| Message ID | 20180123190536.11208-14-paulo.r.zanoni@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jan 23, 2018 at 05:05:32PM -0200, Paulo Zanoni wrote: > From: Mahesh Kumar <mahesh1.kumar@intel.com> > > ICL has two slices of DBuf, each slice of size 1024 blocks. > We should not always enable slice-2. It should be enabled only if > display total required BW is > 12GBps OR more than 1 pipes are enabled. > > Changes since V1: > - typecast total_data_rate to u64 before multiplication to solve any > possible overflow (Rodrigo) > - fix where skl_wm_get_hw_state was memsetting ddb, resulting > enabled_slices to become zero > - Fix the logic of calculating ddb_size > Changes since V2: > - If no-crtc is part of commit required_slices will have value "0", > don't try to disable DBuf slice. > > Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com> > --- > drivers/gpu/drm/i915/intel_display.c | 12 +++++++ > drivers/gpu/drm/i915/intel_drv.h | 6 ++++ > drivers/gpu/drm/i915/intel_pm.c | 64 +++++++++++++++++++++++++-------- > drivers/gpu/drm/i915/intel_runtime_pm.c | 47 +++++++++++++++++++++--- > 4 files changed, 110 insertions(+), 19 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c > index bad3b112ac3e..3eb2359c221b 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -12117,6 +12117,8 @@ static void skl_update_crtcs(struct drm_atomic_state *state) > bool progress; > enum pipe pipe; > int i; > + uint8_t hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices; > + uint8_t required_slices = intel_state->wm_results.ddb.enabled_slices; > > const struct skl_ddb_entry *entries[I915_MAX_PIPES] = {}; > > @@ -12125,6 +12127,11 @@ static void skl_update_crtcs(struct drm_atomic_state *state) > if (new_crtc_state->active) > entries[i] = &to_intel_crtc_state(old_crtc_state)->wm.skl.ddb; > > + /* If 2nd DBuf slice required, enable it here */ > + if (INTEL_GEN(dev_priv) >= 11 && required_slices && > + required_slices > hw_enabled_slices) > + icl_dbuf_slices_update(dev_priv, required_slices); > + > /* > * Whenever the number of active pipes changes, we need to make sure we > * update the pipes in the right order so that their ddb allocations > @@ -12175,6 +12182,11 @@ static void skl_update_crtcs(struct drm_atomic_state *state) > progress = true; > } > } while (progress); > + > + /* If 2nd DBuf slice is no more required disable it */ > + if (INTEL_GEN(dev_priv) >= 11 && required_slices && > + required_slices < hw_enabled_slices) > + icl_dbuf_slices_update(dev_priv, required_slices); > } > > static void intel_atomic_helper_free_state(struct drm_i915_private *dev_priv) > diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h > index c5d6092aca41..d4639a161fe3 100644 > --- a/drivers/gpu/drm/i915/intel_drv.h > +++ b/drivers/gpu/drm/i915/intel_drv.h > @@ -140,6 +140,10 @@ > #define KHz(x) (1000 * (x)) > #define MHz(x) KHz(1000 * (x)) > > +#define KBps(x) (1000 * (x)) > +#define MBps(x) KBps(1000 * (x)) > +#define GBps(x) ((uint64_t) 1000 * MBps((x))) > + > /* > * Display related stuff > */ > @@ -1890,6 +1894,8 @@ bool intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv, > enum intel_display_power_domain domain); > void intel_display_power_put(struct drm_i915_private *dev_priv, > enum intel_display_power_domain domain); > +void icl_dbuf_slices_update(struct drm_i915_private *dev_priv, > + uint8_t req_slices); > > static inline void > assert_rpm_device_not_suspended(struct drm_i915_private *dev_priv) > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index e8d98857c208..d4cd631377da 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -3767,9 +3767,42 @@ bool intel_can_enable_sagv(struct drm_atomic_state *state) > return true; > } > > +static unsigned int intel_get_ddb_size(struct drm_i915_private *dev_priv, > + const struct intel_crtc_state *cstate, > + const unsigned int total_data_rate, > + const int num_active, > + struct skl_ddb_allocation *ddb) > +{ > + const struct drm_display_mode *adjusted_mode; > + u64 total_data_bw; > + u16 ddb_size = INTEL_INFO(dev_priv)->ddb_size; > + > + WARN_ON(ddb_size == 0); > + > + if (INTEL_GEN(dev_priv) < 11) > + return ddb_size - 4; /* 4 blocks for bypass path allocation */ > + > + adjusted_mode = &cstate->base.adjusted_mode; > + total_data_bw = (u64)total_data_rate * drm_mode_vrefresh(adjusted_mode); > + > + /* > + * 12GB/s is maximum BW supported by single DBuf slice. > + */ > + if (total_data_bw >= GBps(12) || num_active > 1) > + ddb->enabled_slices = 2; > + else { > + ddb->enabled_slices = 1; > + ddb_size /= 2; > + } > + > + return ddb_size; > +} > + > static void > skl_ddb_get_pipe_allocation_limits(struct drm_device *dev, > const struct intel_crtc_state *cstate, > + const unsigned int total_data_rate, > + struct skl_ddb_allocation *ddb, > struct skl_ddb_entry *alloc, /* out */ > int *num_active /* out */) > { > @@ -3792,11 +3825,8 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev, > else > *num_active = hweight32(dev_priv->active_crtcs); > > - ddb_size = INTEL_INFO(dev_priv)->ddb_size; > - WARN_ON(ddb_size == 0); > - > - if (INTEL_GEN(dev_priv) < 11) > - ddb_size -= 4; /* 4 blocks for bypass path allocation */ > + ddb_size = intel_get_ddb_size(dev_priv, cstate, total_data_rate, > + *num_active, ddb); > > /* > * If the state doesn't change the active CRTC's, then there's > @@ -4235,7 +4265,14 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate, > return 0; > } > > - skl_ddb_get_pipe_allocation_limits(dev, cstate, alloc, &num_active); > + total_data_rate = skl_get_total_relative_data_rate(cstate, > + plane_data_rate, > + plane_y_data_rate); > + if (total_data_rate == 0) > + return 0; > + > + skl_ddb_get_pipe_allocation_limits(dev, cstate, total_data_rate, ddb, > + alloc, &num_active); > alloc_size = skl_ddb_entry_size(alloc); > if (alloc_size == 0) > return 0; > @@ -4270,12 +4307,6 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate, > * > * FIXME: we may not allocate every single block here. > */ > - total_data_rate = skl_get_total_relative_data_rate(cstate, > - plane_data_rate, > - plane_y_data_rate); > - if (total_data_rate == 0) > - return 0; > - > start = alloc->start; > for_each_plane_id_on_crtc(intel_crtc, plane_id) { > unsigned int data_rate, y_data_rate; > @@ -5068,7 +5099,6 @@ skl_copy_wm_for_pipe(struct skl_wm_values *dst, > sizeof(dst->ddb.y_plane[pipe])); > memcpy(dst->ddb.plane[pipe], src->ddb.plane[pipe], > sizeof(dst->ddb.plane[pipe])); > - dst->ddb.enabled_slices = src->ddb.enabled_slices; > } > > static void > @@ -5381,8 +5411,12 @@ void skl_wm_get_hw_state(struct drm_device *dev) > /* Fully recompute DDB on first atomic commit */ > dev_priv->wm.distrust_bios_wm = true; > } else { > - /* Easy/common case; just sanitize DDB now if everything off */ > - memset(ddb, 0, sizeof(*ddb)); > + /* > + * Easy/common case; just sanitize DDB now if everything off > + * Keep dbuf slice info intact > + */ > + memset(ddb->plane, 0, sizeof(ddb->plane)); > + memset(ddb->y_plane, 0, sizeof(ddb->y_plane)); > } > } > > diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c > index 13c8dad95b84..a67a57738740 100644 > --- a/drivers/gpu/drm/i915/intel_runtime_pm.c > +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c > @@ -2610,10 +2610,49 @@ static void gen9_dbuf_disable(struct drm_i915_private *dev_priv) > DRM_ERROR("DBuf power disable timeout!\n"); > } > > -/* > - * TODO: we shouldn't always enable DBUF_CTL_S2, we should only enable it when > - * needed and keep it disabled as much as possible. > - */ > +static uint8_t intel_dbuf_max_slices(struct drm_i915_private *dev_priv) > +{ > + if (INTEL_GEN(dev_priv) < 11) > + return 1; > + return 2; > +} > + > +void icl_dbuf_slices_update(struct drm_i915_private *dev_priv, > + uint8_t req_slices) > +{ > + uint8_t hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices; > + u32 val; > + > + if (req_slices > intel_dbuf_max_slices(dev_priv)) { > + DRM_ERROR("Invalid number of dbuf slices requested\n"); > + return; > + } > + > + if (req_slices == hw_enabled_slices) > + return; > + > + val = I915_READ(DBUF_CTL_S2); > + if (req_slices > hw_enabled_slices) { > + I915_WRITE(DBUF_CTL_S2, val | DBUF_POWER_REQUEST); > + POSTING_READ(DBUF_CTL_S2); > + > + udelay(10); > + if (!