static int dpi_set_dispc_clk(struct omap_dss_device *dssdev, bool is_tft,
unsigned long pck_req, unsigned long *fck, int *lck_div,
int *pck_div)
{
struct dss_clock_info dss_cinfo;
struct dispc_clock_info dispc_cinfo;
int r;
r = dss_calc_clock_div(is_tft, pck_req, &dss_cinfo, &dispc_cinfo);
if (r)
return r;
r = dss_set_clock_div(&dss_cinfo);
if (r)
return r;
r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
if (r)
return r;
*fck = dss_cinfo.fck;
*lck_div = dispc_cinfo.lck_div;
*pck_div = dispc_cinfo.pck_div;
return 0;
}
static int dpi_set_dispc_clk(int lcd_channel_ix,
bool is_tft, unsigned long pck_req,
unsigned long *fck, int *lck_div, int *pck_div)
{
struct dss_clock_info dss_cinfo;
struct dispc_clock_info dispc_cinfo;
int r;
if (cpu_is_omap44xx()) {
printk(KERN_INFO "dpi set dispc clk");
/*OMAP4: check this later?*/
return 0;
}
r = dss_calc_clock_div(is_tft, pck_req, &dss_cinfo, &dispc_cinfo);
if (r)
return r;
r = dss_set_clock_div(&dss_cinfo);
if (r)
return r;
r = dispc_set_clock_div(lcd_channel_ix, &dispc_cinfo);
if (r)
return r;
*fck = dss_cinfo.fck;
*lck_div = dispc_cinfo.lck_div;
*pck_div = dispc_cinfo.pck_div;
return 0;
}
static int dpi_set_dispc_clk(unsigned long pck_req, unsigned long *fck,
int *lck_div, int *pck_div)
{
struct dpi_clk_calc_ctx ctx;
int r;
bool ok;
ok = dpi_dss_clk_calc(pck_req, &ctx);
if (!ok)
return -EINVAL;
r = dss_set_clock_div(&ctx.dss_cinfo);
if (r)
return r;
dpi.mgr_config.clock_info = ctx.dispc_cinfo;
*fck = ctx.dss_cinfo.fck;
*lck_div = ctx.dispc_cinfo.lck_div;
*pck_div = ctx.dispc_cinfo.pck_div;
return 0;
}
/*
* linux/drivers/video/omap2/dss/dpi.c
*
* Copyright (C) 2009 Nokia Corporation
* Author: Tomi Valkeinen <*****@*****.**>
*
* 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 "DPI"
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <plat/display.h>
#include <plat/cpu.h>
#include <plat/omap-pm.h>
#include "dss.h"
static struct {
struct regulator *vdds_dsi_reg;
} dpi;
#ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
static int dpi_set_dsi_clk(enum omap_channel channel, bool is_tft,
unsigned long pck_req, unsigned long *pck)
{
struct dsi_clock_info dsi_cinfo;
struct dispc_clock_info dispc_cinfo;
int r;
enum omap_dsi_index ix;
DSSDBG("DPI clk source is DSI PLL\n");
ix = (channel == OMAP_DSS_CHANNEL_LCD) ? DSI1 : DSI2;
if (!cpu_is_omap44xx()) {
r = dsi_pll_calc_clock_div_pck(ix, is_tft,
pck_req, &dsi_cinfo, &dispc_cinfo);
if (r)
return r;
} else {
dsi_cinfo.regn = 16;
dsi_cinfo.regm = 115;
dsi_cinfo.regm_dispc = 3;
dsi_cinfo.regm_dsi = 3;
dsi_cinfo.use_dss2_fck = true;
r = dsi_calc_clock_rates(channel, &dsi_cinfo);
DSSDBG("dpi_set_dsi_clk: dsi_calc_clock_rates=%d\n", r);
if (r)
return r;
dispc_find_clk_divs(is_tft, pck_req,
dsi_cinfo.dsi_pll_dispc_fclk, &dispc_cinfo);
}
r = dsi_pll_set_clock_div(ix, &dsi_cinfo);
DSSDBG("dpi_set_dsi_clk: dsi_pll_set_clock_div=%d\n", r);
if (r)
return r;
if (cpu_is_omap44xx()){
dss_select_dispc_clk_source(ix, (ix == DSI1) ?
DSS_SRC_PLL1_CLK1 : DSS_SRC_PLL2_CLK1);
dss_select_lcd_clk_source(ix, (ix == DSI1) ?
