "drm_edid.h"

static 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 radeon_device *rdev = dev->dev_private;

	int i;

	DRM_DEBUG("%d\n", radeon_crtc->crtc_id);

	WREG32(AVIVO_DC_LUTA_CONTROL + radeon_crtc->crtc_offset, 0);

	WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);

	WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);

	WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);

	WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);

	WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);

	WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);

	WREG32(AVIVO_DC_LUT_RW_SELECT, radeon_crtc->crtc_id);

	WREG32(AVIVO_DC_LUT_RW_MODE, 0);

	WREG32(AVIVO_DC_LUT_WRITE_EN_MASK, 0x0000003f);

	WREG8(AVIVO_DC_LUT_RW_INDEX, 0);

	for (i = 0; i < 256; i++) {

		WREG32(AVIVO_DC_LUT_30_COLOR,

			     (radeon_crtc->lut_r[i] << 20) |

			     (radeon_crtc->lut_g[i] << 10) |

			     (radeon_crtc->lut_b[i] << 0));

	}

	WREG32(AVIVO_D1GRPH_LUT_SEL + radeon_crtc->crtc_offset, radeon_crtc->crtc_id);

}

static void legacy_crtc_load_lut(struct drm_crtc *crtc)

{

	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

	struct drm_device *dev = crtc->dev;

	struct radeon_device *rdev = dev->dev_private;

	int i;

	uint32_t dac2_cntl;

	dac2_cntl = RREG32(RADEON_DAC_CNTL2);

	if (radeon_crtc->crtc_id == 0)

		dac2_cntl &= (uint32_t)~RADEON_DAC2_PALETTE_ACC_CTL;

	else

		dac2_cntl |= RADEON_DAC2_PALETTE_ACC_CTL;

	WREG32(RADEON_DAC_CNTL2, dac2_cntl);

	WREG8(RADEON_PALETTE_INDEX, 0);

	for (i = 0; i < 256; i++) {

		WREG32(RADEON_PALETTE_30_DATA,

			     (radeon_crtc->lut_r[i] << 20) |

			     (radeon_crtc->lut_g[i] << 10) |

			     (radeon_crtc->lut_b[i] << 0));

	}

}

void radeon_crtc_load_lut(struct drm_crtc *crtc)

{

	struct drm_device *dev = crtc->dev;

	struct radeon_device *rdev = dev->dev_private;

	if (!crtc->enabled)

		return;

	if (ASIC_IS_AVIVO(rdev))

		avivo_crtc_load_lut(crtc);

	else

		legacy_crtc_load_lut(crtc);

}

/** Sets the color ramps on behalf of fbcon */

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);

	radeon_crtc->lut_r[regno] = red >> 6;

	radeon_crtc->lut_g[regno] = green >> 6;

	radeon_crtc->lut_b[regno] = blue >> 6;

}

/** Gets the color ramps on behalf of fbcon */

void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,

			      u16 *blue, int regno)

{

	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

	*red = radeon_crtc->lut_r[regno] << 6;

	*green = radeon_crtc->lut_g[regno] << 6;

	*blue = radeon_crtc->lut_b[regno] << 6;

}

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;

	}

	/* userspace palettes are always correct as is */

		for (i = 0; i < 256; i++) {

			radeon_crtc->lut_r[i] = red[i] >> 6;

			radeon_crtc->lut_g[i] = green[i] >> 6;

			radeon_crtc->lut_b[i] = blue[i] >> 6;

		}

	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_funcs radeon_crtc_funcs = {

    .cursor_set = NULL,

    .cursor_move = NULL,

	.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 radeon_device *rdev = 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);

	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;

	rdev->mode_info.crtcs[index] = radeon_crtc;

#if 0

	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;

#endif

	for (i = 0; i < 256; i++) {

		radeon_crtc->lut_r[i] = i << 2;

		radeon_crtc->lut_g[i] = i << 2;

		radeon_crtc->lut_b[i] = i << 2;

