[linux-2.6-block.git] / drivers / gpu / drm / nouveau / nouveau_dp.c

/*
 * Copyright 2009 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: Ben Skeggs
 */

#include <drm/display/drm_dp_helper.h>

#include "nouveau_drv.h"
#include "nouveau_connector.h"
#include "nouveau_encoder.h"
#include "nouveau_crtc.h"

#include <nvif/event.h>

MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
static int nouveau_mst = 1;
module_param_named(mst, nouveau_mst, int, 0400);

static bool
nouveau_dp_has_sink_count(struct drm_connector *connector,
			  struct nouveau_encoder *outp)
{
	return drm_dp_read_sink_count_cap(connector, outp->dp.dpcd, &outp->dp.desc);
}

static enum drm_connector_status
nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector,
		      struct nouveau_encoder *outp)
{
	struct drm_connector *connector = &nv_connector->base;
	struct drm_dp_aux *aux = &nv_connector->aux;
	struct nv50_mstm *mstm = NULL;
	enum drm_connector_status status = connector_status_disconnected;
	int ret;
	u8 *dpcd = outp->dp.dpcd;

	ret = drm_dp_read_dpcd_caps(aux, dpcd);
	if (ret < 0)
		goto out;

	ret = drm_dp_read_desc(aux, &outp->dp.desc, drm_dp_is_branch(dpcd));
	if (ret < 0)
		goto out;

	if (nouveau_mst) {
		mstm = outp->dp.mstm;
		if (mstm)
			mstm->can_mst = drm_dp_read_mst_cap(aux, dpcd);
	}

	if (nouveau_dp_has_sink_count(connector, outp)) {
		ret = drm_dp_read_sink_count(aux);
		if (ret < 0)
			goto out;

		outp->dp.sink_count = ret;

		/*
		 * Dongle connected, but no display. Don't bother reading
		 * downstream port info
		 */
		if (!outp->dp.sink_count)
			return connector_status_disconnected;
	}

	ret = drm_dp_read_downstream_info(aux, dpcd,
					  outp->dp.downstream_ports);
	if (ret < 0)
		goto out;

	status = connector_status_connected;
out:
	if (status != connector_status_connected) {
		/* Clear any cached info */
		outp->dp.sink_count = 0;
	}
	return status;
}

int
nouveau_dp_detect(struct nouveau_connector *nv_connector,
		  struct nouveau_encoder *nv_encoder)
{
	struct drm_device *dev = nv_encoder->base.base.dev;
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct drm_connector *connector = &nv_connector->base;
	struct nv50_mstm *mstm = nv_encoder->dp.mstm;
	enum drm_connector_status status;
	u8 *dpcd = nv_encoder->dp.dpcd;
	int ret = NOUVEAU_DP_NONE, hpd;

	/* If we've already read the DPCD on an eDP device, we don't need to
	 * reread it as it won't change
	 */
	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP &&
	    dpcd[DP_DPCD_REV] != 0)
		return NOUVEAU_DP_SST;

	mutex_lock(&nv_encoder->dp.hpd_irq_lock);
	if (mstm) {
		/* If we're not ready to handle MST state changes yet, just
		 * report the last status of the connector. We'll reprobe it
		 * once we've resumed.
		 */
		if (mstm->suspended) {
			if (mstm->is_mst)
				ret = NOUVEAU_DP_MST;
			else if (connector->status ==
				 connector_status_connected)
				ret = NOUVEAU_DP_SST;

			goto out;
		}
	}

	/* Check status of HPD pin before attempting an AUX transaction that
	 * would result in a number of (futile) retries on a connector which
	 * has no display plugged.
	 *
	 * TODO: look into checking this before probing I2C to detect DVI/HDMI
	 */
	hpd = nvif_conn_hpd_status(&nv_connector->conn);
	if (hpd == NVIF_CONN_HPD_STATUS_NOT_PRESENT) {
		nvif_outp_dp_aux_pwr(&nv_encoder->outp, false);
		goto out;
	}
	nvif_outp_dp_aux_pwr(&nv_encoder->outp, true);

	status = nouveau_dp_probe_dpcd(nv_connector, nv_encoder);
	if (status == connector_status_disconnected) {
		nvif_outp_dp_aux_pwr(&nv_encoder->outp, false);
		goto out;
	}

