drivers/gpu/drm/nouveau/nv50_sor.c - arm/linux - Git at Google

 /*
  * Copyright (C) 2008 Maarten Maathuis.
  * All Rights Reserved.
  *
  * 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
  *
  */

 #include "drmP.h"
 #include "drm_crtc_helper.h"

 #define NOUVEAU_DMA_DEBUG (nouveau_reg_debug & NOUVEAU_REG_DEBUG_EVO)
 #include "nouveau_reg.h"
 #include "nouveau_drv.h"
 #include "nouveau_dma.h"
 #include "nouveau_encoder.h"
 #include "nouveau_connector.h"
 #include "nouveau_crtc.h"
 #include "nv50_display.h"

 static u32
 nv50_sor_dp_lane_map(struct drm_device *dev, struct dcb_entry *dcb, u8 lane)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	static const u8 nvaf[] = { 24, 16, 8, 0 }; /* thanks, apple.. */
 	static const u8 nv50[] = { 16, 8, 0, 24 };
 	if (dev_priv->chipset == 0xaf)
 		return nvaf[lane];
 	return nv50[lane];
 }

 static void
 nv50_sor_dp_train_set(struct drm_device *dev, struct dcb_entry *dcb, u8 pattern)
 {
 	u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
 	nv_mask(dev, NV50_SOR_DP_CTRL(or, link), 0x0f000000, pattern << 24);
 }

 static void
 nv50_sor_dp_train_adj(struct drm_device *dev, struct dcb_entry *dcb,
 		      u8 lane, u8 swing, u8 preem)
 {
 	u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
 	u32 shift = nv50_sor_dp_lane_map(dev, dcb, lane);
 	u32 mask = 0x000000ff << shift;
 	u8 *table, *entry, *config;

 	table = nouveau_dp_bios_data(dev, dcb, &entry);
 	if (!table || (table[0] != 0x20 && table[0] != 0x21)) {
 		NV_ERROR(dev, "PDISP: unsupported DP table for chipset\n");
 		return;
 	}

 	config = entry + table[4];
 	while (config[0] != swing || config[1] != preem) {
 		config += table[5];
 		if (config >= entry + table[4] + entry[4] * table[5])
 			return;
 	}

 	nv_mask(dev, NV50_SOR_DP_UNK118(or, link), mask, config[2] << shift);
 	nv_mask(dev, NV50_SOR_DP_UNK120(or, link), mask, config[3] << shift);
 	nv_mask(dev, NV50_SOR_DP_UNK130(or, link), 0x0000ff00, config[4] << 8);
 }

 static void
 nv50_sor_dp_link_set(struct drm_device *dev, struct dcb_entry *dcb, int crtc,
 		     int link_nr, u32 link_bw, bool enhframe)
 {
 	u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
 	u32 dpctrl = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link)) & ~0x001f4000;
 	u32 clksor = nv_rd32(dev, 0x614300 + (or * 0x800)) & ~0x000c0000;
 	u8 *table, *entry, mask;
 	int i;

 	table = nouveau_dp_bios_data(dev, dcb, &entry);
 	if (!table || (table[0] != 0x20 && table[0] != 0x21)) {
 		NV_ERROR(dev, "PDISP: unsupported DP table for chipset\n");
 		return;
 	}

 	entry = ROMPTR(dev, entry[10]);
 	if (entry) {
 		while (link_bw < ROM16(entry[0]) * 10)
 			entry += 4;

 		nouveau_bios_run_init_table(dev, ROM16(entry[2]), dcb, crtc);
 	}

 	dpctrl |= ((1 << link_nr) - 1) << 16;
 	if (enhframe)
 		dpctrl |= 0x00004000;

 	if (link_bw > 162000)
 		clksor |= 0x00040000;

 	nv_wr32(dev, 0x614300 + (or * 0x800), clksor);
 	nv_wr32(dev, NV50_SOR_DP_CTRL(or, link), dpctrl);

 	mask = 0;
 	for (i = 0; i < link_nr; i++)
 		mask |= 1 << (nv50_sor_dp_lane_map(dev, dcb, i) >> 3);
 	nv_mask(dev, NV50_SOR_DP_UNK130(or, link), 0x0000000f, mask);
 }

 static void
 nv50_sor_dp_link_get(struct drm_device *dev, u32 or, u32 link, u32 *nr, u32 *bw)
 {
 	u32 dpctrl = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link)) & 0x000f0000;
 	u32 clksor = nv_rd32(dev, 0x614300 + (or * 0x800));
 	if (clksor & 0x000c0000)
 		*bw = 270000;
 	else
 		*bw = 162000;

