[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / omapdrm / omap_connector.c

/*
 * drivers/staging/omapdrm/omap_connector.c
 *
 * Copyright (C) 2011 Texas Instruments
 * Author: Rob Clark <rob@ti.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 "omap_drv.h"

#include "drm_crtc.h"
#include "drm_crtc_helper.h"

/*
 * connector funcs
 */

#define to_omap_connector(x) container_of(x, struct omap_connector, base)

struct omap_connector {
	struct drm_connector base;
	struct omap_dss_device *dssdev;
	struct drm_encoder *encoder;
};

void copy_timings_omap_to_drm(struct drm_display_mode *mode,
		struct omap_video_timings *timings)
{
	mode->clock = timings->pixel_clock;

	mode->hdisplay = timings->x_res;
	mode->hsync_start = mode->hdisplay + timings->hfp;
	mode->hsync_end = mode->hsync_start + timings->hsw;
	mode->htotal = mode->hsync_end + timings->hbp;

	mode->vdisplay = timings->y_res;
	mode->vsync_start = mode->vdisplay + timings->vfp;
	mode->vsync_end = mode->vsync_start + timings->vsw;
	mode->vtotal = mode->vsync_end + timings->vbp;

	mode->flags = 0;

	if (timings->interlace)
		mode->flags |= DRM_MODE_FLAG_INTERLACE;

	if (timings->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
		mode->flags |= DRM_MODE_FLAG_PHSYNC;
	else
		mode->flags |= DRM_MODE_FLAG_NHSYNC;

	if (timings->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
		mode->flags |= DRM_MODE_FLAG_PVSYNC;
	else
		mode->flags |= DRM_MODE_FLAG_NVSYNC;
}

void copy_timings_drm_to_omap(struct omap_video_timings *timings,
		struct drm_display_mode *mode)
{
	timings->pixel_clock = mode->clock;

	timings->x_res = mode->hdisplay;
	timings->hfp = mode->hsync_start - mode->hdisplay;
	timings->hsw = mode->hsync_end - mode->hsync_start;
	timings->hbp = mode->htotal - mode->hsync_end;

	timings->y_res = mode->vdisplay;
	timings->vfp = mode->vsync_start - mode->vdisplay;
	timings->vsw = mode->vsync_end - mode->vsync_start;
	timings->vbp = mode->vtotal - mode->vsync_end;

	timings->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);

	if (mode->flags & DRM_MODE_FLAG_PHSYNC)
		timings->hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
	else
		timings->hsync_level = OMAPDSS_SIG_ACTIVE_LOW;

	if (mode->flags & DRM_MODE_FLAG_PVSYNC)
		timings->vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
	else
		timings->vsync_level = OMAPDSS_SIG_ACTIVE_LOW;

	timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
	timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
	timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
}

static enum drm_connector_status omap_connector_detect(
		struct drm_connector *connector, bool force)
{
	struct omap_connector *omap_connector = to_omap_connector(connector);
	struct omap_dss_device *dssdev = omap_connector->dssdev;
	struct omap_dss_driver *dssdrv = dssdev->driver;
	enum drm_connector_status ret;

	if (dssdrv->detect) {
		if (dssdrv->detect(dssdev))
			ret = connector_status_connected;
		else
			ret = connector_status_disconnected;
	} else {
		ret = connector_status_unknown;
	}

	VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);

	return ret;
}

static void omap_connector_destroy(struct drm_connector *connector)
{
	struct omap_connector *omap_connector = to_omap_connector(connector);
	struct omap_dss_device *dssdev = omap_connector->dssdev;

	DBG("%s", omap_connector->dssdev->name);
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(omap_connector);

	omap_dss_put_device(dssdev);
}

#define MAX_EDID  512

static int omap_connector_get_modes(struct drm_connector *connector)
{
	struct omap_connector *omap_connector = to_omap_connector(connector);
	struct omap_dss_device *dssdev = omap_connector->dssdev;
	struct omap_dss_driver *dssdrv = dssdev->driver;
	struct drm_device *dev = connector->dev;
	int n = 0;

