[deliverable/linux.git] / drivers / gpu / drm / msm / mdp4 / mdp4_kms.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "msm_drv.h"
#include "mdp4_kms.h"

#include <mach/iommu.h>

static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev);

static int mdp4_hw_init(struct msm_kms *kms)
{
	struct mdp4_kms *mdp4_kms = to_mdp4_kms(kms);
	struct drm_device *dev = mdp4_kms->dev;
	uint32_t version, major, minor, dmap_cfg, vg_cfg;
	unsigned long clk;
	int ret = 0;

	pm_runtime_get_sync(dev->dev);

	version = mdp4_read(mdp4_kms, REG_MDP4_VERSION);

	major = FIELD(version, MDP4_VERSION_MAJOR);
	minor = FIELD(version, MDP4_VERSION_MINOR);

	DBG("found MDP version v%d.%d", major, minor);

	if (major != 4) {
		dev_err(dev->dev, "unexpected MDP version: v%d.%d\n",
				major, minor);
		ret = -ENXIO;
		goto out;
	}

	mdp4_kms->rev = minor;

	if (mdp4_kms->dsi_pll_vdda) {
		if ((mdp4_kms->rev == 2) || (mdp4_kms->rev == 4)) {
			ret = regulator_set_voltage(mdp4_kms->dsi_pll_vdda,
					1200000, 1200000);
			if (ret) {
				dev_err(dev->dev,
					"failed to set dsi_pll_vdda voltage: %d\n", ret);
				goto out;
			}
		}
	}

	if (mdp4_kms->dsi_pll_vddio) {
		if (mdp4_kms->rev == 2) {
			ret = regulator_set_voltage(mdp4_kms->dsi_pll_vddio,
					1800000, 1800000);
			if (ret) {
				dev_err(dev->dev,
					"failed to set dsi_pll_vddio voltage: %d\n", ret);
				goto out;
			}
		}
	}

	if (mdp4_kms->rev > 1) {
		mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff);
		mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f);
	}

	mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3);

	/* max read pending cmd config, 3 pending requests: */
	mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222);

	clk = clk_get_rate(mdp4_kms->clk);

	if ((mdp4_kms->rev >= 1) || (clk >= 90000000)) {
		dmap_cfg = 0x47;     /* 16 bytes-burst x 8 req */
		vg_cfg = 0x47;       /* 16 bytes-burs x 8 req */
	} else {
		dmap_cfg = 0x27;     /* 8 bytes-burst x 8 req */
		vg_cfg = 0x43;       /* 16 bytes-burst x 4 req */
	}

	DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg);

	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg);

	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg);

	if (mdp4_kms->rev >= 2)
		mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1);

	/* disable CSC matrix / YUV by default: */
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0);
	mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0);
	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0);

	if (mdp4_kms->rev > 1)
		mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1);

out:
	pm_runtime_put_sync(dev->dev);

	return ret;
}

static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
		struct drm_encoder *encoder)
{
	/* if we had >1 encoder, we'd need something more clever: */
	return mdp4_dtv_round_pixclk(encoder, rate);
}

static void mdp4_preclose(struct msm_kms *kms, struct drm_file *file)
{
	struct mdp4_kms *mdp4_kms = to_mdp4_kms(kms);
	struct msm_drm_private *priv = mdp4_kms->dev->dev_private;
	unsigned i;

	for (i = 0; i < priv->num_crtcs; i++)
		mdp4_crtc_cancel_pending_flip(priv->crtcs[i]);
}

static void mdp4_destroy(struct msm_kms *kms)
{
	struct mdp4_kms *mdp4_kms = to_mdp4_kms(kms);
	kfree(mdp4_kms);
}

