On Wed, 2019-12-18 at 20:00 +0200, Ville Syrjälä wrote:
> On Fri, Dec 13, 2019 at 03:02:27PM +0200, Stanislav Lisovskiy wrote:
> > Start manipulating DBuf slices as a mask,
> > but not as a total number, as current approach
> > doesn't give us full control on all combinations
> > of slices, which we might need(like enabling S2
> > only can't enabled by setting enabled_slices=1).
> >
> > Removed wrong code from intel_get_ddb_size as
> > it doesn't match to BSpec. For now still just
> > use DBuf slice until proper algorithm is implemented.
> >
> > Other minor code refactoring to get prepared
> > for major DBuf assignment changes landed:
> > - As now enabled slices contain a mask
> > we still need some value which should
> > reflect how much DBuf slices are supported
> > by the platform, now device info contains
> > num_supported_dbuf_slices.
> > - Removed unneeded assertion as we are now
> > manipulating slices in a more proper way.
> >
> > v2: Start using enabled_slices in dev_priv
> >
> > v3: "enabled_slices" is now "enabled_dbuf_slices_mask",
> > as this now sits in dev_priv independently.
> >
> > Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 23 ++--
> > .../drm/i915/display/intel_display_power.c | 100 ++++++++----
> > ------
> > .../drm/i915/display/intel_display_power.h | 5 +
> > .../drm/i915/display/intel_display_types.h | 2 +-
> > drivers/gpu/drm/i915/i915_drv.h | 2 +-
> > drivers/gpu/drm/i915/i915_pci.c | 6 +-
> > drivers/gpu/drm/i915/intel_device_info.h | 1 +
> > drivers/gpu/drm/i915/intel_pm.c | 49 +++------
> > drivers/gpu/drm/i915/intel_pm.h | 2 +-
> > 9 files changed, 84 insertions(+), 106 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index 0e09d0c23b1d..42a0ea540d4f 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -13359,12 +13359,12 @@ static void verify_wm_state(struct
> > intel_crtc *crtc,
Hi Ville,
Thank you for comments, please see replies for some of those inline.
> >
> > skl_pipe_ddb_get_hw_state(crtc, hw->ddb_y, hw->ddb_uv);
> >
> > - hw_enabled_slices = intel_enabled_dbuf_slices_num(dev_priv);
> > + hw_enabled_slices = intel_enabled_dbuf_slices_mask(dev_priv);
> >
> > if (INTEL_GEN(dev_priv) >= 11 &&
> > - hw_enabled_slices != dev_priv->enabled_dbuf_slices_num)
> > - DRM_ERROR("mismatch in DBUF Slices (expected %u, got
> > %u)\n",
> > - dev_priv->enabled_dbuf_slices_num,
> > + hw_enabled_slices != dev_priv->enabled_dbuf_slices_mask)
> > + DRM_ERROR("mismatch in DBUF Slices (expected %x, got
> > %x)\n",
> > + dev_priv->enabled_dbuf_slices_mask,
> > hw_enabled_slices);
> >
> > /* planes */
> > @@ -14549,22 +14549,23 @@ static void
> > intel_update_trans_port_sync_crtcs(struct intel_crtc *crtc,
> > static void icl_dbuf_slice_pre_update(struct intel_atomic_state
> > *state)
> > {
> > struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > - u8 hw_enabled_slices = dev_priv->enabled_dbuf_slices_num;
> > - u8 required_slices = state->enabled_dbuf_slices_num;
> > + u8 hw_enabled_slices = dev_priv->enabled_dbuf_slices_mask;
> > + u8 required_slices = state->enabled_dbuf_slices_mask;
> > + u8 slices_union = hw_enabled_slices | required_slices;
> >
> > /* If 2nd DBuf slice required, enable it here */
> > - if (INTEL_GEN(dev_priv) >= 11 && required_slices >
> > hw_enabled_slices)
> > - icl_dbuf_slices_update(dev_priv, required_slices);
> > + if (INTEL_GEN(dev_priv) >= 11 && required_slices !=
> > hw_enabled_slices)
> > + icl_dbuf_slices_update(dev_priv, slices_union);
> > }
> >
> > static void icl_dbuf_slice_post_update(struct intel_atomic_state
> > *state)
> > {
> > struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > - u8 hw_enabled_slices = dev_priv->enabled_dbuf_slices_num;
> > - u8 required_slices = state->enabled_dbuf_slices_num;
> > + u8 hw_enabled_slices = dev_priv->enabled_dbuf_slices_mask;
> > + u8 required_slices = state->enabled_dbuf_slices_mask;
> >
> > /* If 2nd DBuf slice is no more required disable it */
> > - if (INTEL_GEN(dev_priv) >= 11 && required_slices <
> > hw_enabled_slices)
> > + if (INTEL_GEN(dev_priv) >= 11 && required_slices !=
> > hw_enabled_slices)
>
> I would rename the variables to old_slices vs. new_slices or
> something
> like that. Would match the common naming pattern we use extensively
> all
> over.
