On Wed, Jun 13, 2018 at 08:07:09PM +0300, Imre Deak wrote:
> On ICL for setting the HDMI infoframe the pipe clock needs to be
> enabled, otherwise accessing the VIDEO_DIP_CTL register will hang the
> machine.
> 
> Cc: Vandita Kulkarni <[email protected]>
> Cc: Paulo Zanoni <[email protected]>
> Cc: Ville Syrjälä <[email protected]>
> Signed-off-by: Imre Deak <[email protected]>

Looks safe to me.

Reviewed-by: Ville Syrjälä <[email protected]>

> ---
>  drivers/gpu/drm/i915/intel_ddi.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c 
> b/drivers/gpu/drm/i915/intel_ddi.c
> index bfa451ac9f09..08336a66d5c6 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -2958,11 +2958,11 @@ static void intel_ddi_pre_enable_hdmi(struct 
> intel_encoder *encoder,
>       if (IS_GEN9_BC(dev_priv))
>               skl_ddi_set_iboost(encoder, level, INTEL_OUTPUT_HDMI);
>  
> +     intel_ddi_enable_pipe_clock(crtc_state);
> +
>       intel_dig_port->set_infoframes(&encoder->base,
>                                      crtc_state->has_infoframe,
>                                      crtc_state, conn_state);
> -
> -     intel_ddi_enable_pipe_clock(crtc_state);
>  }
>  
>  static void intel_ddi_pre_enable(struct intel_encoder *encoder,
> @@ -3070,13 +3070,13 @@ static void intel_ddi_post_disable_hdmi(struct 
> intel_encoder *encoder,
>       struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
>       struct intel_hdmi *intel_hdmi = &dig_port->hdmi;
>  
> +     dig_port->set_infoframes(&encoder->base, false,
> +                              old_crtc_state, old_conn_state);
> +
>       intel_ddi_disable_pipe_clock(old_crtc_state);
>  
>       intel_disable_ddi_buf(encoder);
>  
> -     dig_port->set_infoframes(&encoder->base, false,
> -                              old_crtc_state, old_conn_state);
> -
>       intel_display_power_put(dev_priv, dig_port->ddi_io_power_domain);
>  
>       intel_ddi_clk_disable(encoder);
> -- 
> 2.13.2

-- 
Ville Syrjälä
Intel
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