static const struct msm_kms_funcs kms_funcs = {
		.hw_init         = mdp4_hw_init,
		.irq_preinstall  = mdp4_irq_preinstall,
		.irq_postinstall = mdp4_irq_postinstall,
		.irq_uninstall   = mdp4_irq_uninstall,
		.irq             = mdp4_irq,
		.enable_vblank   = mdp4_enable_vblank,
		.disable_vblank  = mdp4_disable_vblank,
		.get_format      = mdp4_get_format,
		.round_pixclk    = mdp4_round_pixclk,
		.preclose        = mdp4_preclose,
		.destroy         = mdp4_destroy,
};

int mdp4_disable(struct mdp4_kms *mdp4_kms)
{
	DBG("");

	clk_disable_unprepare(mdp4_kms->clk);
	if (mdp4_kms->pclk)
		clk_disable_unprepare(mdp4_kms->pclk);
	clk_disable_unprepare(mdp4_kms->lut_clk);

	return 0;
}

int mdp4_enable(struct mdp4_kms *mdp4_kms)
{
	DBG("");

	clk_prepare_enable(mdp4_kms->clk);
	if (mdp4_kms->pclk)
		clk_prepare_enable(mdp4_kms->pclk);
	clk_prepare_enable(mdp4_kms->lut_clk);

	return 0;
}

static int modeset_init(struct mdp4_kms *mdp4_kms)
{
	struct drm_device *dev = mdp4_kms->dev;
	struct msm_drm_private *priv = dev->dev_private;
	struct drm_plane *plane;
	struct drm_crtc *crtc;
	struct drm_encoder *encoder;
	struct drm_connector *connector;
	int ret;

	/*
	 *  NOTE: this is a bit simplistic until we add support
	 * for more than just RGB1->DMA_E->DTV->HDMI
	 */

	/* the CRTCs get constructed with a private plane: */
	plane = mdp4_plane_init(dev, RGB1, true);
	if (IS_ERR(plane)) {
		dev_err(dev->dev, "failed to construct plane for RGB1\n");
		ret = PTR_ERR(plane);
		goto fail;
	}

	crtc  = mdp4_crtc_init(dev, plane, priv->num_crtcs, 1, DMA_E);
	if (IS_ERR(crtc)) {
		dev_err(dev->dev, "failed to construct crtc for DMA_E\n");
		ret = PTR_ERR(crtc);
		goto fail;
	}
	priv->crtcs[priv->num_crtcs++] = crtc;

	encoder = mdp4_dtv_encoder_init(dev);
	if (IS_ERR(encoder)) {
		dev_err(dev->dev, "failed to construct DTV encoder\n");
		ret = PTR_ERR(encoder);
		goto fail;
	}
	encoder->possible_crtcs = 0x1;     /* DTV can be hooked to DMA_E */
	priv->encoders[priv->num_encoders++] = encoder;

	connector = hdmi_connector_init(dev, encoder);
	if (IS_ERR(connector)) {
		dev_err(dev->dev, "failed to construct HDMI connector\n");
		ret = PTR_ERR(connector);
		goto fail;
	}
	priv->connectors[priv->num_connectors++] = connector;

	return 0;

fail:
	return ret;
}

static const char *iommu_ports[] = {
		"mdp_port0_cb0", "mdp_port1_cb0",
};

struct msm_kms *mdp4_kms_init(struct drm_device *dev)
{
	struct platform_device *pdev = dev->platformdev;
	struct mdp4_platform_config *config = mdp4_get_config(pdev);
	struct mdp4_kms *mdp4_kms;
	struct msm_kms *kms = NULL;
	int ret;

	mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
	if (!mdp4_kms) {
		dev_err(dev->dev, "failed to allocate kms\n");
		ret = -ENOMEM;
		goto fail;
	}

	kms = &mdp4_kms->base;
	kms->funcs = &kms_funcs;

	mdp4_kms->dev = dev;

	mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4");
	if (IS_ERR(mdp4_kms->mmio)) {
		ret = PTR_ERR(mdp4_kms->mmio);
		goto fail;
	}

