[net-next-2.6.git] / drivers / gpu / drm / nouveau / nv50_dac.c

/*
 * 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_dac_disconnect(struct nouveau_encoder *nv_encoder)
{
	struct drm_device *dev = to_drm_encoder(nv_encoder)->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_channel *evo = dev_priv->evo;
	int ret;

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

	ret = RING_SPACE(evo, 2);
	if (ret) {
		NV_ERROR(dev, "no space while disconnecting DAC\n");
		return;
	}
	BEGIN_RING(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 1);
	OUT_RING(evo, 0);
}

static enum drm_connector_status
nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct drm_device *dev = encoder->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	enum drm_connector_status status = connector_status_disconnected;
	uint32_t dpms_state, load_pattern, load_state;
	int or = nv_encoder->or;

	nv_wr32(dev, NV50_PDISPLAY_DAC_CLK_CTRL1(or), 0x00000001);
	dpms_state = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or));

	nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
		0x00150000 | NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
	if (!nv_wait(NV50_PDISPLAY_DAC_DPMS_CTRL(or),
		     NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
		NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
		NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
			  nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
		return status;
	}

	/* Use bios provided value if possible. */
	if (dev_priv->vbios.dactestval) {
		load_pattern = dev_priv->vbios.dactestval;
		NV_DEBUG_KMS(dev, "Using bios provided load_pattern of %d\n",
			  load_pattern);
	} else {
		load_pattern = 340;
		NV_DEBUG_KMS(dev, "Using default load_pattern of %d\n",
			 load_pattern);
	}

	nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or),
		NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE | load_pattern);
	mdelay(45); /* give it some time to process */
	load_state = nv_rd32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or));

	nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or), 0);
	nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), dpms_state |
		NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);

	if ((load_state & NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT) ==
			  NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT)
		status = connector_status_connected;

	if (status == connector_status_connected)
		NV_DEBUG_KMS(dev, "Load was detected on output with or %d\n", or);
	else
		NV_DEBUG_KMS(dev, "Load was not detected on output with or %d\n", or);

	return status;
}

static void
nv50_dac_dpms(struct drm_encoder *encoder, int mode)
{
	struct drm_device *dev = encoder->dev;
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	uint32_t val;
	int or = nv_encoder->or;

	NV_DEBUG_KMS(dev, "or %d mode %d\n", or, mode);

	/* wait for it to be done */
	if (!nv_wait(NV50_PDISPLAY_DAC_DPMS_CTRL(or),
		     NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
		NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
		NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
			 nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
		return;
	}

	val = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)) & ~0x7F;

	if (mode != DRM_MODE_DPMS_ON)
		val |= NV50_PDISPLAY_DAC_DPMS_CTRL_BLANKED;

	switch (mode) {
	case DRM_MODE_DPMS_STANDBY:
		val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
		break;
	case DRM_MODE_DPMS_SUSPEND:
		val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
		break;
	case DRM_MODE_DPMS_OFF:
		val |= NV50_PDISPLAY_DAC_DPMS_CTRL_OFF;
		val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
		val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
		break;
	default:
		break;
	}

	nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), val |
		NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
}

static void
nv50_dac_save(struct drm_encoder *encoder)
{
	NV_ERROR(encoder->dev, "!!\n");
}

static void
nv50_dac_restore(struct drm_encoder *encoder)
{
	NV_ERROR(encoder->dev, "!!\n");
}

static bool
nv50_dac_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_dac_prepare(struct drm_encoder *encoder)
{
}

static void
nv50_dac_commit(struct drm_encoder *encoder)
{
}

static void
nv50_dac_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
		  struct drm_display_mode *adjusted_mode)
{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct drm_device *dev = encoder->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_channel *evo = dev_priv->evo;
	struct nouveau_crtc *crtc = nouveau_crtc(encoder->crtc);
	uint32_t mode_ctl = 0, mode_ctl2 = 0;
	int ret;

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

	nv50_dac_dpms(encoder, DRM_MODE_DPMS_ON);

	if (crtc->index == 1)
		mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC1;
	else
		mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC0;

