Re: [Linux-fbdev-devel] [PATCH 04/20] omapfb: Add support for the Amstrad Delta LCD

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TIS - Janusz Krzysztofik napisał(a):
> Thursday 04 June 2009 19:52:29 Imre Deak napisał(a):
>> From: Jonathan McDowell <no...@ea...>
>>
>> This is an updated version of the LCD driver for the Amstrad Delta to
>> take into account the recent changes to the omapfb infrastructure. The
>> Delta features a 480x320 12 bit DSTN panel.
> 
> Hi,
> 
> I'd really love to see the lcd_ams_delta support included in the mainline 
> kernel, but I am not sure if it is ready for submission, as I still have 
> issues with it. It does work perfectly unless power management is turned on.
> With CONFIG_PM=y, the omapfb device, after initially starting correctly, 
> breaks with the following error messages:
> 
> omapfb omapfb: resetting (status 0xffffff96,reset count 1)
> ...
> omapfb omapfb: resetting (status 0xffffff96,reset count 100)
> omapfb omapfb: too many reset attempts, giving up.
> 
> Tested with linux-2.6.30-rc5 and linux-omap revision 
> 90e758af52ba803cba233fabee81176d99589f09. Error messages do not appear when 
> CONFIG_PM=n or lcd_ams_delta.o is removed from omapfb-objs.

One idea for a temporary workaround: maybe we could just force PM=n in 
case of MACH_AMS_DELTA && FB_OMAP? PM already depends on !IA64_HP_SIM.

Janusz

> Please let me know what else I can do to help in resolving this issue.
> 
> Cheers,
> Janusz
> 
>> Signed-off-by: Jonathan McDowell <no...@ea...>
>> Signed-off-by: Tony Lindgren <to...@at...>
>> Signed-off-by: Imre Deak <imr...@no...>
>> ---
>>  drivers/video/omap/Makefile        |    1 +
>>  drivers/video/omap/lcd_ams_delta.c |  137
>> ++++++++++++++++++++++++++++++++++++ 2 files changed, 138 insertions(+), 0
>> deletions(-)
>>  create mode 100644 drivers/video/omap/lcd_ams_delta.c
>>
>> diff --git a/drivers/video/omap/Makefile b/drivers/video/omap/Makefile
>> index d86d54a..2bf94ad 100644
>> --- a/drivers/video/omap/Makefile
>> +++ b/drivers/video/omap/Makefile
>> @@ -15,6 +15,7 @@ objs-$(CONFIG_ARCH_OMAP2)$(CONFIG_FB_OMAP_LCDC_EXTERNAL)
>> += rfbi.o objs-y$(CONFIG_FB_OMAP_LCDC_HWA742) += hwa742.o
>>  objs-y$(CONFIG_FB_OMAP_LCDC_BLIZZARD) += blizzard.o
>>
>> +objs-y$(CONFIG_MACH_AMS_DELTA) += lcd_ams_delta.o
>>  objs-y$(CONFIG_MACH_OMAP_H4) += lcd_h4.o
>>  objs-y$(CONFIG_MACH_OMAP_H3) += lcd_h3.o
>>  objs-y$(CONFIG_MACH_OMAP_PALMTE) += lcd_palmte.o
>> diff --git a/drivers/video/omap/lcd_ams_delta.c
>> b/drivers/video/omap/lcd_ams_delta.c new file mode 100644
>> index 0000000..1f74399
>> --- /dev/null
>> +++ b/drivers/video/omap/lcd_ams_delta.c
>> @@ -0,0 +1,137 @@
>> +/*
>> + * Based on drivers/video/omap/lcd_inn1510.c
>> + *
>> + * LCD panel support for the Amstrad E3 (Delta) videophone.
>> + *
>> + * Copyright (C) 2006 Jonathan McDowell <no...@ea...>
>> + *
>> + * 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/module.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/io.h>
>> +#include <linux/delay.h>
>> +
>> +#include <mach/board-ams-delta.h>
>> +#include <mach/hardware.h>
>> +#include <mach/omapfb.h>
>> +
>> +#define AMS_DELTA_DEFAULT_CONTRAST	112
>> +
>> +static int ams_delta_panel_init(struct lcd_panel *panel,
>> +		struct omapfb_device *fbdev)
>> +{
>> +	return 0;
>> +}
>> +
>> +static void ams_delta_panel_cleanup(struct lcd_panel *panel)
>> +{
>> +}
>> +
>> +static int ams_delta_panel_enable(struct lcd_panel *panel)
>> +{
>> +	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_NDISP,
>> +			AMS_DELTA_LATCH2_LCD_NDISP);
>> +	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_VBLEN,
>> +			AMS_DELTA_LATCH2_LCD_VBLEN);
>> +
>> +	omap_writeb(1, OMAP_PWL_CLK_ENABLE);
>> +	omap_writeb(AMS_DELTA_DEFAULT_CONTRAST, OMAP_PWL_ENABLE);
>> +
>> +	return 0;
>> +}
>> +
>> +static void ams_delta_panel_disable(struct lcd_panel *panel)
>> +{
>> +	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_VBLEN, 0);
>> +	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_NDISP, 0);
>> +}
>> +
>> +static unsigned long ams_delta_panel_get_caps(struct lcd_panel *panel)
>> +{
>> +	return 0;
>> +}
>> +
>> +static struct lcd_panel ams_delta_panel = {
>> +	.name		= "ams-delta",
>> +	.config		= 0,
>> +
>> +	.bpp		= 12,
>> +	.data_lines	= 16,
>> +	.x_res		= 480,
>> +	.y_res		= 320,
>> +	.pixel_clock	= 4687,
>> +	.hsw		= 3,
>> +	.hfp		= 1,
>> +	.hbp		= 1,
>> +	.vsw		= 1,
>> +	.vfp		= 0,
>> +	.vbp		= 0,
>> +	.pcd		= 0,
>> +	.acb		= 37,
>> +
>> +	.init		= ams_delta_panel_init,
>> +	.cleanup	= ams_delta_panel_cleanup,
>> +	.enable		= ams_delta_panel_enable,
>> +	.disable	= ams_delta_panel_disable,
>> +	.get_caps	= ams_delta_panel_get_caps,
>> +};
>> +
>> +static int ams_delta_panel_probe(struct platform_device *pdev)
>> +{
>> +	omapfb_register_panel(&ams_delta_panel);
>> +	return 0;
>> +}
>> +
>> +static int ams_delta_panel_remove(struct platform_device *pdev)
>> +{
>> +	return 0;
>> +}
>> +
>> +static int ams_delta_panel_suspend(struct platform_device *pdev,
>> +		pm_message_t mesg)
>> +{
>> +	return 0;
>> +}
>> +
>> +static int ams_delta_panel_resume(struct platform_device *pdev)
>> +{
>> +	return 0;
>> +}
>> +
>> +struct platform_driver ams_delta_panel_driver = {
>> +	.probe		= ams_delta_panel_probe,
>> +	.remove		= ams_delta_panel_remove,
>> +	.suspend	= ams_delta_panel_suspend,
>> +	.resume		= ams_delta_panel_resume,
>> +	.driver		= {
>> +		.name	= "lcd_ams_delta",
>> +		.owner	= THIS_MODULE,
>> +	},
>> +};
>> +
>> +static int ams_delta_panel_drv_init(void)
>> +{
>> +	return platform_driver_register(&ams_delta_panel_driver);
>> +}
>> +
>> +static void ams_delta_panel_drv_cleanup(void)
>> +{
>> +	platform_driver_unregister(&ams_delta_panel_driver);
>> +}
>> +
>> +module_init(ams_delta_panel_drv_init);
>> +module_exit(ams_delta_panel_drv_cleanup);
> 
> 