DSS_SRC_PLL1_CLK1 : DSS_SRC_PLL2_CLK1);
}else{
dss_select_dispc_clk_source(ix, DSS_SRC_DSI1_PLL_FCLK);
}
dispc_set_clock_div(channel, &dispc_cinfo);
*pck = dispc_cinfo.pck;
return 0;
}
#else /* #ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL */
static int dpi_set_dispc_clk(enum omap_channel channel,
bool is_tft, unsigned long pck_req, unsigned long *pck)
{
struct dispc_clock_info dispc_cinfo;
enum omap_dsi_index ix;
DSSDBG("DPI clk source is DISPC\n");
ix = (channel == OMAP_DSS_CHANNEL_LCD) ? DSI1 : DSI2;
if (cpu_is_omap44xx())
dispc_find_clk_divs(is_tft, pck_req,
dss_clk_get_rate(DSS_CLK_FCK1), &dispc_cinfo);
else {
struct dss_clock_info dss_cinfo;
int r;
r = dss_calc_clock_div(is_tft, pck_req,
&dss_cinfo, &dispc_cinfo);
if (r)
return r;
r = dss_set_clock_div(&dss_cinfo);
if (r)
return r;
}
dss_select_dispc_clk_source(ix, DSS_SRC_DSS1_ALWON_FCLK);
if (cpu_is_omap44xx())
dss_select_lcd_clk_source(ix, DSS_SRC_DSS1_ALWON_FCLK);
dispc_set_clock_div(channel, &dispc_cinfo);
*pck = dispc_cinfo.pck;
return 0;
}
static int dpi_set_dispc_clk(struct omap_dss_device *dssdev,
unsigned long pck_req, unsigned long *fck, int *lck_div,
int *pck_div)
{
struct dss_clock_info dss_cinfo;
struct dispc_clock_info dispc_cinfo;
int r;
r = dss_calc_clock_div(pck_req, &dss_cinfo, &dispc_cinfo);
if (r)
return r;
r = dss_set_clock_div(&dss_cinfo);
if (r)
return r;
dpi.mgr_config.clock_info = dispc_cinfo;
*fck = dss_cinfo.fck;
*lck_div = dispc_cinfo.lck_div;
*pck_div = dispc_cinfo.pck_div;
return 0;
}
int omapdss_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;
if (dssdev->manager == NULL) {
DSSERR("failed to enable display: no manager\n");
return -ENODEV;
}
r = omap_dss_start_device(dssdev);
if (r) {
DSSERR("failed to start device\n");
goto err_start_dev;
}
r = regulator_enable(sdi.vdds_sdi_reg);
if (r)
goto err_reg_enable;
r = dss_runtime_get();
if (r)
goto err_get_dss;
r = dispc_runtime_get();
if (r)
goto err_get_dispc;
sdi_basic_init(dssdev);
/* */
dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF;
dispc_mgr_set_pol_freq(dssdev->manager->id, dssdev->panel.config,
dssdev->panel.acbi, dssdev->panel.acb);
r = dss_calc_clock_div(1, t->pixel_clock * 1000,
&dss_cinfo, &dispc_cinfo);
if (r)
goto err_calc_clock_div;
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_mgr_set_lcd_timings(dssdev->manager->id, t);
r = dss_set_clock_div(&dss_cinfo);
if (r)
goto err_set_dss_clock_div;
r = dispc_mgr_set_clock_div(dssdev->manager->id, &dispc_cinfo);
if (r)
goto err_set_dispc_clock_div;
dss_sdi_init(dssdev->phy.sdi.datapairs);
r = dss_sdi_enable();
if (r)
goto err_sdi_enable;
mdelay(2);
r = dss_mgr_enable(dssdev->manager);
if (r)
goto err_mgr_enable;
return 0;
err_mgr_enable:
dss_sdi_disable();
err_sdi_enable:
err_set_dispc_clock_div:
err_set_dss_clock_div:
err_calc_clock_div:
dispc_runtime_put();
err_get_dispc:
dss_runtime_put();
err_get_dss:
regulator_disable(sdi.vdds_sdi_reg);
err_reg_enable:
omap_dss_stop_device(dssdev);
err_start_dev:
return r;
}
int omapdss_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;
}
r = regulator_enable(sdi.vdds_sdi_reg);
if (r)
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);
}
dssdev->manager->enable(dssdev->manager);
sdi.skip_init = 0;
return 0;
err2:
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
regulator_disable(sdi.vdds_sdi_reg);
err1:
omap_dss_stop_device(dssdev);
err0:
return r;
}
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;
/* TODO: update for LCD2 here */
dispc_set_pol_freq(OMAP_DSS_CHANNEL_LCD, 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;
}
/* TODO: if needed, add LCD2 support here*/
dispc_set_lcd_timings(OMAP_DSS_CHANNEL_LCD, 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);
}
/* TODO: change here if LCD2 support is needed */
dispc_enable_lcd_out(OMAP_DSS_CHANNEL_LCD, 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:
/* TODO: change here if LCD2 support is needed */
dispc_enable_lcd_out(OMAP_DSS_CHANNEL_LCD, 0);
err2:
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
err1:
omap_dss_stop_device(dssdev);
err0:
return r;
}
