mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 00:52:01 +00:00
OMAP: DSS2: SDI driver
SDI (Serial Display Interface) implements TI Flatlink 3G display interface. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Tomi Valkeinen
parent
5c18adb373
commit
23c0a7a6e8
277
drivers/video/omap2/dss/sdi.c
Normal file
277
drivers/video/omap2/dss/sdi.c
Normal file
@ -0,0 +1,277 @@
|
||||
/*
|
||||
* linux/drivers/video/omap2/dss/sdi.c
|
||||
*
|
||||
* Copyright (C) 2009 Nokia Corporation
|
||||
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
|
||||
*
|
||||
* 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 "SDI"
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/err.h>
|
||||
|
||||
#include <plat/display.h>
|
||||
#include "dss.h"
|
||||
|
||||
static struct {
|
||||
bool skip_init;
|
||||
bool update_enabled;
|
||||
} sdi;
|
||||
|
||||
static void sdi_basic_init(void)
|
||||
{
|
||||
dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_BYPASS);
|
||||
|
||||
dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT);
|
||||
dispc_set_tft_data_lines(24);
|
||||
dispc_lcd_enable_signal_polarity(1);
|
||||
}
|
||||
|
||||
static int sdi_display_enable(struct omap_dss_device *dssdev)
|
||||
{
|
||||
struct omap_video_timings *t = &dssdev->panel.timings;
|
||||
struct dss_clock_info dss_cinfo;
|
||||
struct dispc_clock_info dispc_cinfo;
|
||||
u16 lck_div, pck_div;
|
||||
unsigned long fck;
|
||||
unsigned long pck;
|
||||
int r;
|
||||
|
||||
r = omap_dss_start_device(dssdev);
|
||||
if (r) {
|
||||
DSSERR("failed to start device\n");
|
||||
goto err0;
|
||||
}
|
||||
|
||||
if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
|
||||
DSSERR("dssdev already enabled\n");
|
||||
r = -EINVAL;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
/* In case of skip_init sdi_init has already enabled the clocks */
|
||||
if (!sdi.skip_init)
|
||||
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
sdi_basic_init();
|
||||
|
||||
/* 15.5.9.1.2 */
|
||||
dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF;
|
||||
|
||||
dispc_set_pol_freq(dssdev->panel.config, dssdev->panel.acbi,
|
||||
dssdev->panel.acb);
|
||||
|
||||
if (!sdi.skip_init) {
|
||||
r = dss_calc_clock_div(1, t->pixel_clock * 1000,
|
||||
&dss_cinfo, &dispc_cinfo);
|
||||
} else {
|
||||
r = dss_get_clock_div(&dss_cinfo);
|
||||
r = dispc_get_clock_div(&dispc_cinfo);
|
||||
}
|
||||
|
||||
if (r)
|
||||
goto err2;
|
||||
|
||||
fck = dss_cinfo.fck;
|
||||
lck_div = dispc_cinfo.lck_div;
|
||||
pck_div = dispc_cinfo.pck_div;
|
||||
|
||||
pck = fck / lck_div / pck_div / 1000;
|
||||
|
||||
if (pck != t->pixel_clock) {
|
||||
DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
|
||||
"got %lu kHz\n",
|
||||
t->pixel_clock, pck);
|
||||
|
||||
t->pixel_clock = pck;
|
||||
}
|
||||
|
||||
|
||||
dispc_set_lcd_timings(t);
|
||||
|
||||
r = dss_set_clock_div(&dss_cinfo);
|
||||
if (r)
|
||||
goto err2;
|
||||
|
||||
r = dispc_set_clock_div(&dispc_cinfo);
|
||||
if (r)
|
||||
goto err2;
|
||||
|
||||
if (!sdi.skip_init) {
|
||||
dss_sdi_init(dssdev->phy.sdi.datapairs);
|
||||
r = dss_sdi_enable();
|
||||
if (r)
|
||||
goto err1;
|
||||
mdelay(2);
|
||||
}
|
||||
|
||||
dispc_enable_lcd_out(1);
|
||||
|
||||
if (dssdev->driver->enable) {
|
||||
r = dssdev->driver->enable(dssdev);
|
||||
if (r)
|
||||
goto err3;
|
||||
}
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
||||
|
||||
sdi.skip_init = 0;
|
||||
|
||||
return 0;
|
||||
err3:
|
||||
dispc_enable_lcd_out(0);
|
||||
