diff options
Diffstat (limited to 'drivers/video/omap2/dss/display.c')
| -rw-r--r-- | drivers/video/omap2/dss/display.c | 671 |
1 files changed, 671 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c new file mode 100644 index 000000000000..3b92b84b9560 --- /dev/null +++ b/drivers/video/omap2/dss/display.c @@ -0,0 +1,671 @@ +/* + * 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/list.h> +#include <linux/platform_device.h> + +#include <plat/display.h> +#include "dss.h" + +static LIST_HEAD(display_list); + +static ssize_t display_enabled_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED; + + return snprintf(buf, PAGE_SIZE, "%d\n", enabled); +} + +static ssize_t display_enabled_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + bool enabled, r; + + enabled = simple_strtoul(buf, NULL, 10); + + if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) { + if (enabled) { + r = dssdev->enable(dssdev); + if (r) + return r; + } else { + dssdev->disable(dssdev); + } + } + + return size; +} + +static ssize_t display_upd_mode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + enum omap_dss_update_mode mode = OMAP_DSS_UPDATE_AUTO; + if (dssdev->get_update_mode) + mode = dssdev->get_update_mode(dssdev); + return snprintf(buf, PAGE_SIZE, "%d\n", mode); +} + +static ssize_t display_upd_mode_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + int val, r; + enum omap_dss_update_mode mode; + + val = simple_strtoul(buf, NULL, 10); + + switch (val) { + case OMAP_DSS_UPDATE_DISABLED: + case OMAP_DSS_UPDATE_AUTO: + case OMAP_DSS_UPDATE_MANUAL: + mode = (enum omap_dss_update_mode)val; + break; + default: + return -EINVAL; + } + + r = dssdev->set_update_mode(dssdev, mode); + if (r) + return r; + + return size; +} + +static ssize_t display_tear_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + return snprintf(buf, PAGE_SIZE, "%d\n", + dssdev->get_te ? dssdev->get_te(dssdev) : 0); +} + +static ssize_t display_tear_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + unsigned long te; + int r; + + if (!dssdev->enable_te || !dssdev->get_te) + return -ENOENT; + + te = simple_strtoul(buf, NULL, 0); + + r = dssdev->enable_te(dssdev, te); + if (r) + return r; + + return size; +} + +static ssize_t display_timings_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + struct omap_video_timings t; + + if (!dssdev->get_timings) + return -ENOENT; + + dssdev->get_timings(dssdev, &t); + + return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n", + t.pixel_clock, + t.x_res, t.hfp, t.hbp, t.hsw, + t.y_res, t.vfp, t.vbp, t.vsw); +} + +static ssize_t display_timings_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + struct omap_video_timings t; + int r, found; + + if (!dssdev->set_timings || !dssdev->check_timings) + return -ENOENT; + + found = 0; +#ifdef CONFIG_OMAP2_DSS_VENC + if (strncmp("pal", buf, 3) == 0) { + t = omap_dss_pal_timings; + found = 1; + } else if (strncmp("ntsc", buf, 4) == 0) { + t = omap_dss_ntsc_timings; + found = 1; + } +#endif + if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu", + &t.pixel_clock, + &t.x_res, &t.hfp, &t.hbp, &t.hsw, + &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9) + return -EINVAL; + + r = dssdev->check_timings(dssdev, &t); + if (r) + return r; + + dssdev->set_timings(dssdev, &t); + + return size; +} + +static ssize_t display_rotate_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + int rotate; + if (!dssdev->get_rotate) + return -ENOENT; + rotate = dssdev->get_rotate(dssdev); + return snprintf(buf, PAGE_SIZE, "%u\n", rotate); +} + +static ssize_t display_rotate_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + unsigned long rot; + int r; + + if (!dssdev->set_rotate || !dssdev->get_rotate) + return -ENOENT; + + rot = simple_strtoul(buf, NULL, 0); + + r = dssdev->set_rotate(dssdev, rot); + if (r) + return r; + + return size; +} + +static ssize_t display_mirror_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + int mirror; + if (!dssdev->get_mirror) + return -ENOENT; + mirror = dssdev->get_mirror(dssdev); + return snprintf(buf, PAGE_SIZE, "%u\n", mirror); +} + +static ssize_t display_mirror_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + unsigned long mirror; + int r; + + if (!dssdev->set_mirror || !dssdev->get_mirror) + return -ENOENT; + + mirror = simple_strtoul(buf, NULL, 0); + + r = dssdev->set_mirror(dssdev, mirror); + if (r) + return r; + + return size; +} + +static ssize_t display_wss_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + unsigned int wss; + + if (!dssdev->get_wss) + return -ENOENT; + + wss = dssdev->get_wss(dssdev); + + return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss); +} + +static ssize_t display_wss_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + unsigned long wss; + int r; + + if (!dssdev->get_wss || !dssdev->set_wss) + return -ENOENT; + + if (strict_strtoul(buf, 0, &wss)) + return -EINVAL; + + if (wss > 0xfffff) + return -EINVAL; + + r = dssdev->set_wss(dssdev, wss); + if (r) + return r; + + return size; +} + +static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR, + display_enabled_show, display_enabled_store); +static DEVICE_ATTR(update_mode, S_IRUGO|S_IWUSR, + display_upd_mode_show, display_upd_mode_store); +static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR, + display_tear_show, display_tear_store); +static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR, + display_timings_show, display_timings_store); +static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR, + display_rotate_show, display_rotate_store); +static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR, + display_mirror_show, display_mirror_store); +static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR, + display_wss_show, display_wss_store); + +static struct device_attribute *display_sysfs_attrs[] = { + &dev_attr_enabled, + &dev_attr_update_mode, + &dev_attr_tear_elim, + &dev_attr_timings, + &dev_attr_rotate, + &dev_attr_mirror, + &dev_attr_wss, + NULL +}; + +static void default_get_resolution(struct omap_dss_device *dssdev, + u16 *xres, u16 *yres) +{ + *xres = dssdev->panel.timings.x_res; + *yres = dssdev->panel.timings.y_res; +} + +void default_get_overlay_fifo_thresholds(enum omap_plane plane, + u32 fifo_size, enum omap_burst_size *burst_size, + u32 *fifo_low, u32 *fifo_high) +{ + unsigned burst_size_bytes; + + *burst_size = OMAP_DSS_BURST_16x32; + burst_size_bytes = 16 * 32 / 8; + + *fifo_high = fifo_size - 1; + *fifo_low = fifo_size - burst_size_bytes; +} + +static int default_wait_vsync(struct omap_dss_device *dssdev) +{ + unsigned long timeout = msecs_to_jiffies(500); + u32 irq; + + if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) + irq = DISPC_IRQ_EVSYNC_ODD; + else + irq = DISPC_IRQ_VSYNC; + + return omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout); +} + +static int default_get_recommended_bpp(struct omap_dss_device *dssdev) +{ + if (dssdev->panel.recommended_bpp) + return dssdev->panel.recommended_bpp; + + 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: + case OMAP_DISPLAY_TYPE_DSI: + if (dssdev->ctrl.pixel_size == 24) + return 24; + else + return 16; + case OMAP_DISPLAY_TYPE_VENC: + case OMAP_DISPLAY_TYPE_SDI: + return 24; + return 24; + default: + BUG(); + } +} + +/* Checks if replication logic should be used. Only use for active matrix, + * when overlay is in RGB12U or RGB16 mode, and LCD interface is + * 18bpp or 24bpp */ +bool dss_use_replication(struct omap_dss_device *dssdev, + enum omap_color_mode mode) +{ + int bpp; + + if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16) + return false; + + if (dssdev->type == OMAP_DISPLAY_TYPE_DPI && + (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0) + return false; + + switch (dssdev->type) { + case OMAP_DISPLAY_TYPE_DPI: + bpp = dssdev->phy.dpi.data_lines; + break; + case OMAP_DISPLAY_TYPE_VENC: + case OMAP_DISPLAY_TYPE_SDI: + bpp = 24; + break; + case OMAP_DISPLAY_TYPE_DBI: + case OMAP_DISPLAY_TYPE_DSI: + bpp = dssdev->ctrl.pixel_size; + break; + default: + BUG(); + } + + return bpp > 16; +} + +void dss_init_device(struct platform_device *pdev, + struct omap_dss_device *dssdev) +{ + struct device_attribute *attr; + int i; + int r; + + switch (dssdev->type) { + case OMAP_DISPLAY_TYPE_DPI: +#ifdef CONFIG_OMAP2_DSS_RFBI + case OMAP_DISPLAY_TYPE_DBI: +#endif +#ifdef CONFIG_OMAP2_DSS_SDI + case OMAP_DISPLAY_TYPE_SDI: +#endif +#ifdef CONFIG_OMAP2_DSS_DSI + case OMAP_DISPLAY_TYPE_DSI: +#endif +#ifdef CONFIG_OMAP2_DSS_VENC + case OMAP_DISPLAY_TYPE_VENC: +#endif + break; + default: + DSSERR("Support for display '%s' not compiled in.\n", + dssdev->name); + return; + } + + dssdev->get_resolution = default_get_resolution; + dssdev->get_recommended_bpp = default_get_recommended_bpp; + dssdev->wait_vsync = default_wait_vsync; + + switch (dssdev->type) { + case OMAP_DISPLAY_TYPE_DPI: + r = dpi_init_display(dssdev); + break; +#ifdef CONFIG_OMAP2_DSS_RFBI + case OMAP_DISPLAY_TYPE_DBI: + r = rfbi_init_display(dssdev); + break; +#endif +#ifdef CONFIG_OMAP2_DSS_VENC + case OMAP_DISPLAY_TYPE_VENC: + r = venc_init_display(dssdev); + break; +#endif +#ifdef CONFIG_OMAP2_DSS_SDI + case OMAP_DISPLAY_TYPE_SDI: + r = sdi_init_display(dssdev); + break; +#endif +#ifdef CONFIG_OMAP2_DSS_DSI + case OMAP_DISPLAY_TYPE_DSI: + r = dsi_init_display(dssdev); + break; +#endif + default: + BUG(); + } + + if (r) { + DSSERR("failed to init display %s\n", dssdev->name); + return; + } + + /* create device sysfs files */ + i = 0; + while ((attr = display_sysfs_attrs[i++]) != NULL) { + r = device_create_file(&dssdev->dev, attr); + if (r) + DSSERR("failed to create sysfs file\n"); + } + + /* create display? sysfs links */ + r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj, + dev_name(&dssdev->dev)); + if (r) + DSSERR("failed to create sysfs display link\n"); +} + +void dss_uninit_device(struct platform_device *pdev, + struct omap_dss_device *dssdev) +{ + struct device_attribute *attr; + int i = 0; + + sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev)); + + while ((attr = display_sysfs_attrs[i++]) != NULL) + device_remove_file(&dssdev->dev, attr); + + if (dssdev->manager) + dssdev->manager->unset_device(dssdev->manager); +} + +static int dss_suspend_device(struct device *dev, void *data) +{ + int r; + struct omap_dss_device *dssdev = to_dss_device(dev); + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) { + dssdev->activate_after_resume = false; + return 0; + } + + if (!dssdev->suspend) { + DSSERR("display '%s' doesn't implement suspend\n", + dssdev->name); + return -ENOSYS; + } + + r = dssdev->suspend(dssdev); + if (r) + return r; + + 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 && dssdev->resume) { + r = dssdev->resume(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); + dssdev->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) + { + /* skip panels connected to controllers */ + if (to_dss_device(dev)->panel.ctrl) + return 0; + + 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) +{ + int r; + + if (!dssdev->driver) { + DSSDBG("no driver\n"); + r = -ENODEV; + goto err0; + } + + if (dssdev->ctrl.panel && !dssdev->ctrl.panel->driver) { + DSSDBG("no panel driver\n"); + r = -ENODEV; + goto err0; + } + + if (!try_module_get(dssdev->dev.driver->owner)) { + r = -ENODEV; + goto err0; + } + + if (dssdev->ctrl.panel) { + if (!try_module_get(dssdev->ctrl.panel->dev.driver->owner)) { + r = -ENODEV; + goto err1; + } + } + + return 0; +err1: + module_put(dssdev->dev.driver->owner); +err0: + return r; +} +EXPORT_SYMBOL(omap_dss_start_device); + +void omap_dss_stop_device(struct omap_dss_device *dssdev) +{ + if (dssdev->ctrl.panel) + module_put(dssdev->ctrl.panel->dev.driver->owner); + + module_put(dssdev->dev.driver->owner); +} +EXPORT_SYMBOL(omap_dss_stop_device); + |