	}

	if (rdev->is_atom_bios && (ASIC_IS_AVIVO(rdev) || radeon_r4xx_atom))

		radeon_atombios_init_crtc(dev, radeon_crtc);

	else

		radeon_legacy_init_crtc(dev, radeon_crtc);

}

static const char *encoder_names[34] = {

	"NONE",

	"INTERNAL_LVDS",

	"INTERNAL_TMDS1",

	"INTERNAL_TMDS2",

	"INTERNAL_DAC1",

	"INTERNAL_DAC2",

	"INTERNAL_SDVOA",

	"INTERNAL_SDVOB",

	"SI170B",

	"CH7303",

	"CH7301",

	"INTERNAL_DVO1",

	"EXTERNAL_SDVOA",

	"EXTERNAL_SDVOB",

	"TITFP513",

	"INTERNAL_LVTM1",

	"VT1623",

	"HDMI_SI1930",

	"HDMI_INTERNAL",

	"INTERNAL_KLDSCP_TMDS1",

	"INTERNAL_KLDSCP_DVO1",

	"INTERNAL_KLDSCP_DAC1",

	"INTERNAL_KLDSCP_DAC2",

	"SI178",

	"MVPU_FPGA",

	"INTERNAL_DDI",

	"VT1625",

	"HDMI_SI1932",

	"DP_AN9801",

	"DP_DP501",

	"INTERNAL_UNIPHY",

	"INTERNAL_KLDSCP_LVTMA",

	"INTERNAL_UNIPHY1",

	"INTERNAL_UNIPHY2",

};

static const char *connector_names[15] = {

	"Unknown",

	"VGA",

	"DVI-I",

	"DVI-D",

	"DVI-A",

	"Composite",

	"S-video",

	"LVDS",

	"Component",

	"DIN",

	"DisplayPort",

	"HDMI-A",

	"HDMI-B",

	"TV",

	"eDP",

};

static const char *hpd_names[7] = {

	"NONE",

	"HPD1",

	"HPD2",

	"HPD3",

	"HPD4",

	"HPD5",

	"HPD6",

};

static void radeon_print_display_setup(struct drm_device *dev)

{

	struct drm_connector *connector;

	struct radeon_connector *radeon_connector;

	struct drm_encoder *encoder;

	struct radeon_encoder *radeon_encoder;

	uint32_t devices;

	int i = 0;

	DRM_INFO("Radeon Display Connectors\n");

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {

		radeon_connector = to_radeon_connector(connector);

		DRM_INFO("Connector %d:\n", i);

		DRM_INFO("  %s\n", connector_names[connector->connector_type]);

		if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)

			DRM_INFO("  %s\n", hpd_names[radeon_connector->hpd.hpd]);

		if (radeon_connector->ddc_bus) {

			DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",

				 radeon_connector->ddc_bus->rec.mask_clk_reg,

				 radeon_connector->ddc_bus->rec.mask_data_reg,

				 radeon_connector->ddc_bus->rec.a_clk_reg,

				 radeon_connector->ddc_bus->rec.a_data_reg,

				 radeon_connector->ddc_bus->rec.en_clk_reg,

				 radeon_connector->ddc_bus->rec.en_data_reg,

				 radeon_connector->ddc_bus->rec.y_clk_reg,

				 radeon_connector->ddc_bus->rec.y_data_reg);

		} else {

			if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||

			    connector->connector_type == DRM_MODE_CONNECTOR_DVII ||

			    connector->connector_type == DRM_MODE_CONNECTOR_DVID ||

			    connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||

			    connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||

			    connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)

				DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");

		}

		DRM_INFO("  Encoders:\n");

		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {

			radeon_encoder = to_radeon_encoder(encoder);

			devices = radeon_encoder->devices & radeon_connector->devices;

			if (devices) {

				if (devices & ATOM_DEVICE_CRT1_SUPPORT)

