On Wed, 20 Apr 2016 20:27:54 +0300
Imre Deak <imre.d...@intel.com> wrote:
> Initially we thought that the platform specific suspend/resume sequences
> can be shared between the runtime and system suspend/resume handlers.
> This turned out to be not true, we have quite a few differences on most
> of the platforms. This was realized already earlier by Paulo who
> uninlined the platform specific resume_prepare handlers. We have the
> same problem with the corresponding suspend_complete handlers, there are
> platform differences that make it unfeasible to share the code between
> the runtime and system suspend paths. Also now we call functions that
> need to be paired like hsw_enable_pc8()/hsw_disable_pc8() from different
> levels of the call stack, which is confusing. Fix this by uninlining the
> suspend_complete handlers too.
>
> This is also needed by the next patch that removes a redundant
> uninit/init call during system suspend/resume on BXT.
>
> No functional change.
Reviewed-by: Bob Paauwe <bob.j.paa...@intel.com>
>
> CC: Paulo Zanoni <przan...@gmail.com>
> Signed-off-by: Imre Deak <imre.d...@intel.com>
> ---
> drivers/gpu/drm/i915/i915_drv.c | 83
> ++++++++++++++---------------------------
> 1 file changed, 29 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 9a016f1..ea9b3fe 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -567,10 +567,9 @@ static void intel_suspend_encoders(struct
> drm_i915_private *dev_priv)
> drm_modeset_unlock_all(dev);
> }
>
> -static int intel_suspend_complete(struct drm_i915_private *dev_priv);
> static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
> bool rpm_resume);
> -static int bxt_resume_prepare(struct drm_i915_private *dev_priv);
> +static int vlv_suspend_complete(struct drm_i915_private *dev_priv);
>
> static bool suspend_to_idle(struct drm_i915_private *dev_priv)
> {
> @@ -668,7 +667,14 @@ static int i915_drm_suspend_late(struct drm_device
> *drm_dev, bool hibernation)
> if (!fw_csr)
> intel_power_domains_suspend(dev_priv);
>
> - ret = intel_suspend_complete(dev_priv);
> + ret = 0;
> + if (IS_BROXTON(dev_priv)) {
> + bxt_display_core_uninit(dev_priv);
> + bxt_enable_dc9(dev_priv);
> + } else 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);
>
> if (ret) {
> DRM_ERROR("Suspend complete failed: %d\n", ret);
> @@ -862,9 +868,10 @@ static int i915_drm_resume_early(struct drm_device *dev)
>
> intel_uncore_early_sanitize(dev, true);
>
> - if (IS_BROXTON(dev))
> - ret = bxt_resume_prepare(dev_priv);
> - else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> + if (IS_BROXTON(dev)) {
> + bxt_disable_dc9(dev_priv);
> + bxt_display_core_init(dev_priv, true);
> + } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> hsw_disable_pc8(dev_priv);
>
> intel_uncore_sanitize(dev);
> @@ -1102,29 +1109,6 @@ static int i915_pm_resume(struct device *dev)
> return i915_drm_resume(drm_dev);
> }
>
> -static int hsw_suspend_complete(struct drm_i915_private *dev_priv)
> -{
> - hsw_enable_pc8(dev_priv);
> -
> - return 0;
> -}
> -
> -static int bxt_suspend_complete(struct drm_i915_private *dev_priv)
> -{
> - bxt_display_core_uninit(dev_priv);
> - bxt_enable_dc9(dev_priv);
> -
> - return 0;
> -}
> -
> -static int bxt_resume_prepare(struct drm_i915_private *dev_priv)
> -{
> - bxt_disable_dc9(dev_priv);
> - bxt_display_core_init(dev_priv, true);
> -
> - return 0;
> -}
> -
> /*
> * Save all Gunit registers that may be lost after a D3 and a subsequent
> * S0i[R123] transition. The list of registers needing a save/restore is
> @@ -1530,7 +1514,16 @@ static int intel_runtime_suspend(struct device *device)
> intel_suspend_gt_powersave(dev);
> intel_runtime_pm_disable_interrupts(dev_priv);
>
> - ret = intel_suspend_complete(dev_priv);
> + ret = 0;
> + if (IS_BROXTON(dev_priv)) {
> + bxt_display_core_uninit(dev_priv);
> + bxt_enable_dc9(dev_priv);
> + } else 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);
> + }
> +
> if (ret) {
> DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
> intel_runtime_pm_enable_interrupts(dev_priv);
> @@ -1604,12 +1597,14 @@ static int intel_runtime_resume(struct device *device)
> if (IS_GEN6(dev_priv))
> intel_init_pch_refclk(dev);
>
> - if (IS_BROXTON(dev))
> - ret = bxt_resume_prepare(dev_priv);
> - else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> + if (IS_BROXTON(dev)) {
> + bxt_disable_dc9(dev_priv);
> + bxt_display_core_init(dev_priv, true);
> + } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> hsw_disable_pc8(dev_priv);
> - else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> + } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
> ret = vlv_resume_prepare(dev_priv, true);
> + }
>
> /*
> * No point of rolling back things in case of an error, as the best
> @@ -1640,26 +1635,6 @@ static int intel_runtime_resume(struct device *device)
> return ret;
> }
>
> -/*
> - * This function implements common functionality of runtime and system
> - * suspend sequence.
> - */
> -static int intel_suspend_complete(struct drm_i915_private *dev_priv)
> -{
> - int ret;
> -
> - if (IS_BROXTON(dev_priv))
> - ret = bxt_suspend_complete(dev_priv);
> - else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> - ret = hsw_suspend_complete(dev_priv);
> - else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> - ret = vlv_suspend_complete(dev_priv);
> - else
> - ret = 0;
> -
> - return ret;
> -}
> -
> static const struct dev_pm_ops i915_pm_ops = {
> /*
> * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
--
--
Bob Paauwe
bob.j.paa...@intel.com
IOTG / PED Software Organization
Intel Corp. Folsom, CA
(916) 356-6193
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