drm/linux-core/radeon_display.c

/*
 * 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"
#include "drm_edid.h"

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);
}

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 drm_radeon_private *dev_priv = dev->dev_private;
	int i;
	uint32_t dac2_cntl;

	dac2_cntl = RADEON_READ(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;
	RADEON_WRITE(RADEON_DAC_CNTL2, dac2_cntl);

	for (i = 0; i < 256; i++) {
		RADEON_WRITE8(RADEON_PALETTE_INDEX, i);
		RADEON_WRITE(RADEON_PALETTE_DATA,
			     (radeon_crtc->lut_r[i] << 16) |
			     (radeon_crtc->lut_g[i] << 8) |
			     (radeon_crtc->lut_b[i] << 0));
	}
}

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;

	if (!crtc->enabled)
		return;

	if (radeon_is_avivo(dev_priv))
		avivo_crtc_load_lut(crtc);
	else
		legacy_crtc_load_lut(crtc);
}

/** 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;
}

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, j;

	if (size != 256)
		return;

	if (crtc->fb->depth == 16) {
		for (i = 0; i < 64; i++) {
			if (i <= 31) {
				for (j = 0; j < 8; j++) {
					radeon_crtc->lut_r[i * 8 + j] = red[i] >> 8;
					radeon_crtc->lut_b[i * 8 + j] = blue[i] >> 8;
				}
			}
			for (j = 0; j < 4; j++)
				radeon_crtc->lut_g[i * 4 + j] = green[i] >> 8;
		}
	} else {
		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_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 && (radeon_is_avivo(dev_priv) || radeon_r4xx_atom))
		radeon_atombios_init_crtc(dev, radeon_crtc);
	else
		radeon_legacy_init_crtc(dev, radeon_crtc);
}

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) || radeon_r4xx_atom)
				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) || radeon_r4xx_atom)
				encoder = radeon_encoder_atom_dac_add(dev, i, mode_info->bios_connector[i].dac_type, 0);
			else {
				if (mode_info->bios_connector[i].dac_type == DAC_PRIMARY)
					encoder = radeon_encoder_legacy_primary_dac_add(dev, i, 0);
				else if (mode_info->bios_connector[i].dac_type == DAC_TVDAC)
					encoder = radeon_encoder_legacy_tv_dac_add(dev, i, 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) ||
		    (mode_info->bios_connector[i].connector_type == CONNECTOR_HDMI_TYPE_A) ||
		    (mode_info->bios_connector[i].connector_type == CONNECTOR_HDMI_TYPE_B)) {
			if (radeon_is_avivo(dev_priv) || radeon_r4xx_atom)
				encoder = radeon_encoder_atom_tmds_add(dev, i, mode_info->bios_connector[i].tmds_type);
			else {
				if (mode_info->bios_connector[i].tmds_type == TMDS_INT)
					encoder = radeon_encoder_legacy_tmds_int_add(dev, i);
				else if (mode_info->bios_connector[i].tmds_type == TMDS_EXT)
					encoder = radeon_encoder_legacy_tmds_ext_add(dev, i);
			}
			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) || radeon_r4xx_atom)
				encoder = radeon_encoder_atom_dac_add(dev, i, mode_info->bios_connector[i].dac_type, 1);
			else {
				if (mode_info->bios_connector[i].dac_type == DAC_TVDAC)
					encoder = radeon_encoder_legacy_tv_dac_add(dev, i, 0);
			}
			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;
}

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;
	radeon_i2c_do_lock(radeon_connector, 1);
	edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
	radeon_i2c_do_lock(radeon_connector, 0);
	if (edid) {
		/* update digital bits here */
		if (edid->digital)
			radeon_connector->use_digital = 1;
		else
			radeon_connector->use_digital = 0;
		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;
	radeon_i2c_do_lock(radeon_connector, 1);
	edid = drm_get_edid(connector, &radeon_connector->ddc_bus->adapter);
	radeon_i2c_do_lock(radeon_connector, 0);
	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) ||
			    (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, 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)) ||
						   ((flags & RADEON_PLL_PREFER_HIGH_REF_DIV) && (ref_div > best_ref_div)) ||
						   ((flags & RADEON_PLL_PREFER_LOW_FB_DIV) && (feedback_div < best_feedback_div)) ||
						   ((flags & RADEON_PLL_PREFER_HIGH_FB_DIV) && (feedback_div > best_feedback_div)) ||
						   ((flags & RADEON_PLL_PREFER_LOW_POST_DIV) && (post_div < best_post_div)) ||
						   ((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_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 *p1pll = &dev_priv->mode_info.p1pll;
	struct radeon_pll *p2pll = &dev_priv->mode_info.p2pll;
	struct radeon_pll *spll = &dev_priv->mode_info.spll;
	struct radeon_pll *mpll = &dev_priv->mode_info.mpll;
	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 (p1pll->reference_div < 2)
			p1pll->reference_div = 12;
		if (p2pll->reference_div < 2)
			p2pll->reference_div = 12;
	} else {
		// TODO FALLBACK
	}