					DRM_INFO("    CRT1: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_CRT2_SUPPORT)

					DRM_INFO("    CRT2: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_LCD1_SUPPORT)

					DRM_INFO("    LCD1: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_DFP1_SUPPORT)

					DRM_INFO("    DFP1: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_DFP2_SUPPORT)

					DRM_INFO("    DFP2: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_DFP3_SUPPORT)

					DRM_INFO("    DFP3: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_DFP4_SUPPORT)

					DRM_INFO("    DFP4: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_DFP5_SUPPORT)

					DRM_INFO("    DFP5: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_TV1_SUPPORT)

					DRM_INFO("    TV1: %s\n", encoder_names[radeon_encoder->encoder_id]);

				if (devices & ATOM_DEVICE_CV_SUPPORT)

					DRM_INFO("    CV: %s\n", encoder_names[radeon_encoder->encoder_id]);

			}

		}

		i++;

	}

}

static bool radeon_setup_enc_conn(struct drm_device *dev)

{

	struct radeon_device *rdev = dev->dev_private;

	struct drm_connector *drm_connector;

	bool ret = false;

	if (rdev->bios) {

		if (rdev->is_atom_bios) {

			if (rdev->family >= CHIP_R600)

				ret = radeon_get_atom_connector_info_from_object_table(dev);

			else

				ret = radeon_get_atom_connector_info_from_supported_devices_table(dev);

		} else {

			ret = radeon_get_legacy_connector_info_from_bios(dev);

			if (ret == false)

				ret = radeon_get_legacy_connector_info_from_table(dev);

		}

	} else {

		if (!ASIC_IS_AVIVO(rdev))

			ret = radeon_get_legacy_connector_info_from_table(dev);

	}

	if (ret) {

		radeon_setup_encoder_clones(dev);

		radeon_print_display_setup(dev);

		list_for_each_entry(drm_connector, &dev->mode_config.connector_list, head)

			radeon_ddc_dump(drm_connector);

	}

	return ret;

}

int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)

{

	int ret = 0;

	if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||

	    (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)) {

		struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;

		if ((dig->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT ||

		     dig->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) && dig->dp_i2c_bus)

			radeon_connector->edid = drm_get_edid(&radeon_connector->base, &dig->dp_i2c_bus->adapter);

	}

	if (!radeon_connector->ddc_bus)

		return -1;

	if (!radeon_connector->edid) {

		radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);

		radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);

		radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);

	}

	if (radeon_connector->edid) {

		drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);

		ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);

		return ret;

	}

	drm_mode_connector_update_edid_property(&radeon_connector->base, NULL);

	return 0;

}

static 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;

	radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);

	edid = drm_get_edid(connector, &radeon_connector->ddc_bus->adapter);

	radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);

	if (edid) {

		kfree(edid);

	}

	return ret;

}

static inline uint32_t radeon_div(uint64_t n, uint32_t d)

{

	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 *frac_fb_div_p,

			uint32_t *ref_div_p,

			uint32_t *post_div_p)

{

	uint32_t min_ref_div = pll->min_ref_div;

	uint32_t max_ref_div = pll->max_ref_div;

	uint32_t min_post_div = pll->min_post_div;

	uint32_t max_post_div = pll->max_post_div;

	uint32_t min_fractional_feed_div = 0;

	uint32_t max_fractional_feed_div = 0;

	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_frac_feedback_div = 0;

	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 %u %u\n", freq, pll->min_ref_div, pll->max_ref_div);

	freq = freq * 1000;

	if (pll->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;

		}

	}

	if (pll->flags & RADEON_PLL_USE_POST_DIV)

		min_post_div = max_post_div = pll->post_div;

	if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {

		min_fractional_feed_div = pll->min_frac_feedback_div;

		max_fractional_feed_div = pll->max_frac_feedback_div;