(I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE)) > + DRM_ERROR("DBuf power enable timeout\n"); > + else > + dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices; > + } else { > + I915_WRITE(DBUF_CTL_S2, val & ~DBUF_POWER_REQUEST); > + POSTING_READ(DBUF_CTL_S2); > + > + udelay(10); > + if (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE) > + DRM_ERROR("DBuf power disable timeout!\n"); > + else > + dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices; It feels a little ugly to be duplicating the Write->Posting Read->Wait->Read->Error pattern across this function and icl_dbuf_enable/disable below - not to mention that we have the same pattern up above in gen9_dbuf_enable/disable. Maybe we should refactor the gen9 versions in to helpers that take a slice number, and then reuse those for ICL as well? > + } > +} > + > static void icl_dbuf_enable(struct drm_i915_private *dev_priv) > { > I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) | DBUF_POWER_REQUEST); > -- > 2.14.3 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index bad3b112ac3e..3eb2359c221b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12117,6 +12117,8 @@ static void skl_update_crtcs(struct drm_atomic_state *state) bool progress; enum pipe pipe; int i; + uint8_t hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices; + uint8_t required_slices = intel_state->wm_results.ddb.enabled_slices; const struct skl_ddb_entry *entries[I915_MAX_PIPES] = {}; @@ -12125,6 +12127,11 @@ static void skl_update_crtcs(struct drm_atomic_state *state) if (new_crtc_state->active) entries[i] = &to_intel_crtc_state(old_crtc_state)->wm.skl.ddb; + /* If 2nd DBuf slice required, enable it here */ + if (INTEL_GEN(dev_priv) >= 11 && required_slices && + required_slices > hw_enabled_slices) + icl_dbuf_slices_update(dev_priv, required_slices); + /* * Whenever the number of active pipes changes, we need to make sure we * update the pipes in the right order so that their ddb allocations @@ -12175,6 +12182,11 @@ static void skl_update_crtcs(struct drm_atomic_state *state) progress = true; } } while (progress); + + /* If 2nd DBuf slice is no more required disable it */ + if (INTEL_GEN(dev_priv) >= 11 && required_slices && + required_slices < hw_enabled_slices) + icl_dbuf_slices_update(dev_priv, required_slices); } static void intel_atomic_helper_free_state(struct drm_i915_private *dev_priv) diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index c5d6092aca41..d4639a161fe3 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -140,6 +140,10 @@ #define KHz(x) (1000 * (x)) #define MHz(x) KHz(1000 * (x)) +#define KBps(x) (1000 * (x)) +#define MBps(x) KBps(1000 * (x)) +#define GBps(x) ((uint64_t) 1000 * MBps((x))) + /* * Display related stuff */ @@ -1890,6 +1894,8 @@ bool intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain); void intel_display_power_put(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain); +void icl_dbuf_slices_update(struct drm_i915_private *dev_priv, + uint8_t req_slices); static inline void assert_rpm_device_not_suspended(struct drm_i915_private *dev_priv) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index e8d98857c208..d4cd631377da 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3767,9 +3767,42 @@ bool intel_can_enable_sagv(struct drm_atomic_state *state) return true; } +static unsigned int intel_get_ddb_size(struct drm_i915_private *dev_priv, + const struct intel_crtc_state *cstate, + const unsigned int total_data_rate, + const int num_active, + struct skl_ddb_allocation *ddb) +{ + const struct drm_display_mode *adjusted_mode; + u64 total_data_bw; + u16 ddb_size = INTEL_INFO(dev_priv)->ddb_size; + + WARN_ON(ddb_size == 0); + + if (INTEL_GEN(dev_priv) < 11) + return ddb_size - 4; /* 4 blocks for bypass path allocation */ + + adjusted_mode = &cstate->base.adjusted_mode; + total_data_bw = (u64)total_data_rate * drm_mode_vrefresh(adjusted_mode); + + /* + * 12GB/s is maximum BW supported by single DBuf slice. + */ + if (total_data_bw >= GBps(12) || num_active > 1) + ddb->enabled_slices = 2; + else { + ddb->enabled_slices = 1; + ddb_size /= 2; + } + + return ddb_size; +} + static void skl_ddb_get_pipe_allocation_limits(struct drm_device *dev, const struct intel_crtc_state *cstate, + const unsigned int total_data_rate, + struct skl_ddb_allocation *ddb, struct skl_ddb_entry *alloc, /* out */ int *num_active /* out */) { @@ -3792,11 +3825,8 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev, else *num_active = hweight32(dev_priv->active_crtcs); - ddb_size = INTEL_INFO(dev_priv)->ddb_size; - WARN_ON(ddb_size == 0); - - if (INTEL_GEN(dev_priv) < 11) - ddb_size -= 4; /* 4 blocks for bypass path allocation */ + ddb_size = intel_get_ddb_size(dev_priv, cstate, total_data_rate, + *num_active, ddb); /* * If the state doesn't change the active CRTC's, then there's @@ -4235,7 +4265,14 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate, return 0; } - skl_ddb_get_pipe_allocation_limits(dev, cstate, alloc, &num_active); + total_data_rate = skl_get_total_relative_data_rate(cstate, + plane_data_rate, + plane_y_data_rate); + if (total_data_rate == 0) + return 0; + + skl_ddb_get_pipe_allocation_limits(dev, cstate, total_data_rate, ddb, + alloc, &num_active); alloc_size = skl_ddb_entry_size(alloc); if (alloc_size == 0) return 0; @@ -4270,12 +4307,6 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate, * * FIXME: we may not allocate every single block here. */ - total_data_rate = skl_get_total_relative_data_rate(cstate, - plane_data_rate, - plane_y_data_rate); - if (total_data_rate == 0) - return 0; - start = alloc->start; for_each_plane_id_on_crtc(intel_crtc, plane_id) { unsigned int data_rate, y_data_rate; @@ -5068,7 +5099,6 @@ skl_copy_wm_for_pipe(struct skl_wm_values *dst, sizeof(dst->ddb.y_plane[pipe])); memcpy(dst->ddb.plane[pipe], src->ddb.plane[pipe], sizeof(dst->ddb.plane[pipe])); - dst->ddb.enabled_slices = src->ddb.enabled_slices; } static void @@ -5381,8 +5411,12 @@ void skl_wm_get_hw_state(struct drm_device *dev) /* Fully recompute DDB on first atomic commit */ dev_priv->wm.distrust_bios_wm = true; } else { - /* Easy/common case; just sanitize DDB now if everything off */ - memset(ddb, 0, sizeof(*ddb)); + /* + * Easy/common case; just sanitize DDB now if everything off + * Keep dbuf slice info intact + */ + memset(ddb->plane, 0, sizeof(ddb->plane)); + memset(ddb->y_plane, 0, sizeof(ddb->y_plane)); } } diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 13c8dad95b84..a67a57738740 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -2610,10 +2610,49 @@ static void gen9_dbuf_disable(struct drm_i915_private *dev_priv) DRM_ERROR("DBuf power disable timeout!\n"); } -/* - * TODO: we shouldn't always enable DBUF_CTL_S2, we should only enable it when - * needed and keep it disabled as much as possible. - */ +static uint8_t intel_dbuf_max_slices(struct drm_i915_private *dev_priv) +{ + if (INTEL_GEN(dev_priv) < 11) + return 1; + return 2; +} + +void icl_dbuf_slices_update(struct drm_i915_private *dev_priv, + uint8_t req_slices) +{ + uint8_t hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices; + u32 val; + + if (req_slices > intel_dbuf_max_slices(dev_priv)) { + DRM_ERROR("Invalid number of dbuf slices requested\n"); + return; + } + + if (req_slices == hw_enabled_slices) + return; + + val = I915_READ(DBUF_CTL_S2); + if (req_slices > hw_enabled_slices) { + I915_WRITE(DBUF_CTL_S2, val | DBUF_POWER_REQUEST); + POSTING_READ(DBUF_CTL_S2); + + udelay(10); + if (!(I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE)) + DRM_ERROR("DBuf power enable timeout\n"); + else + dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices; + } else { + I915_WRITE(DBUF_CTL_S2, val & ~DBUF_POWER_REQUEST); + POSTING_READ(DBUF_CTL_S2); + + udelay(10); + if (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE) + DRM_ERROR("DBuf power disable timeout!\n"); + else + dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices; + } +} + static void icl_dbuf_enable(struct drm_i915_private *dev_priv) { I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) | DBUF_POWER_REQUEST);