	/* If we're in MST mode, we're done here */
	if (mstm && mstm->can_mst && mstm->is_mst) {
		ret = NOUVEAU_DP_MST;
		goto out;
	}

	nv_encoder->dp.link_bw = 27000 * dpcd[DP_MAX_LINK_RATE];
	nv_encoder->dp.link_nr =
		dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;

	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP && dpcd[DP_DPCD_REV] >= 0x13) {
		struct drm_dp_aux *aux = &nv_connector->aux;
		int ret, i;
		u8 sink_rates[16];

		ret = drm_dp_dpcd_read(aux, DP_SUPPORTED_LINK_RATES, sink_rates, sizeof(sink_rates));
		if (ret == sizeof(sink_rates)) {
			for (i = 0; i < ARRAY_SIZE(sink_rates); i += 2) {
				int val = ((sink_rates[i + 1] << 8) | sink_rates[i]) * 200 / 10;
				if (val && (i == 0 || val > nv_encoder->dp.link_bw))
					nv_encoder->dp.link_bw = val;
			}
		}
	}

	NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
		 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw,
		 dpcd[DP_DPCD_REV]);
	NV_DEBUG(drm, "encoder: %dx%d\n",
		 nv_encoder->dcb->dpconf.link_nr,
		 nv_encoder->dcb->dpconf.link_bw);

	if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
		nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
	if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
		nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;

	NV_DEBUG(drm, "maximum: %dx%d\n",
		 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);

	if (mstm && mstm->can_mst) {
		ret = nv50_mstm_detect(nv_encoder);
		if (ret == 1) {
			ret = NOUVEAU_DP_MST;
			goto out;
		} else if (ret != 0) {
			nvif_outp_dp_aux_pwr(&nv_encoder->outp, false);
			goto out;
		}
	}
	ret = NOUVEAU_DP_SST;

out:
	if (mstm && !mstm->suspended && ret != NOUVEAU_DP_MST)
		nv50_mstm_remove(mstm);

	mutex_unlock(&nv_encoder->dp.hpd_irq_lock);
	return ret;
}

void nouveau_dp_irq(struct nouveau_drm *drm,
		    struct nouveau_connector *nv_connector)
{
	struct drm_connector *connector = &nv_connector->base;
	struct nouveau_encoder *outp = find_encoder(connector, DCB_OUTPUT_DP);
	struct nv50_mstm *mstm;
	u64 hpd = 0;
	int ret;

	if (!outp)
		return;

	mstm = outp->dp.mstm;
	NV_DEBUG(drm, "service %s\n", connector->name);

	mutex_lock(&outp->dp.hpd_irq_lock);

	if (mstm && mstm->is_mst) {
		if (!nv50_mstm_service(drm, nv_connector, mstm))
			hpd |= NVIF_NOTIFY_CONN_V0_UNPLUG;
	} else {
		drm_dp_cec_irq(&nv_connector->aux);

		if (nouveau_dp_has_sink_count(connector, outp)) {
			ret = drm_dp_read_sink_count(&nv_connector->aux);
			if (ret != outp->dp.sink_count)
				hpd |= NVIF_NOTIFY_CONN_V0_PLUG;
			if (ret >= 0)
				outp->dp.sink_count = ret;
		}
	}

	mutex_unlock(&outp->dp.hpd_irq_lock);

	nouveau_connector_hpd(nv_connector, NVIF_NOTIFY_CONN_V0_IRQ | hpd);
}

/* TODO:
 * - Use the minimum possible BPC here, once we add support for the max bpc
 *   property.
 * - Validate against the DP caps advertised by the GPU (we don't check these
 *   yet)
 */
enum drm_mode_status
nv50_dp_mode_valid(struct drm_connector *connector,
		   struct nouveau_encoder *outp,
		   const struct drm_display_mode *mode,
		   unsigned *out_clock)
{
	const unsigned int min_clock = 25000;
	unsigned int max_rate, mode_rate, ds_max_dotclock, clock = mode->clock;
	const u8 bpp = connector->display_info.bpc * 3;

	if (mode->flags & DRM_MODE_FLAG_INTERLACE && !outp->caps.dp_interlace)
		return MODE_NO_INTERLACE;