	mdp4_kms->dsi_pll_vdda = devm_regulator_get(&pdev->dev, "dsi_pll_vdda");
	if (IS_ERR(mdp4_kms->dsi_pll_vdda))
		mdp4_kms->dsi_pll_vdda = NULL;

	mdp4_kms->dsi_pll_vddio = devm_regulator_get(&pdev->dev, "dsi_pll_vddio");
	if (IS_ERR(mdp4_kms->dsi_pll_vddio))
		mdp4_kms->dsi_pll_vddio = NULL;

	mdp4_kms->vdd = devm_regulator_get(&pdev->dev, "vdd");
	if (IS_ERR(mdp4_kms->vdd))
		mdp4_kms->vdd = NULL;

	if (mdp4_kms->vdd) {
		ret = regulator_enable(mdp4_kms->vdd);
		if (ret) {
			dev_err(dev->dev, "failed to enable regulator vdd: %d\n", ret);
			goto fail;
		}
	}

	mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk");
	if (IS_ERR(mdp4_kms->clk)) {
		dev_err(dev->dev, "failed to get core_clk\n");
		ret = PTR_ERR(mdp4_kms->clk);
		goto fail;
	}

	mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk");
	if (IS_ERR(mdp4_kms->pclk))
		mdp4_kms->pclk = NULL;

	// XXX if (rev >= MDP_REV_42) { ???
	mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
	if (IS_ERR(mdp4_kms->lut_clk)) {
		dev_err(dev->dev, "failed to get lut_clk\n");
		ret = PTR_ERR(mdp4_kms->lut_clk);
		goto fail;
	}

	clk_set_rate(mdp4_kms->clk, config->max_clk);
	clk_set_rate(mdp4_kms->lut_clk, config->max_clk);

	if (!config->iommu) {
		dev_err(dev->dev, "no iommu\n");
		ret = -ENXIO;
		goto fail;
	}

	/* make sure things are off before attaching iommu (bootloader could
	 * have left things on, in which case we'll start getting faults if
	 * we don't disable):
	 */
	mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
	mdelay(16);

	ret = msm_iommu_attach(dev, config->iommu,
			iommu_ports, ARRAY_SIZE(iommu_ports));
	if (ret)
		goto fail;

	mdp4_kms->id = msm_register_iommu(dev, config->iommu);
	if (mdp4_kms->id < 0) {
		ret = mdp4_kms->id;
		dev_err(dev->dev, "failed to register mdp4 iommu: %d\n", ret);
		goto fail;
	}

	ret = modeset_init(mdp4_kms);
	if (ret) {
		dev_err(dev->dev, "modeset_init failed: %d\n", ret);
		goto fail;
	}

	return kms;

fail:
	if (kms)
		mdp4_destroy(kms);
	return ERR_PTR(ret);
}

static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev)
{
	static struct mdp4_platform_config config = {};
#ifdef CONFIG_OF
	/* TODO */
#else
	if (cpu_is_apq8064())
		config.max_clk = 266667000;
	else
		config.max_clk = 200000000;