	/* Lacking a working tv-out, this is not a 100% sure. */
	if (nv_encoder->dcb->type == OUTPUT_ANALOG)
		mode_ctl |= 0x40;
	else
	if (nv_encoder->dcb->type == OUTPUT_TV)
		mode_ctl |= 0x100;

	if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
		mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NHSYNC;

	if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
		mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NVSYNC;

	ret = RING_SPACE(evo, 3);
	if (ret) {
		NV_ERROR(dev, "no space while connecting DAC\n");
		return;
	}
	BEGIN_RING(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 2);
	OUT_RING(evo, mode_ctl);
	OUT_RING(evo, mode_ctl2);
}

static const struct drm_encoder_helper_funcs nv50_dac_helper_funcs = {
	.dpms = nv50_dac_dpms,
	.save = nv50_dac_save,
	.restore = nv50_dac_restore,
	.mode_fixup = nv50_dac_mode_fixup,
	.prepare = nv50_dac_prepare,
	.commit = nv50_dac_commit,
	.mode_set = nv50_dac_mode_set,
	.detect = nv50_dac_detect
};

static void
nv50_dac_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_dac_encoder_funcs = {
	.destroy = nv50_dac_destroy,
};

int
nv50_dac_create(struct drm_device *dev, struct dcb_entry *entry)
{
	struct nouveau_encoder *nv_encoder;
	struct drm_encoder *encoder;

	NV_DEBUG_KMS(dev, "\n");
	NV_INFO(dev, "Detected a DAC output\n");

	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->disconnect = nv50_dac_disconnect;

	drm_encoder_init(dev, encoder, &nv50_dac_encoder_funcs,
			 DRM_MODE_ENCODER_DAC);
	drm_encoder_helper_add(encoder, &nv50_dac_helper_funcs);

