372 lines
10 KiB
C
372 lines
10 KiB
C
/*
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* drivers/staging/omapdrm/omap_connector.c
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*
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* Copyright (C) 2011 Texas Instruments
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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 "omap_drv.h"
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#include "drm_crtc.h"
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#include "drm_crtc_helper.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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};
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static inline void copy_timings_omap_to_drm(struct drm_display_mode *mode,
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struct omap_video_timings *timings)
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{
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mode->clock = timings->pixel_clock;
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mode->hdisplay = timings->x_res;
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mode->hsync_start = mode->hdisplay + timings->hfp;
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mode->hsync_end = mode->hsync_start + timings->hsw;
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mode->htotal = mode->hsync_end + timings->hbp;
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mode->vdisplay = timings->y_res;
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mode->vsync_start = mode->vdisplay + timings->vfp;
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mode->vsync_end = mode->vsync_start + timings->vsw;
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mode->vtotal = mode->vsync_end + timings->vbp;
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/* note: whether or not it is interlaced, +/- h/vsync, etc,
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* which should be set in the mode flags, is not exposed in
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* the omap_video_timings struct.. but hdmi driver tracks
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* those separately so all we have to have to set the mode
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* is the way to recover these timings values, and the
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* omap_dss_driver would do the rest.
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*/
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}
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static inline void copy_timings_drm_to_omap(struct omap_video_timings *timings,
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struct drm_display_mode *mode)
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{
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timings->pixel_clock = mode->clock;
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timings->x_res = mode->hdisplay;
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timings->hfp = mode->hsync_start - mode->hdisplay;
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timings->hsw = mode->hsync_end - mode->hsync_start;
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timings->hbp = mode->htotal - mode->hsync_end;
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timings->y_res = mode->vdisplay;
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timings->vfp = mode->vsync_start - mode->vdisplay;
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timings->vsw = mode->vsync_end - mode->vsync_start;
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timings->vbp = mode->vtotal - mode->vsync_end;
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}
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static void omap_connector_dpms(struct drm_connector *connector, int 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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int old_dpms;
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DBG("%s: %d", dssdev->name, mode);
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old_dpms = connector->dpms;
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/* from off to on, do from crtc to connector */
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if (mode < old_dpms)
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drm_helper_connector_dpms(connector, mode);
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if (mode == DRM_MODE_DPMS_ON) {
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/* store resume info for suspended displays */
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switch (dssdev->state) {
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case OMAP_DSS_DISPLAY_SUSPENDED:
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dssdev->activate_after_resume = true;
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break;
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case OMAP_DSS_DISPLAY_DISABLED: {
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int ret = dssdev->driver->enable(dssdev);
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if (ret) {
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DBG("%s: failed to enable: %d",
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dssdev->name, ret);
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dssdev->driver->disable(dssdev);
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}
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break;
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}
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default:
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break;
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}
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} else {
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/* TODO */
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}
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/* from on to off, do from connector to crtc */
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if (mode > old_dpms)
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drm_helper_connector_dpms(connector, mode);
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}
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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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}
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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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dssdev->driver->disable(dssdev);
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DBG("%s", omap_connector->dssdev->name);
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drm_sysfs_connector_remove(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 ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
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drm_edid_is_valid(edid)) {
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drm_mode_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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kfree(connector->display_info.raw_edid);
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connector->display_info.raw_edid = edid;
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} else {
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drm_mode_connector_update_edid_property(
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connector, NULL);
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connector->display_info.raw_edid = NULL;
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kfree(edid);
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}
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} else {
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struct drm_display_mode *mode = drm_mode_create(dev);
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struct omap_video_timings timings;
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dssdrv->get_timings(dssdev, &timings);
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copy_timings_omap_to_drm(mode, &timings);
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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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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 omap_video_timings timings = {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 ret = MODE_BAD;
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copy_timings_drm_to_omap(&timings, mode);
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mode->vrefresh = drm_mode_vrefresh(mode);
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if (!dssdrv->check_timings(dssdev, &timings)) {
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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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new_mode->clock = timings.pixel_clock;
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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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struct drm_encoder *omap_connector_attached_encoder(
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struct drm_connector *connector)
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{
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int i;
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struct omap_connector *omap_connector = to_omap_connector(connector);
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for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
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struct drm_mode_object *obj;
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if (connector->encoder_ids[i] == 0)
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break;
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obj = drm_mode_object_find(connector->dev,
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connector->encoder_ids[i],
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DRM_MODE_OBJECT_ENCODER);
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if (obj) {
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struct drm_encoder *encoder = obj_to_encoder(obj);
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struct omap_overlay_manager *mgr =
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omap_encoder_get_manager(encoder);
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DBG("%s: found %s", omap_connector->dssdev->name,
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mgr->name);
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return encoder;
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}
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}
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DBG("%s: no encoder", omap_connector->dssdev->name);
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return NULL;
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}
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static const struct drm_connector_funcs omap_connector_funcs = {
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.dpms = omap_connector_dpms,
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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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};
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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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.best_encoder = omap_connector_attached_encoder,
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};
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/* called from encoder when mode is set, to propagate settings to the dssdev */
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void omap_connector_mode_set(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct drm_device *dev = connector->dev;
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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 omap_video_timings timings;
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copy_timings_drm_to_omap(&timings, mode);
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DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
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omap_connector->dssdev->name,
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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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if (dssdrv->check_timings(dssdev, &timings)) {
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dev_err(dev->dev, "could not set timings\n");
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return;
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}
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dssdrv->set_timings(dssdev, &timings);
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}
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/* flush an area of the framebuffer (in case of manual update display that
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* is not automatically flushed)
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*/
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void omap_connector_flush(struct drm_connector *connector,
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int x, int y, int w, int h)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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/* TODO: enable when supported in dss */
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VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
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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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{
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struct drm_connector *connector = NULL;
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struct omap_connector *omap_connector;
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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(struct omap_connector), GFP_KERNEL);
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if (!omap_connector) {
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dev_err(dev->dev, "could not allocate connector\n");
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goto fail;
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}
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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 0 /* enable when dss2 supports hotplug */
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if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
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connector->polled = 0;
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else
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#endif
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connector->polled = DRM_CONNECTOR_POLL_CONNECT |
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DRM_CONNECTOR_POLL_DISCONNECT;
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connector->interlace_allowed = 1;
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connector->doublescan_allowed = 0;
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drm_sysfs_connector_add(connector);
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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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}
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return NULL;
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}
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