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OMAP: DSS2: Add support for LG Philips LB035Q02 panel
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This patch adds support for the Gumstix Palo35 expansion board
which utilizes the 320 x 240 pixel LG.Philips LB035Q02 LCD Panel

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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Steve Sakoman authored and Tomi Valkeinen committed Mar 11, 2011
1 parent b9cb098 commit 7654b4d
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6 changes: 6 additions & 0 deletions drivers/video/omap2/displays/Kconfig
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Expand Up @@ -9,6 +9,12 @@ config PANEL_GENERIC_DPI
Supports LCD Panel used in TI SDP3430 and EVM boards,
OMAP3517 EVM boards and CM-T35.

config PANEL_LGPHILIPS_LB035Q02
tristate "LG.Philips LB035Q02 LCD Panel"
depends on OMAP2_DSS && SPI
help
LCD Panel used on the Gumstix Overo Palo35

config PANEL_SHARP_LS037V7DW01
tristate "Sharp LS037V7DW01 LCD Panel"
depends on OMAP2_DSS
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1 change: 1 addition & 0 deletions drivers/video/omap2/displays/Makefile
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@@ -1,4 +1,5 @@
obj-$(CONFIG_PANEL_GENERIC_DPI) += panel-generic-dpi.o
obj-$(CONFIG_PANEL_LGPHILIPS_LB035Q02) += panel-lgphilips-lb035q02.o
obj-$(CONFIG_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o
obj-$(CONFIG_PANEL_NEC_NL8048HL11_01B) += panel-nec-nl8048hl11-01b.o

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279 changes: 279 additions & 0 deletions drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
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@@ -0,0 +1,279 @@
/*
* LCD panel driver for LG.Philips LB035Q02
*
* Author: Steve Sakoman <steve@sakoman.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/>.
*/

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/mutex.h>

#include <plat/display.h>

struct lb035q02_data {
struct mutex lock;
};

static struct omap_video_timings lb035q02_timings = {
.x_res = 320,
.y_res = 240,

.pixel_clock = 6500,

.hsw = 2,
.hfp = 20,
.hbp = 68,

.vsw = 2,
.vfp = 4,
.vbp = 18,
};

static int lb035q02_panel_power_on(struct omap_dss_device *dssdev)
{
int r;

if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
return 0;

r = omapdss_dpi_display_enable(dssdev);
if (r)
goto err0;

if (dssdev->platform_enable) {
r = dssdev->platform_enable(dssdev);
if (r)
goto err1;
}

return 0;
err1:
omapdss_dpi_display_disable(dssdev);
err0:
return r;
}

static void lb035q02_panel_power_off(struct omap_dss_device *dssdev)
{
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
return;

if (dssdev->platform_disable)
dssdev->platform_disable(dssdev);

omapdss_dpi_display_disable(dssdev);
}

static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
{
struct lb035q02_data *ld;
int r;

dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
OMAP_DSS_LCD_IHS;
dssdev->panel.timings = lb035q02_timings;

ld = kzalloc(sizeof(*ld), GFP_KERNEL);
if (!ld) {
r = -ENOMEM;
goto err;
}
mutex_init(&ld->lock);
dev_set_drvdata(&dssdev->dev, ld);
return 0;
err:
return r;
}

static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
{
struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);

kfree(ld);
}

static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
{
struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
int r;

mutex_lock(&ld->lock);

r = lb035q02_panel_power_on(dssdev);
if (r)
goto err;
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

mutex_unlock(&ld->lock);
return 0;
err:
mutex_unlock(&ld->lock);
return r;
}

static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
{
struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);

mutex_lock(&ld->lock);

lb035q02_panel_power_off(dssdev);
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;

mutex_unlock(&ld->lock);
}

static int lb035q02_panel_suspend(struct omap_dss_device *dssdev)
{
struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);

mutex_lock(&ld->lock);

lb035q02_panel_power_off(dssdev);
dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;

mutex_unlock(&ld->lock);
return 0;
}

static int lb035q02_panel_resume(struct omap_dss_device *dssdev)
{
struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
int r;

mutex_lock(&ld->lock);

r = lb035q02_panel_power_on(dssdev);
if (r)
goto err;
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

mutex_unlock(&ld->lock);
return 0;
err:
mutex_unlock(&ld->lock);
return r;
}

static struct omap_dss_driver lb035q02_driver = {
.probe = lb035q02_panel_probe,
.remove = lb035q02_panel_remove,