	encoder->possible_crtcs = entry->heads;
	encoder->possible_clones = 0;
	return 0;
}
Commit	Line	Data
6ee73861 BS	1	/*
	2	* Copyright (C) 2008 Maarten Maathuis.
	3	* All Rights Reserved.
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining
	6	* a copy of this software and associated documentation files (the
	7	* "Software"), to deal in the Software without restriction, including
	8	* without limitation the rights to use, copy, modify, merge, publish,
	9	* distribute, sublicense, and/or sell copies of the Software, and to
	10	* permit persons to whom the Software is furnished to do so, subject to
	11	* the following conditions:
	12	*
	13	* The above copyright notice and this permission notice (including the
	14	* next paragraph) shall be included in all copies or substantial
	15	* portions of the Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	18	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	19	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	20	* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
	21	* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
	22	* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	23	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	24	*
	25	*/
	26
	27	#include "drmP.h"
	28	#include "drm_crtc_helper.h"
	29
	30	#define NOUVEAU_DMA_DEBUG (nouveau_reg_debug & NOUVEAU_REG_DEBUG_EVO)
	31	#include "nouveau_reg.h"
	32	#include "nouveau_drv.h"
	33	#include "nouveau_dma.h"
	34	#include "nouveau_encoder.h"
	35	#include "nouveau_connector.h"
	36	#include "nouveau_crtc.h"
	37	#include "nv50_display.h"
	38
	39	static void
	40	nv50_dac_disconnect(struct nouveau_encoder *nv_encoder)
	41	{
	42	struct drm_device *dev = to_drm_encoder(nv_encoder)->dev;
	43	struct drm_nouveau_private *dev_priv = dev->dev_private;
	44	struct nouveau_channel *evo = dev_priv->evo;
	45	int ret;
	46
ef2bb506	47	NV_DEBUG_KMS(dev, "Disconnecting DAC %d\n", nv_encoder->or);
6ee73861 BS	48
	49	ret = RING_SPACE(evo, 2);
	50	if (ret) {
	51	NV_ERROR(dev, "no space while disconnecting DAC\n");
	52	return;
	53	}
	54	BEGIN_RING(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 1);
	55	OUT_RING(evo, 0);
	56	}
	57
	58	static enum drm_connector_status
	59	nv50_dac_detect(struct drm_encoder encoder, struct drm_connector connector)
	60	{
	61	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	62	struct drm_device *dev = encoder->dev;
	63	struct drm_nouveau_private *dev_priv = dev->dev_private;
	64	enum drm_connector_status status = connector_status_disconnected;
	65	uint32_t dpms_state, load_pattern, load_state;
	66	int or = nv_encoder->or;
	67
	68	nv_wr32(dev, NV50_PDISPLAY_DAC_CLK_CTRL1(or), 0x00000001);
	69	dpms_state = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or));
	70
	71	nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
	72	0x00150000 \| NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
	73	if (!nv_wait(NV50_PDISPLAY_DAC_DPMS_CTRL(or),
	74	NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
	75	NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
	76	NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
	77	nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
	78	return status;
	79	}
	80
	81	/* Use bios provided value if possible. */
04a39c57 BS	82	if (dev_priv->vbios.dactestval) {
04a39c57 BS	83	load_pattern = dev_priv->vbios.dactestval;
ef2bb506	84	NV_DEBUG_KMS(dev, "Using bios provided load_pattern of %d\n",
6ee73861 BS	85	load_pattern);
	86	} else {
	87	load_pattern = 340;
ef2bb506	88	NV_DEBUG_KMS(dev, "Using default load_pattern of %d\n",
6ee73861 BS	89	load_pattern);
	90	}
	91
	92	nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or),
	93	NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE \| load_pattern);
	94	mdelay(45); /* give it some time to process */
	95	load_state = nv_rd32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or));
	96
	97	nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or), 0);
	98	nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), dpms_state \|
	99	NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
	100
	101	if ((load_state & NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT) ==
	102	NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT)
	103	status = connector_status_connected;
	104
	105	if (status == connector_status_connected)
ef2bb506	106	NV_DEBUG_KMS(dev, "Load was detected on output with or %d\n", or);
6ee73861	107	else
ef2bb506	108	NV_DEBUG_KMS(dev, "Load was not detected on output with or %d\n", or);
6ee73861 BS	109
	110	return status;
	111	}
	112
	113	static void
	114	nv50_dac_dpms(struct drm_encoder *encoder, int mode)
	115	{
	116	struct drm_device *dev = encoder->dev;
	117	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	118	uint32_t val;
	119	int or = nv_encoder->or;
	120
ef2bb506	121	NV_DEBUG_KMS(dev, "or %d mode %d\n", or, mode);
6ee73861 BS	122
	123	/* wait for it to be done */
	124	if (!nv_wait(NV50_PDISPLAY_DAC_DPMS_CTRL(or),
	125	NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
	126	NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
	127	NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