 	if      (dpctrl > 0x00030000) *nr = 4;
 	else if (dpctrl > 0x00010000) *nr = 2;
 	else			      *nr = 1;
 }

 void
 nv50_sor_dp_calc_tu(struct drm_device *dev, int or, int link, u32 clk, u32 bpp)
 {
 	const u32 symbol = 100000;
 	int bestTU = 0, bestVTUi = 0, bestVTUf = 0, bestVTUa = 0;
 	int TU, VTUi, VTUf, VTUa;
 	u64 link_data_rate, link_ratio, unk;
 	u32 best_diff = 64 * symbol;
 	u32 link_nr, link_bw, r;

 	/* calculate packed data rate for each lane */
 	nv50_sor_dp_link_get(dev, or, link, &link_nr, &link_bw);
 	link_data_rate = (clk * bpp / 8) / link_nr;

 	/* calculate ratio of packed data rate to link symbol rate */
 	link_ratio = link_data_rate * symbol;
 	r = do_div(link_ratio, link_bw);

 	for (TU = 64; TU >= 32; TU--) {
 		/* calculate average number of valid symbols in each TU */
 		u32 tu_valid = link_ratio * TU;
 		u32 calc, diff;

 		/* find a hw representation for the fraction.. */
 		VTUi = tu_valid / symbol;
 		calc = VTUi * symbol;
 		diff = tu_valid - calc;
 		if (diff) {
 			if (diff >= (symbol / 2)) {
 				VTUf = symbol / (symbol - diff);
 				if (symbol - (VTUf * diff))
 					VTUf++;

 				if (VTUf <= 15) {
 					VTUa  = 1;
 					calc += symbol - (symbol / VTUf);
 				} else {
 					VTUa  = 0;
 					VTUf  = 1;
 					calc += symbol;
 				}
 			} else {
 				VTUa  = 0;
 				VTUf  = min((int)(symbol / diff), 15);
 				calc += symbol / VTUf;
 			}

 			diff = calc - tu_valid;
 		} else {
 			/* no remainder, but the hw doesn't like the fractional
 			 * part to be zero.  decrement the integer part and
 			 * have the fraction add a whole symbol back
 			 */
 			VTUa = 0;
 			VTUf = 1;
 			VTUi--;
 		}

 		if (diff < best_diff) {
 			best_diff = diff;
 			bestTU = TU;
 			bestVTUa = VTUa;
 			bestVTUf = VTUf;
 			bestVTUi = VTUi;
 			if (diff == 0)
 				break;
 		}
 	}

 	if (!bestTU) {
 		NV_ERROR(dev, "DP: unable to find suitable config\n");
 		return;
 	}

 	/* XXX close to vbios numbers, but not right */
 	unk  = (symbol - link_ratio) * bestTU;
 	unk *= link_ratio;
 	r = do_div(unk, symbol);
 	r = do_div(unk, symbol);
 	unk += 6;

 	nv_mask(dev, NV50_SOR_DP_CTRL(or, link), 0x000001fc, bestTU << 2);
 	nv_mask(dev, NV50_SOR_DP_SCFG(or, link), 0x010f7f3f, bestVTUa << 24 |
 							     bestVTUf << 16 |
 							     bestVTUi << 8 |
 							     unk);
 }
 static void
 nv50_sor_disconnect(struct drm_encoder *encoder)
 {
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 	struct drm_device *dev = encoder->dev;
 	struct nouveau_channel *evo = nv50_display(dev)->master;
 	int ret;

 	if (!nv_encoder->crtc)
 		return;
 	nv50_crtc_blank(nouveau_crtc(nv_encoder->crtc), true);

 	NV_DEBUG_KMS(dev, "Disconnecting SOR %d\n", nv_encoder->or);

 	ret = RING_SPACE(evo, 4);
 	if (ret) {
 		NV_ERROR(dev, "no space while disconnecting SOR\n");
 		return;
 	}
 	BEGIN_RING(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
 	OUT_RING  (evo, 0);
 	BEGIN_RING(evo, 0, NV50_EVO_UPDATE, 1);
 	OUT_RING  (evo, 0);

 	nouveau_hdmi_mode_set(encoder, NULL);

 	nv_encoder->crtc = NULL;
 	nv_encoder->last_dpms = DRM_MODE_DPMS_OFF;
 }

 static void
 nv50_sor_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_device *dev = encoder->dev;
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 	struct drm_encoder *enc;
 	uint32_t val;
 	int or = nv_encoder->or;

