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/*
* drivers/gpu/drm/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 <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "omap_drv.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;
bool hdmi_mode;
};
bool omap_connector_get_hdmi_mode(struct drm_connector *connector)
{
struct omap_connector *omap_connector = to_omap_connector(connector);
return omap_connector->hdmi_mode;
}
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 if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
ret = connector_status_connected;
} 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_connector_unregister(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);
omap_connector->hdmi_mode =
drm_detect_hdmi_monitor(edid);
} else {
drm_mode_connector_update_edid_property(
connector, NULL);
}
kfree(edid);
} else {
struct drm_display_mode *mode = drm_mode_create(dev);
struct videomode vm = {0};
dssdrv->get_timings(dssdev, &vm);
drm_display_mode_from_videomode(&vm, mode);
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 videomode vm = {0};
struct drm_device *dev = connector->dev;
struct drm_display_mode *new_mode;
int r, ret = MODE_BAD;
drm_display_mode_to_videomode(mode, &vm);
mode->vrefresh = drm_mode_vrefresh(mode);
/*
* if the panel driver doesn't have a check_timings, it's most likely
* a fixed resolution panel, check if the timings match with the
* panel's timings
*/
if (dssdrv->check_timings) {
r = dssdrv->check_timings(dssdev, &vm);
} else {
struct videomode t = {0};
dssdrv->get_timings(dssdev, &t);
/*
* Ignore the flags, as we don't get them from
* drm_display_mode_to_videomode.
*/
t.flags = 0;
if (memcmp(&vm, &t, sizeof(vm)))
r = -EINVAL;
else
r = 0;
}
if (!r) {
/* check if vrefresh is still valid */
new_mode = drm_mode_duplicate(dev, mode);
new_mode->clock = vm.pixelclock / 1000;
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;
}
static const struct drm_connector_funcs omap_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.detect = omap_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = omap_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
.get_modes = omap_connector_get_modes,
.mode_valid = omap_connector_mode_valid,
};
/* 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(*omap_connector), GFP_KERNEL);
if (!omap_connector)
goto fail;
omap_connector->dssdev = dssdev;
connector = &omap_connector->base;
drm_connector_init(dev, connector, &omap_connector_funcs,
connector_type);
drm_connector_helper_add(connector, &omap_connector_helper_funcs);
if (dssdev->driver->detect)
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
else
connector->polled = 0;
connector->interlace_allowed = 1;
connector->doublescan_allowed = 0;
return connector;
fail:
if (connector)
omap_connector_destroy(connector);
return NULL;
}
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