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drm/tegra: DPMS off/on in encoder prepare/commit 

Previously the panel and output were only enabled on encoder->dpms(). If
userspace called dpms on before doing a modeset, the driver would get into
a state where the connector had a dpms state of ON, but the encoder and output
were not enabled (because the encoder is not yet attached to the connector).
Subsequent dpms ON calls are ignored b/c the connector's state already matches
the desired state.

This patch enables/disables the panel and output on modeset as well, so we
can catch the above case.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Sean Paul 2014-10-29 15:33:35 -04:00 committed by Thierry Reding
parent dc670e49e7
commit 0bfad39671
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/tegra/output.c
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@ -157,10 +157,12 @@ static bool tegra_encoder_mode_fixup(struct drm_encoder *encoder,
static void tegra_encoder_prepare(struct drm_encoder *encoder)
{
tegra_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
}
static void tegra_encoder_commit(struct drm_encoder *encoder)
{
tegra_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
}
static void tegra_encoder_mode_set(struct drm_encoder *encoder,