	}

	for (post_div = min_post_div; post_div <= max_post_div; ++post_div) {

		uint32_t ref_div;

		if ((pll->flags & RADEON_PLL_NO_ODD_POST_DIV) && (post_div & 1))

			continue;

		/* legacy radeons only have a few post_divs */

		if (pll->flags & RADEON_PLL_LEGACY) {

			if ((post_div == 5) ||

			    (post_div == 7) ||

			    (post_div == 9) ||

			    (post_div == 10) ||

			    (post_div == 11) ||

			    (post_div == 13) ||

			    (post_div == 14) ||

			    (post_div == 15))

				continue;

		}

		for (ref_div = min_ref_div; ref_div <= max_ref_div; ++ref_div) {

			uint32_t feedback_div, current_freq = 0, 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;

				uint32_t min_frac_feed_div = min_fractional_feed_div;

				uint32_t max_frac_feed_div = max_fractional_feed_div + 1;

				uint32_t frac_feedback_div;

				uint64_t tmp;

				feedback_div = (min_feed_div + max_feed_div) / 2;

				tmp = (uint64_t)pll->reference_freq * feedback_div;

				vco = radeon_div(tmp, 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;

				}

				while (min_frac_feed_div < max_frac_feed_div) {

					frac_feedback_div = (min_frac_feed_div + max_frac_feed_div) / 2;

					tmp = (uint64_t)pll->reference_freq * 10000 * feedback_div;

					tmp += (uint64_t)pll->reference_freq * 1000 * frac_feedback_div;

					current_freq = radeon_div(tmp, ref_div * post_div);

					if (pll->flags & RADEON_PLL_PREFER_CLOSEST_LOWER) {

						error = freq - current_freq;

						error = error < 0 ? 0xffffffff : error;

					} else

					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_frac_feedback_div = frac_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_frac_feedback_div = frac_feedback_div;

							best_freq = current_freq;

							best_error = error;

							best_vco_diff = vco_diff;

						} else if (((pll->flags & RADEON_PLL_PREFER_LOW_REF_DIV) && (ref_div < best_ref_div)) ||

							   ((pll->flags & RADEON_PLL_PREFER_HIGH_REF_DIV) && (ref_div > best_ref_div)) ||

							   ((pll->flags & RADEON_PLL_PREFER_LOW_FB_DIV) && (feedback_div < best_feedback_div)) ||

							   ((pll->flags & RADEON_PLL_PREFER_HIGH_FB_DIV) && (feedback_div > best_feedback_div)) ||

							   ((pll->flags & RADEON_PLL_PREFER_LOW_POST_DIV) && (post_div < best_post_div)) ||

							   ((pll->flags & RADEON_PLL_PREFER_HIGH_POST_DIV) && (post_div > best_post_div))) {

							best_post_div = post_div;

							best_ref_div = ref_div;

							best_feedback_div = feedback_div;

							best_frac_feedback_div = frac_feedback_div;

							best_freq = current_freq;

							best_error = error;

							best_vco_diff = vco_diff;

						}

					}

					if (current_freq < freq)

						min_frac_feed_div = frac_feedback_div + 1;

					else

						max_frac_feed_div = frac_feedback_div;

				}

				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;

	*frac_fb_div_p = best_frac_feedback_div;

	*ref_div_p = best_ref_div;

	*post_div_p = best_post_div;

}

void radeon_compute_pll_avivo(struct radeon_pll *pll,

			      uint64_t freq,

			      uint32_t *dot_clock_p,

			      uint32_t *fb_div_p,

			      uint32_t *frac_fb_div_p,

			      uint32_t *ref_div_p,

			      uint32_t *post_div_p)

