From: Jani Nikula Date: Fri, 20 Sep 2013 13:42:17 +0000 (+0300) Subject: drm/i915/dp: read DPCD PSR capability only on eDP X-Git-Tag: v3.13-rc1~69^2~81^2~75 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=50003939b5a45df44b3b4bd1ccd46e3c50aa5e65;p=profile%2Fivi%2Fkernel-x86-ivi.git drm/i915/dp: read DPCD PSR capability only on eDP Reduce AUX transactions for non-eDP. Signed-off-by: Jani Nikula Reviewed-by: Todd Previte Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 7823a1b..5a937fc 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2686,11 +2686,14 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp) /* Check if the panel supports PSR */ memset(intel_dp->psr_dpcd, 0, sizeof(intel_dp->psr_dpcd)); - intel_dp_aux_native_read_retry(intel_dp, DP_PSR_SUPPORT, - intel_dp->psr_dpcd, - sizeof(intel_dp->psr_dpcd)); - if (is_edp_psr(intel_dp)) - DRM_DEBUG_KMS("Detected EDP PSR Panel.\n"); + if (is_edp(intel_dp)) { + intel_dp_aux_native_read_retry(intel_dp, DP_PSR_SUPPORT, + intel_dp->psr_dpcd, + sizeof(intel_dp->psr_dpcd)); + if (is_edp_psr(intel_dp)) + DRM_DEBUG_KMS("Detected EDP PSR Panel.\n"); + } + if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT)) return true; /* native DP sink */