 	NV_DEBUG_KMS(dev, "or %d type %d mode %d\n", or, nv_encoder->dcb->type, mode);

 	nv_encoder->last_dpms = mode;
 	list_for_each_entry(enc, &dev->mode_config.encoder_list, head) {
 		struct nouveau_encoder *nvenc = nouveau_encoder(enc);

 		if (nvenc == nv_encoder ||
 		    (nvenc->dcb->type != OUTPUT_TMDS &&
 		     nvenc->dcb->type != OUTPUT_LVDS &&
 		     nvenc->dcb->type != OUTPUT_DP) ||
 		    nvenc->dcb->or != nv_encoder->dcb->or)
 			continue;

 		if (nvenc->last_dpms == DRM_MODE_DPMS_ON)
 			return;
 	}

 	/* wait for it to be done */
 	if (!nv_wait(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or),
 		     NV50_PDISPLAY_SOR_DPMS_CTRL_PENDING, 0)) {
 		NV_ERROR(dev, "timeout: SOR_DPMS_CTRL_PENDING(%d) == 0\n", or);
 		NV_ERROR(dev, "SOR_DPMS_CTRL(%d) = 0x%08x\n", or,
 			 nv_rd32(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or)));
 	}

 	val = nv_rd32(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or));

 	if (mode == DRM_MODE_DPMS_ON)
 		val |= NV50_PDISPLAY_SOR_DPMS_CTRL_ON;
 	else
 		val &= ~NV50_PDISPLAY_SOR_DPMS_CTRL_ON;

 	nv_wr32(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or), val |
 		NV50_PDISPLAY_SOR_DPMS_CTRL_PENDING);
 	if (!nv_wait(dev, NV50_PDISPLAY_SOR_DPMS_STATE(or),
 		     NV50_PDISPLAY_SOR_DPMS_STATE_WAIT, 0)) {
 		NV_ERROR(dev, "timeout: SOR_DPMS_STATE_WAIT(%d) == 0\n", or);
 		NV_ERROR(dev, "SOR_DPMS_STATE(%d) = 0x%08x\n", or,
 			 nv_rd32(dev, NV50_PDISPLAY_SOR_DPMS_STATE(or)));
 	}

 	if (nv_encoder->dcb->type == OUTPUT_DP) {
 		struct dp_train_func func = {
 			.link_set = nv50_sor_dp_link_set,
 			.train_set = nv50_sor_dp_train_set,
 			.train_adj = nv50_sor_dp_train_adj
 		};

 		nouveau_dp_dpms(encoder, mode, nv_encoder->dp.datarate, &func);
 	}
 }

 static void
 nv50_sor_save(struct drm_encoder *encoder)
 {
 	NV_ERROR(encoder->dev, "!!\n");
 }

 static void
 nv50_sor_restore(struct drm_encoder *encoder)
 {
 	NV_ERROR(encoder->dev, "!!\n");
 }

 static bool
 nv50_sor_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
 		    struct drm_display_mode *adjusted_mode)
 {
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 	struct nouveau_connector *connector;

 	NV_DEBUG_KMS(encoder->dev, "or %d\n", nv_encoder->or);

 	connector = nouveau_encoder_connector_get(nv_encoder);
 	if (!connector) {
 		NV_ERROR(encoder->dev, "Encoder has no connector\n");
 		return false;
 	}

 	if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
 	     connector->native_mode)
 		drm_mode_copy(adjusted_mode, connector->native_mode);

 	return true;
 }

 static void
 nv50_sor_prepare(struct drm_encoder *encoder)
 {
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 	nv50_sor_disconnect(encoder);
 	if (nv_encoder->dcb->type == OUTPUT_DP) {
 		/* avoid race between link training and supervisor intr */
 		nv50_display_sync(encoder->dev);
 	}
 }

 static void
 nv50_sor_commit(struct drm_encoder *encoder)
 {
 }

 static void
 nv50_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *umode,
 		  struct drm_display_mode *mode)
 {
 	struct nouveau_channel *evo = nv50_display(encoder->dev)->master;
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 	struct drm_device *dev = encoder->dev;
 	struct nouveau_crtc *crtc = nouveau_crtc(encoder->crtc);
 	struct nouveau_connector *nv_connector;
 	uint32_t mode_ctl = 0;
 	int ret;