Yep, we just used to have it that way, so I just didn't want to
change variable names.
>
> > icl_dbuf_slices_update(dev_priv, required_slices);
> > }
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c
> > b/drivers/gpu/drm/i915/display/intel_display_power.c
> > index b8983422a882..ba384a5315f8 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> > @@ -1031,15 +1031,6 @@ static bool
> > gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv,
> > (I915_READ(DC_STATE_EN) &
> > DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0);
> > }
> >
> > -static void gen9_assert_dbuf_enabled(struct drm_i915_private
> > *dev_priv)
> > -{
> > - u32 tmp = I915_READ(DBUF_CTL);
> > -
> > - WARN((tmp & (DBUF_POWER_STATE | DBUF_POWER_REQUEST)) !=
> > - (DBUF_POWER_STATE | DBUF_POWER_REQUEST),
> > - "Unexpected DBuf power power state (0x%08x)\n", tmp);
> > -}
> > -
> > static void gen9_disable_dc_states(struct drm_i915_private
> > *dev_priv)
> > {
> > struct intel_cdclk_state cdclk_state = {};
> > @@ -1055,8 +1046,6 @@ static void gen9_disable_dc_states(struct
> > drm_i915_private *dev_priv)
> > /* Can't read out voltage_level so can't use
> > intel_cdclk_changed() */
> > WARN_ON(intel_cdclk_needs_modeset(&dev_priv->cdclk.hw,
> > &cdclk_state));
> >
> > - gen9_assert_dbuf_enabled(dev_priv);
>
> Why are you removing these? I think you still left the code in place
> to
> power up the first slice uncoditionally. Also not sure if DMC just
> powers that sucker up regardless. I think we should try it and if DMC
> isn't insane we should turn all the slices off when we don't need
> them.
I just didn't get why we do this check here, as we actually have that
check in verify_wm_state. Also this hardcoded check seems to always
assume that we should have both slices enabled which might be wrong -
we could have now different configurations, prior to this call,
as this is called for example before suspend which would be
intel_power_domains_suspend->icl_display_core_uninit-
>gen9_disable_dc_states->gen9_assert_dbuf_enabled.
But prior to suspend we can now have S1 or S2 in any combination
enabled or disabled based on pipes config.
verify_wm_state does it at least in a smarter way, i.e it checks
the actual calculated sw state against hw state and then WARNs about
the mismatch.
