Re: [PATCH 10/12] drm/i915: Disable SDVO port after the pipe on PCH platforms

[Jesse Barnes <jbarnes@virtuousgeek.org>]

On 05/05/2015 07:17 AM, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_sdvo.c | 25 +++++++++++++++++--------
>  1 file changed, 17 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
> index 4a87691..d24ef75 100644
> --- a/drivers/gpu/drm/i915/intel_sdvo.c
> +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> @@ -1465,6 +1465,15 @@ static void intel_disable_sdvo(struct intel_encoder *encoder)
>  	}
>  }
>  
> +static void pch_disable_sdvo(struct intel_encoder *encoder)
> +{
> +}
> +
> +static void pch_post_disable_sdvo(struct intel_encoder *encoder)
> +{
> +	intel_disable_sdvo(encoder);
> +}
> +
>  static void intel_enable_sdvo(struct intel_encoder *encoder)
>  {
>  	struct drm_device *dev = encoder->base.dev;
> @@ -1477,14 +1486,9 @@ static void intel_enable_sdvo(struct intel_encoder *encoder)
>  	bool success;
>  
>  	temp = I915_READ(intel_sdvo->sdvo_reg);
> -	if ((temp & SDVO_ENABLE) == 0) {
> -		/* HW workaround for IBX, we need to move the port
> -		 * to transcoder A before disabling it, so restore it here. */
> -		if (HAS_PCH_IBX(dev))
> -			temp |= SDVO_PIPE_SEL(intel_crtc->pipe);
> +	temp |= SDVO_ENABLE;
> +	intel_sdvo_write_sdvox(intel_sdvo, temp);
>  
> -		intel_sdvo_write_sdvox(intel_sdvo, temp | SDVO_ENABLE);
> -	}
>  	for (i = 0; i < 2; i++)
>  		intel_wait_for_vblank(dev, intel_crtc->pipe);
>  
> @@ -2987,7 +2991,12 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob)
>  	}
>  
>  	intel_encoder->compute_config = intel_sdvo_compute_config;
> -	intel_encoder->disable = intel_disable_sdvo;
> +	if (HAS_PCH_SPLIT(dev)) {
> +		intel_encoder->disable = pch_disable_sdvo;
> +		intel_encoder->post_disable = pch_post_disable_sdvo;
> +	} else {
> +		intel_encoder->disable = intel_disable_sdvo;
> +	}
>  	intel_encoder->pre_enable = intel_sdvo_pre_enable;
>  	intel_encoder->enable = intel_enable_sdvo;
>  	intel_encoder->get_hw_state = intel_sdvo_get_hw_state;
> 

Commit should probably have something about the hw workaround block
being superceded (assuming that block was intentional in this patch),
but either way:

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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