{

	fixed20_12 m, n, frac_n, p, f_vco, f_pclk, best_freq;

	fixed20_12 pll_out_max, pll_out_min;

	fixed20_12 pll_in_max, pll_in_min;

	fixed20_12 reference_freq;

	fixed20_12 error, ffreq, a, b;

	pll_out_max.full = rfixed_const(pll->pll_out_max);

	pll_out_min.full = rfixed_const(pll->pll_out_min);

	pll_in_max.full = rfixed_const(pll->pll_in_max);

	pll_in_min.full = rfixed_const(pll->pll_in_min);

	reference_freq.full = rfixed_const(pll->reference_freq);

	do_div(freq, 10);

	ffreq.full = rfixed_const(freq);

	error.full = rfixed_const(100 * 100);

	/* max p */

	p.full = rfixed_div(pll_out_max, ffreq);

	p.full = rfixed_floor(p);

	/* min m */

	m.full = rfixed_div(reference_freq, pll_in_max);

	m.full = rfixed_ceil(m);

	while (1) {

		n.full = rfixed_div(ffreq, reference_freq);

		n.full = rfixed_mul(n, m);

		n.full = rfixed_mul(n, p);

		f_vco.full = rfixed_div(n, m);

		f_vco.full = rfixed_mul(f_vco, reference_freq);

		f_pclk.full = rfixed_div(f_vco, p);

		if (f_pclk.full > ffreq.full)

			error.full = f_pclk.full - ffreq.full;

		else

			error.full = ffreq.full - f_pclk.full;

		error.full = rfixed_div(error, f_pclk);

		a.full = rfixed_const(100 * 100);

		error.full = rfixed_mul(error, a);

		a.full = rfixed_mul(m, p);

		a.full = rfixed_div(n, a);

		best_freq.full = rfixed_mul(reference_freq, a);

		if (rfixed_trunc(error) < 25)

			break;

		a.full = rfixed_const(1);

		m.full = m.full + a.full;

		a.full = rfixed_div(reference_freq, m);

		if (a.full >= pll_in_min.full)

			continue;

		m.full = rfixed_div(reference_freq, pll_in_max);

		m.full = rfixed_ceil(m);

		a.full= rfixed_const(1);

		p.full = p.full - a.full;

		a.full = rfixed_mul(p, ffreq);

		if (a.full >= pll_out_min.full)

			continue;

		else {

			DRM_ERROR("Unable to find pll dividers\n");

			break;

		}

	}

	a.full = rfixed_const(10);

	b.full = rfixed_mul(n, a);

	frac_n.full = rfixed_floor(n);

	frac_n.full = rfixed_mul(frac_n, a);

	frac_n.full = b.full - frac_n.full;

	*dot_clock_p = rfixed_trunc(best_freq);

	*fb_div_p = rfixed_trunc(n);

	*frac_fb_div_p = rfixed_trunc(frac_n);

	*ref_div_p = rfixed_trunc(m);

	*post_div_p = rfixed_trunc(p);

	DRM_DEBUG("%u %d.%d, %d, %d\n", *dot_clock_p * 10, *fb_div_p, *frac_fb_div_p, *ref_div_p, *post_div_p);

}

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);

//   if (radeon_fb->obj) {

//       radeon_gem_object_unpin(radeon_fb->obj);

//       mutex_lock(&dev->struct_mutex);

//       drm_gem_object_unreference(radeon_fb->obj);

//       mutex_unlock(&dev->struct_mutex);

//   }

	drm_framebuffer_cleanup(fb);

	kfree(radeon_fb);

}

static int radeon_user_framebuffer_create_handle(struct drm_framebuffer *fb,

                         struct drm_file *file_priv,

                         unsigned int *handle)

{

   struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);

   return NULL;

//   return drm_gem_handle_create(file_priv, radeon_fb->obj, handle);

}

static const struct drm_framebuffer_funcs radeon_fb_funcs = {

	.destroy = radeon_user_framebuffer_destroy,

    .create_handle = radeon_user_framebuffer_create_handle,

};

struct drm_framebuffer *

radeon_framebuffer_create(struct drm_device *dev,

			  struct drm_mode_fb_cmd *mode_cmd,

			  struct drm_gem_object *obj)

