hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

omapfb: add support for MIPI-DCS compatible LCDs 

Fixed-by: Mike Wege <ext-mike.wege@nokia.com>
Fixed-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Fixed-by: Timo Savola <tsavola@movial.fi>
Fixed-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Fixed-by: Trilok Soni <soni.trilok@gmail.com>
Signed-off-by: Imre Deak <imre.deak@solidboot.com>
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Imre Deak 2009-09-22 16:46:41 -07:00 committed by Linus Torvalds
parent 28ff0c12b7
commit 66d2f99d0b
4 changed files with 639 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/plat-omap/include/mach/lcd_mipid.h
View File

@ -16,7 +16,12 @@ enum mipid_test_result {
struct mipid_platform_data {
int nreset_gpio;
int data_lines;
void (*shutdown)(struct mipid_platform_data *pdata);
void (*set_bklight_level)(struct mipid_platform_data *pdata,
int level);
int (*get_bklight_level)(struct mipid_platform_data *pdata);
int (*get_bklight_max)(struct mipid_platform_data *pdata);
};
#endif

8
drivers/video/omap/Kconfig
View File

@ -7,6 +7,14 @@ config FB_OMAP
help
Frame buffer driver for OMAP based boards.
config FB_OMAP_LCD_MIPID
bool "MIPI DBI-C/DCS compatible LCD support"
depends on FB_OMAP && SPI_MASTER
help
Say Y here if you want to have support for LCDs compatible with
the Mobile Industry Processor Interface DBI-C/DCS
specification. (Supported LCDs: Philips LPH8923, Sharp LS041Y3)
config FB_OMAP_BOOTLOADER_INIT
bool "Check bootloader initialization"
depends on FB_OMAP

1
drivers/video/omap/Makefile
View File

@ -25,6 +25,7 @@ objs-$(CONFIG_ARCH_OMAP15XX)$(CONFIG_MACH_OMAP_INNOVATOR) += lcd_inn1510.o
objs-y$(CONFIG_MACH_OMAP_OSK) += lcd_osk.o
objs-y$(CONFIG_MACH_OMAP_APOLLON) += lcd_apollon.o
objs-y$(CONFIG_FB_OMAP_LCD_MIPID) += lcd_mipid.o
omapfb-objs := $(objs-yy)

