Re: [PATCH 03/11] drm/i915: Use HAS_PSR to avoid unecessary interactions.

[Vijay Purushothaman <vijay.a.purushothaman@intel.com>]

On 5/16/2014 5:43 AM, Rodrigo Vivi wrote:
> Let's be more conservative and protect platforms that don't
> support PSR from unecessary interactions.
>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
> ---
>   drivers/gpu/drm/i915/intel_dp.c | 13 ++++++++-----
>   1 file changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 34e8f7a..58537b7 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1739,11 +1739,6 @@ static bool intel_edp_psr_match_conditions(struct intel_dp *intel_dp)
>
>   	dev_priv->psr.source_ok = false;
>
> -	if (!HAS_PSR(dev)) {
> -		DRM_DEBUG_KMS("PSR not supported on this platform\n");
> -		return false;
> -	}
> -
>   	if ((intel_encoder->type != INTEL_OUTPUT_EDP) ||
>   	    (dig_port->port != PORT_A)) {
>   		DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n");
> @@ -1816,6 +1811,11 @@ void intel_edp_psr_enable(struct intel_dp *intel_dp)
>   {
>   	struct drm_device *dev = intel_dp_to_dev(intel_dp);
>
> +	if (!HAS_PSR(dev)) {
> +		DRM_DEBUG_KMS("PSR not supported on this platform\n");
> +		return;
> +	}
> +
>   	if (intel_edp_psr_match_conditions(intel_dp) &&
>   	    !intel_edp_is_psr_enabled(dev))
>   		intel_edp_psr_do_enable(intel_dp);
> @@ -1843,6 +1843,9 @@ void intel_edp_psr_update(struct drm_device *dev)
>   	struct intel_encoder *encoder;
>   	struct intel_dp *intel_dp = NULL;
>
> +	if (!HAS_PSR(dev))
> +		return;
> +
>   	list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head)
>   		if (encoder->type == INTEL_OUTPUT_EDP) {
>   			intel_dp = enc_to_intel_dp(&encoder->base);
>

Reviewed-by: Vijay Purushothaman <vijay.a.purushothaman@intel.com>