>
> > -
> > if (IS_GEN9_LP(dev_priv))
> > bxt_verify_ddi_phy_power_wells(dev_priv);
> >
> > @@ -4254,72 +4243,71 @@ static void gen9_dbuf_disable(struct
> > drm_i915_private *dev_priv)
> > intel_dbuf_slice_set(dev_priv, DBUF_CTL, false);
> > }
> >
> > -static u8 intel_dbuf_max_slices(struct drm_i915_private *dev_priv)
> > +int intel_dbuf_max_slices(struct drm_i915_private *dev_priv)
> > {
> > - if (INTEL_GEN(dev_priv) < 11)
> > - return 1;
> > - return 2;
> > + return INTEL_INFO(dev_priv)->num_supported_dbuf_slices;
> > +}
>
> I don't see this being used anywhere outside this file in this patch.
> So why is it being made non-static? Also it's rather redundant now
> and could just be inlined into the single caller we have left.
>
> > +
> > +void icl_program_dbuf_slices(struct drm_i915_private *dev_priv)
> > +{
> > + const u8 hw_enabled_slices = dev_priv-
> > >enabled_dbuf_slices_mask;
>
> This whole function is just a one line wrapper now that does nothing
> special. So I would not even add it.
>
> > +
> > + icl_dbuf_slices_update(dev_priv, hw_enabled_slices);
> > }
> >
> > void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
> > u8 req_slices)
> > {
> > - const u8 hw_enabled_slices = dev_priv->enabled_dbuf_slices_num;
> > - bool ret;
> > + int i;
> > + int max_slices = intel_dbuf_max_slices(dev_priv);
> >
> > - if (req_slices > intel_dbuf_max_slices(dev_priv)) {
> > + if (hweight8(req_slices) > intel_dbuf_max_slices(dev_priv)) {
>
> You already have max_slices in a variable.
>
> > DRM_ERROR("Invalid number of dbuf slices requested\n");
>
> Can't happen unless we messed up in state calculation. We should
> drop the check or just WARN and keep going. But that's probably
> material for another patch.
>
> > return;
> > }
> >
> > - if (req_slices == hw_enabled_slices || req_slices == 0)
> > - return;
> > + DRM_DEBUG_KMS("Updating dbuf slices to %x\n", req_slices);
>
> Pls use 0x%x so it's obvious it's hex.
>
> >
> > - if (req_slices > hw_enabled_slices)
> > - ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2,
> > true);
> > - else
> > - ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2,
> > false);
> > + for (i = 0; i < max_slices; i++) {
> > + int slice_bit = BIT(i);
> > + bool slice_set = (slice_bit & req_slices) != 0;
> > +
> > + switch (slice_bit) {
> > + case DBUF_S1_BIT:
> > + intel_dbuf_slice_set(dev_priv,
> > + DBUF_CTL_S1,
> > + slice_set);
> > + break;
> > + case DBUF_S2_BIT:
> > + intel_dbuf_slice_set(dev_priv,
> > + DBUF_CTL_S2,
> > + slice_set);
> > + break;
> > + default:
> > + MISSING_CASE(slice_bit);
> > + }
>
> Still can be just:
> intel_dbuf_slice_set(dev_priv, DBUF_CTL(i),
> req_slices & BIT(i));
I actually have this already in latest patch revision:
https://patchwork.freedesktop.org/patch/345308/?series=70059&rev=10
Stan
>
>
> > + }
> >
> > - if (ret)
> > - dev_priv->enabled_dbuf_slices_num = req_slices;
> > + dev_priv->enabled_dbuf_slices_mask = 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);
> > - I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) |
> > DBUF_POWER_REQUEST);
> > - POSTING_READ(DBUF_CTL_S2);
> > -
> > - udelay(10);
> > -
> > - if (!(I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
> > - !(I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
> > - DRM_ERROR("DBuf power enable timeout\n");
> > - else
> > - /*
> > - * FIXME: for now pretend that we only have 1 slice,
> > see
> > - * intel_enabled_dbuf_slices_num().
> > - */
> > - dev_priv->enabled_dbuf_slices_num = 1;
> > + /*
> > + * Just power up 1 slice, we will
> > + * figure out later which slices we have and what we need.
