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Commit 2095f9fc authored by Shobhit Kumar's avatar Shobhit Kumar Committed by Daniel Vetter
Browse files

drm/i915: Program Rcomp and band gap reset everytime we resume from power gate 



Signed-off-by: default avatarShobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 113a0476

drivers/gpu/drm/i915/intel_dsi.c

+9 −3
Original line number Diff line number Diff line
@@ -110,6 +110,15 @@ static void intel_dsi_device_ready(struct intel_encoder *encoder) 


	DRM_DEBUG_KMS("\n");



	mutex_lock(&dev_priv->dpio_lock);

	/* program rcomp for compliance, reduce from 50 ohms to 45 ohms

	 * needed everytime after power gate */

	vlv_flisdsi_write(dev_priv, 0x04, 0x0004);

	mutex_unlock(&dev_priv->dpio_lock);



	/* bandgap reset is needed after everytime we do power gate */

	band_gap_reset(dev_priv);



	val = I915_READ(MIPI_PORT_CTRL(pipe));

	I915_WRITE(MIPI_PORT_CTRL(pipe), val | LP_OUTPUT_HOLD);

	usleep_range(1000, 1500);
@@ -379,9 +388,6 @@ static void intel_dsi_mode_set(struct intel_encoder *intel_encoder) 


	DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));



	/* XXX: Location of the call */

	band_gap_reset(dev_priv);



	/* escape clock divider, 20MHz, shared for A and C. device ready must be

	 * off when doing this! txclkesc? */

	tmp = I915_READ(MIPI_CTRL(0));