blob: 3b92b84b95607086f856d0c8314dfb8d8a883b0b [file] [log] [blame]
/*
* 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);