On Wed, 8 Feb 2017 16:20:56 +0530
Vidya Srinivas <vidya.srinivas@xxxxxxxxx> wrote:
> From: Uma Shankar <uma.shankar@xxxxxxxxx>
>
> Disable device ready before MIPI port shutdown command.
> This helps to avoid mipi split screen issues.
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
Reviewed-by: Bob Paauwe <bob.j.paauwe@xxxxxxxxx>
> ---
> 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 808158f..12aeee1 100644
> --- a/drivers/gpu/drm/i915/intel_dsi.c
> +++ b/drivers/gpu/drm/i915/intel_dsi.c
> @@ -603,6 +603,8 @@ 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;
>
> @@ -610,6 +612,15 @@ 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)
--
--
Bob Paauwe
Bob.J.Paauwe@xxxxxxxxx
IOTG / PED Software Organization
Intel Corp. Folsom, CA
(916) 356-6193
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