mirror of https://gitee.com/openkylin/linux.git
OMAP: DSS2: DPI driver
This implements MIPI DPI interface. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Tomi Valkeinen
parent
80c397120f
commit
553c48cf5b
|
|
@ -0,0 +1,399 @@
|
|||
/*
|
||||
* linux/drivers/video/omap2/dss/dpi.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 "DPI"
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/errno.h>
|
||||
|
||||
#include <plat/display.h>
|
||||
#include <plat/cpu.h>
|
||||
|
||||
#include "dss.h"
|
||||
|
||||
static struct {
|
||||
int update_enabled;
|
||||
} dpi;
|
||||
|
||||
#ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
|
||||
static int dpi_set_dsi_clk(bool is_tft, unsigned long pck_req,
|
||||
unsigned long *fck, int *lck_div, int *pck_div)
|
||||
{
|
||||
struct dsi_clock_info dsi_cinfo;
|
||||
struct dispc_clock_info dispc_cinfo;
|
||||
int r;
|
||||
|
||||
r = dsi_pll_calc_clock_div_pck(is_tft, pck_req, &dsi_cinfo,
|
||||
&dispc_cinfo);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
r = dsi_pll_set_clock_div(&dsi_cinfo);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
dss_select_clk_source(0, 1);
|
||||
|
||||
r = dispc_set_clock_div(&dispc_cinfo);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
*fck = dsi_cinfo.dsi1_pll_fclk;
|
||||
*lck_div = dispc_cinfo.lck_div;
|
||||
*pck_div = dispc_cinfo.pck_div;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
static int dpi_set_dispc_clk(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(&dispc_cinfo);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
*fck = dss_cinfo.fck;
|
||||
*lck_div = dispc_cinfo.lck_div;
|
||||
*pck_div = dispc_cinfo.pck_div;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int dpi_set_mode(struct omap_dss_device *dssdev)
|
||||
{
|
||||
struct omap_video_timings *t = &dssdev->panel.timings;
|
||||
int lck_div, pck_div;
|
||||
unsigned long fck;
|
||||
unsigned long pck;
|
||||
bool is_tft;
|
||||
int r = 0;
|
||||
|
||||
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
dispc_set_pol_freq(dssdev->panel.config, dssdev->panel.acbi,
|
||||
dssdev->panel.acb);
|
||||
|
||||
is_tft = (dssdev->panel.config & OMAP_DSS_LCD_TFT) != 0;
|
||||
|
||||
#ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
|
||||
r = dpi_set_dsi_clk(is_tft, t->pixel_clock * 1000,
|
||||
&fck, &lck_div, &pck_div);
|
||||
#else
|
||||
r = dpi_set_dispc_clk(is_tft, t->pixel_clock * 1000,
|
||||
&fck, &lck_div, &pck_div);
|
||||
#endif
|
||||
if (r)
|
||||
goto err0;
|
||||
|
||||
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);
|
||||
|
||||
err0:
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int dpi_basic_init(struct omap_dss_device *dssdev)
|
||||
{
|
||||
bool is_tft;
|
||||
|
||||
is_tft = (dssdev->panel.config & OMAP_DSS_LCD_TFT) != 0;
|
||||
|
||||
dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_BYPASS);
|
||||
dispc_set_lcd_display_type(is_tft ? OMAP_DSS_LCD_DISPLAY_TFT :
|
||||
OMAP_DSS_LCD_DISPLAY_STN);
|
||||
dispc_set_tft_data_lines(dssdev->phy.dpi.data_lines);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int dpi_display_enable(struct omap_dss_device *dssdev)
|
||||
{
|
||||
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("display already enabled\n");
|
||||
r = -EINVAL;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
r = dpi_basic_init(dssdev);
|
||||
if (r)
|
||||
goto err2;
|
||||
|
||||
#ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
|
||||
dss_clk_enable(DSS_CLK_FCK2);
|
||||
r = dsi_pll_init(dssdev, 0, 1);
|
||||
if (r)
|
||||
goto err3;
|
||||
#endif
|
||||
r = dpi_set_mode(dssdev);
|
||||
if (r)
|
||||
goto err4;
|
||||
|
||||
mdelay(2);
|
||||
|
||||
dispc_enable_lcd_out(1);
|
||||
|
||||
r = dssdev->driver->enable(dssdev);
|
||||
if (r)
|
||||
goto err5;
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
||||
|
||||
return 0;
|
||||
|
||||
err5:
|
||||
dispc_enable_lcd_out(0);
|
||||
err4:
|
||||
#ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
|
||||
dsi_pll_uninit();
|
||||
err3:
|
||||
dss_clk_disable(DSS_CLK_FCK2);
|
||||
#endif
|
||||
err2:
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
err1:
|
||||
omap_dss_stop_device(dssdev);
|
||||
err0:
|
||||
return r;
|
||||
}
|
||||
|
||||
static int dpi_display_resume(struct omap_dss_device *dssdev);
|
||||
|
||||
static void dpi_display_disable(struct omap_dss_device *dssdev)
|
||||
{
|
||||
if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED)
|
||||
return;
|
||||
|
||||
