[PATCH V2 1/9] drm/exynos: dp: support hotplug detection via GPIO
Jingoo Han
jg1.han at samsung.com
Tue Apr 22 00:13:54 PDT 2014
On Tuesday, April 22, 2014 7:39 AM, Ajay Kumar wrote:
>
> From: Andrew Bresticker <abrestic at chromium.org>
>
> Certain bridge chips use a GPIO to indicate the cable status instead
> of the I_DP_HPD pin. This adds an optional device-tree property,
> "samsung,hpd-gpio", to the exynos-dp controller which indicates that
> the specified GPIO should be used for hotplug detection.
> The GPIO is then set up as an edge-triggered interrupt where the
> rising edge indicates hotplug-in and the falling edge indicates hotplug-out.
>
> Signed-off-by: Andrew Bresticker <abrestic at chromium.org>
> Signed-off-by: Rahul Sharma <rahul.sharma at samsung.com>
> Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
Acked-by: Jingoo Han <jg1.han at samsung.com>
Best regards,
Jingoo Han
> ---
> Changes since V1:
> Address reiew comments from Jingoo Han
>
> .../devicetree/bindings/video/exynos_dp.txt | 4 ++
> drivers/gpu/drm/exynos/exynos_dp_core.c | 32 ++++++++++++--
> drivers/gpu/drm/exynos/exynos_dp_core.h | 1 +
> drivers/gpu/drm/exynos/exynos_dp_reg.c | 44 ++++++++++++++------
> 4 files changed, 66 insertions(+), 15 deletions(-)
[.....]
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