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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [HSW/IVB] Blank screen after resume with HSW"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101865#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [HSW/IVB] Blank screen after resume with HSW"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101865">bug 101865</a>
from <span class="vcard"><a class="email" href="mailto:nutrinfnon@gmx.com" title="nutrinfnon@gmx.com">nutrinfnon@gmx.com</a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=135095" name="attach_135095" title="test 4.14.0-rc6">attachment 135095</a> <a href="attachment.cgi?id=135095&action=edit" title="test 4.14.0-rc6">[details]</a></span>
test 4.14.0-rc6
Hello,
among the latest S3/S4 patches are:
2017-10-04 drm/i915/cnl: Reprogram DMC firmware after S3/S4 resume
--- 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);
}
2017-10-04 drm/i915/cnl: Reprogram DMC firmware after S3/S4 resume
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c
b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 7933d1b..3791c3f 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);
}
These patches are already merged in linux-4.14.0-rc6, so I tried it.
My test with 4.14.0-rc6 still shows the presence of the problem, blank screen
after resume.
In attach dmesg output.
Thanks.</pre>
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