2014-09-04 8:27 GMT-03:00 Damien Lespiau <damien.lespiau@xxxxxxxxx>:
> From: Vandana Kannan <vandana.kannan@xxxxxxxxx>
>
> The eDP WA to stop link train based on port type is for HSW/BDW, not
> required for SKL+.
> Suggested by Satheesh
>
> v2: Simplified the check befoe stop_link_train. Suggested by Satheesh.
>
> v3: stop_link_train need not be called from intel_enable_ddi for gen >= 9
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
>
> Suggested-by: Satheeshakrishna M <satheeshakrishna.m@xxxxxxxxx>
> Reviewed-by: Satheeshakrishna M <satheeshakrishna.m@xxxxxxxxx>
> Signed-off-by: Vandana Kannan <vandana.kannan@xxxxxxxxx>
> Cc: Satheeshakrishna M <satheeshakrishna.m@xxxxxxxxx>
> Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_ddi.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index f68e04c..2561b40 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1491,7 +1491,7 @@ static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
> intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
> intel_dp_start_link_train(intel_dp);
> intel_dp_complete_link_train(intel_dp);
> - if (port != PORT_A)
> + if (port != PORT_A || INTEL_INFO(dev)->gen >= 9)
> intel_dp_stop_link_train(intel_dp);
> } else if (type == INTEL_OUTPUT_HDMI) {
> struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
> @@ -1567,7 +1567,7 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)
> } else if (type == INTEL_OUTPUT_EDP) {
> struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
>
> - if (port == PORT_A)
> + if (port == PORT_A && INTEL_INFO(dev)->gen < 9)
> intel_dp_stop_link_train(intel_dp);
>
> intel_edp_backlight_on(intel_dp);
> --
> 1.8.3.1
>
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--
Paulo Zanoni
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