On Sun, 2019-05-19 at 21:56 -0700, Rodrigo Vivi wrote:
> Suspend resume is broken if we try to enable/disable dc9 on
> cases with disabled displays.
>
Reviewed-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_drv.c | 103 ++++++++++++++++++++++------
> ----
> 1 file changed, 71 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c
> b/drivers/gpu/drm/i915/i915_drv.c
> index 2c7a4318d13c..90693327065a 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -2117,6 +2117,15 @@ get_suspend_mode(struct drm_i915_private
> *dev_priv, bool hibernate)
> return I915_DRM_SUSPEND_MEM;
> }
>
> +static void intel_display_suspend_late(struct drm_i915_private
> *dev_priv)
> +{
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> + if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv))
> + bxt_enable_dc9(dev_priv);
> +}
> +
> static int i915_drm_suspend_late(struct drm_device *dev, bool
> hibernation)
> {
> struct drm_i915_private *dev_priv = to_i915(dev);
> @@ -2132,10 +2141,10 @@ static int i915_drm_suspend_late(struct
> drm_device *dev, bool hibernation)
> intel_power_domains_suspend(dev_priv,
> get_suspend_mode(dev_priv,
> hibernation));
>
> + intel_display_suspend_late(dev_priv);
> +
> ret = 0;
> - if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv))
> - bxt_enable_dc9(dev_priv);
> - else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> + if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> hsw_enable_pc8(dev_priv);
> else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> ret = vlv_suspend_complete(dev_priv);
> @@ -2265,6 +2274,17 @@ static int i915_drm_resume(struct drm_device
> *dev)
> return 0;
> }
>
> +static void intel_display_resume_early(struct drm_i915_private
> *dev_priv)
> +{
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> + if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv)) {
> + gen9_sanitize_dc_state(dev_priv);
> + bxt_disable_dc9(dev_priv);
> + }
> +}
> +
> static int i915_drm_resume_early(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = to_i915(dev);
> @@ -2327,10 +2347,9 @@ static int i915_drm_resume_early(struct
> drm_device *dev)
>
> i915_check_and_clear_faults(dev_priv);
>
> - if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv)) {
> - gen9_sanitize_dc_state(dev_priv);
> - bxt_disable_dc9(dev_priv);
> - } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> + intel_display_resume_early(dev_priv);
> +
> + if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> hsw_disable_pc8(dev_priv);
> }
>
> @@ -2868,6 +2887,20 @@ static int vlv_resume_prepare(struct
> drm_i915_private *dev_priv,
> return ret;
> }
>
> +static void intel_runtime_display_suspend(struct drm_i915_private
> *dev_priv)
> +{
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> + if (INTEL_GEN(dev_priv) >= 11) {
> + icl_display_core_uninit(dev_priv);
> + bxt_enable_dc9(dev_priv);
> + } else if (IS_GEN9_LP(dev_priv)) {
> + bxt_display_core_uninit(dev_priv);
> + bxt_enable_dc9(dev_priv);
> + }
> +}
> +
> static int intel_runtime_suspend(struct device *kdev)
> {
> struct pci_dev *pdev = to_pci_dev(kdev);
> @@ -2897,14 +2930,10 @@ static int intel_runtime_suspend(struct
> device *kdev)
>
> intel_uncore_suspend(&dev_priv->uncore);
>
> + intel_runtime_display_suspend(dev_priv);
> +
> ret = 0;
> - if (INTEL_GEN(dev_priv) >= 11) {
> - icl_display_core_uninit(dev_priv);
> - bxt_enable_dc9(dev_priv);
> - } else if (IS_GEN9_LP(dev_priv)) {
> - bxt_display_core_uninit(dev_priv);
> - bxt_enable_dc9(dev_priv);
> - } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> + if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> hsw_enable_pc8(dev_priv);
> } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> {
> ret = vlv_suspend_complete(dev_priv);
> @@ -2966,6 +2995,31 @@ static int intel_runtime_suspend(struct device
> *kdev)
> return 0;
> }
>
> +static void intel_runtime_display_resume(struct drm_i915_private
> *dev_priv)
> +{
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> + if (INTEL_GEN(dev_priv) >= 11) {
> + bxt_disable_dc9(dev_priv);
> + icl_display_core_init(dev_priv, true);
> + if (dev_priv->csr.dmc_payload) {
> + if (dev_priv->csr.allowed_dc_mask &
> + DC_STATE_EN_UPTO_DC6)
> + skl_enable_dc6(dev_priv);
> + else if (dev_priv->csr.allowed_dc_mask &
> + DC_STATE_EN_UPTO_DC5)
> + gen9_enable_dc5(dev_priv);
> + }
> + } else if (IS_GEN9_LP(dev_priv)) {
> + bxt_disable_dc9(dev_priv);
> + bxt_display_core_init(dev_priv, true);
> + if (dev_priv->csr.dmc_payload &&
> + (dev_priv->csr.allowed_dc_mask &
> DC_STATE_EN_UPTO_DC5))
> + gen9_enable_dc5(dev_priv);
> + }
> +}
> +
> static int intel_runtime_resume(struct device *kdev)
> {
> struct pci_dev *pdev = to_pci_dev(kdev);
> @@ -2986,24 +3040,9 @@ static int intel_runtime_resume(struct device
> *kdev)
> if (intel_uncore_unclaimed_mmio(&dev_priv->uncore))
> DRM_DEBUG_DRIVER("Unclaimed access during suspend,
> bios?\n");
>
> - if (INTEL_GEN(dev_priv) >= 11) {
> - bxt_disable_dc9(dev_priv);
> - icl_display_core_init(dev_priv, true);
> - if (dev_priv->csr.dmc_payload) {
> - if (dev_priv->csr.allowed_dc_mask &
> - DC_STATE_EN_UPTO_DC6)
> - skl_enable_dc6(dev_priv);
> - else if (dev_priv->csr.allowed_dc_mask &
> - DC_STATE_EN_UPTO_DC5)
> - gen9_enable_dc5(dev_priv);
> - }
> - } else if (IS_GEN9_LP(dev_priv)) {
> - bxt_disable_dc9(dev_priv);
> - bxt_display_core_init(dev_priv, true);
> - if (dev_priv->csr.dmc_payload &&
> - (dev_priv->csr.allowed_dc_mask &
> DC_STATE_EN_UPTO_DC5))
> - gen9_enable_dc5(dev_priv);
> - } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> + intel_runtime_display_resume(dev_priv);
> +
> + if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> hsw_disable_pc8(dev_priv);
> } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> {
> ret = vlv_resume_prepare(dev_priv, true);
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