drm/i915: Panel commands can be sent only when clock is in LP11

Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index dfcdb1068495..d8eccda04767 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -229,6 +229,23 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
                 msleep(2);
         }
 
+        /* Panel commands can be sent when clock is in LP11 */
+        I915_WRITE(MIPI_DEVICE_READY(pipe), 0x0);
+
+        temp = I915_READ(MIPI_CTRL(pipe));
+        temp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
+        I915_WRITE(MIPI_CTRL(pipe), temp |
+                        intel_dsi->escape_clk_div <<
+                        ESCAPE_CLOCK_DIVIDER_SHIFT);
+
+        I915_WRITE(MIPI_EOT_DISABLE(pipe), CLOCKSTOP);
+
+        temp = I915_READ(MIPI_DSI_FUNC_PRG(pipe));
+        temp &= ~VID_MODE_FORMAT_MASK;
+        I915_WRITE(MIPI_DSI_FUNC_PRG(pipe), temp);
+
+        I915_WRITE(MIPI_DEVICE_READY(pipe), 0x1);
+
         /* if disable packets are sent before sending shutdown packet then in
          * some next enable sequence send turn on packet error is observed */
         if (intel_dsi->dev.dev_ops->disable)