if (dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED)
|
||||
dpi_display_resume(dssdev);
|
||||
|
||||
dssdev->driver->disable(dssdev);
|
||||
|
||||
dispc_enable_lcd_out(0);
|
||||
|
||||
#ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
|
||||
dss_select_clk_source(0, 0);
|
||||
dsi_pll_uninit();
|
||||
dss_clk_disable(DSS_CLK_FCK2);
|
||||
#endif
|
||||
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
|
||||
|
||||
omap_dss_stop_device(dssdev);
|
||||
}
|
||||
|
||||
static int dpi_display_suspend(struct omap_dss_device *dssdev)
|
||||
{
|
||||
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
|
||||
return -EINVAL;
|
||||
|
||||
DSSDBG("dpi_display_suspend\n");
|
||||
|
||||
if (dssdev->driver->suspend)
|
||||
dssdev->driver->suspend(dssdev);
|
||||
|
||||
dispc_enable_lcd_out(0);
|
||||
|
||||
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int dpi_display_resume(struct omap_dss_device *dssdev)
|
||||
{
|
||||
if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED)
|
||||
return -EINVAL;
|
||||
|
||||
DSSDBG("dpi_display_resume\n");
|
||||
|
||||
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
|
||||
|
||||
dispc_enable_lcd_out(1);
|
||||
|
||||
if (dssdev->driver->resume)
|
||||
dssdev->driver->resume(dssdev);
|
||||
|
||||
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void dpi_set_timings(struct omap_dss_device *dssdev,
|
||||
struct omap_video_timings *timings)
|
||||
{
|
||||
DSSDBG("dpi_set_timings\n");
|
||||
dssdev->panel.timings = *timings;
|
||||
if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
|
||||
dpi_set_mode(dssdev);
|
||||
dispc_go(OMAP_DSS_CHANNEL_LCD);
|
||||
}
|
||||
}
|
||||
|
||||
static int dpi_check_timings(struct omap_dss_device *dssdev,
|
||||
struct omap_video_timings *timings)
|
||||
{
|
||||
bool is_tft;
|
||||
int r;
|
||||
int lck_div, pck_div;
|
||||
unsigned long fck;
|
||||
unsigned long pck;
|
||||
|
||||
if (!dispc_lcd_timings_ok(timings))
|
||||
return -EINVAL;
|
||||
|
||||
if (timings->pixel_clock == 0)
|
||||
return -EINVAL;
|
||||
|
||||
is_tft = (dssdev->panel.config & OMAP_DSS_LCD_TFT) != 0;
|
||||
|
||||
#ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
|
||||
{
|
||||
struct dsi_clock_info dsi_cinfo;
|
||||
struct dispc_clock_info dispc_cinfo;
|
||||
r = dsi_pll_calc_clock_div_pck(is_tft,
|
||||
timings->pixel_clock * 1000,
|
||||
&dsi_cinfo, &dispc_cinfo);
|
||||
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
fck = dsi_cinfo.dsi1_pll_fclk;
|
||||
lck_div = dispc_cinfo.lck_div;
|
||||
pck_div = dispc_cinfo.pck_div;
|
||||
}
|
||||
#else
|
||||
{
|
||||
struct dss_clock_info dss_cinfo;
|
||||
struct dispc_clock_info dispc_cinfo;
|
||||
r = dss_calc_clock_div(is_tft, timings->pixel_clock * 1000,
|
||||
&dss_cinfo, &dispc_cinfo);
|
||||
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
fck = dss_cinfo.fck;
|
||||
lck_div = dispc_cinfo.lck_div;
|
||||
pck_div = dispc_cinfo.pck_div;
|
||||
}
|
||||
#endif
|
||||
|
||||
pck = fck / lck_div / pck_div / 1000;
|
||||
|
||||
timings->pixel_clock = pck;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void dpi_get_timings(struct omap_dss_device *dssdev,
|
||||
struct omap_video_timings *timings)
|
||||
{
|
||||
*timings = dssdev->panel.timings;
|
||||
}
|
||||
|
||||
static int dpi_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);
|
||||
dpi.update_enabled = 0;
|
||||
} else {
|
||||
dispc_enable_lcd_out(1);
|
||||
dpi.update_enabled = 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static enum omap_dss_update_mode dpi_display_get_update_mode(
|
||||
struct omap_dss_device *dssdev)
|
||||
{
|
||||
return dpi.update_enabled ? OMAP_DSS_UPDATE_AUTO :
|
||||
OMAP_DSS_UPDATE_DISABLED;
|
||||
}
|
||||
|
||||
int dpi_init_display(struct omap_dss_device *dssdev)
|
||||
{
|
||||
DSSDBG("init_display\n");
|
||||
|
||||
dssdev->enable = dpi_display_enable;
|
||||
dssdev->disable = dpi_display_disable;
|
||||
dssdev->suspend = dpi_display_suspend;
|
||||
dssdev->resume = dpi_display_resume;
|
||||
dssdev->set_timings = dpi_set_timings;
|
||||
dssdev->check_timings = dpi_check_timings;
|
||||
dssdev->get_timings = dpi_get_timings;
|
||||
dssdev->set_update_mode = dpi_display_set_update_mode;
|
||||
dssdev->get_update_mode = dpi_display_get_update_mode;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int dpi_init(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
void dpi_exit(void)
|
||||
{
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue