From: Uma Shankar <uma.shan...@intel.com>
Disable device ready before MIPI port shutdown command.
This helps to avoid mipi split screen issues.
Signed-off-by: Uma Shankar <uma.shan...@intel.com>
---
drivers/gpu/drm/i915/intel_dsi.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 88a17e9..632d87e 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -591,6 +591,8 @@ 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;
@@ -598,6 +600,15 @@ 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)
--
1.9.1
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