> > + */
> > + dev_priv->enabled_dbuf_slices_mask = DBUF_S1_BIT;
> > + icl_program_dbuf_slices(dev_priv);
> > }
> >
> > static void icl_dbuf_disable(struct drm_i915_private *dev_priv)
> > {
> > - I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) &
> > ~DBUF_POWER_REQUEST);
> > - I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) &
> > ~DBUF_POWER_REQUEST);
> > - POSTING_READ(DBUF_CTL_S2);
> > -
> > - udelay(10);
> > -
> > - if ((I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
> > - (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
> > - DRM_ERROR("DBuf power disable timeout!\n");
> > - else
> > - /*
> > - * FIXME: for now pretend that the first slice is
> > always
> > - * enabled, see intel_enabled_dbuf_slices_num().
> > - */
> > - dev_priv->enabled_dbuf_slices_num = 1;
> > + /*
> > + * Disable all slices
> > + */
> > + dev_priv->enabled_dbuf_slices_mask = 0;
> > + icl_program_dbuf_slices(dev_priv);
> > }
> >
> > static void icl_mbus_init(struct drm_i915_private *dev_priv)
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h
> > b/drivers/gpu/drm/i915/display/intel_display_power.h
> > index 1da04f3e0fb3..0d9f87607eac 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_power.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_power.h
> > @@ -311,8 +311,13 @@ intel_display_power_put_async(struct
> > drm_i915_private *i915,
> > for ((wf) = intel_display_power_get((i915), (domain)); (wf); \
> > intel_display_power_put_async((i915), (domain), (wf)),
> > (wf) = 0)
> >
> > +#define DBUF_S1_BIT BIT(0)
> > +#define DBUF_S2_BIT BIT(1)
> > +
> > void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
> > u8 req_slices);
> > +void icl_program_dbuf_slices(struct drm_i915_private *dev_priv);
> > +int intel_dbuf_max_slices(struct drm_i915_private *dev_priv);
> >
> > void chv_phy_powergate_lanes(struct intel_encoder *encoder,
> > bool override, unsigned int mask);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> > b/drivers/gpu/drm/i915/display/intel_display_types.h
> > index 70e65c2d525d..ba2e41a03051 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> > @@ -518,7 +518,7 @@ struct intel_atomic_state {
> > struct skl_ddb_values wm_results;
> >
> > /* Number of enabled DBuf slices */
> > - u8 enabled_dbuf_slices_num;
> > + u8 enabled_dbuf_slices_mask;
> >
> > struct i915_sw_fence commit_ready;
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h
> > b/drivers/gpu/drm/i915/i915_drv.h
> > index 7a2d9fa5a9a6..ec4b9e3cef79 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -1210,7 +1210,7 @@ struct drm_i915_private {
> > bool distrust_bios_wm;
> > } wm;
> >
> > - u8 enabled_dbuf_slices_num; /* GEN11 has configurable 2 slices
> > */
> > + u8 enabled_dbuf_slices_mask; /* GEN11 has configurable 2 slices
> > */
> >
> > struct dram_info {
> > bool valid;
> > diff --git a/drivers/gpu/drm/i915/i915_pci.c
> > b/drivers/gpu/drm/i915/i915_pci.c
> > index 877560b1031e..2068aac5ab6a 100644
> > --- a/drivers/gpu/drm/i915/i915_pci.c
> > +++ b/drivers/gpu/drm/i915/i915_pci.c
> > @@ -614,7 +614,8 @@ static const struct intel_device_info
> > intel_cherryview_info = {
> > .has_gt_uc = 1, \
> > .display.has_hdcp = 1, \
> > .display.has_ipc = 1, \