	DBG("%s", omap_connector->dssdev->name);

	/* if display exposes EDID, then we parse that in the normal way to
	 * build table of supported modes.. otherwise (ie. fixed resolution
	 * LCD panels) we just return a single mode corresponding to the
	 * currently configured timings:
	 */
	if (dssdrv->read_edid) {
		void *edid = kzalloc(MAX_EDID, GFP_KERNEL);

		if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
				drm_edid_is_valid(edid)) {
			drm_mode_connector_update_edid_property(
					connector, edid);
			n = drm_add_edid_modes(connector, edid);
		} else {
			drm_mode_connector_update_edid_property(
					connector, NULL);
		}
		kfree(edid);
	} else {
		struct drm_display_mode *mode = drm_mode_create(dev);
		struct omap_video_timings timings = {0};

		dssdrv->get_timings(dssdev, &timings);

		copy_timings_omap_to_drm(mode, &timings);

		mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
		drm_mode_set_name(mode);
		drm_mode_probed_add(connector, mode);

		n = 1;
	}

	return n;
}

static int omap_connector_mode_valid(struct drm_connector *connector,
				 struct drm_display_mode *mode)
{
	struct omap_connector *omap_connector = to_omap_connector(connector);
	struct omap_dss_device *dssdev = omap_connector->dssdev;
	struct omap_dss_driver *dssdrv = dssdev->driver;
	struct omap_video_timings timings = {0};
	struct drm_device *dev = connector->dev;
	struct drm_display_mode *new_mode;
	int ret = MODE_BAD;

	copy_timings_drm_to_omap(&timings, mode);
	mode->vrefresh = drm_mode_vrefresh(mode);

	if (!dssdrv->check_timings(dssdev, &timings)) {
		/* check if vrefresh is still valid */
		new_mode = drm_mode_duplicate(dev, mode);
		new_mode->clock = timings.pixel_clock;
		new_mode->vrefresh = 0;
		if (mode->vrefresh == drm_mode_vrefresh(new_mode))
			ret = MODE_OK;
		drm_mode_destroy(dev, new_mode);
	}

	DBG("connector: mode %s: "
			"%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
			(ret == MODE_OK) ? "valid" : "invalid",
			mode->base.id, mode->name, mode->vrefresh, mode->clock,
			mode->hdisplay, mode->hsync_start,
			mode->hsync_end, mode->htotal,
			mode->vdisplay, mode->vsync_start,
			mode->vsync_end, mode->vtotal, mode->type, mode->flags);

	return ret;
}

struct drm_encoder *omap_connector_attached_encoder(
		struct drm_connector *connector)
{
	struct omap_connector *omap_connector = to_omap_connector(connector);
	return omap_connector->encoder;
}

static const struct drm_connector_funcs omap_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = omap_connector_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = omap_connector_destroy,
};

static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
	.get_modes = omap_connector_get_modes,
	.mode_valid = omap_connector_mode_valid,
	.best_encoder = omap_connector_attached_encoder,
};

/* flush an area of the framebuffer (in case of manual update display that
 * is not automatically flushed)
 */
void omap_connector_flush(struct drm_connector *connector,
		int x, int y, int w, int h)
{
	struct omap_connector *omap_connector = to_omap_connector(connector);

	/* TODO: enable when supported in dss */
	VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
}

/* initialize connector */
struct drm_connector *omap_connector_init(struct drm_device *dev,
		int connector_type, struct omap_dss_device *dssdev,
		struct drm_encoder *encoder)
{
	struct drm_connector *connector = NULL;
	struct omap_connector *omap_connector;

	DBG("%s", dssdev->name);

	omap_dss_get_device(dssdev);

	omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
	if (!omap_connector) {
		dev_err(dev->dev, "could not allocate connector\n");
		goto fail;
	}

	omap_connector->dssdev = dssdev;
	omap_connector->encoder = encoder;

	connector = &omap_connector->base;

	drm_connector_init(dev, connector, &omap_connector_funcs,
				connector_type);
	drm_connector_helper_add(connector, &omap_connector_helper_funcs);

