Commit b5190022 authored Oct 29, 2013 by Thierry Reding

drm/tegra: Disable outputs for power-saving



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>

parent 365765fc

drivers/gpu/drm/tegra/output.c

+6 −5

Original line number	Diff line number	Diff line
		@@ -130,10 +130,11 @@ 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)
		if (mode != DRM_MODE_DPMS_ON) {
		drm_panel_disable(panel);
		else
		tegra_output_disable(output);
		} else {
		tegra_output_enable(output);
		drm_panel_enable(panel);
		}
		}