 	NV_DEBUG_KMS(dev, "or %d type %d -> crtc %d\n",
 		     nv_encoder->or, nv_encoder->dcb->type, crtc->index);
 	nv_encoder->crtc = encoder->crtc;

 	switch (nv_encoder->dcb->type) {
 	case OUTPUT_TMDS:
 		if (nv_encoder->dcb->sorconf.link & 1) {
 			if (mode->clock < 165000)
 				mode_ctl = 0x0100;
 			else
 				mode_ctl = 0x0500;
 		} else
 			mode_ctl = 0x0200;

 		nouveau_hdmi_mode_set(encoder, mode);
 		break;
 	case OUTPUT_DP:
 		nv_connector = nouveau_encoder_connector_get(nv_encoder);
 		if (nv_connector && nv_connector->base.display_info.bpc == 6) {
 			nv_encoder->dp.datarate = mode->clock * 18 / 8;
 			mode_ctl |= 0x00020000;
 		} else {
 			nv_encoder->dp.datarate = mode->clock * 24 / 8;
 			mode_ctl |= 0x00050000;
 		}

 		if (nv_encoder->dcb->sorconf.link & 1)
 			mode_ctl |= 0x00000800;
 		else
 			mode_ctl |= 0x00000900;
 		break;
 	default:
 		break;
 	}

 	if (crtc->index == 1)
 		mode_ctl |= NV50_EVO_SOR_MODE_CTRL_CRTC1;
 	else
 		mode_ctl |= NV50_EVO_SOR_MODE_CTRL_CRTC0;

 	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 		mode_ctl |= NV50_EVO_SOR_MODE_CTRL_NHSYNC;

 	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
 		mode_ctl |= NV50_EVO_SOR_MODE_CTRL_NVSYNC;

 	nv50_sor_dpms(encoder, DRM_MODE_DPMS_ON);

 	ret = RING_SPACE(evo, 2);
 	if (ret) {
 		NV_ERROR(dev, "no space while connecting SOR\n");
 		nv_encoder->crtc = NULL;
 		return;
 	}
 	BEGIN_RING(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
 	OUT_RING(evo, mode_ctl);
 }

 static struct drm_crtc *
 nv50_sor_crtc_get(struct drm_encoder *encoder)
 {
 	return nouveau_encoder(encoder)->crtc;
 }

 static const struct drm_encoder_helper_funcs nv50_sor_helper_funcs = {
 	.dpms = nv50_sor_dpms,
 	.save = nv50_sor_save,
 	.restore = nv50_sor_restore,
 	.mode_fixup = nv50_sor_mode_fixup,
 	.prepare = nv50_sor_prepare,
 	.commit = nv50_sor_commit,
 	.mode_set = nv50_sor_mode_set,
 	.get_crtc = nv50_sor_crtc_get,
 	.detect = NULL,
 	.disable = nv50_sor_disconnect
 };

 static void
 nv50_sor_destroy(struct drm_encoder *encoder)
 {
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);

 	if (!encoder)
 		return;

 	NV_DEBUG_KMS(encoder->dev, "\n");

 	drm_encoder_cleanup(encoder);

 	kfree(nv_encoder);
 }

 static const struct drm_encoder_funcs nv50_sor_encoder_funcs = {
 	.destroy = nv50_sor_destroy,
 };

 int
 nv50_sor_create(struct drm_connector *connector, struct dcb_entry *entry)
 {
 	struct nouveau_encoder *nv_encoder = NULL;
 	struct drm_device *dev = connector->dev;
 	struct drm_encoder *encoder;
 	int type;

 	NV_DEBUG_KMS(dev, "\n");

 	switch (entry->type) {
 	case OUTPUT_TMDS:
 	case OUTPUT_DP:
 		type = DRM_MODE_ENCODER_TMDS;
 		break;
 	case OUTPUT_LVDS:
 		type = DRM_MODE_ENCODER_LVDS;
 		break;
 	default:
 		return -EINVAL;
 	}

 	nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 	if (!nv_encoder)
 		return -ENOMEM;
 	encoder = to_drm_encoder(nv_encoder);

 	nv_encoder->dcb = entry;
 	nv_encoder->or = ffs(entry->or) - 1;
 	nv_encoder->last_dpms = DRM_MODE_DPMS_OFF;

 	drm_encoder_init(dev, encoder, &nv50_sor_encoder_funcs, type);
 	drm_encoder_helper_add(encoder, &nv50_sor_helper_funcs);

 	encoder->possible_crtcs = entry->heads;
 	encoder->possible_clones = 0;

 	drm_mode_connector_attach_encoder(connector, encoder);
 	return 0;
 }
	/*
	* Copyright (C) 2008 Maarten Maathuis.
	* All Rights Reserved.
	*
	* 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
	*
	*/