err2:
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
err1:
|
||||
omap_dss_stop_device(dssdev);
|
||||
err0:
|
||||
return r;
|
||||
}
|
||||
|
||||
static int sdi_display_resume(struct omap_dss_device *dssdev);
|
||||
|
||||
static void sdi_display_disable(struct omap_dss_device *dssdev)
|
||||
{
|
||||
if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED)
|
||||
return;
|
||||
|
||||
if (dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED)
|
||||
if (sdi_display_resume(dssdev))
|
||||
return;
|
||||
|
||||
if (dssdev->driver->disable)
|
||||
dssdev->driver->disable(dssdev);
|
||||
|
||||
dispc_enable_lcd_out(0);
|
||||
|
||||
dss_sdi_disable();
|
||||
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
|
||||
|
||||
omap_dss_stop_device(dssdev);
|
||||
}
|
||||
|
||||
static int sdi_display_suspend(struct omap_dss_device *dssdev)
|
||||
{
|
||||
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
|
||||
return -EINVAL;
|
||||
|
||||
if (dssdev->driver->suspend)
|
||||
dssdev->driver->suspend(dssdev);
|
||||
|
||||
dispc_enable_lcd_out(0);
|
||||
|
||||
dss_sdi_disable();
|
||||
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sdi_display_resume(struct omap_dss_device *dssdev)
|
||||
{
|
||||
int r;
|
||||
|
||||
if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED)
|
||||
return -EINVAL;
|
||||
|
||||
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
r = dss_sdi_enable();
|
||||
if (r)
|
||||
goto err;
|
||||
mdelay(2);
|
||||
|
||||
dispc_enable_lcd_out(1);
|
||||
|
||||
if (dssdev->driver->resume)
|
||||
dssdev->driver->resume(dssdev);
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
||||
|
||||
return 0;
|
||||
err:
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int sdi_display_set_update_mode(struct omap_dss_device *dssdev,
|
||||
enum omap_dss_update_mode mode)
|
||||
{
|
||||
if (mode == OMAP_DSS_UPDATE_MANUAL)
|
||||
return -EINVAL;
|
||||
|
||||
if (mode == OMAP_DSS_UPDATE_DISABLED) {
|
||||
dispc_enable_lcd_out(0);
|
||||
sdi.update_enabled = 0;
|
||||
} else {
|
||||
dispc_enable_lcd_out(1);
|
||||
sdi.update_enabled = 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static enum omap_dss_update_mode sdi_display_get_update_mode(
|
||||
struct omap_dss_device *dssdev)
|
||||
{
|
||||
return sdi.update_enabled ? OMAP_DSS_UPDATE_AUTO :
|
||||
OMAP_DSS_UPDATE_DISABLED;
|
||||
}
|
||||
|
||||
static void sdi_get_timings(struct omap_dss_device *dssdev,
|
||||
struct omap_video_timings *timings)
|
||||
{
|
||||
*timings = dssdev->panel.timings;
|
||||
}
|
||||
|
||||
int sdi_init_display(struct omap_dss_device *dssdev)
|
||||
{
|
||||
DSSDBG("SDI init\n");
|
||||
|
||||
dssdev->enable = sdi_display_enable;
|
||||
dssdev->disable = sdi_display_disable;
|
||||
dssdev->suspend = sdi_display_suspend;
|
||||
dssdev->resume = sdi_display_resume;
|
||||
dssdev->set_update_mode = sdi_display_set_update_mode;
|
||||
dssdev->get_update_mode = sdi_display_get_update_mode;
|
||||
dssdev->get_timings = sdi_get_timings;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sdi_init(bool skip_init)
|
||||
{
|
||||
/* we store this for first display enable, then clear it */
|
||||
sdi.skip_init = skip_init;
|
||||
|
||||
/*
|
||||
* Enable clocks already here, otherwise there would be a toggle
|
||||
* of them until sdi_display_enable is called.
|
||||
*/
|
||||
if (skip_init)
|
||||
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void sdi_exit(void)
|
||||
{
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user