On 2019-08-23 at 01:20:37 -0700, Lucas De Marchi wrote:
> From: José Roberto de Souza <[email protected]>
>
> Now that is allowed to have PSR enabled in any port from BDW+, lets
> guard intel_psr_init_dpcd() against multiple eDP panels and warn about
> it.
>
> For now we will keep just one instance of PSR.
Looks good to me.
>
> Cc: Dhinakaran Pandiyan <[email protected]>
> Cc: Rodrigo Vivi <[email protected]>
> Signed-off-by: José Roberto de Souza <[email protected]>
> Signed-off-by: Lucas De Marchi <[email protected]>
Reviewed-by: Anshuman Gupta <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_psr.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index 0172b82858d9..cf07ab3d9280 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -249,6 +249,11 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp)
> struct drm_i915_private *dev_priv =
> to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
>
> + if (dev_priv->psr.dp) {
> + DRM_WARN("More than one eDP panel found, PSR support should be
> extend\n");
> + return;
> + }
> +
> drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp->psr_dpcd,
> sizeof(intel_dp->psr_dpcd));
>
> @@ -271,7 +276,6 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp)
> dev_priv->psr.sink_sync_latency =
> intel_dp_get_sink_sync_latency(intel_dp);
>
> - WARN_ON(dev_priv->psr.dp);
> dev_priv->psr.dp = intel_dp;
>
> if (INTEL_GEN(dev_priv) >= 9 &&
> --
> 2.23.0
>
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