	config.iommu = msm_get_iommu_domain(DISPLAY_READ_DOMAIN);
#endif
	return &config;
}
Commit	Line	Data
c8afe684 RC	1	/*
	2	* Copyright (C) 2013 Red Hat
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18
	19	#include "msm_drv.h"
	20	#include "mdp4_kms.h"
	21
	22	#include <mach/iommu.h>
	23
	24	static struct mdp4_platform_config mdp4_get_config(struct platform_device dev);
	25
	26	static int mdp4_hw_init(struct msm_kms *kms)
	27	{
	28	struct mdp4_kms *mdp4_kms = to_mdp4_kms(kms);
	29	struct drm_device *dev = mdp4_kms->dev;
	30	uint32_t version, major, minor, dmap_cfg, vg_cfg;
	31	unsigned long clk;
	32	int ret = 0;
	33
	34	pm_runtime_get_sync(dev->dev);
	35
	36	version = mdp4_read(mdp4_kms, REG_MDP4_VERSION);
	37
	38	major = FIELD(version, MDP4_VERSION_MAJOR);
	39	minor = FIELD(version, MDP4_VERSION_MINOR);
	40
	41	DBG("found MDP version v%d.%d", major, minor);
	42
	43	if (major != 4) {
	44	dev_err(dev->dev, "unexpected MDP version: v%d.%d\n",
	45	major, minor);
	46	ret = -ENXIO;
	47	goto out;
	48	}
	49
	50	mdp4_kms->rev = minor;
	51
	52	if (mdp4_kms->dsi_pll_vdda) {
	53	if ((mdp4_kms->rev == 2) \|\| (mdp4_kms->rev == 4)) {
	54	ret = regulator_set_voltage(mdp4_kms->dsi_pll_vdda,
	55	1200000, 1200000);
	56	if (ret) {
	57	dev_err(dev->dev,
	58	"failed to set dsi_pll_vdda voltage: %d\n", ret);
	59	goto out;
	60	}
	61	}
	62	}
	63
	64	if (mdp4_kms->dsi_pll_vddio) {
65	if (mdp4_kms->rev == 2) {
66	ret = regulator_set_voltage(mdp4_kms->dsi_pll_vddio,
67	1800000, 1800000);
68	if (ret) {
69	dev_err(dev->dev,
70	"failed to set dsi_pll_vddio voltage: %d\n", ret);
71	goto out;
72	}
73	}
74	}
75
76	if (mdp4_kms->rev > 1) {
77	mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff);
78	mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f);
79	}
80
81	mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3);
82
83	/* max read pending cmd config, 3 pending requests: */
84	mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222);
85
86	clk = clk_get_rate(mdp4_kms->clk);
87
88	if ((mdp4_kms->rev >= 1) \|\| (clk >= 90000000)) {
89	dmap_cfg = 0x47; /* 16 bytes-burst x 8 req */
90	vg_cfg = 0x47; /* 16 bytes-burs x 8 req */
91	} else {
92	dmap_cfg = 0x27; /* 8 bytes-burst x 8 req */
93	vg_cfg = 0x43; /* 16 bytes-burst x 4 req */
94	}
95
96	DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg);
97
98	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg);
99	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg);
100
101	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg);
102	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg);
103	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg);
104	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg);
105
106	if (mdp4_kms->rev >= 2)
107	mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1);
108
109	/* disable CSC matrix / YUV by default: */
110	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0);
111	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0);
112	mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0);
113	mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0);
114	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0);
115	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0);
116
117	if (mdp4_kms->rev > 1)
118	mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1);
119
120	out:
121	pm_runtime_put_sync(dev->dev);
