1 files changed, 271 insertions, 113 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 0ec491ead2f..ba8d806dcf3 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -68,6 +68,36 @@ static void avivo_crtc_load_lut(struct drm_crtc *crtc)
 	WREG32(AVIVO_D1GRPH_LUT_SEL + radeon_crtc->crtc_offset, radeon_crtc->crtc_id);
 }
 
+static void evergreen_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(EVERGREEN_DC_LUT_CONTROL + radeon_crtc->crtc_offset, 0);
+
+	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
+	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
+	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);
+
+	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
+	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
+	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);
+
+	WREG32(EVERGREEN_DC_LUT_RW_MODE, radeon_crtc->crtc_id);
+	WREG32(EVERGREEN_DC_LUT_WRITE_EN_MASK, 0x00000007);
+
+	WREG32(EVERGREEN_DC_LUT_RW_INDEX, 0);
+	for (i = 0; i < 256; i++) {
+		WREG32(EVERGREEN_DC_LUT_30_COLOR,
+		       (radeon_crtc->lut_r[i] << 20) |
+		       (radeon_crtc->lut_g[i] << 10) |
+		       (radeon_crtc->lut_b[i] << 0));
+	}
+}
+
 static void legacy_crtc_load_lut(struct drm_crtc *crtc)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
@@ -100,7 +130,9 @@ void radeon_crtc_load_lut(struct drm_crtc *crtc)
 	if (!crtc->enabled)
 		return;
 
-	if (ASIC_IS_AVIVO(rdev))
+	if (ASIC_IS_DCE4(rdev))
+		evergreen_crtc_load_lut(crtc);
+	else if (ASIC_IS_AVIVO(rdev))
 		avivo_crtc_load_lut(crtc);
 	else
 		legacy_crtc_load_lut(crtc);
@@ -278,7 +310,7 @@ static void radeon_print_display_setup(struct drm_device *dev)
 		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)
+		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,
@@ -288,6 +320,15 @@ static void radeon_print_display_setup(struct drm_device *dev)
 				 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);
@@ -352,22 +393,25 @@ static bool radeon_setup_enc_conn(struct drm_device *dev)
 
 int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 {
+	struct drm_device *dev = radeon_connector->base.dev;
+	struct radeon_device *rdev = dev->dev_private;
 	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_i2c_bus)
+		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);
 	}
-
+	/* some servers provide a hardcoded edid in rom for KVMs */
+	if (!radeon_connector->edid)
+		radeon_connector->edid = radeon_combios_get_hardcoded_edid(rdev);
 	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);
@@ -385,9 +429,7 @@ static int radeon_ddc_dump(struct drm_connector *connector)
 
 	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);
 	}
@@ -404,17 +446,18 @@ static inline uint32_t radeon_div(uint64_t n, uint32_t 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,
-			int flags)
+static void radeon_compute_pll_legacy(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;
@@ -430,7 +473,7 @@ void radeon_compute_pll(struct radeon_pll *pll,
 	DRM_DEBUG("PLL freq %llu %u %u\n", freq, pll->min_ref_div, pll->max_ref_div);
 	freq = freq * 1000;
 
-	if (flags & RADEON_PLL_USE_REF_DIV)
+	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) {
@@ -445,19 +488,22 @@ void radeon_compute_pll(struct radeon_pll *pll,
 		}
 	}
 
-	if (flags & RADEON_PLL_USE_FRAC_FB_DIV) {
+	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 = pll->min_post_div; post_div <= pll->max_post_div; ++post_div) {
+	for (post_div = min_post_div; post_div <= max_post_div; ++post_div) {
 		uint32_t ref_div;
 
