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Commit c9f9ccc1 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/lvds: Remove busy wait for powering up the panel. 



We just assume that it will happen in a timely manner. A variant of this
patch was first written and tested by Arjan van de Van.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 77d07fd9

drivers/gpu/drm/i915/intel_lvds.c

+1 −5
Original line number Diff line number Diff line
@@ -84,17 +84,13 @@ static void intel_lvds_set_power(struct drm_device *dev, bool on) 
	if (on) {

		I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);

		I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);

		if (wait_for(I915_READ(status_reg) & PP_ON, 1000))

			DRM_ERROR("timed out waiting to enable LVDS pipe");



		intel_panel_set_backlight(dev, dev_priv->backlight_level);

	} else {

		intel_panel_set_backlight(dev, 0);



		I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);

		I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);

		POSTING_READ(lvds_reg);

	}

	POSTING_READ(lvds_reg);

}



static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)