[Maverick] SRU: Fix DVI for Beagle xM rev A3

[Leann Ogasawara]

On Thu, 2010-10-21 at 12:38 -0200, Ricardo Salveti de Araujo wrote:
> SRU Justification:
> 
> Impact: With BeagleBoard xM rev A3 the DVI_PU is now used and connected to GPIO
> 2 on TPS65950. Without setting up this GPIO the DVI will be off, and the user
> will be unable to install and use the distro.
> 
> Fix: The problem is fixed by setting up the GPIO 2 on TPS65950 for when running
> at Beagle xM. There's no problem when setting this GPIO in previous xM revisions
> as it's not connected. For more details please see
> http://beagleboard.org/hardware/design.
> 
> Testcase: When booting with current kernel on xM A3 you should be unable to use
> the DVI. After applying the fix it should work the same way as with previous xM revisions.
> 
> BugLink: https://bugs.launchpad.net/bugs/663642
> 
> From: Robert Nelson <robertcnelson at gmail.com>
> Date: Mon, 18 Oct 2010 15:02:35 -0500
> Subject: [PATCH] UBUNTU: SAUCE: OMAP3: beagle: use GPIO2 on the xM A3 to turn DVI on
> 
> With BeagleBoard xM rev A3 the DVI_PU is now used and connected to GPIO
> 2 on TPS65950. This patch enable the correct GPIO pin in order to have a
> working DVI again.
> 
> This patch is not yet upstream because it depends on the xM check
> patches that are still not upstream.
> 
> BugLink: https://bugs.launchpad.net/bugs/663642
> 
> Signed-off-by: Robert Nelson <robertcnelson at gmail.com>
> Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti at canonical.com>
> ---
>  arch/arm/mach-omap2/board-omap3beagle.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
> index 94cb19c..81b19e3 100644
> --- a/arch/arm/mach-omap2/board-omap3beagle.c
> +++ b/arch/arm/mach-omap2/board-omap3beagle.c
> @@ -306,6 +306,10 @@ static int beagle_twl_gpio_setup(struct device *dev,
>         if (cpu_is_omap3630()) {
>                 gpio_request(gpio + 1, "nDVI_PWR_EN");
>                 gpio_direction_output(gpio + 1, 0);
> +
> +               /* On the xM A3 DVI_PUP was moved to an empty GPIO pin on the TPS65950 */
> +               gpio_request(gpio + 2, "DVI_PUP");
> +               gpio_direction_output(gpio + 2, 1);
>   
>                 /* TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, active low) */
>                 gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
> -- 
> 1.7.1

Per comments in the bug report, the patch has been tested and confirmed
to resolve the issue.

Acked-by: Leann Ogasawara <leann.ogasawara at canonical.com>