4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> commit d13a8479f3584613b6aacbb793eae64578b8f69a upstream. intel_power_domains_init_hw() calls set_init_power, but when using runtime power management this call is skipped. This prevents hw readout from taking place. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104172 Link: https://patchwork.freedesktop.org/patch/msgid/20180116155324.75120-1-maarten.lankhorst@xxxxxxxxxxxxxxx Fixes: bc87229f323e ("drm/i915/skl: enable PC9/10 power states during suspend-to-idle") Cc: Nivedita Swaminathan <nivedita.swaminathan@xxxxxxxxx> Cc: Imre Deak <imre.deak@xxxxxxxxx> Cc: Patrik Jakobsson <patrik.jakobsson@xxxxxxxxxxxxxxx> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> # v4.5+ Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx> (cherry picked from commit ac25dfed15d470d7f23dd817e965b54aa3f94a1e) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/i915_drv.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1703,6 +1703,8 @@ static int i915_drm_resume_early(struct if (IS_BROXTON(dev_priv) || !(dev_priv->suspended_to_idle && dev_priv->csr.dmc_payload)) intel_power_domains_init_hw(dev_priv, true); + else + intel_display_set_init_power(dev_priv, true); enable_rpm_wakeref_asserts(dev_priv);