	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
		clock *= 2;

	max_rate = outp->dp.link_nr * outp->dp.link_bw;
	mode_rate = DIV_ROUND_UP(clock * bpp, 8);
	if (mode_rate > max_rate)
		return MODE_CLOCK_HIGH;

	ds_max_dotclock = drm_dp_downstream_max_dotclock(outp->dp.dpcd, outp->dp.downstream_ports);
	if (ds_max_dotclock && clock > ds_max_dotclock)
		return MODE_CLOCK_HIGH;

	if (clock < min_clock)
		return MODE_CLOCK_LOW;

	if (out_clock)
		*out_clock = clock;

	return MODE_OK;
}
Commit	Line	Data
6ee73861 BS	1	/*
	2	* Copyright 2009 Red Hat Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	* Authors: Ben Skeggs
	23	*/
	24
da68386d	25	#include <drm/display/drm_dp_helper.h>
b01f0608	26
4dc28134	27	#include "nouveau_drv.h"
b01f0608	28	#include "nouveau_connector.h"
6ee73861	29	#include "nouveau_encoder.h"
27a45987	30	#include "nouveau_crtc.h"
6ee73861	31
016dacb6	32	#include <nvif/event.h>
52aa30f2	33
f479c0ba BS	34	MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
	35	static int nouveau_mst = 1;
	36	module_param_named(mst, nouveau_mst, int, 0400);
	37
a4efad35 LP	38	static bool
	39	nouveau_dp_has_sink_count(struct drm_connector *connector,
	40	struct nouveau_encoder *outp)
	41	{
	42	return drm_dp_read_sink_count_cap(connector, outp->dp.dpcd, &outp->dp.desc);
	43	}
	44
a0922278 LP	45	static enum drm_connector_status
	46	nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector,
	47	struct nouveau_encoder *outp)
	48	{
a4efad35	49	struct drm_connector *connector = &nv_connector->base;
a0922278 LP	50	struct drm_dp_aux *aux = &nv_connector->aux;
a0922278 LP	51	struct nv50_mstm *mstm = NULL;
a4efad35	52	enum drm_connector_status status = connector_status_disconnected;
a0922278 LP	53	int ret;
a0922278 LP	54	u8 *dpcd = outp->dp.dpcd;
a0922278	55
79416e97 LP	56	ret = drm_dp_read_dpcd_caps(aux, dpcd);
	57	if (ret < 0)
	58	goto out;
	59
	60	ret = drm_dp_read_desc(aux, &outp->dp.desc, drm_dp_is_branch(dpcd));
	61	if (ret < 0)
a4efad35	62	goto out;
a0922278	63
8b75e83e	64	if (nouveau_mst) {
a0922278	65	mstm = outp->dp.mstm;
8b75e83e LP	66	if (mstm)
8b75e83e LP	67	mstm->can_mst = drm_dp_read_mst_cap(aux, dpcd);
a0922278 LP	68	}
a0922278 LP	69
a4efad35 LP	70	if (nouveau_dp_has_sink_count(connector, outp)) {
	71	ret = drm_dp_read_sink_count(aux);
	72	if (ret < 0)
	73	goto out;
	74
	75	outp->dp.sink_count = ret;
	76
	77	/*
	78	* Dongle connected, but no display. Don't bother reading
	79	* downstream port info
	80	*/
	81	if (!outp->dp.sink_count)
	82	return connector_status_disconnected;
	83	}
	84
409d3813 LP	85	ret = drm_dp_read_downstream_info(aux, dpcd,
	86	outp->dp.downstream_ports);
	87	if (ret < 0)
a4efad35	88	goto out;
409d3813	89
a4efad35 LP	90	status = connector_status_connected;
	91	out:
	92	if (status != connector_status_connected) {
	93	/* Clear any cached info */
	94	outp->dp.sink_count = 0;
	95	}
	96	return status;
a0922278 LP	97	}
a0922278 LP	98
8777c5c1	99	int
6ba11932 LP	100	nouveau_dp_detect(struct nouveau_connector *nv_connector,
6ba11932 LP	101	struct nouveau_encoder *nv_encoder)
6ee73861	102	{
8777c5c1	103	struct drm_device *dev = nv_encoder->base.base.dev;
77145f1c	104	struct nouveau_drm *drm = nouveau_drm(dev);
a0922278 LP	105	struct drm_connector *connector = &nv_connector->base;