{

	struct radeon_framebuffer *radeon_fb;

    radeon_fb = kzalloc(sizeof(*radeon_fb), GFP_KERNEL);

	if (radeon_fb == NULL) {

		return NULL;

	}

    drm_framebuffer_init(dev, &radeon_fb->base, &radeon_fb_funcs);

    drm_helper_mode_fill_fb_struct(&radeon_fb->base, mode_cmd);

	radeon_fb->obj = obj;

	return &radeon_fb->base;

}

static struct drm_framebuffer *

radeon_user_framebuffer_create(struct drm_device *dev,

			       struct drm_file *file_priv,

			       struct drm_mode_fb_cmd *mode_cmd)

{

	struct drm_gem_object *obj;

    return NULL;

//   obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);

//

//   return radeon_framebuffer_create(dev, mode_cmd, obj);

}

static const struct drm_mode_config_funcs radeon_mode_funcs = {

 //  .fb_create = radeon_user_framebuffer_create,

     .fb_changed = radeonfb_probe,

};

struct drm_prop_enum_list {

	int type;

	char *name;

};

static struct drm_prop_enum_list radeon_tmds_pll_enum_list[] =

{	{ 0, "driver" },

	{ 1, "bios" },

};

static struct drm_prop_enum_list radeon_tv_std_enum_list[] =

{	{ TV_STD_NTSC, "ntsc" },

	{ TV_STD_PAL, "pal" },

	{ TV_STD_PAL_M, "pal-m" },

	{ TV_STD_PAL_60, "pal-60" },

	{ TV_STD_NTSC_J, "ntsc-j" },

	{ TV_STD_SCART_PAL, "scart-pal" },

	{ TV_STD_PAL_CN, "pal-cn" },

	{ TV_STD_SECAM, "secam" },

};

static int radeon_modeset_create_props(struct radeon_device *rdev)

{

	int i, sz;

	if (rdev->is_atom_bios) {

		rdev->mode_info.coherent_mode_property =

			drm_property_create(rdev->ddev,

					    DRM_MODE_PROP_RANGE,

					    "coherent", 2);

		if (!rdev->mode_info.coherent_mode_property)

			return -ENOMEM;

		rdev->mode_info.coherent_mode_property->values[0] = 0;

		rdev->mode_info.coherent_mode_property->values[1] = 1;

	}

	if (!ASIC_IS_AVIVO(rdev)) {

		sz = ARRAY_SIZE(radeon_tmds_pll_enum_list);

		rdev->mode_info.tmds_pll_property =

			drm_property_create(rdev->ddev,

					    DRM_MODE_PROP_ENUM,

					    "tmds_pll", sz);

		for (i = 0; i < sz; i++) {

			drm_property_add_enum(rdev->mode_info.tmds_pll_property,

					      i,

					      radeon_tmds_pll_enum_list[i].type,

					      radeon_tmds_pll_enum_list[i].name);

		}

	}

	rdev->mode_info.load_detect_property =

		drm_property_create(rdev->ddev,

				    DRM_MODE_PROP_RANGE,

				    "load detection", 2);

	if (!rdev->mode_info.load_detect_property)

		return -ENOMEM;

	rdev->mode_info.load_detect_property->values[0] = 0;

	rdev->mode_info.load_detect_property->values[1] = 1;

	drm_mode_create_scaling_mode_property(rdev->ddev);

	sz = ARRAY_SIZE(radeon_tv_std_enum_list);

	rdev->mode_info.tv_std_property =

		drm_property_create(rdev->ddev,

				    DRM_MODE_PROP_ENUM,

				    "tv standard", sz);

	for (i = 0; i < sz; i++) {

		drm_property_add_enum(rdev->mode_info.tv_std_property,

				      i,

				      radeon_tv_std_enum_list[i].type,

				      radeon_tv_std_enum_list[i].name);