#if 0 /* enable when dss2 supports hotplug */
	if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
		connector->polled = 0;
	else
#endif
		connector->polled = DRM_CONNECTOR_POLL_CONNECT |
				DRM_CONNECTOR_POLL_DISCONNECT;

	connector->interlace_allowed = 1;
	connector->doublescan_allowed = 0;

	drm_sysfs_connector_add(connector);

	return connector;

fail:
	if (connector)
		omap_connector_destroy(connector);

	return NULL;
}
Commit	Line	Data
cd5351f4 RC	1	/*
	2	* drivers/staging/omapdrm/omap_connector.c
	3	*
	4	* Copyright (C) 2011 Texas Instruments
	5	* Author: Rob Clark <rob@ti.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License version 2 as published by
	9	* the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include "omap_drv.h"
	21
	22	#include "drm_crtc.h"
	23	#include "drm_crtc_helper.h"
	24
	25	/*
	26	* connector funcs
	27	*/
	28
	29	#define to_omap_connector(x) container_of(x, struct omap_connector, base)
	30
	31	struct omap_connector {
	32	struct drm_connector base;
	33	struct omap_dss_device *dssdev;
f5f9454c	34	struct drm_encoder *encoder;
cd5351f4 RC	35	};
cd5351f4 RC	36
f5f9454c	37	void copy_timings_omap_to_drm(struct drm_display_mode *mode,
cd5351f4 RC	38	struct omap_video_timings *timings)
	39	{
	40	mode->clock = timings->pixel_clock;
	41
	42	mode->hdisplay = timings->x_res;
	43	mode->hsync_start = mode->hdisplay + timings->hfp;
	44	mode->hsync_end = mode->hsync_start + timings->hsw;
	45	mode->htotal = mode->hsync_end + timings->hbp;
	46
	47	mode->vdisplay = timings->y_res;
	48	mode->vsync_start = mode->vdisplay + timings->vfp;
	49	mode->vsync_end = mode->vsync_start + timings->vsw;
	50	mode->vtotal = mode->vsync_end + timings->vbp;
	51
0b0d7b62 RC	52	mode->flags = 0;
	53
	54	if (timings->interlace)
	55	mode->flags \|= DRM_MODE_FLAG_INTERLACE;
94254edc RC	56
	57	if (timings->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
	58	mode->flags \|= DRM_MODE_FLAG_PHSYNC;
	59	else
	60	mode->flags \|= DRM_MODE_FLAG_NHSYNC;
	61
	62	if (timings->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
	63	mode->flags \|= DRM_MODE_FLAG_PVSYNC;
	64	else
	65	mode->flags \|= DRM_MODE_FLAG_NVSYNC;
cd5351f4 RC	66	}
cd5351f4 RC	67
f5f9454c	68	void copy_timings_drm_to_omap(struct omap_video_timings *timings,
cd5351f4 RC	69	struct drm_display_mode *mode)
	70	{
	71	timings->pixel_clock = mode->clock;
	72
	73	timings->x_res = mode->hdisplay;
	74	timings->hfp = mode->hsync_start - mode->hdisplay;
	75	timings->hsw = mode->hsync_end - mode->hsync_start;
	76	timings->hbp = mode->htotal - mode->hsync_end;
	77
	78	timings->y_res = mode->vdisplay;
	79	timings->vfp = mode->vsync_start - mode->vdisplay;
	80	timings->vsw = mode->vsync_end - mode->vsync_start;
	81	timings->vbp = mode->vtotal - mode->vsync_end;
0b0d7b62 RC	82
0b0d7b62 RC	83	timings->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
94254edc RC	84
	85	if (mode->flags & DRM_MODE_FLAG_PHSYNC)
	86	timings->hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
	87	else
	88	timings->hsync_level = OMAPDSS_SIG_ACTIVE_LOW;
	89
	90	if (mode->flags & DRM_MODE_FLAG_PVSYNC)
	91	timings->vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
	92	else
	93	timings->vsync_level = OMAPDSS_SIG_ACTIVE_LOW;
	94
	95	timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
	96	timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
	97	timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
