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>

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index dfcdb1068495024de0fd7bf66495f44affd4d0e6..d8eccda04767012eaf3a041e0e749415e84b88cd 100644 (file)
--- 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)