4.15-stable review patch. If anyone has any objections, please let me know.
------------------ From: Maarten Lankhorst <maarten.lankho...@linux.intel.com> 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.lankho...@linux.intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104172 Link: https://patchwork.freedesktop.org/patch/msgid/20180116155324.75120-1-maarten.lankho...@linux.intel.com Fixes: bc87229f323e ("drm/i915/skl: enable PC9/10 power states during suspend-to-idle") Cc: Nivedita Swaminathan <nivedita.swaminat...@intel.com> Cc: Imre Deak <imre.d...@intel.com> Cc: Patrik Jakobsson <patrik.jakobs...@linux.intel.com> Cc: Jani Nikula <jani.nik...@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.v...@intel.com> Cc: <sta...@vger.kernel.org> # v4.5+ Reviewed-by: Imre Deak <imre.d...@intel.com> (cherry picked from commit ac25dfed15d470d7f23dd817e965b54aa3f94a1e) Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- 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 @@ -1827,6 +1827,8 @@ static int i915_drm_resume_early(struct if (IS_GEN9_LP(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); i915_gem_sanitize(dev_priv);