	#include "drmP.h"
	#include "drm_crtc_helper.h"

	#define NOUVEAU_DMA_DEBUG (nouveau_reg_debug & NOUVEAU_REG_DEBUG_EVO)
	#include "nouveau_reg.h"
	#include "nouveau_drv.h"
	#include "nouveau_dma.h"
	#include "nouveau_encoder.h"
	#include "nouveau_connector.h"
	#include "nouveau_crtc.h"
	#include "nv50_display.h"

	static u32
	nv50_sor_dp_lane_map(struct drm_device dev, struct dcb_entry dcb, u8 lane)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	static const u8 nvaf[] = { 24, 16, 8, 0 }; /* thanks, apple.. */
	static const u8 nv50[] = { 16, 8, 0, 24 };
	if (dev_priv->chipset == 0xaf)
	return nvaf[lane];
	return nv50[lane];
	}

	static void
	nv50_sor_dp_train_set(struct drm_device dev, struct dcb_entry dcb, u8 pattern)
	{
	u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
	nv_mask(dev, NV50_SOR_DP_CTRL(or, link), 0x0f000000, pattern << 24);
	}

	static void
	nv50_sor_dp_train_adj(struct drm_device dev, struct dcb_entry dcb,
	u8 lane, u8 swing, u8 preem)
	{
	u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
	u32 shift = nv50_sor_dp_lane_map(dev, dcb, lane);
	u32 mask = 0x000000ff << shift;
	u8 table, entry, *config;

	table = nouveau_dp_bios_data(dev, dcb, &entry);
	if (!table \|\| (table[0] != 0x20 && table[0] != 0x21)) {
	NV_ERROR(dev, "PDISP: unsupported DP table for chipset\n");
	return;
	}

	config = entry + table[4];
	while (config[0] != swing \|\| config[1] != preem) {
	config += table[5];
	if (config >= entry + table[4] + entry[4] * table[5])
	return;
	}

	nv_mask(dev, NV50_SOR_DP_UNK118(or, link), mask, config[2] << shift);
	nv_mask(dev, NV50_SOR_DP_UNK120(or, link), mask, config[3] << shift);
	nv_mask(dev, NV50_SOR_DP_UNK130(or, link), 0x0000ff00, config[4] << 8);
	}

	static void
	nv50_sor_dp_link_set(struct drm_device dev, struct dcb_entry dcb, int crtc,
	int link_nr, u32 link_bw, bool enhframe)
	{
	u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
	u32 dpctrl = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link)) & ~0x001f4000;
	u32 clksor = nv_rd32(dev, 0x614300 + (or * 0x800)) & ~0x000c0000;
	u8 table, entry, mask;
	int i;

	table = nouveau_dp_bios_data(dev, dcb, &entry);
	if (!table \|\| (table[0] != 0x20 && table[0] != 0x21)) {
	NV_ERROR(dev, "PDISP: unsupported DP table for chipset\n");
	return;
	}

	entry = ROMPTR(dev, entry[10]);
	if (entry) {
	while (link_bw < ROM16(entry[0]) * 10)
	entry += 4;

	nouveau_bios_run_init_table(dev, ROM16(entry[2]), dcb, crtc);
	}

	dpctrl \|= ((1 << link_nr) - 1) << 16;
	if (enhframe)
	dpctrl \|= 0x00004000;

	if (link_bw > 162000)
	clksor \|= 0x00040000;

	nv_wr32(dev, 0x614300 + (or * 0x800), clksor);
	nv_wr32(dev, NV50_SOR_DP_CTRL(or, link), dpctrl);

	mask = 0;
	for (i = 0; i < link_nr; i++)
	mask \|= 1 << (nv50_sor_dp_lane_map(dev, dcb, i) >> 3);
	nv_mask(dev, NV50_SOR_DP_UNK130(or, link), 0x0000000f, mask);
	}