625
drivers/video/omap/lcd_mipid.c Normal file
View File

@ -0,0 +1,625 @@
/*
* LCD driver for MIPI DBI-C / DCS compatible LCDs
*
* Copyright (C) 2006 Nokia Corporation
* Author: Imre Deak <imre.deak@nokia.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* 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, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/spi/spi.h>
#include <mach/omapfb.h>
#include <mach/lcd_mipid.h>
#define MIPID_MODULE_NAME "lcd_mipid"
#define MIPID_CMD_READ_DISP_ID 0x04
#define MIPID_CMD_READ_RED 0x06
#define MIPID_CMD_READ_GREEN 0x07
#define MIPID_CMD_READ_BLUE 0x08
#define MIPID_CMD_READ_DISP_STATUS 0x09
#define MIPID_CMD_RDDSDR 0x0F
#define MIPID_CMD_SLEEP_IN 0x10
#define MIPID_CMD_SLEEP_OUT 0x11
#define MIPID_CMD_DISP_OFF 0x28
#define MIPID_CMD_DISP_ON 0x29
#define MIPID_ESD_CHECK_PERIOD msecs_to_jiffies(5000)
#define to_mipid_device(p) container_of(p, struct mipid_device, \
panel)
struct mipid_device {
int enabled;
int revision;
unsigned int saved_bklight_level;
unsigned long hw_guard_end; /* next value of jiffies
when we can issue the
next sleep in/out command */
unsigned long hw_guard_wait; /* max guard time in jiffies */
struct omapfb_device *fbdev;
struct spi_device *spi;
struct mutex mutex;
struct lcd_panel panel;
struct workqueue_struct *esd_wq;
struct delayed_work esd_work;
void (*esd_check)(struct mipid_device *m);
};
static void mipid_transfer(struct mipid_device *md, int cmd, const u8 *wbuf,
int wlen, u8 *rbuf, int rlen)
{
struct spi_message m;
struct spi_transfer *x, xfer[4];
u16 w;
int r;
BUG_ON(md->spi == NULL);
spi_message_init(&m);
memset(xfer, 0, sizeof(xfer));
x = &xfer[0];
cmd &= 0xff;
x->tx_buf = &cmd;
x->bits_per_word = 9;
x->len = 2;
spi_message_add_tail(x, &m);
if (wlen) {
x++;
x->tx_buf = wbuf;
x->len = wlen;
x->bits_per_word = 9;
spi_message_add_tail(x, &m);
}
if (rlen) {
x++;
x->rx_buf = &w;
x->len = 1;
spi_message_add_tail(x, &m);
if (rlen > 1) {
/* Arrange for the extra clock before the first
* data bit.
*/
x->bits_per_word = 9;
x->len = 2;
x++;
x->rx_buf = &rbuf[1];
x->len = rlen - 1;
spi_message_add_tail(x, &m);
}
}
r = spi_sync(md->spi, &m);
if (r < 0)
dev_dbg(&md->spi->dev, "spi_sync %d\n", r);
if (rlen)
rbuf[0] = w & 0xff;
}
static inline void mipid_cmd(struct mipid_device *md, int cmd)
{
mipid_transfer(md, cmd, NULL, 0, NULL, 0);
}
static inline void mipid_write(struct mipid_device *md,
int reg, const u8 *buf, int len)
{
mipid_transfer(md, reg, buf, len, NULL, 0);
}
static inline void mipid_read(struct mipid_device *md,
int reg, u8 *buf, int len)
{
mipid_transfer(md, reg, NULL, 0, buf, len);
}
static void set_data_lines(struct mipid_device *md, int data_lines)
{
u16 par;
switch (data_lines) {
case 16:
par = 0x150;
break;
case 18:
par = 0x160;
break;
case 24:
par = 0x170;
break;
}
mipid_write(md, 0x3a, (u8 *)&par, 2);
}
static void send_init_string(struct mipid_device *md)
{
u16 initpar[] = { 0x0102, 0x0100, 0x0100 };
mipid_write(md, 0xc2, (u8 *)initpar, sizeof(initpar));
set_data_lines(md, md->panel.data_lines);
}
static void hw_guard_start(struct mipid_device *md, int guard_msec)
{
md->hw_guard_wait = msecs_to_jiffies(guard_msec);
md->hw_guard_end = jiffies + md->hw_guard_wait;
}
static void hw_guard_wait(struct mipid_device *md)
{
unsigned long wait = md->hw_guard_end - jiffies;
if ((long)wait > 0 && wait <= md->hw_guard_wait) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(wait);
}
}
static void set_sleep_mode(struct mipid_device *md, int on)
{
int cmd, sleep_time = 50;
if (on)
cmd = MIPID_CMD_SLEEP_IN;
else
cmd = MIPID_CMD_SLEEP_OUT;
hw_guard_wait(md);
mipid_cmd(md, cmd);
hw_guard_start(md, 120);
/*
* When we enable the panel, it seems we _have_ to sleep
* 120 ms before sending the init string. When disabling the
* panel we'll sleep for the duration of 2 frames, so that the
* controller can still provide the PCLK,HS,VS signals.
*/
if (!on)
sleep_time = 120;
msleep(sleep_time);
}
static void set_display_state(struct mipid_device *md, int enabled)
{
int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
mipid_cmd(md, cmd);
}
static int mipid_set_bklight_level(struct lcd_panel *panel, unsigned int level)
{
struct mipid_device *md = to_mipid_device(panel);
struct mipid_platform_data *pd = md->spi->dev.platform_data;
