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Commit 7654b4d3 authored by Steve Sakoman's avatar Steve Sakoman Committed by Tomi Valkeinen
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OMAP: DSS2: Add support for LG Philips LB035Q02 panel 



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: default avatarSteve Sakoman <steve@sakoman.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent b9cb0984

drivers/video/omap2/displays/Kconfig

+6 −0
Original line number Original line Diff line number Diff line
@@ -9,6 +9,12 @@ config PANEL_GENERIC_DPI 
	  Supports LCD Panel used in TI SDP3430 and EVM boards,

	  Supports LCD Panel used in TI SDP3430 and EVM boards,

	  OMAP3517 EVM boards and CM-T35.

	  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

config PANEL_SHARP_LS037V7DW01

        tristate "Sharp LS037V7DW01 LCD Panel"

        tristate "Sharp LS037V7DW01 LCD Panel"

        depends on OMAP2_DSS

        depends on OMAP2_DSS

drivers/video/omap2/displays/Makefile

+1 −0
Original line number Original line Diff line number Diff line 
obj-$(CONFIG_PANEL_GENERIC_DPI) += panel-generic-dpi.o

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_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o

obj-$(CONFIG_PANEL_NEC_NL8048HL11_01B) += panel-nec-nl8048hl11-01b.o

obj-$(CONFIG_PANEL_NEC_NL8048HL11_01B) += panel-nec-nl8048hl11-01b.o

drivers/video/omap2/displays/panel-lgphilips-lb035q02.c

0 → 100644
+279 −0
Original line number Original line Diff line number Diff line 
/*

 * 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");