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drm/i915/cnl: Reprogram DMC firmware after S3/S4 resume
author
Imre Deak
<imre.deak@intel.com>
Tue, 3 Oct 2017 09:51:58 +0000
(12:51 +0300)
committer
Rodrigo Vivi
<rodrigo.vivi@intel.com>
Wed, 4 Oct 2017 22:49:31 +0000
(15:49 -0700)
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>
drivers/gpu/drm/i915/intel_runtime_pm.c
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diff --git
a/drivers/gpu/drm/i915/intel_runtime_pm.c
b/drivers/gpu/drm/i915/intel_runtime_pm.c
index b66d8e136aa37c3b72d072312d0f06d141223237..b3a087cb0860d99f429719077ae795cf734a0b9e 100644
(file)
--- 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 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);
}
#undef CNL_PROCMON_IDX