The DMC firmware program memory is lost after S3/S4 system suspend, so we need to reprogram it during resume.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103070 Fixes: cebfcead63de ("drm/i915/DMC/CNL: Load DMC on CNL") Cc: Anusha Srivatsa <anusha.sriva...@intel.com> Cc: Animesh Manna <animesh.ma...@intel.com> Cc: Rodrigo Vivi <rodrigo.v...@intel.com> Signed-off-by: Imre Deak <imre.d...@intel.com> --- drivers/gpu/drm/i915/intel_runtime_pm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 7933d1bc6a1c..3791c3f5f56d 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -2809,6 +2809,9 @@ static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume /* 6. Enable DBUF */ gen9_dbuf_enable(dev_priv); + + if (resume && dev_priv->csr.dmc_payload) + intel_csr_load_program(dev_priv); } static void cnl_display_core_uninit(struct drm_i915_private *dev_priv) -- 2.13.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