122
123	return ret;
124	}
125
126	static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
127	struct drm_encoder *encoder)
128	{
129	/* if we had >1 encoder, we'd need something more clever: */
130	return mdp4_dtv_round_pixclk(encoder, rate);
131	}
132
133	static void mdp4_preclose(struct msm_kms kms, struct drm_file file)
134	{
135	struct mdp4_kms *mdp4_kms = to_mdp4_kms(kms);
136	struct msm_drm_private *priv = mdp4_kms->dev->dev_private;
137	unsigned i;
138
139	for (i = 0; i < priv->num_crtcs; i++)
140	mdp4_crtc_cancel_pending_flip(priv->crtcs[i]);
141	}
142
143	static void mdp4_destroy(struct msm_kms *kms)
144	{
145	struct mdp4_kms *mdp4_kms = to_mdp4_kms(kms);
146	kfree(mdp4_kms);
147	}
148
149	static const struct msm_kms_funcs kms_funcs = {
150	.hw_init = mdp4_hw_init,
151	.irq_preinstall = mdp4_irq_preinstall,
152	.irq_postinstall = mdp4_irq_postinstall,
153	.irq_uninstall = mdp4_irq_uninstall,
154	.irq = mdp4_irq,
155	.enable_vblank = mdp4_enable_vblank,
156	.disable_vblank = mdp4_disable_vblank,
157	.get_format = mdp4_get_format,
158	.round_pixclk = mdp4_round_pixclk,
159	.preclose = mdp4_preclose,
160	.destroy = mdp4_destroy,
161	};
162
163	int mdp4_disable(struct mdp4_kms *mdp4_kms)
164	{
165	DBG("");
166
167	clk_disable_unprepare(mdp4_kms->clk);
168	if (mdp4_kms->pclk)
169	clk_disable_unprepare(mdp4_kms->pclk);
170	clk_disable_unprepare(mdp4_kms->lut_clk);
171
172	return 0;
173	}
174
175	int mdp4_enable(struct mdp4_kms *mdp4_kms)
176	{
177	DBG("");
178
179	clk_prepare_enable(mdp4_kms->clk);
180	if (mdp4_kms->pclk)
181	clk_prepare_enable(mdp4_kms->pclk);
182	clk_prepare_enable(mdp4_kms->lut_clk);
183
184	return 0;
185	}
186
187	static int modeset_init(struct mdp4_kms *mdp4_kms)
188	{
189	struct drm_device *dev = mdp4_kms->dev;
190	struct msm_drm_private *priv = dev->dev_private;
191	struct drm_plane *plane;
192	struct drm_crtc *crtc;
193	struct drm_encoder *encoder;
194	struct drm_connector *connector;
195	int ret;
196
197	/*
198	* NOTE: this is a bit simplistic until we add support
199	* for more than just RGB1->DMA_E->DTV->HDMI
200	*/
201
202	/* the CRTCs get constructed with a private plane: */
203	plane = mdp4_plane_init(dev, RGB1, true);
204	if (IS_ERR(plane)) {
205	dev_err(dev->dev, "failed to construct plane for RGB1\n");
206	ret = PTR_ERR(plane);
207	goto fail;
208	}
209
210	crtc = mdp4_crtc_init(dev, plane, priv->num_crtcs, 1, DMA_E);
211	if (IS_ERR(crtc)) {
212	dev_err(dev->dev, "failed to construct crtc for DMA_E\n");
213	ret = PTR_ERR(crtc);
214	goto fail;
215	}
216	priv->crtcs[priv->num_crtcs++] = crtc;
217
218	encoder = mdp4_dtv_encoder_init(dev);
219	if (IS_ERR(encoder)) {
220	dev_err(dev->dev, "failed to construct DTV encoder\n");
221	ret = PTR_ERR(encoder);
222	goto fail;
223	}
224	encoder->possible_crtcs = 0x1; /* DTV can be hooked to DMA_E */
225	priv->encoders[priv->num_encoders++] = encoder;
226
227	connector = hdmi_connector_init(dev, encoder);
228	if (IS_ERR(connector)) {
229	dev_err(dev->dev, "failed to construct HDMI connector\n");
230	ret = PTR_ERR(connector);
231	goto fail;
232	}
233	priv->connectors[priv->num_connectors++] = connector;
234
235	return 0;
236
237	fail:
238	return ret;
239	}
240
241	static const char *iommu_ports[] = {
242	"mdp_port0_cb0", "mdp_port1_cb0",
243	};
244
245	struct msm_kms mdp4_kms_init(struct drm_device dev)
246	{
