[Intel-gfx] [PATCH] drm/i915/icl: Enable DC9 as lowest possible state during screen-off
Rodrigo Vivi
rodrigo.vivi at intel.com
Tue Oct 23 20:34:54 UTC 2018
On Tue, Oct 23, 2018 at 01:01:11PM -0700, James Ausmus wrote:
> On Tue, Oct 23, 2018 at 11:52:31AM -0700, Rodrigo Vivi wrote:
> > On Tue, Oct 23, 2018 at 11:32:21AM -0700, Anusha Srivatsa wrote:
> > > From: Animesh Manna <animesh.manna at intel.com>
> > >
> > > ICL supports DC5, DC6, and DC9. Enable DC9 during screen-off, and enable
> > > DC5/6 when appropriate.
> > >
> > > v2: (James Ausmus)
> > > - Also handle ICL as GEN9_LP in i915_drm_suspend_late and
> > > i915_drm_suspend_early
> > > - Add DC9 to gen9_dc_mask for ICL
> > > - Re-order GEN checks for newest platform first
> > > - Use INTEL_GEN instead of INTEL_INFO->gen
> > > - Use INTEL_GEN >= 11 instead of IS_ICELAKE
> > > - Consolidate GEN checks
> > >
> > > v3: (James Ausmus)
> > > - Also allow DC6 for ICL (Imre, Art)
> > > - Simplify !(GEN >= 11) to GEN < 11 (Imre)
> > >
> > > v4: (James Ausmus)
> > > - Don't call intel_power_sequencer_reset after DC9 for Gen11+, as the
> > > PPS regs are Always On
> > > - Rebase against upstream changes
> > >
> > > v5: (Anusha Srivatsa)
> > > - rebased against the latest upstream changes.
> > >
> > > v6: (Anusha Srivatsa)
> > > - rebased.Use INTEL_GEN consistently.
> > > - Simplify the code (Rodrigo)
> > >
> > > v7: rebased. Change order according to platforms(Jyoti)
> > >
> > > Cc: Imre Deak <imre.deak at intel.com>
> > > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > > Signed-off-by: Animesh Manna <animesh.manna at intel.com>
> > > Signed-off-by: James Ausmus <james.ausmus at intel.com>
> > > Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
> > > ---
> > > drivers/gpu/drm/i915/i915_drv.c | 20 +++++++++++++++---
> > > drivers/gpu/drm/i915/intel_drv.h | 3 +++
> > > drivers/gpu/drm/i915/intel_runtime_pm.c | 27 +++++++++++++++----------
> > > 3 files changed, 36 insertions(+), 14 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > > index baac35f698f9..6691b9ee95db 100644
> > > --- a/drivers/gpu/drm/i915/i915_drv.c
> > > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > > @@ -2156,7 +2156,7 @@ static int i915_drm_resume_early(struct drm_device *dev)
> > >
> > > intel_uncore_resume_early(dev_priv);
> > >
> > > - if (IS_GEN9_LP(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)) {
> > > @@ -2923,7 +2923,10 @@ static int intel_runtime_suspend(struct device *kdev)
> > > intel_uncore_suspend(dev_priv);
> > >
> > > ret = 0;
> > > - if (IS_GEN9_LP(dev_priv)) {
> > > + 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)) {
> > > @@ -3008,7 +3011,18 @@ static int intel_runtime_resume(struct device *kdev)
> > > if (intel_uncore_unclaimed_mmio(dev_priv))
> > > DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
> > >
> > > - if (IS_GEN9_LP(dev_priv)) {
> > > + 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 &&
> > > diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> > > index 0e9a926fca04..529ff19a5e48 100644
> > > --- a/drivers/gpu/drm/i915/intel_drv.h
> > > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > > @@ -1640,6 +1640,7 @@ void bxt_enable_dc9(struct drm_i915_private *dev_priv);
> > > void bxt_disable_dc9(struct drm_i915_private *dev_priv);
> > > void gen9_enable_dc5(struct drm_i915_private *dev_priv);
> > > unsigned int skl_cdclk_get_vco(unsigned int freq);
> > > +void skl_enable_dc6(struct drm_i915_private *dev_priv);
> > > void intel_dp_get_m_n(struct intel_crtc *crtc,
> > > struct intel_crtc_state *pipe_config);
> > > void intel_dp_set_m_n(const struct intel_crtc_state *crtc_state,
> > > @@ -1989,6 +1990,8 @@ int intel_power_domains_init(struct drm_i915_private *);
> > > void intel_power_domains_cleanup(struct drm_i915_private *dev_priv);
> > > void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume);
> > > void intel_power_domains_fini_hw(struct drm_i915_private *dev_priv);
> > > +void icl_display_core_init(struct drm_i915_private *dev_priv, bool resume);
> > > +void icl_display_core_uninit(struct drm_i915_private *dev_priv);
