45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Satyeshwar Singh <satyeshwar.singh@intel.com>
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Date: Fri, 14 Sep 2018 16:10:17 +0800
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Subject: [PATCH] drm/i915/gvt: Don't load CSR for Dom U
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This change prevents the CSR firmware to be loaded for Dom U as
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we don't allow Dom U to control display power management settings
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and it can save time for Dom U bootup by skipping this firmware
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loading. Tests have shown this can be anywhere between 80 to 500 ms.
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Change-Id: Ic8119d69eaf01fda3082f055e306a2d6263411ed
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Signed-off-by: Satyeshwar Singh <satyeshwar.singh@intel.com>
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Reviewed-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
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Reviewed-on:
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Reviewed-by: He, Min <min.he@intel.com>
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Reviewed-by: Jiang, Fei <fei.jiang@intel.com>
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Reviewed-by: Dong, Eddie <eddie.dong@intel.com>
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Tested-by: Dong, Eddie <eddie.dong@intel.com>
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---
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drivers/gpu/drm/i915/intel_csr.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
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index ca1a578d790d..ddcc51f5e8be 100644
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--- a/drivers/gpu/drm/i915/intel_csr.c
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+++ b/drivers/gpu/drm/i915/intel_csr.c
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@@ -471,7 +471,13 @@ void intel_csr_ucode_init(struct drm_i915_private *dev_priv)
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INIT_WORK(&dev_priv->csr.work, csr_load_work_fn);
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- if (!HAS_CSR(dev_priv))
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+ /*
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+ * In a GVTg enabled environment, loading the CSR firmware for DomU doesn't
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+ * make much sense since we don't allow it to control display power
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+ * management settings. Furthermore, we can save some time for DomU bootup
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+ * by skipping CSR loading.
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+ */
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+ if (!HAS_CSR(dev_priv) || intel_vgpu_active(dev_priv))
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return;
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if (i915_modparams.dmc_firmware_path)
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--
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https://clearlinux.org
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