From 2a8408e5372503fe4df9b5bbb49fb3af0c212c67 Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@intel.com>
Date: Tue, 3 Oct 2017 12:51:58 +0300
Subject: [PATCH] drm/i915/cnl: Reprogram DMC firmware after S3/S4 resume
Git-commit: 2a8408e5372503fe4df9b5bbb49fb3af0c212c67
Patch-mainline: v4.14-rc4
References: FATE#322643 bsc#1055900
No-fix: 57522c4c87de20d8f7ad4e142a3a4334066d55ff

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
(cherry picked from commit 57522c4c87de20d8f7ad4e142a3a4334066d55ff)

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_runtime_pm.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -2782,6 +2782,9 @@ static void cnl_display_core_init(struct
 
 	/* 6. Enable DBUF */
 	gen9_dbuf_enable(dev_priv);
+
+	if (resume && dev_priv->csr.dmc_payload)
+		intel_csr_load_program(dev_priv);
 }
 
 #undef CNL_PROCMON_IDX