drm/i915/debugfs: Print sink PSR status
IGT tests could be improved with sink status, knowing for sure that hardware have activate or exit PSR. v3: Reading i915_edp_psr_status was causing PSR to exit but now with 'drm/i915/psr: Prevent PSR exit when a non-pipe related register is written' it is fixed. Reviewed-by:Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
José Roberto de Souza <jose.souza@intel.com> Signed-off-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180425212334.21109-3-jose.souza@intel.com
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