	static void
	nv50_sor_dp_link_get(struct drm_device dev, u32 or, u32 link, u32 nr, u32 *bw)
	{
	u32 dpctrl = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link)) & 0x000f0000;
	u32 clksor = nv_rd32(dev, 0x614300 + (or * 0x800));
	if (clksor & 0x000c0000)
	*bw = 270000;
	else
	*bw = 162000;

	if (dpctrl > 0x00030000) *nr = 4;
	else if (dpctrl > 0x00010000) *nr = 2;
	else *nr = 1;
	}

	void
	nv50_sor_dp_calc_tu(struct drm_device *dev, int or, int link, u32 clk, u32 bpp)
	{
	const u32 symbol = 100000;
	int bestTU = 0, bestVTUi = 0, bestVTUf = 0, bestVTUa = 0;
	int TU, VTUi, VTUf, VTUa;
	u64 link_data_rate, link_ratio, unk;
	u32 best_diff = 64 * symbol;
	u32 link_nr, link_bw, r;

	/* calculate packed data rate for each lane */
	nv50_sor_dp_link_get(dev, or, link, &link_nr, &link_bw);
	link_data_rate = (clk * bpp / 8) / link_nr;

	/* calculate ratio of packed data rate to link symbol rate */
	link_ratio = link_data_rate * symbol;
	r = do_div(link_ratio, link_bw);

	for (TU = 64; TU >= 32; TU--) {
	/* calculate average number of valid symbols in each TU */
	u32 tu_valid = link_ratio * TU;
	u32 calc, diff;

	/* find a hw representation for the fraction.. */
	VTUi = tu_valid / symbol;
	calc = VTUi * symbol;
	diff = tu_valid - calc;
	if (diff) {
	if (diff >= (symbol / 2)) {
	VTUf = symbol / (symbol - diff);
	if (symbol - (VTUf * diff))
	VTUf++;

	if (VTUf <= 15) {
	VTUa = 1;
	calc += symbol - (symbol / VTUf);
	} else {
	VTUa = 0;
	VTUf = 1;
	calc += symbol;
	}
	} else {
	VTUa = 0;
	VTUf = min((int)(symbol / diff), 15);
	calc += symbol / VTUf;
	}

	diff = calc - tu_valid;
	} else {
	/* no remainder, but the hw doesn't like the fractional
	* part to be zero. decrement the integer part and
	* have the fraction add a whole symbol back
	*/
	VTUa = 0;
	VTUf = 1;
	VTUi--;
	}

	if (diff < best_diff) {
	best_diff = diff;
	bestTU = TU;
	bestVTUa = VTUa;
	bestVTUf = VTUf;
	bestVTUi = VTUi;
	if (diff == 0)
	break;
	}
	}

	if (!bestTU) {
	NV_ERROR(dev, "DP: unable to find suitable config\n");
	return;
	}

	/* XXX close to vbios numbers, but not right */
	unk = (symbol - link_ratio) * bestTU;
	unk *= link_ratio;
	r = do_div(unk, symbol);
	r = do_div(unk, symbol);
	unk += 6;

	nv_mask(dev, NV50_SOR_DP_CTRL(or, link), 0x000001fc, bestTU << 2);
	nv_mask(dev, NV50_SOR_DP_SCFG(or, link), 0x010f7f3f, bestVTUa << 24 \|
	bestVTUf << 16 \|
	bestVTUi << 8 \|
	unk);
	}
	static void
	nv50_sor_disconnect(struct drm_encoder *encoder)
	{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct drm_device *dev = encoder->dev;
	struct nouveau_channel *evo = nv50_display(dev)->master;
	int ret;

	if (!nv_encoder->crtc)
	return;
	nv50_crtc_blank(nouveau_crtc(nv_encoder->crtc), true);

	NV_DEBUG_KMS(dev, "Disconnecting SOR %d\n", nv_encoder->or);

	ret = RING_SPACE(evo, 4);
	if (ret) {
	NV_ERROR(dev, "no space while disconnecting SOR\n");
	return;
	}
	BEGIN_RING(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
	OUT_RING (evo, 0);
	BEGIN_RING(evo, 0, NV50_EVO_UPDATE, 1);
	OUT_RING (evo, 0);

	nouveau_hdmi_mode_set(encoder, NULL);

	nv_encoder->crtc = NULL;
	nv_encoder->last_dpms = DRM_MODE_DPMS_OFF;
	}

	static void
	nv50_sor_dpms(struct drm_encoder *encoder, int mode)
	{
	struct drm_device *dev = encoder->dev;
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct drm_encoder *enc;
	uint32_t val;
	int or = nv_encoder->or;

