RE: [PATCH] OMAP2: DSS: Add Innolux 7" display for DEVKIT8000

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> -----Original Message-----
> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap-
> owner@xxxxxxxxxxxxxxx] On Behalf Of swirl@xxxxxx
> Sent: Wednesday, March 31, 2010 1:56 PM
> To: linux-omap@xxxxxxxxxxxxxxx
> Cc: Thomas Weber; Thomas Weber
> Subject: [PATCH] OMAP2: DSS: Add Innolux 7" display for DEVKIT8000
> 
> From: Thomas Weber <swirl@xxxxxx>
> 
> This patch adds the Innolux AT070TN83 display.
> The Devkit8000 has a lcd connector and
> you can order your Devkit8000 with this display.
> 
> Signed-off-by: Thomas Weber <weber@xxxxxxxxxxxxx>
> ---
>  drivers/video/omap2/displays/Kconfig               |    8 +-
>  drivers/video/omap2/displays/Makefile              |    1 +
>  .../video/omap2/displays/panel-innolux-at070tn83.c |  154
> ++++++++++++++++++++
>  3 files changed, 162 insertions(+), 1 deletions(-)
>  create mode 100644 drivers/video/omap2/displays/panel-innolux-at070tn83.c
> 
> diff --git a/drivers/video/omap2/displays/Kconfig
> b/drivers/video/omap2/displays/Kconfig
> index dfb57ee..a750662 100644
> --- a/drivers/video/omap2/displays/Kconfig
> +++ b/drivers/video/omap2/displays/Kconfig
> @@ -5,7 +5,7 @@ config PANEL_GENERIC
>          tristate "Generic Panel"
>          help
>  	  Generic panel driver.
> -	  Used for DVI output for Beagle and OMAP3 SDP.
> +	  Used for DVI output for Beagle, Devkit8000 and OMAP3 SDP.
[Hiremath, Vaibhav] I think we should get rid of EMV's here, since as we are mentioning here it is Generic output and also this is being used on OMAP3EVM, AM3517EVM and many others.

I would suggest to mention only "Used for OMAP3 DVI output"

> 
>  config PANEL_SHARP_LS037V7DW01
>          tristate "Sharp LS037V7DW01 LCD Panel"
> @@ -19,6 +19,12 @@ config PANEL_SHARP_LQ043T1DG01
>          help
>            LCD Panel used in TI's OMAP3517 EVM boards
> 
> +config PANEL_INNOLUX_AT070TN83
> +	tristate "Innolux AT070TN83 LCD Panel"
> +	depends on OMAP2_DSS
> +	help
> +	 LCD Panel used in TimLL's Devkit8000
> +
>  config PANEL_TAAL
>          tristate "Taal DSI Panel"
>          depends on OMAP2_DSS_DSI
> diff --git a/drivers/video/omap2/displays/Makefile
> b/drivers/video/omap2/displays/Makefile
> index e2bb321..fe3ae8d 100644
> --- a/drivers/video/omap2/displays/Makefile
> +++ b/drivers/video/omap2/displays/Makefile
> @@ -5,3 +5,4 @@ obj-$(CONFIG_PANEL_SHARP_LQ043T1DG01) += panel-sharp-
> lq043t1dg01.o
>  obj-$(CONFIG_PANEL_TAAL) += panel-taal.o
>  obj-$(CONFIG_PANEL_TOPPOLY_TDO35S) += panel-toppoly-tdo35s.o
>  obj-$(CONFIG_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
> +obj-$(CONFIG_PANEL_INNOLUX_AT070TN83) += panel-innolux-at070tn83.o
> diff --git a/drivers/video/omap2/displays/panel-innolux-at070tn83.c
> b/drivers/video/omap2/displays/panel-innolux-at070tn83.c
> new file mode 100644
> index 0000000..1ef14cd
> --- /dev/null
> +++ b/drivers/video/omap2/displays/panel-innolux-at070tn83.c
> @@ -0,0 +1,154 @@
> +/*
> + * LCD panel driver for Innolux AT70TN83
> + *
> + * Copyright (C) 2010 Thomas Weber <weber@xxxxxxxxxxxxx>
> + *
> + * 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/device.h>
> +#include <linux/regulator/consumer.h>
[Hiremath, Vaibhav] You can remove this.