-		if ((flags & RADEON_PLL_NO_ODD_POST_DIV) && (post_div & 1))
+		if ((pll->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 (pll->flags & RADEON_PLL_LEGACY) {
 			if ((post_div == 5) ||
 			    (post_div == 7) ||
 			    (post_div == 9) ||
@@ -504,7 +550,7 @@ void radeon_compute_pll(struct radeon_pll *pll,
 					tmp += (uint64_t)pll->reference_freq * 1000 * frac_feedback_div;
 					current_freq = radeon_div(tmp, ref_div * post_div);
 
-					if (flags & RADEON_PLL_PREFER_CLOSEST_LOWER) {
+					if (pll->flags & RADEON_PLL_PREFER_CLOSEST_LOWER) {
 						error = freq - current_freq;
 						error = error < 0 ? 0xffffffff : error;
 					} else
@@ -531,12 +577,12 @@ void radeon_compute_pll(struct radeon_pll *pll,
 							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))) {
+						} 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;
@@ -566,96 +612,194 @@ void radeon_compute_pll(struct radeon_pll *pll,
 	*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,
-			      int flags)
+static bool
+calc_fb_div(struct radeon_pll *pll,
+	    uint32_t freq,
+            uint32_t post_div,
+            uint32_t ref_div,
+            uint32_t *fb_div,
+            uint32_t *fb_div_frac)
 {
-	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);
+	fixed20_12 feedback_divider, a, b;
+	u32 vco_freq;
+
+	vco_freq = freq * post_div;
+	/* feedback_divider = vco_freq * ref_div / pll->reference_freq; */
+	a.full = rfixed_const(pll->reference_freq);
+	feedback_divider.full = rfixed_const(vco_freq);
+	feedback_divider.full = rfixed_div(feedback_divider, a);
+	a.full = rfixed_const(ref_div);
+	feedback_divider.full = rfixed_mul(feedback_divider, a);
+
+	if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
+		/* feedback_divider = floor((feedback_divider * 10.0) + 0.5) * 0.1; */
+		a.full = rfixed_const(10);
+		feedback_divider.full = rfixed_mul(feedback_divider, a);
+		feedback_divider.full += rfixed_const_half(0);
+		feedback_divider.full = rfixed_floor(feedback_divider);
+		feedback_divider.full = rfixed_div(feedback_divider, a);
+
+		/* *fb_div = floor(feedback_divider); */
+		a.full = rfixed_floor(feedback_divider);
+		*fb_div = rfixed_trunc(a);
+		/* *fb_div_frac = fmod(feedback_divider, 1.0) * 10.0; */
+		a.full = rfixed_const(10);
+		b.full = rfixed_mul(feedback_divider, a);
+
+		feedback_divider.full = rfixed_floor(feedback_divider);
+		feedback_divider.full = rfixed_mul(feedback_divider, a);
+		feedback_divider.full = b.full - feedback_divider.full;
+		*fb_div_frac = rfixed_trunc(feedback_divider);
+	} else {
+		/* *fb_div = floor(feedback_divider + 0.5); */
+		feedback_divider.full += rfixed_const_half(0);
+		feedback_divider.full = rfixed_floor(feedback_divider);
+
+		*fb_div = rfixed_trunc(feedback_divider);
+		*fb_div_frac = 0;
+	}
+
+	if (((*fb_div) < pll->min_feedback_div) || ((*fb_div) > pll->max_feedback_div))
+		return false;
+	else
+		return true;
+}
+
+static bool
+calc_fb_ref_div(struct radeon_pll *pll,
+		uint32_t freq,
+		uint32_t post_div,
+		uint32_t *fb_div,
+                uint32_t *fb_div_frac,
+                uint32_t *ref_div)
+{
+	fixed20_12 ffreq, max_error, error, pll_out, a;
+	u32 vco;
+
 	ffreq.full = rfixed_const(freq);
-	error.full = rfixed_const(100 * 100);
+	/* max_error = ffreq * 0.0025; */
+	a.full = rfixed_const(400);
+	max_error.full = rfixed_div(ffreq, a);
+
+	for ((*ref_div) = pll->min_ref_div; (*ref_div) < pll->max_ref_div; ++(*ref_div)) {
+		if (calc_fb_div(pll, freq, post_div, (*ref_div), fb_div, fb_div_frac)) {
+			vco = pll->reference_freq * (((*fb_div) * 10) + (*fb_div_frac));
+			vco = vco / ((*ref_div) * 10);
+
+			if ((vco < pll->pll_out_min) || (vco > pll->pll_out_max))
+				continue;
 
