From 339023ec342a63f885d8100eafe84dac515a0c8f Mon Sep 17 00:00:00 2001 From: Shobhit Kumar Date: Wed, 9 Apr 2014 13:59:34 +0530 Subject: [PATCH] drm/i915: Panel commands can be sent only when clock is in LP11 Signed-off-by: Shobhit Kumar Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dsi.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) 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) -- 2.20.1