drm/tegra: hdmi - Add connector supply support

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Revert commit 18ebc0f404 "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>

...

This commit is contained in:

Thierry Reding 2014-02-28 16:57:34 +01:00

parent 0444c0ff3c

commit fb50a116bb

2 changed files with 24 additions and 9 deletions

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1

Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt

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32

drivers/gpu/drm/tegra/hdmi.c

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