247	struct platform_device *pdev = dev->platformdev;
248	struct mdp4_platform_config *config = mdp4_get_config(pdev);
249	struct mdp4_kms *mdp4_kms;
250	struct msm_kms *kms = NULL;
251	int ret;
252
253	mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
254	if (!mdp4_kms) {
255	dev_err(dev->dev, "failed to allocate kms\n");
256	ret = -ENOMEM;
257	goto fail;
258	}
259
260	kms = &mdp4_kms->base;
261	kms->funcs = &kms_funcs;
262
263	mdp4_kms->dev = dev;
264
265	mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4");
266	if (IS_ERR(mdp4_kms->mmio)) {
267	ret = PTR_ERR(mdp4_kms->mmio);
268	goto fail;
269	}
270
271	mdp4_kms->dsi_pll_vdda = devm_regulator_get(&pdev->dev, "dsi_pll_vdda");
272	if (IS_ERR(mdp4_kms->dsi_pll_vdda))
273	mdp4_kms->dsi_pll_vdda = NULL;
274
275	mdp4_kms->dsi_pll_vddio = devm_regulator_get(&pdev->dev, "dsi_pll_vddio");
276	if (IS_ERR(mdp4_kms->dsi_pll_vddio))
277	mdp4_kms->dsi_pll_vddio = NULL;
278
279	mdp4_kms->vdd = devm_regulator_get(&pdev->dev, "vdd");
280	if (IS_ERR(mdp4_kms->vdd))
281	mdp4_kms->vdd = NULL;
282
283	if (mdp4_kms->vdd) {
284	ret = regulator_enable(mdp4_kms->vdd);
285	if (ret) {
286	dev_err(dev->dev, "failed to enable regulator vdd: %d\n", ret);
287	goto fail;
288	}
289	}
290
291	mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk");
292	if (IS_ERR(mdp4_kms->clk)) {
293	dev_err(dev->dev, "failed to get core_clk\n");
294	ret = PTR_ERR(mdp4_kms->clk);
295	goto fail;
296	}
297
298	mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk");
299	if (IS_ERR(mdp4_kms->pclk))
300	mdp4_kms->pclk = NULL;
301
302	// XXX if (rev >= MDP_REV_42) { ???
303	mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
304	if (IS_ERR(mdp4_kms->lut_clk)) {
305	dev_err(dev->dev, "failed to get lut_clk\n");
306	ret = PTR_ERR(mdp4_kms->lut_clk);
307	goto fail;
308	}
309
310	clk_set_rate(mdp4_kms->clk, config->max_clk);
311	clk_set_rate(mdp4_kms->lut_clk, config->max_clk);
312
313	if (!config->iommu) {
314	dev_err(dev->dev, "no iommu\n");
315	ret = -ENXIO;
316	goto fail;
317	}
318
319	/* make sure things are off before attaching iommu (bootloader could
320	* have left things on, in which case we'll start getting faults if
321	* we don't disable):
322	*/
323	mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
324	mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0);
325	mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
326	mdelay(16);
327
328	ret = msm_iommu_attach(dev, config->iommu,
329	iommu_ports, ARRAY_SIZE(iommu_ports));
330	if (ret)
331	goto fail;
332
333	mdp4_kms->id = msm_register_iommu(dev, config->iommu);
334	if (mdp4_kms->id < 0) {
335	ret = mdp4_kms->id;
336	dev_err(dev->dev, "failed to register mdp4 iommu: %d\n", ret);
337	goto fail;
338	}
339
340	ret = modeset_init(mdp4_kms);
341	if (ret) {
342	dev_err(dev->dev, "modeset_init failed: %d\n", ret);
343	goto fail;
344	}
345
346	return kms;
347
348	fail:
349	if (kms)
350	mdp4_destroy(kms);
351	return ERR_PTR(ret);
352	}
353
354	static struct mdp4_platform_config mdp4_get_config(struct platform_device dev)
355	{
356	static struct mdp4_platform_config config = {};
357	#ifdef CONFIG_OF
358	/* TODO */
359	#else
360	if (cpu_is_apq8064())
361	config.max_clk = 266667000;
362	else
363	config.max_clk = 200000000;
364
365	config.iommu = msm_get_iommu_domain(DISPLAY_READ_DOMAIN);
366	#endif
367	return &config;
368	}