> > - .ddb_size = 896
> > + .ddb_size = 896, \
> > + .num_supported_dbuf_slices = 1
> >
> > #define SKL_PLATFORM \
> > GEN9_FEATURES, \
> > @@ -649,6 +650,7 @@ static const struct intel_device_info
> > intel_skylake_gt4_info = {
> > #define GEN9_LP_FEATURES \
> > GEN(9), \
> > .is_lp = 1, \
> > + .num_supported_dbuf_slices = 1, \
> > .display.has_hotplug = 1, \
> > .engine_mask = BIT(RCS0) | BIT(VCS0) | BIT(BCS0) | BIT(VECS0),
> > \
> > .pipe_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C), \
> > @@ -737,6 +739,7 @@ static const struct intel_device_info
> > intel_coffeelake_gt3_info = {
> > GEN9_FEATURES, \
> > GEN(10), \
> > .ddb_size = 1024, \
> > + .num_supported_dbuf_slices = 1, \
> > .display.has_dsc = 1, \
> > .has_coherent_ggtt = false, \
> > GLK_COLORS
> > @@ -773,6 +776,7 @@ static const struct intel_device_info
> > intel_cannonlake_info = {
> > }, \
> > GEN(11), \
> > .ddb_size = 2048, \
> > + .num_supported_dbuf_slices = 2, \
> > .has_logical_ring_elsq = 1, \
> > .color = { .degamma_lut_size = 33, .gamma_lut_size = 262145 }
> >
> > diff --git a/drivers/gpu/drm/i915/intel_device_info.h
> > b/drivers/gpu/drm/i915/intel_device_info.h
> > index 2725cb7fc169..7d4d122d2182 100644
> > --- a/drivers/gpu/drm/i915/intel_device_info.h
> > +++ b/drivers/gpu/drm/i915/intel_device_info.h
> > @@ -180,6 +180,7 @@ struct intel_device_info {
> > } display;
> >
> > u16 ddb_size; /* in blocks */
> > + u8 num_supported_dbuf_slices; /* number of DBuf slices */
>
> Redundant comment.
>
> >
> > /* Register offsets for the various display pipes and
> > transcoders */
> > int pipe_offsets[I915_MAX_TRANSCODERS];
> > diff --git a/drivers/gpu/drm/i915/intel_pm.c
> > b/drivers/gpu/drm/i915/intel_pm.c
> > index c2510978ccdf..111bcafd6e4c 100644
> > --- a/drivers/gpu/drm/i915/intel_pm.c
> > +++ b/drivers/gpu/drm/i915/intel_pm.c
> > @@ -3616,26 +3616,22 @@ bool ilk_disable_lp_wm(struct
> > drm_i915_private *dev_priv)
> > return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
> > }
> >
> > -u8 intel_enabled_dbuf_slices_num(struct drm_i915_private
> > *dev_priv)
> > +u8 intel_enabled_dbuf_slices_mask(struct drm_i915_private
> > *dev_priv)
> > {
> > - u8 enabled_dbuf_slices_num;
> > -
> > - /* Slice 1 will always be enabled */
> > - enabled_dbuf_slices_num = 1;
> > + u8 enabled_slices_mask = 0;
> >
> > /* Gen prior to GEN11 have only one DBuf slice */
> > if (INTEL_GEN(dev_priv) < 11)
> > - return enabled_dbuf_slices_num;
> > + return DBUF_S1_BIT;
> >
> > - /*
> > - * FIXME: for now we'll only ever use 1 slice; pretend that we
> > have
> > - * only that 1 slice enabled until we have a proper way for on-
> > demand
> > - * toggling of the second slice.
> > - */
> > - if (0 && I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE)
> > - enabled_dbuf_slices_num++;
> > + /* Check if second DBuf slice is enabled */
> > + if (I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE)
> > + enabled_slices_mask |= DBUF_S1_BIT;
> >
> > - return enabled_dbuf_slices_num;
> > + if (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE)
> > + enabled_slices_mask |= DBUF_S2_BIT;
>
> With parametrized DBUF_CTL this could also just loop over the slices.
