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authorThierry Reding <treding@nvidia.com>2014-02-28 16:57:34 +0100
committerThierry Reding <treding@nvidia.com>2014-06-05 23:09:21 +0200
commitfb50a116bbbc25c7c11e00e6d10a53b9ec3c38e8 (patch)
tree8f37152a6ed2b59aa407245a7dffa3d509a65919 /Documentation
parent0444c0ff3cef9f99b19bbb1f0b3f5d7a22daab25 (diff)
drm/tegra: hdmi - Add connector supply support
Revert commit 18ebc0f404d5 "drm/tegra: hdmi: Enable VDD earlier for hotplug/DDC" and instead add a new supply for the +5V pin on the HDMI connector. The vdd-supply property refers to the regulator that supplies the AVDD_HDMI input on Tegra, rather than the +5V HDMI connector pin. This was never a problem before, because all boards had that pin hooked up to a regulator that was always on. Starting with Dalmore and continuing with Venice2, the +5V pin is controllable via a GPIO. For reasons unknown, the GPIO ended up as the controlling GPIO of the AVDD_HDMI supply in the Dalmore and Venice2 DTS files. But that's not correct. Instead, a separate supply must be introduced so that the +5V pin can be controlled separately from the supplies that feed the HDMI block within Tegra. A new hdmi-supply property is introduced that takes the place of the vdd-supply and vdd-supply is only enabled when HDMI is enabled rather than all the time. Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt b/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt
index efa8b8451f93..f13a6b8263d3 100644
--- a/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt
+++ b/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt
@@ -136,6 +136,7 @@ of the following host1x client modules:
- compatible: "nvidia,tegra<chip>-hdmi"
- reg: Physical base address and length of the controller's registers.
- interrupts: The interrupt outputs from the controller.
+ - hdmi-supply: supply for the +5V HDMI connector pin
- vdd-supply: regulator for supply voltage
- pll-supply: regulator for PLL
- clocks: Must contain an entry for each entry in clock-names.