On 05/05/2015 07:17 AM, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> IBX can have problems with the first write to the port register getting
> masked when enabling the port. We are trying to apply the workaround
> also when disabling the port where it's not needed, and we also try
> to apply it for CPT/PPT as well which don't need it. Just kill it.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_hdmi.c | 8 --------
> 1 file changed, 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 72fce34..308015e 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1132,14 +1132,6 @@ static void intel_disable_hdmi(struct intel_encoder *encoder)
> I915_WRITE(intel_hdmi->hdmi_reg, temp);
> POSTING_READ(intel_hdmi->hdmi_reg);
>
> - /* HW workaround, need to write this twice for issue that may result
> - * in first write getting masked.
> - */
> - if (HAS_PCH_SPLIT(dev)) {
> - I915_WRITE(intel_hdmi->hdmi_reg, temp);
> - POSTING_READ(intel_hdmi->hdmi_reg);
> - }
> -
> if (IS_CHERRYVIEW(dev))
> chv_powergate_phy_lanes(encoder, 0xf);
>
>
Reviewed-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
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