4.15-stable review patch. If anyone has any objections, please let me know.
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From: Maarten Lankhorst maarten.lankhorst@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.lankhorst@linux.intel.com Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104172 Link: https://patchwork.freedesktop.org/patch/msgid/20180116155324.75120-1-maarten... Fixes: bc87229f323e ("drm/i915/skl: enable PC9/10 power states during suspend-to-idle") Cc: Nivedita Swaminathan nivedita.swaminathan@intel.com Cc: Imre Deak imre.deak@intel.com Cc: Patrik Jakobsson patrik.jakobsson@linux.intel.com Cc: Jani Nikula jani.nikula@linux.intel.com Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: stable@vger.kernel.org # v4.5+ Reviewed-by: Imre Deak imre.deak@intel.com (cherry picked from commit ac25dfed15d470d7f23dd817e965b54aa3f94a1e) Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@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);