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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
This commit is contained in:
Uma Shankar 2017-02-08 16:20:56 +05:30 committed by Jani Nikula
parent eba4daf0dc
commit bbdf0b2ff3
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/intel_dsi.c
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@ -612,6 +612,8 @@ static void intel_dsi_pre_disable(struct intel_encoder *encoder,
struct intel_crtc_state *old_crtc_state,
struct drm_connector_state *old_conn_state)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
@ -619,6 +621,15 @@ static void intel_dsi_pre_disable(struct intel_encoder *encoder,
intel_panel_disable_backlight(intel_dsi->attached_connector);
/*
* Disable Device ready before the port shutdown in order
* to avoid split screen
*/
if (IS_BROXTON(dev_priv)) {
for_each_dsi_port(port, intel_dsi->ports)
I915_WRITE(MIPI_DEVICE_READY(port), 0);
}
if (is_vid_mode(intel_dsi)) {
/* Send Shutdown command to the panel in LP mode */
for_each_dsi_port(port, intel_dsi->ports)