	106	struct nv50_mstm *mstm = nv_encoder->dp.mstm;
	107	enum drm_connector_status status;
	108	u8 *dpcd = nv_encoder->dp.dpcd;
32dd9236	109	int ret = NOUVEAU_DP_NONE, hpd;
a0922278 LP	110
	111	/* If we've already read the DPCD on an eDP device, we don't need to
	112	* reread it as it won't change
	113	*/
	114	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP &&
	115	dpcd[DP_DPCD_REV] != 0)
	116	return NOUVEAU_DP_SST;
6ee73861	117
a0922278 LP	118	mutex_lock(&nv_encoder->dp.hpd_irq_lock);
	119	if (mstm) {
	120	/* If we're not ready to handle MST state changes yet, just
	121	* report the last status of the connector. We'll reprobe it
	122	* once we've resumed.
	123	*/
	124	if (mstm->suspended) {
	125	if (mstm->is_mst)
	126	ret = NOUVEAU_DP_MST;
	127	else if (connector->status ==
	128	connector_status_connected)
	129	ret = NOUVEAU_DP_SST;
	130
	131	goto out;
	132	}
	133	}
	134
32dd9236 BS	135	/* Check status of HPD pin before attempting an AUX transaction that
	136	* would result in a number of (futile) retries on a connector which
	137	* has no display plugged.
	138	*
	139	* TODO: look into checking this before probing I2C to detect DVI/HDMI
	140	*/
	141	hpd = nvif_conn_hpd_status(&nv_connector->conn);
a62b7493 BS	142	if (hpd == NVIF_CONN_HPD_STATUS_NOT_PRESENT) {
a62b7493 BS	143	nvif_outp_dp_aux_pwr(&nv_encoder->outp, false);
32dd9236	144	goto out;
a62b7493 BS	145	}
a62b7493 BS	146	nvif_outp_dp_aux_pwr(&nv_encoder->outp, true);
32dd9236	147
a0922278	148	status = nouveau_dp_probe_dpcd(nv_connector, nv_encoder);
a62b7493 BS	149	if (status == connector_status_disconnected) {
a62b7493 BS	150	nvif_outp_dp_aux_pwr(&nv_encoder->outp, false);
a0922278	151	goto out;
a62b7493	152	}
a0922278 LP	153
	154	/* If we're in MST mode, we're done here */
	155	if (mstm && mstm->can_mst && mstm->is_mst) {
	156	ret = NOUVEAU_DP_MST;
	157	goto out;
	158	}
6ee73861	159
57940402 LP	160	nv_encoder->dp.link_bw = 27000 * dpcd[DP_MAX_LINK_RATE];
	161	nv_encoder->dp.link_nr =
	162	dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
6ee73861	163
70704fbf BS	164	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP && dpcd[DP_DPCD_REV] >= 0x13) {
	165	struct drm_dp_aux *aux = &nv_connector->aux;
	166	int ret, i;
	167	u8 sink_rates[16];
	168
	169	ret = drm_dp_dpcd_read(aux, DP_SUPPORTED_LINK_RATES, sink_rates, sizeof(sink_rates));
	170	if (ret == sizeof(sink_rates)) {
	171	for (i = 0; i < ARRAY_SIZE(sink_rates); i += 2) {
	172	int val = ((sink_rates[i + 1] << 8) \| sink_rates[i]) * 200 / 10;
	173	if (val && (i == 0 \|\| val > nv_encoder->dp.link_bw))
	174	nv_encoder->dp.link_bw = val;
	175	}
	176	}
	177	}
	178
77145f1c	179	NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
57940402 LP	180	nv_encoder->dp.link_nr, nv_encoder->dp.link_bw,
57940402 LP	181	dpcd[DP_DPCD_REV]);
77145f1c	182	NV_DEBUG(drm, "encoder: %dx%d\n",
bbcd521e LP	183	nv_encoder->dcb->dpconf.link_nr,
bbcd521e LP	184	nv_encoder->dcb->dpconf.link_bw);
6ee73861	185
75a1fccf	186	if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
6ee73861	187	nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
75a1fccf BS	188	if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
75a1fccf BS	189	nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
6ee73861	190
77145f1c	191	NV_DEBUG(drm, "maximum: %dx%d\n",
