301 lines
8 KiB
C
301 lines
8 KiB
C
/*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Rob Clark <rob@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include "omap_drv.h"
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/*
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* connector funcs
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*/
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#define to_omap_connector(x) container_of(x, struct omap_connector, base)
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struct omap_connector {
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struct drm_connector base;
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struct omap_dss_device *dssdev;
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bool hdmi_mode;
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};
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static void omap_connector_hpd_cb(void *cb_data,
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enum drm_connector_status status)
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{
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struct omap_connector *omap_connector = cb_data;
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struct drm_connector *connector = &omap_connector->base;
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struct drm_device *dev = connector->dev;
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enum drm_connector_status old_status;
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mutex_lock(&dev->mode_config.mutex);
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old_status = connector->status;
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connector->status = status;
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mutex_unlock(&dev->mode_config.mutex);
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if (old_status != status)
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drm_kms_helper_hotplug_event(dev);
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}
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bool omap_connector_get_hdmi_mode(struct drm_connector *connector)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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return omap_connector->hdmi_mode;
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}
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static enum drm_connector_status omap_connector_detect(
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struct drm_connector *connector, bool force)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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struct omap_dss_device *dssdev = omap_connector->dssdev;
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struct omap_dss_driver *dssdrv = dssdev->driver;
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enum drm_connector_status ret;
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if (dssdrv->detect) {
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if (dssdrv->detect(dssdev))
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ret = connector_status_connected;
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else
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ret = connector_status_disconnected;
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} else if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
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dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
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dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
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dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
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ret = connector_status_connected;
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} else {
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ret = connector_status_unknown;
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}
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VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
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return ret;
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}
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static void omap_connector_destroy(struct drm_connector *connector)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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struct omap_dss_device *dssdev = omap_connector->dssdev;
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DBG("%s", omap_connector->dssdev->name);
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if (connector->polled == DRM_CONNECTOR_POLL_HPD &&
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dssdev->driver->unregister_hpd_cb) {
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dssdev->driver->unregister_hpd_cb(dssdev);
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}
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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kfree(omap_connector);
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omap_dss_put_device(dssdev);
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}
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#define MAX_EDID 512
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static int omap_connector_get_modes(struct drm_connector *connector)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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struct omap_dss_device *dssdev = omap_connector->dssdev;
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struct omap_dss_driver *dssdrv = dssdev->driver;
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struct drm_device *dev = connector->dev;
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int n = 0;
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DBG("%s", omap_connector->dssdev->name);
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/* if display exposes EDID, then we parse that in the normal way to
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* build table of supported modes.. otherwise (ie. fixed resolution
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* LCD panels) we just return a single mode corresponding to the
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* currently configured timings:
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*/
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if (dssdrv->read_edid) {
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void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
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if (!edid)
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return 0;
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if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
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drm_edid_is_valid(edid)) {
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drm_connector_update_edid_property(
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connector, edid);
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n = drm_add_edid_modes(connector, edid);
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omap_connector->hdmi_mode =
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drm_detect_hdmi_monitor(edid);
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} else {
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drm_connector_update_edid_property(
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connector, NULL);
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}
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kfree(edid);
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} else {
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struct drm_display_mode *mode = drm_mode_create(dev);
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struct videomode vm = {0};
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if (!mode)
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return 0;
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dssdrv->get_timings(dssdev, &vm);
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drm_display_mode_from_videomode(&vm, mode);
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mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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if (dssdrv->get_size) {
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dssdrv->get_size(dssdev,
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&connector->display_info.width_mm,
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&connector->display_info.height_mm);
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}
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n = 1;
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}
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return n;
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}
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static int omap_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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struct omap_dss_device *dssdev = omap_connector->dssdev;
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struct omap_dss_driver *dssdrv = dssdev->driver;
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struct videomode vm = {0};
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struct drm_device *dev = connector->dev;
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struct drm_display_mode *new_mode;
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int r, ret = MODE_BAD;
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drm_display_mode_to_videomode(mode, &vm);
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mode->vrefresh = drm_mode_vrefresh(mode);
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/*
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* if the panel driver doesn't have a check_timings, it's most likely
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* a fixed resolution panel, check if the timings match with the
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* panel's timings
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*/
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if (dssdrv->check_timings) {
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r = dssdrv->check_timings(dssdev, &vm);
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} else {
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struct videomode t = {0};
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dssdrv->get_timings(dssdev, &t);
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/*
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* Ignore the flags, as we don't get them from
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* drm_display_mode_to_videomode.
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*/
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t.flags = 0;
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if (memcmp(&vm, &t, sizeof(vm)))
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r = -EINVAL;
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else
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r = 0;
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}
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if (!r) {
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/* check if vrefresh is still valid */
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new_mode = drm_mode_duplicate(dev, mode);
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if (!new_mode)
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return MODE_BAD;
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new_mode->clock = vm.pixelclock / 1000;
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new_mode->vrefresh = 0;
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if (mode->vrefresh == drm_mode_vrefresh(new_mode))
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ret = MODE_OK;
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drm_mode_destroy(dev, new_mode);
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}
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DBG("connector: mode %s: "
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"%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
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(ret == MODE_OK) ? "valid" : "invalid",
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mode->base.id, mode->name, mode->vrefresh, mode->clock,
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mode->hdisplay, mode->hsync_start,
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mode->hsync_end, mode->htotal,
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mode->vdisplay, mode->vsync_start,
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mode->vsync_end, mode->vtotal, mode->type, mode->flags);
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return ret;
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}
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static const struct drm_connector_funcs omap_connector_funcs = {
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.reset = drm_atomic_helper_connector_reset,
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.detect = omap_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = omap_connector_destroy,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
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.get_modes = omap_connector_get_modes,
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.mode_valid = omap_connector_mode_valid,
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};
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/* initialize connector */
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struct drm_connector *omap_connector_init(struct drm_device *dev,
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int connector_type, struct omap_dss_device *dssdev,
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struct drm_encoder *encoder)
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{
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struct drm_connector *connector = NULL;
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struct omap_connector *omap_connector;
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bool hpd_supported = false;
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DBG("%s", dssdev->name);
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omap_dss_get_device(dssdev);
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omap_connector = kzalloc(sizeof(*omap_connector), GFP_KERNEL);
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if (!omap_connector)
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goto fail;
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omap_connector->dssdev = dssdev;
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connector = &omap_connector->base;
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drm_connector_init(dev, connector, &omap_connector_funcs,
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connector_type);
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drm_connector_helper_add(connector, &omap_connector_helper_funcs);
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if (dssdev->driver->register_hpd_cb) {
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int ret = dssdev->driver->register_hpd_cb(dssdev,
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omap_connector_hpd_cb,
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omap_connector);
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if (!ret)
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hpd_supported = true;
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else if (ret != -ENOTSUPP)
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DBG("%s: Failed to register HPD callback (%d).",
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dssdev->name, ret);
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}
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if (hpd_supported)
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connector->polled = DRM_CONNECTOR_POLL_HPD;
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else if (dssdev->driver->detect)
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connector->polled = DRM_CONNECTOR_POLL_CONNECT |
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DRM_CONNECTOR_POLL_DISCONNECT;
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else
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connector->polled = 0;
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connector->interlace_allowed = 1;
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connector->doublescan_allowed = 0;
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return connector;
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fail:
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if (connector)
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omap_connector_destroy(connector);
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return NULL;
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}
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