cd5351f4 RC	98	}
cd5351f4 RC	99
f5f9454c	100	static enum drm_connector_status omap_connector_detect(
cd5351f4 RC	101	struct drm_connector *connector, bool force)
	102	{
	103	struct omap_connector *omap_connector = to_omap_connector(connector);
	104	struct omap_dss_device *dssdev = omap_connector->dssdev;
	105	struct omap_dss_driver *dssdrv = dssdev->driver;
	106	enum drm_connector_status ret;
	107
	108	if (dssdrv->detect) {
fdbf20b3	109	if (dssdrv->detect(dssdev))
cd5351f4	110	ret = connector_status_connected;
fdbf20b3	111	else
cd5351f4	112	ret = connector_status_disconnected;
cd5351f4 RC	113	} else {
	114	ret = connector_status_unknown;
	115	}
	116
	117	VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
	118
	119	return ret;
	120	}
	121
	122	static void omap_connector_destroy(struct drm_connector *connector)
	123	{
	124	struct omap_connector *omap_connector = to_omap_connector(connector);
	125	struct omap_dss_device *dssdev = omap_connector->dssdev;
	126
cd5351f4 RC	127	DBG("%s", omap_connector->dssdev->name);
	128	drm_sysfs_connector_remove(connector);
	129	drm_connector_cleanup(connector);
	130	kfree(omap_connector);
	131
	132	omap_dss_put_device(dssdev);
	133	}
	134
	135	#define MAX_EDID 512
	136
	137	static int omap_connector_get_modes(struct drm_connector *connector)
	138	{
	139	struct omap_connector *omap_connector = to_omap_connector(connector);
	140	struct omap_dss_device *dssdev = omap_connector->dssdev;
	141	struct omap_dss_driver *dssdrv = dssdev->driver;
	142	struct drm_device *dev = connector->dev;
	143	int n = 0;
	144
	145	DBG("%s", omap_connector->dssdev->name);
	146
	147	/* if display exposes EDID, then we parse that in the normal way to
	148	* build table of supported modes.. otherwise (ie. fixed resolution
	149	* LCD panels) we just return a single mode corresponding to the
	150	* currently configured timings:
	151	*/
	152	if (dssdrv->read_edid) {
	153	void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
	154
	155	if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
	156	drm_edid_is_valid(edid)) {
	157	drm_mode_connector_update_edid_property(
	158	connector, edid);
	159	n = drm_add_edid_modes(connector, edid);
cd5351f4 RC	160	} else {
	161	drm_mode_connector_update_edid_property(
	162	connector, NULL);
cd5351f4	163	}
451023dc	164	kfree(edid);
cd5351f4 RC	165	} else {
cd5351f4 RC	166	struct drm_display_mode *mode = drm_mode_create(dev);
0b0d7b62	167	struct omap_video_timings timings = {0};
cd5351f4 RC	168
	169	dssdrv->get_timings(dssdev, &timings);
	170
	171	copy_timings_omap_to_drm(mode, &timings);
	172
	173	mode->type = DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED;
	174	drm_mode_set_name(mode);
	175	drm_mode_probed_add(connector, mode);
	176
	177	n = 1;
	178	}
	179
	180	return n;
	181	}
	182
	183	static int omap_connector_mode_valid(struct drm_connector *connector,
	184	struct drm_display_mode *mode)
	185	{
	186	struct omap_connector *omap_connector = to_omap_connector(connector);
	187	struct omap_dss_device *dssdev = omap_connector->dssdev;
	188	struct omap_dss_driver *dssdrv = dssdev->driver;
	189	struct omap_video_timings timings = {0};
	190	struct drm_device *dev = connector->dev;
	191	struct drm_display_mode *new_mode;
	192	int ret = MODE_BAD;
	193
	194	copy_timings_drm_to_omap(&timings, mode);
	195	mode->vrefresh = drm_mode_vrefresh(mode);
	196