	/* pixel clocks */
	if (radeon_is_avivo(dev_priv)) {
		p1pll->min_post_div = 2;
		p1pll->max_post_div = 0x7f;
		p2pll->min_post_div = 2;
		p2pll->max_post_div = 0x7f;
	} else {
		p1pll->min_post_div = 1;
		p1pll->max_post_div = 16;
		p2pll->min_post_div = 1;
		p2pll->max_post_div = 12;
	}

	p1pll->min_ref_div = 2;
	p1pll->max_ref_div = 0x3ff;
	p1pll->min_feedback_div = 4;
	p1pll->max_feedback_div = 0x7ff;
	p1pll->best_vco = 0;

	p2pll->min_ref_div = 2;
	p2pll->max_ref_div = 0x3ff;
	p2pll->min_feedback_div = 4;
	p2pll->max_feedback_div = 0x7ff;
	p2pll->best_vco = 0;

	/* system clock */
	spll->min_post_div = 1;
	spll->max_post_div = 1;
	spll->min_ref_div = 2;
	spll->max_ref_div = 0xff;
	spll->min_feedback_div = 4;
	spll->max_feedback_div = 0xff;
	spll->best_vco = 0;

	/* memory clock */
	mpll->min_post_div = 1;
	mpll->max_post_div = 1;
	mpll->min_ref_div = 2;
	mpll->max_ref_div = 0xff;
	mpll->min_feedback_div = 4;
	mpll->max_feedback_div = 0xff;
	mpll->best_vco = 0;

}

/* not sure of the best place for these */
/* 10 khz */
void radeon_legacy_set_engine_clock(struct drm_device *dev, int eng_clock)
{
	struct drm_radeon_private *dev_priv = dev->dev_private;
	struct radeon_mode_info *mode_info = &dev_priv->mode_info;
	struct radeon_pll *spll = &mode_info->spll;
	uint32_t ref_div, fb_div;
	uint32_t m_spll_ref_fb_div;

	/* FIXME wait for idle */

	m_spll_ref_fb_div = RADEON_READ_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV);
	m_spll_ref_fb_div &= ((RADEON_M_SPLL_REF_DIV_MASK << RADEON_M_SPLL_REF_DIV_SHIFT) |
			      (RADEON_MPLL_FB_DIV_MASK << RADEON_MPLL_FB_DIV_SHIFT));
	ref_div = m_spll_ref_fb_div & RADEON_M_SPLL_REF_DIV_MASK;

	fb_div = radeon_div(eng_clock * ref_div, spll->reference_freq);
	m_spll_ref_fb_div |= (fb_div & RADEON_SPLL_FB_DIV_MASK) << RADEON_SPLL_FB_DIV_SHIFT;
	RADEON_WRITE_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV, m_spll_ref_fb_div);

}

/* 10 khz */
void radeon_legacy_set_memory_clock(struct drm_device *dev, int mem_clock)
{
	struct drm_radeon_private *dev_priv = dev->dev_private;
	struct radeon_mode_info *mode_info = &dev_priv->mode_info;
	struct radeon_pll *mpll = &mode_info->mpll;
	uint32_t ref_div, fb_div;
	uint32_t m_spll_ref_fb_div;

	/* FIXME wait for idle */

	m_spll_ref_fb_div = RADEON_READ_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV);
	m_spll_ref_fb_div &= ((RADEON_M_SPLL_REF_DIV_MASK << RADEON_M_SPLL_REF_DIV_SHIFT) |
			      (RADEON_SPLL_FB_DIV_MASK << RADEON_SPLL_FB_DIV_SHIFT));
	ref_div = m_spll_ref_fb_div & RADEON_M_SPLL_REF_DIV_MASK;

	fb_div = radeon_div(mem_clock * ref_div, mpll->reference_freq);
	m_spll_ref_fb_div |= (fb_div & RADEON_MPLL_FB_DIV_MASK) << RADEON_MPLL_FB_DIV_SHIFT;
	RADEON_WRITE_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV, m_spll_ref_fb_div);

}

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) {
		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 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)
		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 radeon_framebuffer *radeon_fb;
 	struct drm_gem_object *obj;

 	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,
};


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);
}