if (pd->get_bklight_max == NULL || pd->set_bklight_level == NULL)
return -ENODEV;
if (level > pd->get_bklight_max(pd))
return -EINVAL;
if (!md->enabled) {
md->saved_bklight_level = level;
return 0;
}
pd->set_bklight_level(pd, level);
return 0;
}
static unsigned int mipid_get_bklight_level(struct lcd_panel *panel)
{
struct mipid_device *md = to_mipid_device(panel);
struct mipid_platform_data *pd = md->spi->dev.platform_data;
if (pd->get_bklight_level == NULL)
return -ENODEV;
return pd->get_bklight_level(pd);
}
static unsigned int mipid_get_bklight_max(struct lcd_panel *panel)
{
struct mipid_device *md = to_mipid_device(panel);
struct mipid_platform_data *pd = md->spi->dev.platform_data;
if (pd->get_bklight_max == NULL)
return -ENODEV;
return pd->get_bklight_max(pd);
}
static unsigned long mipid_get_caps(struct lcd_panel *panel)
{
return OMAPFB_CAPS_SET_BACKLIGHT;
}
static u16 read_first_pixel(struct mipid_device *md)
{
u16 pixel;
u8 red, green, blue;
mutex_lock(&md->mutex);
mipid_read(md, MIPID_CMD_READ_RED, &red, 1);
mipid_read(md, MIPID_CMD_READ_GREEN, &green, 1);
mipid_read(md, MIPID_CMD_READ_BLUE, &blue, 1);
mutex_unlock(&md->mutex);
switch (md->panel.data_lines) {
case 16:
pixel = ((red >> 1) << 11) | (green << 5) | (blue >> 1);
break;
case 24:
/* 24 bit -> 16 bit */
pixel = ((red >> 3) << 11) | ((green >> 2) << 5) |
(blue >> 3);
break;
default:
pixel = 0;
BUG();
}
return pixel;
}
static int mipid_run_test(struct lcd_panel *panel, int test_num)
{
struct mipid_device *md = to_mipid_device(panel);
static const u16 test_values[4] = {
0x0000, 0xffff, 0xaaaa, 0x5555,
};
int i;
if (test_num != MIPID_TEST_RGB_LINES)
return MIPID_TEST_INVALID;
for (i = 0; i < ARRAY_SIZE(test_values); i++) {
int delay;
unsigned long tmo;
omapfb_write_first_pixel(md->fbdev, test_values[i]);
tmo = jiffies + msecs_to_jiffies(100);
delay = 25;
while (1) {
u16 pixel;
msleep(delay);
pixel = read_first_pixel(md);
if (pixel == test_values[i])
break;
if (time_after(jiffies, tmo)) {
dev_err(&md->spi->dev,
"MIPI LCD RGB I/F test failed: "
"expecting %04x, got %04x\n",
test_values[i], pixel);
return MIPID_TEST_FAILED;
}
delay = 10;
}
}
return 0;
}
static void ls041y3_esd_recover(struct mipid_device *md)
{
dev_err(&md->spi->dev, "performing LCD ESD recovery\n");
set_sleep_mode(md, 1);
set_sleep_mode(md, 0);
}
static void ls041y3_esd_check_mode1(struct mipid_device *md)
{
u8 state1, state2;
mipid_read(md, MIPID_CMD_RDDSDR, &state1, 1);
set_sleep_mode(md, 0);
mipid_read(md, MIPID_CMD_RDDSDR, &state2, 1);
dev_dbg(&md->spi->dev, "ESD mode 1 state1 %02x state2 %02x\n",
state1, state2);
/* Each sleep out command will trigger a self diagnostic and flip
* Bit6 if the test passes.
*/
if (!((state1 ^ state2) & (1 << 6)))
ls041y3_esd_recover(md);
}
static void ls041y3_esd_check_mode2(struct mipid_device *md)
{
int i;
u8 rbuf[2];
static const struct {
int cmd;
int wlen;
u16 wbuf[3];
} *rd, rd_ctrl[7] = {
{ 0xb0, 4, { 0x0101, 0x01fe, } },
{ 0xb1, 4, { 0x01de, 0x0121, } },
{ 0xc2, 4, { 0x0100, 0x0100, } },
{ 0xbd, 2, { 0x0100, } },
{ 0xc2, 4, { 0x01fc, 0x0103, } },
{ 0xb4, 0, },
{ 0x00, 0, },
};
rd = rd_ctrl;
for (i = 0; i < 3; i++, rd++)
mipid_write(md, rd->cmd, (u8 *)rd->wbuf, rd->wlen);
udelay(10);
mipid_read(md, rd->cmd, rbuf, 2);
rd++;
for (i = 0; i < 3; i++, rd++) {
udelay(10);
mipid_write(md, rd->cmd, (u8 *)rd->wbuf, rd->wlen);
}
dev_dbg(&md->spi->dev, "ESD mode 2 state %02x\n", rbuf[1]);
if (rbuf[1] == 0x00)
ls041y3_esd_recover(md);
}
static void ls041y3_esd_check(struct mipid_device *md)
{
ls041y3_esd_check_mode1(md);
if (md->revision >= 0x88)
ls041y3_esd_check_mode2(md);
}
static void mipid_esd_start_check(struct mipid_device *md)
{
if (md->esd_check != NULL)
queue_delayed_work(md->esd_wq, &md->esd_work,
MIPID_ESD_CHECK_PERIOD);
}
static void mipid_esd_stop_check(struct mipid_device *md)
{
if (md->esd_check != NULL)
cancel_rearming_delayed_workqueue(md->esd_wq, &md->esd_work);
}
static void mipid_esd_work(struct work_struct *work)
{
struct mipid_device *md = container_of(work, struct mipid_device,
esd_work.work);
mutex_lock(&md->mutex);
md->esd_check(md);
mutex_unlock(&md->mutex);
mipid_esd_start_check(md);
}
static int mipid_enable(struct lcd_panel *panel)
{
struct mipid_device *md = to_mipid_device(panel);