> +#include <linux/err.h>
> +
> +#include <plat/display.h>
> +
> +static struct omap_video_timings innolux_at_timings = {
> +	.x_res		= 800,
> +	.y_res		= 480,
> +
> +	.pixel_clock	= 40000,
> +
> +	.hsw		= 48,
> +	.hfp		= 1,
> +	.hbp		= 1,
> +
> +	.vsw		= 3,
> +	.vfp		= 12,
> +	.vbp		= 25,
> +};
> +
> +static int innolux_at_panel_power_on(struct omap_dss_device *dssdev)
> +{
> +	int r;
> +
> +	r = omapdss_dpi_display_enable(dssdev);
> +	if (r)
> +		goto err0;
[Hiremath, Vaibhav] You can directly return from here. Just do

if (r)
	Return r;

> +
> +	if (dssdev->platform_enable) {
> +		r = dssdev->platform_enable(dssdev);
> +		if (r)
> +			goto err1;
> +	}
> +
[Hiremath, Vaibhav] Here also you can implement something,


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

	return r;

You can get rid of goto's completely.

Thanks,
Vaibhav

> +	return 0;
> +err1:
> +	omapdss_dpi_display_disable(dssdev);
> +err0:
> +	return r;
> +}
> +
> +static void innolux_at_panel_power_off(struct omap_dss_device *dssdev)
> +{
> +	if (dssdev->platform_disable)
> +		dssdev->platform_disable(dssdev);
> +
> +	omapdss_dpi_display_disable(dssdev);
> +
> +}
> +
> +static int innolux_at_panel_probe(struct omap_dss_device *dssdev)
> +{
> +	dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
> +		OMAP_DSS_LCD_IHS;
> +	dssdev->panel.acb = 0x28;
> +	dssdev->panel.timings = innolux_at_timings;
> +
> +	return 0;
> +}
> +
> +static void innolux_at_panel_remove(struct omap_dss_device *dssdev)
> +{
> +}
> +
> +static int innolux_at_panel_enable(struct omap_dss_device *dssdev)
> +{
> +	int r = 0;
> +
> +	r = innolux_at_panel_power_on(dssdev);
> +	if (r)
> +		return r;
> +
> +	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
> +
> +	return 0;
> +}
> +
> +static void innolux_at_panel_disable(struct omap_dss_device *dssdev)
> +{
> +	innolux_at_panel_power_off(dssdev);
> +
> +	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
> +}
> +
> +static int innolux_at_panel_suspend(struct omap_dss_device *dssdev)
> +{
> +	innolux_at_panel_power_off(dssdev);
> +	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
> +	return 0;
> +}
> +
> +static int innolux_at_panel_resume(struct omap_dss_device *dssdev)
> +{
> +	int r = 0;
> +
> +	r = innolux_at_panel_power_on(dssdev);
> +
> +	if (r)
> +		return r;
> +
> +	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
> +
> +	return 0;
> +}
> +
> +static struct omap_dss_driver innolux_at_driver = {
> +	.probe		= innolux_at_panel_probe,
> +	.remove		= innolux_at_panel_remove,
> +
> +	.enable		= innolux_at_panel_enable,
> +	.disable	= innolux_at_panel_disable,
> +	.suspend	= innolux_at_panel_suspend,
> +	.resume		= innolux_at_panel_resume,
> +
> +	.driver         = {
> +		.name   = "innolux_at_panel",
> +		.owner  = THIS_MODULE,
> +	},
> +};
> +
> +static int __init innolux_at_panel_drv_init(void)
> +{
> +	return omap_dss_register_driver(&innolux_at_driver);
> +}
> +
> +static void __exit innolux_at_panel_drv_exit(void)
> +{
> +	omap_dss_unregister_driver(&innolux_at_driver);
> +}
> +
> +module_init(innolux_at_panel_drv_init);
> +module_exit(innolux_at_panel_drv_exit);
> +MODULE_LICENSE("GPL");
> --
> 1.6.4.4
> 
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