-	/* max p */
-	p.full = rfixed_div(pll_out_max, ffreq);
-	p.full = rfixed_floor(p);
+			/* pll_out = vco / post_div; */
+			a.full = rfixed_const(post_div);
+			pll_out.full = rfixed_const(vco);
+			pll_out.full = rfixed_div(pll_out, a);
 
-	/* min m */
-	m.full = rfixed_div(reference_freq, pll_in_max);
-	m.full = rfixed_ceil(m);
+			if (pll_out.full >= ffreq.full) {
+				error.full = pll_out.full - ffreq.full;
+				if (error.full <= max_error.full)
+					return true;
+			}
+		}
+	}
+	return false;
+}
 
-	while (1) {
-		n.full = rfixed_div(ffreq, reference_freq);
-		n.full = rfixed_mul(n, m);
-		n.full = rfixed_mul(n, p);
+static void radeon_compute_pll_new(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)
+{
+	u32 fb_div = 0, fb_div_frac = 0, post_div = 0, ref_div = 0;
+	u32 best_freq = 0, vco_frequency;
 
-		f_vco.full = rfixed_div(n, m);
-		f_vco.full = rfixed_mul(f_vco, reference_freq);
+	/* freq = freq / 10; */
+	do_div(freq, 10);
 
-		f_pclk.full = rfixed_div(f_vco, p);
+	if (pll->flags & RADEON_PLL_USE_POST_DIV) {
+		post_div = pll->post_div;
+		if ((post_div < pll->min_post_div) || (post_div > pll->max_post_div))
+			goto done;
+
+		vco_frequency = freq * post_div;
+		if ((vco_frequency < pll->pll_out_min) || (vco_frequency > pll->pll_out_max))
+			goto done;
+
+		if (pll->flags & RADEON_PLL_USE_REF_DIV) {
+			ref_div = pll->reference_div;
+			if ((ref_div < pll->min_ref_div) || (ref_div > pll->max_ref_div))
+				goto done;
+			if (!calc_fb_div(pll, freq, post_div, ref_div, &fb_div, &fb_div_frac))
+				goto done;
+		}
+	} else {
+		for (post_div = pll->max_post_div; post_div >= pll->min_post_div; --post_div) {
+			if (pll->flags & RADEON_PLL_LEGACY) {
+				if ((post_div == 5) ||
+				    (post_div == 7) ||
+				    (post_div == 9) ||
+				    (post_div == 10) ||
+				    (post_div == 11))
+					continue;
+			}
 
-		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;
+			if ((pll->flags & RADEON_PLL_NO_ODD_POST_DIV) && (post_div & 1))
+				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;
+			vco_frequency = freq * post_div;
+			if ((vco_frequency < pll->pll_out_min) || (vco_frequency > pll->pll_out_max))
+				continue;
+			if (pll->flags & RADEON_PLL_USE_REF_DIV) {
+				ref_div = pll->reference_div;
+				if ((ref_div < pll->min_ref_div) || (ref_div > pll->max_ref_div))
+					goto done;
+				if (calc_fb_div(pll, freq, post_div, ref_div, &fb_div, &fb_div_frac))
+					break;
+			} else {
+				if (calc_fb_ref_div(pll, freq, post_div, &fb_div, &fb_div_frac, &ref_div))
+					break;
+			}
 		}
 	}
 
