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drm/i915/dgfx: Enable d3cold at s2idle 

commit 2872144aec upstream.

System wide suspend already has support for lmem save/restore during
suspend therefore enabling d3cold for s2idle and keepng it disable for
runtime PM.(Refer below commit for d3cold runtime PM disable justification)
'commit 66eb93e71a ("drm/i915/dgfx: Keep PCI autosuspend control
'on' by default on all dGPU")'

It will reduce the DG2 Card power consumption to ~0 Watt
for s2idle power KPI.

v2:
- Added "Cc: stable@vger.kernel.org".

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8755
Cc: stable@vger.kernel.org
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Tested-by: Aaron Ma <aaron.ma@canonical.com>
Tested-by: Jianshui Yu <Jianshui.yu@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230816125216.1722002-1-anshuman.gupta@intel.com
(cherry picked from commit 2643e6d1f2a5e51877be24042d53cf956589be10)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Anshuman Gupta 2023-08-16 18:22:16 +05:30 committed by Greg Kroah-Hartman
parent 115f2ccd3a
commit 3abffee609
1 changed files with 18 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/gpu/drm/i915/i915_driver.c
View File

@ -574,7 +574,6 @@ static int i915_pcode_init(struct drm_i915_private *i915)
static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
{
struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
struct pci_dev *root_pdev;
int ret;
if (i915_inject_probe_failure(dev_priv))
@ -686,15 +685,6 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
intel_bw_init_hw(dev_priv);
/*
* FIXME: Temporary hammer to avoid freezing the machine on our DGFX
* This should be totally removed when we handle the pci states properly
* on runtime PM and on s2idle cases.
*/
root_pdev = pcie_find_root_port(pdev);
if (root_pdev)
pci_d3cold_disable(root_pdev);
return 0;
err_msi:
@ -718,16 +708,11 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
static void i915_driver_hw_remove(struct drm_i915_private *dev_priv)
{
struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
struct pci_dev *root_pdev;
i915_perf_fini(dev_priv);
if (pdev->msi_enabled)
pci_disable_msi(pdev);
root_pdev = pcie_find_root_port(pdev);
if (root_pdev)
pci_d3cold_enable(root_pdev);
}
/**
@ -1625,6 +1610,8 @@ static int intel_runtime_suspend(struct device *kdev)
{
struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
struct pci_dev *root_pdev;
struct intel_gt *gt;
int ret, i;
@ -1674,6 +1661,15 @@ static int intel_runtime_suspend(struct device *kdev)
drm_err(&dev_priv->drm,
"Unclaimed access detected prior to suspending\n");
/*
* FIXME: Temporary hammer to avoid freezing the machine on our DGFX
* This should be totally removed when we handle the pci states properly
* on runtime PM.
*/
root_pdev = pcie_find_root_port(pdev);
if (root_pdev)
pci_d3cold_disable(root_pdev);
rpm->suspended = true;
/*
@ -1712,6 +1708,8 @@ static int intel_runtime_resume(struct device *kdev)
{
struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
struct pci_dev *root_pdev;
struct intel_gt *gt;
int ret, i;
@ -1725,6 +1723,11 @@ static int intel_runtime_resume(struct device *kdev)
intel_opregion_notify_adapter(dev_priv, PCI_D0);
rpm->suspended = false;
root_pdev = pcie_find_root_port(pdev);
if (root_pdev)
pci_d3cold_enable(root_pdev);
if (intel_uncore_unclaimed_mmio(&dev_priv->uncore))
drm_dbg(&dev_priv->drm,
"Unclaimed access during suspend, bios?\n");