mutex_lock(&md->mutex);
if (md->enabled) {
mutex_unlock(&md->mutex);
return 0;
}
set_sleep_mode(md, 0);
md->enabled = 1;
send_init_string(md);
set_display_state(md, 1);
mipid_set_bklight_level(panel, md->saved_bklight_level);
mipid_esd_start_check(md);
mutex_unlock(&md->mutex);
return 0;
}
static void mipid_disable(struct lcd_panel *panel)
{
struct mipid_device *md = to_mipid_device(panel);
/*
* A final ESD work might be called before returning,
* so do this without holding the lock.
*/
mipid_esd_stop_check(md);
mutex_lock(&md->mutex);
if (!md->enabled) {
mutex_unlock(&md->mutex);
return;
}
md->saved_bklight_level = mipid_get_bklight_level(panel);
mipid_set_bklight_level(panel, 0);
set_display_state(md, 0);
set_sleep_mode(md, 1);
md->enabled = 0;
mutex_unlock(&md->mutex);
}
static int panel_enabled(struct mipid_device *md)
{
u32 disp_status;
int enabled;
mipid_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4);
disp_status = __be32_to_cpu(disp_status);
enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
dev_dbg(&md->spi->dev,
"LCD panel %senabled by bootloader (status 0x%04x)\n",
enabled ? "" : "not ", disp_status);
return enabled;
}
static int mipid_init(struct lcd_panel *panel,
struct omapfb_device *fbdev)
{
struct mipid_device *md = to_mipid_device(panel);
md->fbdev = fbdev;
md->esd_wq = create_singlethread_workqueue("mipid_esd");
if (md->esd_wq == NULL) {
dev_err(&md->spi->dev, "can't create ESD workqueue\n");
return -ENOMEM;
}
INIT_DELAYED_WORK(&md->esd_work, mipid_esd_work);
mutex_init(&md->mutex);
md->enabled = panel_enabled(md);
if (md->enabled)
mipid_esd_start_check(md);
else
md->saved_bklight_level = mipid_get_bklight_level(panel);
return 0;
}
static void mipid_cleanup(struct lcd_panel *panel)
{
struct mipid_device *md = to_mipid_device(panel);
if (md->enabled)
mipid_esd_stop_check(md);
destroy_workqueue(md->esd_wq);
}
static struct lcd_panel mipid_panel = {
.config = OMAP_LCDC_PANEL_TFT,
.bpp = 16,
.x_res = 800,
.y_res = 480,
.pixel_clock = 21940,
.hsw = 50,
.hfp = 20,
.hbp = 15,
.vsw = 2,
.vfp = 1,
.vbp = 3,
.init = mipid_init,
.cleanup = mipid_cleanup,
.enable = mipid_enable,
.disable = mipid_disable,
.get_caps = mipid_get_caps,
.set_bklight_level = mipid_set_bklight_level,
.get_bklight_level = mipid_get_bklight_level,
.get_bklight_max = mipid_get_bklight_max,
.run_test = mipid_run_test,
};
static int mipid_detect(struct mipid_device *md)
{
struct mipid_platform_data *pdata;
u8 display_id[3];
pdata = md->spi->dev.platform_data;
if (pdata == NULL) {
dev_err(&md->spi->dev, "missing platform data\n");
return -ENOENT;
}
mipid_read(md, MIPID_CMD_READ_DISP_ID, display_id, 3);
dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n",
display_id[0], display_id[1], display_id[2]);
switch (display_id[0]) {
case 0x45:
md->panel.name = "lph8923";
break;
case 0x83:
md->panel.name = "ls041y3";
md->esd_check = ls041y3_esd_check;
break;
default:
md->panel.name = "unknown";
dev_err(&md->spi->dev, "invalid display ID\n");
return -ENODEV;
}
md->revision = display_id[1];
md->panel.data_lines = pdata->data_lines;
pr_info("omapfb: %s rev %02x LCD detected, %d data lines\n",
md->panel.name, md->revision, md->panel.data_lines);
return 0;
}
static int mipid_spi_probe(struct spi_device *spi)
{
struct mipid_device *md;
int r;
md = kzalloc(sizeof(*md), GFP_KERNEL);
if (md == NULL) {
dev_err(&spi->dev, "out of memory\n");
return -ENOMEM;
}
spi->mode = SPI_MODE_0;
md->spi = spi;
dev_set_drvdata(&spi->dev, md);
md->panel = mipid_panel;
r = mipid_detect(md);
if (r < 0)
return r;
omapfb_register_panel(&md->panel);
return 0;
}
static int mipid_spi_remove(struct spi_device *spi)
{
struct mipid_device *md = dev_get_drvdata(&spi->dev);
mipid_disable(&md->panel);
kfree(md);
return 0;
}
static struct spi_driver mipid_spi_driver = {
.driver = {
.name = MIPID_MODULE_NAME,
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = mipid_spi_probe,
.remove = __devexit_p(mipid_spi_remove),
};
static int mipid_drv_init(void)
{
spi_register_driver(&mipid_spi_driver);
return 0;
}
module_init(mipid_drv_init);
static void mipid_drv_cleanup(void)
{
spi_unregister_driver(&mipid_spi_driver);
}
module_exit(mipid_drv_cleanup);
MODULE_DESCRIPTION("MIPI display driver");
MODULE_LICENSE("GPL");