-	a.full = rfixed_const(10);
-	b.full = rfixed_mul(n, a);
+	best_freq = pll->reference_freq * 10 * fb_div;
+	best_freq += pll->reference_freq * fb_div_frac;
+	best_freq = best_freq / (ref_div * post_div);
 
-	frac_n.full = rfixed_floor(n);
-	frac_n.full = rfixed_mul(frac_n, a);
-	frac_n.full = b.full - frac_n.full;
+done:
+	if (best_freq == 0)
+		DRM_ERROR("Couldn't find valid PLL dividers\n");
 
-	*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);
+	*dot_clock_p = best_freq / 10;
+	*fb_div_p = fb_div;
+	*frac_fb_div_p = fb_div_frac;
+	*ref_div_p = ref_div;
+	*post_div_p = post_div;
+
+	DRM_DEBUG("%u %d.%d, %d, %d\n", *dot_clock_p, *fb_div_p, *frac_fb_div_p, *ref_div_p, *post_div_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);
+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)
+{
+	switch (pll->algo) {
+	case PLL_ALGO_NEW:
+		radeon_compute_pll_new(pll, freq, dot_clock_p, fb_div_p,
+				       frac_fb_div_p, ref_div_p, post_div_p);
+		break;
+	case PLL_ALGO_LEGACY:
+	default:
+		radeon_compute_pll_legacy(pll, freq, dot_clock_p, fb_div_p,
+					  frac_fb_div_p, ref_div_p, post_div_p);
+		break;
+	}
 }
 
 static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb)
@@ -666,12 +810,8 @@ static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb)
 	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);
-	}
+	if (radeon_fb->obj)
+		drm_gem_object_unreference_unlocked(radeon_fb->obj);
 	drm_framebuffer_cleanup(fb);
 	kfree(radeon_fb);
 }
@@ -715,7 +855,11 @@ radeon_user_framebuffer_create(struct drm_device *dev,
 	struct drm_gem_object *obj;
 
 	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
-
+	if (obj ==  NULL) {
+		dev_err(&dev->pdev->dev, "No GEM object associated to handle 0x%08X, "
+			"can't create framebuffer\n", mode_cmd->handle);
+		return NULL;
+	}
 	return radeon_framebuffer_create(dev, mode_cmd, obj);
 }
 
@@ -803,7 +947,7 @@ static int radeon_modeset_create_props(struct radeon_device *rdev)
 
 int radeon_modeset_init(struct radeon_device *rdev)
 {
-	int num_crtc = 2, i;
+	int i;
 	int ret;
 
 	drm_mode_config_init(rdev->ddev);
@@ -826,11 +970,23 @@ int radeon_modeset_init(struct radeon_device *rdev)
 		return ret;
 	}
 
+	/* check combios for a valid hardcoded EDID - Sun servers */
+	if (!rdev->is_atom_bios) {
+		/* check for hardcoded EDID in BIOS */
+		radeon_combios_check_hardcoded_edid(rdev);
+	}
+
 	if (rdev->flags & RADEON_SINGLE_CRTC)
-		num_crtc = 1;
+		rdev->num_crtc = 1;
+	else {
+		if (ASIC_IS_DCE4(rdev))
+			rdev->num_crtc = 6;
+		else
+			rdev->num_crtc = 2;
+	}
 
 	/* allocate crtcs */
-	for (i = 0; i < num_crtc; i++) {
+	for (i = 0; i < rdev->num_crtc; i++) {
 		radeon_crtc_init(rdev->ddev, i);
 	}
 
@@ -847,6 +1003,8 @@ int radeon_modeset_init(struct radeon_device *rdev)
 
 void radeon_modeset_fini(struct radeon_device *rdev)
 {
+	kfree(rdev->mode_info.bios_hardcoded_edid);
+
 	if (rdev->mode_info.mode_config_initialized) {
 		radeon_hpd_fini(rdev);
 		drm_mode_config_cleanup(rdev->ddev);