	NV_DEBUG_KMS(dev, "or %d type %d mode %d\n", or, nv_encoder->dcb->type, mode);

	nv_encoder->last_dpms = mode;
	list_for_each_entry(enc, &dev->mode_config.encoder_list, head) {
	struct nouveau_encoder *nvenc = nouveau_encoder(enc);

	if (nvenc == nv_encoder \|\|
	(nvenc->dcb->type != OUTPUT_TMDS &&
	nvenc->dcb->type != OUTPUT_LVDS &&
	nvenc->dcb->type != OUTPUT_DP) \|\|
	nvenc->dcb->or != nv_encoder->dcb->or)
	continue;

	if (nvenc->last_dpms == DRM_MODE_DPMS_ON)
	return;
	}

	/* wait for it to be done */
	if (!nv_wait(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or),
	NV50_PDISPLAY_SOR_DPMS_CTRL_PENDING, 0)) {
	NV_ERROR(dev, "timeout: SOR_DPMS_CTRL_PENDING(%d) == 0\n", or);
	NV_ERROR(dev, "SOR_DPMS_CTRL(%d) = 0x%08x\n", or,
	nv_rd32(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or)));
	}

	val = nv_rd32(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or));

	if (mode == DRM_MODE_DPMS_ON)
	val \|= NV50_PDISPLAY_SOR_DPMS_CTRL_ON;
	else
	val &= ~NV50_PDISPLAY_SOR_DPMS_CTRL_ON;

	nv_wr32(dev, NV50_PDISPLAY_SOR_DPMS_CTRL(or), val \|
	NV50_PDISPLAY_SOR_DPMS_CTRL_PENDING);
	if (!nv_wait(dev, NV50_PDISPLAY_SOR_DPMS_STATE(or),
	NV50_PDISPLAY_SOR_DPMS_STATE_WAIT, 0)) {
	NV_ERROR(dev, "timeout: SOR_DPMS_STATE_WAIT(%d) == 0\n", or);
	NV_ERROR(dev, "SOR_DPMS_STATE(%d) = 0x%08x\n", or,
	nv_rd32(dev, NV50_PDISPLAY_SOR_DPMS_STATE(or)));
	}

	if (nv_encoder->dcb->type == OUTPUT_DP) {
	struct dp_train_func func = {
	.link_set = nv50_sor_dp_link_set,
	.train_set = nv50_sor_dp_train_set,
	.train_adj = nv50_sor_dp_train_adj
	};

	nouveau_dp_dpms(encoder, mode, nv_encoder->dp.datarate, &func);
	}
	}

	static void
	nv50_sor_save(struct drm_encoder *encoder)
	{
	NV_ERROR(encoder->dev, "!!\n");
	}

	static void
	nv50_sor_restore(struct drm_encoder *encoder)
	{
	NV_ERROR(encoder->dev, "!!\n");
	}

	static bool
	nv50_sor_mode_fixup(struct drm_encoder encoder, struct drm_display_mode mode,
	struct drm_display_mode *adjusted_mode)
	{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct nouveau_connector *connector;

	NV_DEBUG_KMS(encoder->dev, "or %d\n", nv_encoder->or);

	connector = nouveau_encoder_connector_get(nv_encoder);
	if (!connector) {
	NV_ERROR(encoder->dev, "Encoder has no connector\n");
	return false;
	}

	if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
	connector->native_mode)
	drm_mode_copy(adjusted_mode, connector->native_mode);

	return true;
	}

	static void
	nv50_sor_prepare(struct drm_encoder *encoder)
	{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	nv50_sor_disconnect(encoder);
	if (nv_encoder->dcb->type == OUTPUT_DP) {
	/* avoid race between link training and supervisor intr */
	nv50_display_sync(encoder->dev);
	}
	}

	static void
	nv50_sor_commit(struct drm_encoder *encoder)
	{
	}

	static void
	nv50_sor_mode_set(struct drm_encoder encoder, struct drm_display_mode umode,
	struct drm_display_mode *mode)
	{
	struct nouveau_channel *evo = nv50_display(encoder->dev)->master;
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct drm_device *dev = encoder->dev;
	struct nouveau_crtc *crtc = nouveau_crtc(encoder->crtc);
	struct nouveau_connector *nv_connector;
	uint32_t mode_ctl = 0;
	int ret;