	197	if (!dssdrv->check_timings(dssdev, &timings)) {
	198	/* check if vrefresh is still valid */
	199	new_mode = drm_mode_duplicate(dev, mode);
	200	new_mode->clock = timings.pixel_clock;
	201	new_mode->vrefresh = 0;
	202	if (mode->vrefresh == drm_mode_vrefresh(new_mode))
	203	ret = MODE_OK;
	204	drm_mode_destroy(dev, new_mode);
	205	}
	206
	207	DBG("connector: mode %s: "
	208	"%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
	209	(ret == MODE_OK) ? "valid" : "invalid",
	210	mode->base.id, mode->name, mode->vrefresh, mode->clock,
	211	mode->hdisplay, mode->hsync_start,
	212	mode->hsync_end, mode->htotal,
	213	mode->vdisplay, mode->vsync_start,
	214	mode->vsync_end, mode->vtotal, mode->type, mode->flags);
	215
	216	return ret;
	217	}
	218
	219	struct drm_encoder *omap_connector_attached_encoder(
	220	struct drm_connector *connector)
	221	{
cd5351f4	222	struct omap_connector *omap_connector = to_omap_connector(connector);
f5f9454c	223	return omap_connector->encoder;
cd5351f4 RC	224	}
	225
	226	static const struct drm_connector_funcs omap_connector_funcs = {
f5f9454c	227	.dpms = drm_helper_connector_dpms,
cd5351f4 RC	228	.detect = omap_connector_detect,
	229	.fill_modes = drm_helper_probe_single_connector_modes,
	230	.destroy = omap_connector_destroy,
	231	};
	232
	233	static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
	234	.get_modes = omap_connector_get_modes,
	235	.mode_valid = omap_connector_mode_valid,
	236	.best_encoder = omap_connector_attached_encoder,
	237	};
	238
cd5351f4 RC	239	/* flush an area of the framebuffer (in case of manual update display that
	240	* is not automatically flushed)
	241	*/
	242	void omap_connector_flush(struct drm_connector *connector,
	243	int x, int y, int w, int h)
	244	{
	245	struct omap_connector *omap_connector = to_omap_connector(connector);
	246
	247	/* TODO: enable when supported in dss */
	248	VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
	249	}
	250
	251	/* initialize connector */
	252	struct drm_connector omap_connector_init(struct drm_device dev,
f5f9454c RC	253	int connector_type, struct omap_dss_device *dssdev,
f5f9454c RC	254	struct drm_encoder *encoder)
cd5351f4 RC	255	{
	256	struct drm_connector *connector = NULL;
	257	struct omap_connector *omap_connector;
	258
	259	DBG("%s", dssdev->name);
	260
	261	omap_dss_get_device(dssdev);
	262
	263	omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
	264	if (!omap_connector) {
	265	dev_err(dev->dev, "could not allocate connector\n");
	266	goto fail;
	267	}
	268
	269	omap_connector->dssdev = dssdev;
f5f9454c RC	270	omap_connector->encoder = encoder;
f5f9454c RC	271
cd5351f4 RC	272	connector = &omap_connector->base;
	273
	274	drm_connector_init(dev, connector, &omap_connector_funcs,
	275	connector_type);
	276	drm_connector_helper_add(connector, &omap_connector_helper_funcs);
	277
	278	#if 0 /* enable when dss2 supports hotplug */
	279	if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
	280	connector->polled = 0;
	281	else
	282	#endif
	283	connector->polled = DRM_CONNECTOR_POLL_CONNECT \|
	284	DRM_CONNECTOR_POLL_DISCONNECT;
	285
	286	connector->interlace_allowed = 1;
	287	connector->doublescan_allowed = 0;
	288
	289	drm_sysfs_connector_add(connector);
	290
	291	return connector;
	292
	293	fail:
fdbf20b3	294	if (connector)
cd5351f4	295	omap_connector_destroy(connector);
cd5351f4 RC	296
	297	return NULL;
	298	}