drm/i915/psr: Control PSR interrupts via debugfs
Interrupts other than the one for AUX errors are required only for debug, so unmask them via debugfs when the user requests debug. User can make such a request with echo 1 > <DEBUG_FS>/dri/0/i915_edp_psr_debug There are no locks to serialize PSR debug enabling from irq_postinstall() and debugfs for simplicity. As irq_postinstall() is called only during module initialization/resume and IGT subtests aren't expected to modify PSR debug at those times, we should be safe. v2: Unroll loops (Ville) Avoid resetting error mask bits. v3: Unmask interrupts in postinstall() if debug was still enabled. Avoid RMW (Ville) v4: Avoid extra IMR write introduced in the previous version.(Jose) Style changes, renames (Jose). Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Reviewed-by: Jose Roberto de Souza <jose.souza@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180405013717.24254-1-dhinakaran.pandiyan@intel.com
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