>
> > +
> > + return enabled_slices_mask;
> > }
> >
> > /*
> > @@ -3843,8 +3839,6 @@ static u16 intel_get_ddb_size(struct
> > drm_i915_private *dev_priv,
> > {
> > struct drm_atomic_state *state = crtc_state->uapi.state;
> > struct intel_atomic_state *intel_state =
> > to_intel_atomic_state(state);
> > - 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);
> > @@ -3852,23 +3846,8 @@ static u16 intel_get_ddb_size(struct
> > drm_i915_private *dev_priv,
> > if (INTEL_GEN(dev_priv) < 11)
> > return ddb_size - 4; /* 4 blocks for bypass path
> > allocation */
> >
> > - adjusted_mode = &crtc_state->hw.adjusted_mode;
> > - total_data_bw = total_data_rate *
> > drm_mode_vrefresh(adjusted_mode);
> > -
> > - /*
> > - * 12GB/s is maximum BW supported by single DBuf slice.
> > - *
> > - * FIXME dbuf slice code is broken:
> > - * - must wait for planes to stop using the slice before
> > powering it off
> > - * - plane straddling both slices is illegal in multi-pipe
> > scenarios
> > - * - should validate we stay within the hw bandwidth limits
> > - */
> > - if (0 && (num_active > 1 || total_data_bw >= GBps(12))) {
> > - intel_state->enabled_dbuf_slices_num = 2;
> > - } else {
> > - intel_state->enabled_dbuf_slices_num = 1;
> > - ddb_size /= 2;
> > - }
>
> Aren't we left with loads of pointless function arguments now?
>
> > + intel_state->enabled_dbuf_slices_mask = DBUF_S1_BIT;
> > + ddb_size /= 2;
> >
> > return ddb_size;
> > }
> > @@ -4065,7 +4044,7 @@ void skl_pipe_ddb_get_hw_state(struct
> > intel_crtc *crtc,
> >
> > void skl_ddb_get_hw_state(struct drm_i915_private *dev_priv)
> > {
> > - dev_priv->enabled_dbuf_slices_num =
> > intel_enabled_dbuf_slices_num(dev_priv);
> > + dev_priv->enabled_dbuf_slices_mask =
> > intel_enabled_dbuf_slices_mask(dev_priv);
> > }
> >
> > /*
> > @@ -5204,7 +5183,7 @@ skl_compute_ddb(struct intel_atomic_state
> > *state)
> > struct intel_crtc *crtc;
> > int ret, i;
> >
> > - state->enabled_dbuf_slices_num = dev_priv-
> > >enabled_dbuf_slices_num;
> > + state->enabled_dbuf_slices_mask = dev_priv-
> > >enabled_dbuf_slices_mask;
> >
> > for_each_oldnew_intel_crtc_in_state(state, crtc,
> > old_crtc_state,
> > new_crtc_state, i) {
> > diff --git a/drivers/gpu/drm/i915/intel_pm.h
> > b/drivers/gpu/drm/i915/intel_pm.h
> > index a476f6c730e9..7a7494d1224f 100644
> > --- a/drivers/gpu/drm/i915/intel_pm.h
> > +++ b/drivers/gpu/drm/i915/intel_pm.h
> > @@ -33,7 +33,7 @@ void g4x_wm_get_hw_state(struct drm_i915_private
> > *dev_priv);
> > void vlv_wm_get_hw_state(struct drm_i915_private *dev_priv);
> > void ilk_wm_get_hw_state(struct drm_i915_private *dev_priv);
> > void skl_wm_get_hw_state(struct drm_i915_private *dev_priv);
> > -u8 intel_enabled_dbuf_slices_num(struct drm_i915_private
> > *dev_priv);
> > +u8 intel_enabled_dbuf_slices_mask(struct drm_i915_private
> > *dev_priv);
> > void skl_pipe_ddb_get_hw_state(struct intel_crtc *crtc,
> > struct skl_ddb_entry *ddb_y,
> > struct skl_ddb_entry *ddb_uv);
> > --
> > 2.17.1
>
>
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