.enable = lb035q02_panel_enable,
.disable = lb035q02_panel_disable,
.suspend = lb035q02_panel_suspend,
.resume = lb035q02_panel_resume,

.driver = {
.name = "lgphilips_lb035q02_panel",
.owner = THIS_MODULE,
},
};

static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
{
struct spi_message msg;
struct spi_transfer index_xfer = {
.len = 3,
.cs_change = 1,
};
struct spi_transfer value_xfer = {
.len = 3,
};
u8 buffer[16];

spi_message_init(&msg);

/* register index */
buffer[0] = 0x70;
buffer[1] = 0x00;
buffer[2] = reg & 0x7f;
index_xfer.tx_buf = buffer;
spi_message_add_tail(&index_xfer, &msg);

/* register value */
buffer[4] = 0x72;
buffer[5] = val >> 8;
buffer[6] = val;
value_xfer.tx_buf = buffer + 4;
spi_message_add_tail(&value_xfer, &msg);

return spi_sync(spi, &msg);
}

static void init_lb035q02_panel(struct spi_device *spi)
{
/* Init sequence from page 28 of the lb035q02 spec */
lb035q02_write_reg(spi, 0x01, 0x6300);
lb035q02_write_reg(spi, 0x02, 0x0200);
lb035q02_write_reg(spi, 0x03, 0x0177);
lb035q02_write_reg(spi, 0x04, 0x04c7);
lb035q02_write_reg(spi, 0x05, 0xffc0);
lb035q02_write_reg(spi, 0x06, 0xe806);
lb035q02_write_reg(spi, 0x0a, 0x4008);
lb035q02_write_reg(spi, 0x0b, 0x0000);
lb035q02_write_reg(spi, 0x0d, 0x0030);
lb035q02_write_reg(spi, 0x0e, 0x2800);
lb035q02_write_reg(spi, 0x0f, 0x0000);
lb035q02_write_reg(spi, 0x16, 0x9f80);
lb035q02_write_reg(spi, 0x17, 0x0a0f);
lb035q02_write_reg(spi, 0x1e, 0x00c1);
lb035q02_write_reg(spi, 0x30, 0x0300);
lb035q02_write_reg(spi, 0x31, 0x0007);
lb035q02_write_reg(spi, 0x32, 0x0000);
lb035q02_write_reg(spi, 0x33, 0x0000);
lb035q02_write_reg(spi, 0x34, 0x0707);
lb035q02_write_reg(spi, 0x35, 0x0004);
lb035q02_write_reg(spi, 0x36, 0x0302);
lb035q02_write_reg(spi, 0x37, 0x0202);
lb035q02_write_reg(spi, 0x3a, 0x0a0d);
lb035q02_write_reg(spi, 0x3b, 0x0806);
}

static int __devinit lb035q02_panel_spi_probe(struct spi_device *spi)
{
init_lb035q02_panel(spi);
return omap_dss_register_driver(&lb035q02_driver);
}

static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi)
{
omap_dss_unregister_driver(&lb035q02_driver);
return 0;
}

static struct spi_driver lb035q02_spi_driver = {
.driver = {
.name = "lgphilips_lb035q02_panel-spi",
.owner = THIS_MODULE,
},
.probe = lb035q02_panel_spi_probe,
.remove = __devexit_p(lb035q02_panel_spi_remove),
};

static int __init lb035q02_panel_drv_init(void)
{
return spi_register_driver(&lb035q02_spi_driver);
}

static void __exit lb035q02_panel_drv_exit(void)
{
spi_unregister_driver(&lb035q02_spi_driver);
}

module_init(lb035q02_panel_drv_init);
module_exit(lb035q02_panel_drv_exit);
MODULE_LICENSE("GPL");

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