1 files changed, 338 insertions, 0 deletions

diff --git a/drivers/video/fbdev/omap2/dss/display.c b/drivers/video/fbdev/omap2/dss/display.c
new file mode 100644
index 000000000000..2412a0dd0c13
--- /dev/null
+++ b/drivers/video/fbdev/omap2/dss/display.c
@@ -0,0 +1,338 @@
+/*
+ * linux/drivers/video/omap2/dss/display.c
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+ *
+ * Some code and ideas taken from drivers/video/omap/ driver
+ * by Imre Deak.
+ *
+ * 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/>.
+ */
+
+#define DSS_SUBSYS_NAME "DISPLAY"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+
+#include <video/omapdss.h>
+#include "dss.h"
+#include "dss_features.h"
+
+void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
+                        u16 *xres, u16 *yres)
+{
+        *xres = dssdev->panel.timings.x_res;
+        *yres = dssdev->panel.timings.y_res;
+}
+EXPORT_SYMBOL(omapdss_default_get_resolution);
+
+int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
+{
+        switch (dssdev->type) {
+        case OMAP_DISPLAY_TYPE_DPI:
+                if (dssdev->phy.dpi.data_lines == 24)
+                        return 24;
+                else
+                        return 16;
+
+        case OMAP_DISPLAY_TYPE_DBI:
+                if (dssdev->ctrl.pixel_size == 24)
+                        return 24;
+                else
+                        return 16;
+        case OMAP_DISPLAY_TYPE_DSI:
+                if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16)
+                        return 24;
+                else
+                        return 16;
+        case OMAP_DISPLAY_TYPE_VENC:
+        case OMAP_DISPLAY_TYPE_SDI:
+        case OMAP_DISPLAY_TYPE_HDMI:
+        case OMAP_DISPLAY_TYPE_DVI:
+                return 24;
+        default:
+                BUG();
+                return 0;
+        }
+}
+EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
+
+void omapdss_default_get_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        *timings = dssdev->panel.timings;
+}
+EXPORT_SYMBOL(omapdss_default_get_timings);
+
+int dss_suspend_all_devices(void)
+{
+        struct omap_dss_device *dssdev = NULL;
+
+        for_each_dss_dev(dssdev) {
+                if (!dssdev->driver)
+                        continue;
+
+                if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
+                        dssdev->driver->disable(dssdev);
+                        dssdev->activate_after_resume = true;
+                } else {
+                        dssdev->activate_after_resume = false;
+                }
+        }
+
+        return 0;
+}
+
+int dss_resume_all_devices(void)
+{
+        struct omap_dss_device *dssdev = NULL;
+
+        for_each_dss_dev(dssdev) {
+                if (!dssdev->driver)
+                        continue;
+
+                if (dssdev->activate_after_resume) {
+                        dssdev->driver->enable(dssdev);
+                        dssdev->activate_after_resume = false;
+                }
+        }
+
+        return 0;
+}
+
+void dss_disable_all_devices(void)
+{
+        struct omap_dss_device *dssdev = NULL;
+
+        for_each_dss_dev(dssdev) {
+                if (!dssdev->driver)
+                        continue;
+
+                if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                        dssdev->driver->disable(dssdev);
+        }
+}
+
+static LIST_HEAD(panel_list);
+static DEFINE_MUTEX(panel_list_mutex);
+static int disp_num_counter;
+
+int omapdss_register_display(struct omap_dss_device *dssdev)
+{
+        struct omap_dss_driver *drv = dssdev->driver;
+        int id;
+
+        /*
+         * Note: this presumes all the displays are either using DT or non-DT,
+         * which normally should be the case. This also presumes that all
+         * displays either have an DT alias, or none has.
+         */
+
+        if (dssdev->dev->of_node) {
+                id = of_alias_get_id(dssdev->dev->of_node, "display");
+
+                if (id < 0)
+                        id = disp_num_counter++;
+        } else {
+                id = disp_num_counter++;
+        }
+
+        snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);
+
+        /* Use 'label' property for name, if it exists */
+        if (dssdev->dev->of_node)
+                of_property_read_string(dssdev->dev->of_node, "label",
+                        &dssdev->name);
+
+        if (dssdev->name == NULL)
+                dssdev->name = dssdev->alias;
+
+        if (drv && drv->get_resolution == NULL)
+                drv->get_resolution = omapdss_default_get_resolution;
+        if (drv && drv->get_recommended_bpp == NULL)
+                drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
+        if (drv && drv->get_timings == NULL)
+                drv->get_timings = omapdss_default_get_timings;
+
+        mutex_lock(&panel_list_mutex);
+        list_add_tail(&dssdev->panel_list, &panel_list);
+        mutex_unlock(&panel_list_mutex);
+        return 0;
+}
+EXPORT_SYMBOL(omapdss_register_display);
+
+void omapdss_unregister_display(struct omap_dss_device *dssdev)
+{
+        mutex_lock(&panel_list_mutex);
+        list_del(&dssdev->panel_list);
+        mutex_unlock(&panel_list_mutex);
+}
+EXPORT_SYMBOL(omapdss_unregister_display);
+
+struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
+{
+        if (!try_module_get(dssdev->owner))
+                return NULL;
+
+        if (get_device(dssdev->dev) == NULL) {
+                module_put(dssdev->owner);
+                return NULL;
+        }
+
+        return dssdev;
+}
+EXPORT_SYMBOL(omap_dss_get_device);
+
+void omap_dss_put_device(struct omap_dss_device *dssdev)
+{
+        put_device(dssdev->dev);
+        module_put(dssdev->owner);
+}
+EXPORT_SYMBOL(omap_dss_put_device);
+
+/*
+ * ref count of the found device is incremented.