	128	nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
	129	return;
	130	}
	131
	132	val = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)) & ~0x7F;
	133
	134	if (mode != DRM_MODE_DPMS_ON)
	135	val \|= NV50_PDISPLAY_DAC_DPMS_CTRL_BLANKED;
	136
	137	switch (mode) {
	138	case DRM_MODE_DPMS_STANDBY:
	139	val \|= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
	140	break;
	141	case DRM_MODE_DPMS_SUSPEND:
	142	val \|= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
	143	break;
	144	case DRM_MODE_DPMS_OFF:
	145	val \|= NV50_PDISPLAY_DAC_DPMS_CTRL_OFF;
	146	val \|= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
	147	val \|= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
	148	break;
	149	default:
	150	break;
	151	}
	152
	153	nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), val \|
	154	NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
	155	}
	156
	157	static void
	158	nv50_dac_save(struct drm_encoder *encoder)
	159	{
	160	NV_ERROR(encoder->dev, "!!\n");
	161	}
	162
	163	static void
	164	nv50_dac_restore(struct drm_encoder *encoder)
	165	{
	166	NV_ERROR(encoder->dev, "!!\n");
	167	}
	168
	169	static bool
	170	nv50_dac_mode_fixup(struct drm_encoder encoder, struct drm_display_mode mode,
	171	struct drm_display_mode *adjusted_mode)
	172	{
	173	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	174	struct nouveau_connector *connector;
	175
ef2bb506	176	NV_DEBUG_KMS(encoder->dev, "or %d\n", nv_encoder->or);
6ee73861 BS	177
	178	connector = nouveau_encoder_connector_get(nv_encoder);
	179	if (!connector) {
	180	NV_ERROR(encoder->dev, "Encoder has no connector\n");
	181	return false;
	182	}
	183
	184	if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
	185	connector->native_mode) {
	186	int id = adjusted_mode->base.id;
	187	adjusted_mode = connector->native_mode;
	188	adjusted_mode->base.id = id;
	189	}
	190
	191	return true;
	192	}
	193
	194	static void
	195	nv50_dac_prepare(struct drm_encoder *encoder)
	196	{
	197	}
	198
	199	static void
	200	nv50_dac_commit(struct drm_encoder *encoder)
	201	{
	202	}
	203
	204	static void
	205	nv50_dac_mode_set(struct drm_encoder encoder, struct drm_display_mode mode,
	206	struct drm_display_mode *adjusted_mode)
	207	{
	208	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	209	struct drm_device *dev = encoder->dev;
	210	struct drm_nouveau_private *dev_priv = dev->dev_private;
	211	struct nouveau_channel *evo = dev_priv->evo;
	212	struct nouveau_crtc *crtc = nouveau_crtc(encoder->crtc);
	213	uint32_t mode_ctl = 0, mode_ctl2 = 0;
	214	int ret;
	215
ef2bb506	216	NV_DEBUG_KMS(dev, "or %d\n", nv_encoder->or);
6ee73861 BS	217
	218	nv50_dac_dpms(encoder, DRM_MODE_DPMS_ON);
	219
	220	if (crtc->index == 1)
	221	mode_ctl \|= NV50_EVO_DAC_MODE_CTRL_CRTC1;
	222	else
	223	mode_ctl \|= NV50_EVO_DAC_MODE_CTRL_CRTC0;
	224
	225	/* Lacking a working tv-out, this is not a 100% sure. */
	226	if (nv_encoder->dcb->type == OUTPUT_ANALOG)
	227	mode_ctl \|= 0x40;
	228	else
	229	if (nv_encoder->dcb->type == OUTPUT_TV)
	230	mode_ctl \|= 0x100;
	231
	232	if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
	233	mode_ctl2 \|= NV50_EVO_DAC_MODE_CTRL2_NHSYNC;
	234
	235	if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
	236	mode_ctl2 \|= NV50_EVO_DAC_MODE_CTRL2_NVSYNC;
	237
	238	ret = RING_SPACE(evo, 3);
	239	if (ret) {
	240	NV_ERROR(dev, "no space while connecting DAC\n");
	241	return;
	242	}
	243	BEGIN_RING(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 2);
	244	OUT_RING(evo, mode_ctl);
	245	OUT_RING(evo, mode_ctl2);
	246	}
	247
	248	static const struct drm_encoder_helper_funcs nv50_dac_helper_funcs = {
	249	.dpms = nv50_dac_dpms,
	250	.save = nv50_dac_save,
	251	.restore = nv50_dac_restore,
	252	.mode_fixup = nv50_dac_mode_fixup,
	253	.prepare = nv50_dac_prepare,
	254	.commit = nv50_dac_commit,
	255	.mode_set = nv50_dac_mode_set,
	256	.detect = nv50_dac_detect
	257	};
	258
	259	static void
	260	nv50_dac_destroy(struct drm_encoder *encoder)
	261	{
	262	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	263
	264	if (!encoder)
	265	return;
	266
ef2bb506	267	NV_DEBUG_KMS(encoder->dev, "\n");
6ee73861 BS	268
	269	drm_encoder_cleanup(encoder);
	270	kfree(nv_encoder);
	271	}
	272
	273	static const struct drm_encoder_funcs nv50_dac_encoder_funcs = {
	274	.destroy = nv50_dac_destroy,
	275	};
	276
	277	int
	278	nv50_dac_create(struct drm_device dev, struct dcb_entry entry)
	279	{
	280	struct nouveau_encoder *nv_encoder;
	281	struct drm_encoder *encoder;
	282
ef2bb506	283	NV_DEBUG_KMS(dev, "\n");
6ee73861 BS	284	NV_INFO(dev, "Detected a DAC output\n");
	285
	286	nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
	287	if (!nv_encoder)
	288	return -ENOMEM;
	289	encoder = to_drm_encoder(nv_encoder);
	290
	291	nv_encoder->dcb = entry;
	292	nv_encoder->or = ffs(entry->or) - 1;
	293
	294	nv_encoder->disconnect = nv50_dac_disconnect;
	295
	296	drm_encoder_init(dev, encoder, &nv50_dac_encoder_funcs,
	297	DRM_MODE_ENCODER_DAC);
	298	drm_encoder_helper_add(encoder, &nv50_dac_helper_funcs);
	299
	300	encoder->possible_crtcs = entry->heads;
	301	encoder->possible_clones = 0;
	302	return 0;
	303	}
	304