drivers/gpu/drm/nouveau/nv50_sor.c - maze/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 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);

 	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 nouveau_i2c_chan *auxch;

 		auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
 		if (!auxch)
 			return;

 		if (mode == DRM_MODE_DPMS_ON) {
 			u8 status = DP_SET_POWER_D0;
 			nouveau_dp_auxch(auxch, 8, DP_SET_POWER, &status, 1);
 			nouveau_dp_link_train(encoder, nv_encoder->dp.datarate);
 		} else {
 			u8 status = DP_SET_POWER_D3;
 			nouveau_dp_auxch(auxch, 8, DP_SET_POWER, &status, 1);
 		}
 	}
 }

 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) {
 		int id = adjusted_mode->base.id;
 		*adjusted_mode = *connector->native_mode;
 		adjusted_mode->base.id = id;
 	}

 	return true;
 }

 static void
 nv50_sor_prepare(struct drm_encoder *encoder)
 {
 }

 static void
 nv50_sor_commit(struct drm_encoder *encoder)
 {
 }

 static void
 nv50_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 		  struct drm_display_mode *adjusted_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);

 	switch (nv_encoder->dcb->type) {
 	case OUTPUT_TMDS:
 		if (nv_encoder->dcb->sorconf.link & 1) {
 			if (adjusted_mode->clock < 165000)
 				mode_ctl = 0x0100;
 			else
 				mode_ctl = 0x0500;
 		} else
 			mode_ctl = 0x0200;
 		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 = crtc->mode->clock * 18 / 8;
 			mode_ctl |= 0x00020000;
 		} else {
 			nv_encoder->dp.datarate = crtc->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 (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
 		mode_ctl |= NV50_EVO_SOR_MODE_CTRL_NHSYNC;

 	if (adjusted_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");
 		return;
 	}
 	BEGIN_RING(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
 	OUT_RING(evo, mode_ctl);

 	nv_encoder->crtc = encoder->crtc;
 }

 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 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);

	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 nouveau_i2c_chan *auxch;

	auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
	if (!auxch)
	return;

	if (mode == DRM_MODE_DPMS_ON) {
	u8 status = DP_SET_POWER_D0;
	nouveau_dp_auxch(auxch, 8, DP_SET_POWER, &status, 1);
	nouveau_dp_link_train(encoder, nv_encoder->dp.datarate);
	} else {
	u8 status = DP_SET_POWER_D3;
	nouveau_dp_auxch(auxch, 8, DP_SET_POWER, &status, 1);
	}
	}
	}

	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) {
	int id = adjusted_mode->base.id;
	adjusted_mode = connector->native_mode;
	adjusted_mode->base.id = id;
	}

	return true;
	}

	static void
	nv50_sor_prepare(struct drm_encoder *encoder)
	{
	}

	static void
	nv50_sor_commit(struct drm_encoder *encoder)
	{
	}

	static void
	nv50_sor_mode_set(struct drm_encoder encoder, struct drm_display_mode mode,
	struct drm_display_mode *adjusted_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);

	switch (nv_encoder->dcb->type) {
	case OUTPUT_TMDS:
	if (nv_encoder->dcb->sorconf.link & 1) {
	if (adjusted_mode->clock < 165000)
	mode_ctl = 0x0100;
	else
	mode_ctl = 0x0500;
	} else
	mode_ctl = 0x0200;
	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 = crtc->mode->clock * 18 / 8;
	mode_ctl \|= 0x00020000;
	} else {
	nv_encoder->dp.datarate = crtc->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 (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
	mode_ctl \|= NV50_EVO_SOR_MODE_CTRL_NHSYNC;

	if (adjusted_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");
	return;
	}
	BEGIN_RING(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
	OUT_RING(evo, mode_ctl);

	nv_encoder->crtc = encoder->crtc;
	}

	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;
	}