+ * ref count of from-device is decremented.
+ */
+struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
+{
+        struct list_head *l;
+        struct omap_dss_device *dssdev;
+
+        mutex_lock(&panel_list_mutex);
+
+        if (list_empty(&panel_list)) {
+                dssdev = NULL;
+                goto out;
+        }
+
+        if (from == NULL) {
+                dssdev = list_first_entry(&panel_list, struct omap_dss_device,
+                                panel_list);
+                omap_dss_get_device(dssdev);
+                goto out;
+        }
+
+        omap_dss_put_device(from);
+
+        list_for_each(l, &panel_list) {
+                dssdev = list_entry(l, struct omap_dss_device, panel_list);
+                if (dssdev == from) {
+                        if (list_is_last(l, &panel_list)) {
+                                dssdev = NULL;
+                                goto out;
+                        }
+
+                        dssdev = list_entry(l->next, struct omap_dss_device,
+                                        panel_list);
+                        omap_dss_get_device(dssdev);
+                        goto out;
+                }
+        }
+
+        WARN(1, "'from' dssdev not found\n");
+
+        dssdev = NULL;
+out:
+        mutex_unlock(&panel_list_mutex);
+        return dssdev;
+}
+EXPORT_SYMBOL(omap_dss_get_next_device);
+
+struct omap_dss_device *omap_dss_find_device(void *data,
+                int (*match)(struct omap_dss_device *dssdev, void *data))
+{
+        struct omap_dss_device *dssdev = NULL;
+
+        while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
+                if (match(dssdev, data))
+                        return dssdev;
+        }
+
+        return NULL;
+}
+EXPORT_SYMBOL(omap_dss_find_device);
+
+void videomode_to_omap_video_timings(const struct videomode *vm,
+                struct omap_video_timings *ovt)
+{
+        memset(ovt, 0, sizeof(*ovt));
+
+        ovt->pixelclock = vm->pixelclock;
+        ovt->x_res = vm->hactive;
+        ovt->hbp = vm->hback_porch;
+        ovt->hfp = vm->hfront_porch;
+        ovt->hsw = vm->hsync_len;
+        ovt->y_res = vm->vactive;
+        ovt->vbp = vm->vback_porch;
+        ovt->vfp = vm->vfront_porch;
+        ovt->vsw = vm->vsync_len;
+
+        ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
+                OMAPDSS_SIG_ACTIVE_HIGH :
+                OMAPDSS_SIG_ACTIVE_LOW;
+        ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
+                OMAPDSS_SIG_ACTIVE_HIGH :
+                OMAPDSS_SIG_ACTIVE_LOW;
+        ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
+                OMAPDSS_SIG_ACTIVE_HIGH :
+                OMAPDSS_SIG_ACTIVE_LOW;
+        ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
+                OMAPDSS_DRIVE_SIG_RISING_EDGE :
+                OMAPDSS_DRIVE_SIG_FALLING_EDGE;
+
+        ovt->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
+}
+EXPORT_SYMBOL(videomode_to_omap_video_timings);
+
+void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
+                struct videomode *vm)
+{
+        memset(vm, 0, sizeof(*vm));
+
+        vm->pixelclock = ovt->pixelclock;
+
+        vm->hactive = ovt->x_res;
+        vm->hback_porch = ovt->hbp;
+        vm->hfront_porch = ovt->hfp;
+        vm->hsync_len = ovt->hsw;
+        vm->vactive = ovt->y_res;
+        vm->vback_porch = ovt->vbp;
+        vm->vfront_porch = ovt->vfp;
+        vm->vsync_len = ovt->vsw;
+
+        if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
+                vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
+        else
+                vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
+
+        if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
+                vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
+        else
+                vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
+
+        if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
+                vm->flags |= DISPLAY_FLAGS_DE_HIGH;
+        else
+                vm->flags |= DISPLAY_FLAGS_DE_LOW;
+
+        if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
+                vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
+        else
+                vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+}
+EXPORT_SYMBOL(omap_video_timings_to_videomode);