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drm/i915/bxt: Disable device ready before shutdown command
Disable device ready before MIPI port shutdown command. This helps to avoid mipi split screen issues. Signed-off-by: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com> Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1486551058-22596-8-git-send-email-vidya.srinivas@intel.com
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@ -612,6 +612,8 @@ static void intel_dsi_pre_disable(struct intel_encoder *encoder,
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struct intel_crtc_state *old_crtc_state,
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struct drm_connector_state *old_conn_state)
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{
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struct drm_device *dev = encoder->base.dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
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enum port port;
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@ -619,6 +621,15 @@ static void intel_dsi_pre_disable(struct intel_encoder *encoder,
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intel_panel_disable_backlight(intel_dsi->attached_connector);
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/*
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* Disable Device ready before the port shutdown in order
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* to avoid split screen
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*/
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if (IS_BROXTON(dev_priv)) {
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for_each_dsi_port(port, intel_dsi->ports)
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I915_WRITE(MIPI_DEVICE_READY(port), 0);
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}
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if (is_vid_mode(intel_dsi)) {
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/* Send Shutdown command to the panel in LP mode */
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for_each_dsi_port(port, intel_dsi->ports)
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