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drm/tegra: Disable outputs for power-saving

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When an output is disabled, its DPMS mode is usually set to off. Instead
of only disabling the panel (if one is attached), turn the output off
entirely to save more power.

HDMI doesn't have any panels attached, so it previously didn't save any
power at all. With this commit, however, the complete HDMI interface
will be turned off, therefore allowing an attached monitor to go into a
standby mode.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2013-10-29 16:03:03 +01:00
parent 365765fc29
commit b5190022f7
1 changed files with 6 additions and 5 deletions
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11
drivers/gpu/drm/tegra/output.c
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@ -130,11 +130,12 @@ static void tegra_encoder_dpms(struct drm_encoder *encoder, int mode)
struct tegra_output *output = encoder_to_output(encoder);
struct drm_panel *panel = output->panel;
if (panel && panel->funcs) {
if (mode != DRM_MODE_DPMS_ON)
drm_panel_disable(panel);
else
drm_panel_enable(panel);
if (mode != DRM_MODE_DPMS_ON) {
drm_panel_disable(panel);
tegra_output_disable(output);
} else {
tegra_output_enable(output);
drm_panel_enable(panel);
}
}