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| author | Andrew Bresticker <abrestic@chromium.org> | 2014-04-22 04:09:10 +0530 |
|---|---|---|
| committer | Inki Dae <daeinki@gmail.com> | 2014-06-02 02:07:05 +0900 |
| commit | b8b52471e87a713e61d26fa2f546fda0fb04e8fd (patch) | |
| tree | e9bdacf10aec08ea529220fbe76c43c0a2e1535f /Documentation | |
| parent | fbc2063d7b76d58e47a74b845148b3a9db052f16 (diff) | |
| download | op-kernel-dev-b8b52471e87a713e61d26fa2f546fda0fb04e8fd.zip op-kernel-dev-b8b52471e87a713e61d26fa2f546fda0fb04e8fd.tar.gz | |
drm/exynos: dp: support hotplug detection via GPIO
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@chromium.org>
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/video/exynos_dp.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt index 57ccdde..53dbccf 100644 --- a/Documentation/devicetree/bindings/video/exynos_dp.txt +++ b/Documentation/devicetree/bindings/video/exynos_dp.txt @@ -62,6 +62,10 @@ Optional properties for dp-controller: -hsync-active-high: HSYNC polarity configuration. High if defined, Low if not defined + -samsung,hpd-gpio: + Hotplug detect GPIO. + Indicates which GPIO should be used for hotplug + detection Example: |