	}

	return 0;

}

int radeon_modeset_init(struct radeon_device *rdev)

{

	int num_crtc = 2, i;

	int ret;

	drm_mode_config_init(rdev->ddev);

	rdev->mode_info.mode_config_initialized = true;

    rdev->ddev->mode_config.funcs = (void *)&radeon_mode_funcs;

	if (ASIC_IS_AVIVO(rdev)) {

		rdev->ddev->mode_config.max_width = 8192;

		rdev->ddev->mode_config.max_height = 8192;

	} else {

		rdev->ddev->mode_config.max_width = 4096;

		rdev->ddev->mode_config.max_height = 4096;

	}

	rdev->ddev->mode_config.fb_base = rdev->mc.aper_base;

	ret = radeon_modeset_create_props(rdev);

	if (ret) {

		return ret;

	}

	if (rdev->flags & RADEON_SINGLE_CRTC)

		num_crtc = 1;

	/* allocate crtcs */

	for (i = 0; i < num_crtc; i++) {

		radeon_crtc_init(rdev->ddev, i);

	}

	/* okay we should have all the bios connectors */

	ret = radeon_setup_enc_conn(rdev->ddev);

	if (!ret) {

		return ret;

	}

	/* initialize hpd */

	radeon_hpd_init(rdev);

	drm_helper_initial_config(rdev->ddev);

	return 0;

}

void radeon_modeset_fini(struct radeon_device *rdev)

{

	if (rdev->mode_info.mode_config_initialized) {

		radeon_hpd_fini(rdev);

		drm_mode_config_cleanup(rdev->ddev);

		rdev->mode_info.mode_config_initialized = false;

	}

}

bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,

				struct drm_display_mode *mode,

				struct drm_display_mode *adjusted_mode)

{

	struct drm_device *dev = crtc->dev;

	struct drm_encoder *encoder;

		struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

	struct radeon_encoder *radeon_encoder;

	bool first = true;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {

		radeon_encoder = to_radeon_encoder(encoder);

		if (encoder->crtc != crtc)

			continue;

		if (first) {

			/* set scaling */

			if (radeon_encoder->rmx_type == RMX_OFF)

				radeon_crtc->rmx_type = RMX_OFF;

			else if (mode->hdisplay < radeon_encoder->native_mode.hdisplay ||

				 mode->vdisplay < radeon_encoder->native_mode.vdisplay)

			radeon_crtc->rmx_type = radeon_encoder->rmx_type;

			else

				radeon_crtc->rmx_type = RMX_OFF;

			/* copy native mode */

			memcpy(&radeon_crtc->native_mode,

				&radeon_encoder->native_mode,

				sizeof(struct drm_display_mode));

			first = false;

		} else {

			if (radeon_crtc->rmx_type != radeon_encoder->rmx_type) {

				/* WARNING: Right now this can't happen but

				 * in the future we need to check that scaling

				 * are consistent accross different encoder

				 * (ie all encoder can work with the same

				 *  scaling).

				 */

				DRM_ERROR("Scaling not consistent accross encoder.\n");

				return false;

			}

		}

	}

	if (radeon_crtc->rmx_type != RMX_OFF) {

        fixed20_12 a, b;

		a.full = rfixed_const(crtc->mode.vdisplay);

		b.full = rfixed_const(radeon_crtc->native_mode.hdisplay);

		radeon_crtc->vsc.full = rfixed_div(a, b);

		a.full = rfixed_const(crtc->mode.hdisplay);

		b.full = rfixed_const(radeon_crtc->native_mode.vdisplay);

		radeon_crtc->hsc.full = rfixed_div(a, b);

	} else {

		radeon_crtc->vsc.full = rfixed_const(1);

		radeon_crtc->hsc.full = rfixed_const(1);

	}

	return true;

}