	NV_DEBUG_KMS(dev, "or %d type %d -> crtc %d\n",
	nv_encoder->or, nv_encoder->dcb->type, crtc->index);
	nv_encoder->crtc = encoder->crtc;

	switch (nv_encoder->dcb->type) {
	case OUTPUT_TMDS:
	if (nv_encoder->dcb->sorconf.link & 1) {
	if (mode->clock < 165000)
	mode_ctl = 0x0100;
	else
	mode_ctl = 0x0500;
	} else
	mode_ctl = 0x0200;

	nouveau_hdmi_mode_set(encoder, mode);
	break;
	case OUTPUT_DP:
	nv_connector = nouveau_encoder_connector_get(nv_encoder);
	if (nv_connector && nv_connector->base.display_info.bpc == 6) {
	nv_encoder->dp.datarate = mode->clock * 18 / 8;
	mode_ctl \|= 0x00020000;
	} else {
	nv_encoder->dp.datarate = mode->clock * 24 / 8;
	mode_ctl \|= 0x00050000;
	}

	if (nv_encoder->dcb->sorconf.link & 1)
	mode_ctl \|= 0x00000800;
	else
	mode_ctl \|= 0x00000900;
	break;
	default:
	break;
	}

	if (crtc->index == 1)
	mode_ctl \|= NV50_EVO_SOR_MODE_CTRL_CRTC1;
	else
	mode_ctl \|= NV50_EVO_SOR_MODE_CTRL_CRTC0;

	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
	mode_ctl \|= NV50_EVO_SOR_MODE_CTRL_NHSYNC;

	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
	mode_ctl \|= NV50_EVO_SOR_MODE_CTRL_NVSYNC;

	nv50_sor_dpms(encoder, DRM_MODE_DPMS_ON);

	ret = RING_SPACE(evo, 2);
	if (ret) {
	NV_ERROR(dev, "no space while connecting SOR\n");
	nv_encoder->crtc = NULL;
	return;
	}
	BEGIN_RING(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
	OUT_RING(evo, mode_ctl);
	}

	static struct drm_crtc *
	nv50_sor_crtc_get(struct drm_encoder *encoder)
	{
	return nouveau_encoder(encoder)->crtc;
	}

	static const struct drm_encoder_helper_funcs nv50_sor_helper_funcs = {
	.dpms = nv50_sor_dpms,
	.save = nv50_sor_save,
	.restore = nv50_sor_restore,
	.mode_fixup = nv50_sor_mode_fixup,
	.prepare = nv50_sor_prepare,
	.commit = nv50_sor_commit,
	.mode_set = nv50_sor_mode_set,
	.get_crtc = nv50_sor_crtc_get,
	.detect = NULL,
	.disable = nv50_sor_disconnect
	};

	static void
	nv50_sor_destroy(struct drm_encoder *encoder)
	{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);

	if (!encoder)
	return;

	NV_DEBUG_KMS(encoder->dev, "\n");

	drm_encoder_cleanup(encoder);

	kfree(nv_encoder);
	}

	static const struct drm_encoder_funcs nv50_sor_encoder_funcs = {
	.destroy = nv50_sor_destroy,
	};

	int
	nv50_sor_create(struct drm_connector connector, struct dcb_entry entry)
	{
	struct nouveau_encoder *nv_encoder = NULL;
	struct drm_device *dev = connector->dev;
	struct drm_encoder *encoder;
	int type;

	NV_DEBUG_KMS(dev, "\n");

	switch (entry->type) {
	case OUTPUT_TMDS:
	case OUTPUT_DP:
	type = DRM_MODE_ENCODER_TMDS;
	break;
	case OUTPUT_LVDS:
	type = DRM_MODE_ENCODER_LVDS;
	break;
	default:
	return -EINVAL;
	}

	nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
	if (!nv_encoder)
	return -ENOMEM;
	encoder = to_drm_encoder(nv_encoder);

	nv_encoder->dcb = entry;
	nv_encoder->or = ffs(entry->or) - 1;
	nv_encoder->last_dpms = DRM_MODE_DPMS_OFF;

	drm_encoder_init(dev, encoder, &nv50_sor_encoder_funcs, type);
	drm_encoder_helper_add(encoder, &nv50_sor_helper_funcs);

	encoder->possible_crtcs = entry->heads;
	encoder->possible_clones = 0;

	drm_mode_connector_attach_encoder(connector, encoder);
	return 0;
	}