bbcd521e	192	nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
fe224bb7	193
a0922278 LP	194	if (mstm && mstm->can_mst) {
	195	ret = nv50_mstm_detect(nv_encoder);
	196	if (ret == 1) {
	197	ret = NOUVEAU_DP_MST;
	198	goto out;
	199	} else if (ret != 0) {
a62b7493	200	nvif_outp_dp_aux_pwr(&nv_encoder->outp, false);
a0922278 LP	201	goto out;
a0922278 LP	202	}
6ba11932	203	}
a0922278	204	ret = NOUVEAU_DP_SST;
52aa30f2	205
a0922278 LP	206	out:
	207	if (mstm && !mstm->suspended && ret != NOUVEAU_DP_MST)
	208	nv50_mstm_remove(mstm);
	209
	210	mutex_unlock(&nv_encoder->dp.hpd_irq_lock);
52aa30f2	211	return ret;
6ee73861	212	}
d6a9efec	213
a0922278 LP	214	void nouveau_dp_irq(struct nouveau_drm *drm,
	215	struct nouveau_connector *nv_connector)
	216	{
	217	struct drm_connector *connector = &nv_connector->base;
	218	struct nouveau_encoder *outp = find_encoder(connector, DCB_OUTPUT_DP);
	219	struct nv50_mstm *mstm;
016dacb6	220	u64 hpd = 0;
a4efad35	221	int ret;
a0922278 LP	222
	223	if (!outp)
	224	return;
	225
	226	mstm = outp->dp.mstm;
	227	NV_DEBUG(drm, "service %s\n", connector->name);
	228
	229	mutex_lock(&outp->dp.hpd_irq_lock);
	230
	231	if (mstm && mstm->is_mst) {
	232	if (!nv50_mstm_service(drm, nv_connector, mstm))
016dacb6	233	hpd \|= NVIF_NOTIFY_CONN_V0_UNPLUG;
a0922278 LP	234	} else {
a0922278 LP	235	drm_dp_cec_irq(&nv_connector->aux);
a4efad35 LP	236
	237	if (nouveau_dp_has_sink_count(connector, outp)) {
	238	ret = drm_dp_read_sink_count(&nv_connector->aux);
	239	if (ret != outp->dp.sink_count)
016dacb6	240	hpd \|= NVIF_NOTIFY_CONN_V0_PLUG;
a4efad35 LP	241	if (ret >= 0)
	242	outp->dp.sink_count = ret;
	243	}
a0922278 LP	244	}
	245
	246	mutex_unlock(&outp->dp.hpd_irq_lock);
a4efad35	247
016dacb6	248	nouveau_connector_hpd(nv_connector, NVIF_NOTIFY_CONN_V0_IRQ \| hpd);
a0922278 LP	249	}
a0922278 LP	250
d6a9efec LP	251	/* TODO:
	252	* - Use the minimum possible BPC here, once we add support for the max bpc
	253	* property.
d6a9efec LP	254	* - Validate against the DP caps advertised by the GPU (we don't check these
	255	* yet)
	256	*/
	257	enum drm_mode_status
	258	nv50_dp_mode_valid(struct drm_connector *connector,
	259	struct nouveau_encoder *outp,
	260	const struct drm_display_mode *mode,
	261	unsigned *out_clock)
	262	{
d7787cc0 LP	263	const unsigned int min_clock = 25000;
	264	unsigned int max_rate, mode_rate, ds_max_dotclock, clock = mode->clock;
	265	const u8 bpp = connector->display_info.bpc * 3;
d6a9efec LP	266
	267	if (mode->flags & DRM_MODE_FLAG_INTERLACE && !outp->caps.dp_interlace)
	268	return MODE_NO_INTERLACE;
	269
2d831155 LP	270	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
	271	clock *= 2;
	272
d7787cc0 LP	273	max_rate = outp->dp.link_nr * outp->dp.link_bw;
	274	mode_rate = DIV_ROUND_UP(clock * bpp, 8);
	275	if (mode_rate > max_rate)
	276	return MODE_CLOCK_HIGH;
	277
	278	ds_max_dotclock = drm_dp_downstream_max_dotclock(outp->dp.dpcd, outp->dp.downstream_ports);
	279	if (ds_max_dotclock && clock > ds_max_dotclock)
	280	return MODE_CLOCK_HIGH;
d6a9efec	281
2d831155 LP	282	if (clock < min_clock)
2d831155 LP	283	return MODE_CLOCK_LOW;
2d831155	284
d6a9efec LP	285	if (out_clock)
d6a9efec LP	286	*out_clock = clock;
2d831155 LP	287
2d831155 LP	288	return MODE_OK;
d6a9efec	289	}