diff options
Diffstat (limited to 'drivers/video/omap2/dss/display.c')
| -rw-r--r-- | drivers/video/omap2/dss/display.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c new file mode 100644 index 00000000..0aa8ad8f --- /dev/null +++ b/drivers/video/omap2/dss/display.c @@ -0,0 +1,221 @@ +/* + * 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 <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: + 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); + +static int dss_suspend_device(struct device *dev, void *data) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) { + dssdev->activate_after_resume = false; + return 0; + } + + dssdev->driver->disable(dssdev); + + dssdev->activate_after_resume = true; + + return 0; +} + +int dss_suspend_all_devices(void) +{ + int r; + struct bus_type *bus = dss_get_bus(); + + r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device); + if (r) { + /* resume all displays that were suspended */ + dss_resume_all_devices(); + return r; + } + + return 0; +} + +static int dss_resume_device(struct device *dev, void *data) +{ + int r; + struct omap_dss_device *dssdev = to_dss_device(dev); + + if (dssdev->activate_after_resume) { + r = dssdev->driver->enable(dssdev); + if (r) + return r; + } + + dssdev->activate_after_resume = false; + + return 0; +} + +int dss_resume_all_devices(void) +{ + struct bus_type *bus = dss_get_bus(); + + return bus_for_each_dev(bus, NULL, NULL, dss_resume_device); +} + +static int dss_disable_device(struct device *dev, void *data) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + + if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) + dssdev->driver->disable(dssdev); + + return 0; +} + +void dss_disable_all_devices(void) +{ + struct bus_type *bus = dss_get_bus(); + bus_for_each_dev(bus, NULL, NULL, dss_disable_device); +} + + +void omap_dss_get_device(struct omap_dss_device *dssdev) +{ + get_device(&dssdev->dev); +} +EXPORT_SYMBOL(omap_dss_get_device); + +void omap_dss_put_device(struct omap_dss_device *dssdev) +{ + put_device(&dssdev->dev); +} +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 device *dev; + struct device *dev_start = NULL; + struct omap_dss_device *dssdev = NULL; + + int match(struct device *dev, void *data) + { + return 1; + } + + if (from) + dev_start = &from->dev; + dev = bus_find_device(dss_get_bus(), dev_start, NULL, match); + if (dev) + dssdev = to_dss_device(dev); + if (from) + put_device(&from->dev); + + 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); + +int omap_dss_start_device(struct omap_dss_device *dssdev) +{ + if (!dssdev->driver) { + DSSDBG("no driver\n"); + return -ENODEV; + } + + if (!try_module_get(dssdev->dev.driver->owner)) { + return -ENODEV; + } + + return 0; +} +EXPORT_SYMBOL(omap_dss_start_device); + +void omap_dss_stop_device(struct omap_dss_device *dssdev) +{ + module_put(dssdev->dev.driver->owner); +} +EXPORT_SYMBOL(omap_dss_stop_device); + |