> > > void intel_power_domains_enable(struct drm_i915_private *dev_priv);
> > > void intel_power_domains_disable(struct drm_i915_private *dev_priv);
> > >
> > > diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
> > > index 5f5416eb9644..ef08313cf359 100644
> > > --- a/drivers/gpu/drm/i915/intel_runtime_pm.c
> > > +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
> > > @@ -560,7 +560,9 @@ static u32 gen9_dc_mask(struct drm_i915_private *dev_priv)
> > > u32 mask;
> > >
> > > mask = DC_STATE_EN_UPTO_DC5;
> > > - if (IS_GEN9_LP(dev_priv))
> > > + if (INTEL_GEN(dev_priv) >= 11)
> > > + mask |= DC_STATE_EN_UPTO_DC6 | DC_STATE_EN_DC9;
> > > + else if (IS_GEN9_LP(dev_priv))
> > > mask |= DC_STATE_EN_DC9;
> > > else
> > > mask |= DC_STATE_EN_UPTO_DC6;
> > > @@ -633,8 +635,8 @@ void bxt_enable_dc9(struct drm_i915_private *dev_priv)
> > > assert_can_enable_dc9(dev_priv);
> > >
> > > DRM_DEBUG_KMS("Enabling DC9\n");
> > > -
> > > - intel_power_sequencer_reset(dev_priv);
> > > + if (INTEL_GEN(dev_priv) < 11)
> > > + intel_power_sequencer_reset(dev_priv);
> >
> > I'm sorry if this was discussed already, but why is this only
> > needed on BXT?
> >
> > Could we have a comment here or mention on commit message?
>
> It is in the commit message! ;)
ops... my bad. sorry.
I didn't read the revision history. :/
>
> <snip>
> > > v4: (James Ausmus)
> > > - Don't call intel_power_sequencer_reset after DC9 for Gen11+, as the
> > > PPS regs are Always On
Is this because it is gen11+ or because PPS regs on icl is on PCH and BXT
doesn't have it?
in other words: Is the gen check better here or should we use HAS_PCH_SPLIT ?
and is this a possible thing to happen on the future?
> </snip>
>
> Enough, or need more?
I believe a comment close to the if is more appropriated to remind
us what to do in the future. ;)
Thanks,
Rodrigo.
>
> -James
>
> >
> > > gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9);
> > > }
> > >
> > > @@ -716,7 +718,7 @@ static void assert_can_enable_dc6(struct drm_i915_private *dev_priv)
> > > assert_csr_loaded(dev_priv);
> > > }
> > >
> > > -static void skl_enable_dc6(struct drm_i915_private *dev_priv)
> > > +void skl_enable_dc6(struct drm_i915_private *dev_priv)
> > > {
> > > assert_can_enable_dc6(dev_priv);
> > >
> > > @@ -2978,17 +2980,20 @@ static uint32_t get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
> > > int requested_dc;
> > > int max_dc;
> > >
> > > - if (IS_GEN9_BC(dev_priv) || INTEL_INFO(dev_priv)->gen >= 10) {
> > > + if (INTEL_GEN(dev_priv) >= 11) {
> > > max_dc = 2;
> > > - mask = 0;
> > > - } else if (IS_GEN9_LP(dev_priv)) {
> > > - max_dc = 1;
> > > /*
> > > * DC9 has a separate HW flow from the rest of the DC states,
> > > * not depending on the DMC firmware. It's needed by system
> > > * suspend/resume, so allow it unconditionally.
> > > */
> > > mask = DC_STATE_EN_DC9;
> > > + } else if (IS_GEN10(dev_priv) || IS_GEN9_BC(dev_priv)) {
> > > + max_dc = 2;
> > > + mask = 0;
> > > + } else if (IS_GEN9_LP(dev_priv)) {
> > > + max_dc = 1;
> > > + mask = DC_STATE_EN_DC9;
> > > } else {
> > > max_dc = 0;
> > > mask = 0;
> > > @@ -3539,8 +3544,8 @@ static void cnl_display_core_uninit(struct drm_i915_private *dev_priv)
> > > I915_WRITE(CHICKEN_MISC_2, val);
> > > }
> > >
> > > -static void icl_display_core_init(struct drm_i915_private *dev_priv,
> > > - bool resume)
> > > +void icl_display_core_init(struct drm_i915_private *dev_priv,
> > > + bool resume)
> > > {
> > > struct i915_power_domains *power_domains = &dev_priv->power_domains;
> > > struct i915_power_well *well;
> > > @@ -3592,7 +3597,7 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
> > > intel_csr_load_program(dev_priv);
> > > }
> > >
> > > -static void icl_display_core_uninit(struct drm_i915_private *dev_priv)
> > > +void icl_display_core_uninit(struct drm_i915_private *dev_priv)
> > > {
> > > struct i915_power_domains *power_domains = &dev_priv->power_domains;
> > > struct i915_power_well *well;
> > > --
> > > 2.17.1
> > >
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