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drm/i915/cnl: Reprogram DMC firmware after S3/S4 resume

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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.srivatsa@intel.com>
Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171003095159.711-1-imre.deak@intel.com
This commit is contained in:
Imre Deak 2017-10-03 12:51:58 +03:00
parent 213f1bd035
commit 57522c4c87
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/intel_runtime_pm.c
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@ -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)