On Tue, Feb 01, 2022 at 01:20:50PM +0200, Jani Nikula wrote:
> On Fri, 28 Jan 2022, Imre Deak <imre.d...@intel.com> wrote:
> > To remove the aliasing of the power domain enum values in a follow-up
> > patch in this patchset (requiring a bigger mask) and allow for defining
> > additional power domains in the future (at least some upcoming TypeC
> > changes requires this) convert the u64 i915_power_well_desc::domains
> > mask to a bitmap.
> >
> > For simplicity I changed the for_each_power_domain_well() macros to
> > accept one domain only instead of a mask, as there isn't any current
> > user passing multiple domains.
> >
> > Signed-off-by: Imre Deak <imre.d...@intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 65 ++++-----
> > .../drm/i915/display/intel_display_power.c | 123 +++++++++++-------
> > .../drm/i915/display/intel_display_power.h | 16 ++-
> > .../display/intel_display_power_internal.h | 2 +-
> > .../i915/display/intel_display_power_map.c | 4 +-
> > 5 files changed, 119 insertions(+), 91 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index 3094cfc668c81..d0b9618383ce3 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -2372,66 +2372,71 @@ intel_legacy_aux_to_power_domain(enum aux_ch aux_ch)
> > }
> > }
> >
> > -static u64 get_crtc_power_domains(struct intel_crtc_state *crtc_state)
> > +static void get_crtc_power_domains(struct intel_crtc_state *crtc_state,
> > + intel_power_domain_mask_t *mask)
> > {
> > struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> > struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
> > struct drm_encoder *encoder;
> > enum pipe pipe = crtc->pipe;
> > - u64 mask;
> > +
> > + bitmap_zero(mask->bits, POWER_DOMAIN_NUM);
> >
> > if (!crtc_state->hw.active)
> > - return 0;
> > + return;
> >
> > - mask = BIT_ULL(POWER_DOMAIN_PIPE(pipe));
> > - mask |= BIT_ULL(POWER_DOMAIN_TRANSCODER(cpu_transcoder));
> > + set_bit(POWER_DOMAIN_PIPE(pipe), mask->bits);
> > + set_bit(POWER_DOMAIN_TRANSCODER(cpu_transcoder), mask->bits);
> > if (crtc_state->pch_pfit.enabled ||
> > crtc_state->pch_pfit.force_thru)
> > - mask |= BIT_ULL(POWER_DOMAIN_PIPE_PANEL_FITTER(pipe));
> > + set_bit(POWER_DOMAIN_PIPE_PANEL_FITTER(pipe), mask->bits);
> >
> > drm_for_each_encoder_mask(encoder, &dev_priv->drm,
> > crtc_state->uapi.encoder_mask) {
> > struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
> >
> > - mask |= BIT_ULL(intel_encoder->power_domain);
> > + set_bit(intel_encoder->power_domain, mask->bits);
> > }
> >
> > if (HAS_DDI(dev_priv) && crtc_state->has_audio)
> > - mask |= BIT_ULL(POWER_DOMAIN_AUDIO_MMIO);
> > + set_bit(POWER_DOMAIN_AUDIO_MMIO, mask->bits);
> >
> > if (crtc_state->shared_dpll)
> > - mask |= BIT_ULL(POWER_DOMAIN_DISPLAY_CORE);
> > + set_bit(POWER_DOMAIN_DISPLAY_CORE, mask->bits);
> >
> > if (crtc_state->dsc.compression_enable)
> > - mask |= BIT_ULL(intel_dsc_power_domain(crtc, cpu_transcoder));
> > -
> > - return mask;
> > + set_bit(intel_dsc_power_domain(crtc, cpu_transcoder),
> > mask->bits);
> > }
> >
> > -static u64
> > -modeset_get_crtc_power_domains(struct intel_crtc_state *crtc_state)
> > +static void
> > +modeset_get_crtc_power_domains(struct intel_crtc_state *crtc_state,
> > + intel_power_domain_mask_t *old_domains)
> > {
> > struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> > struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > enum intel_display_power_domain domain;
> > - u64 domains, new_domains, old_domains;
> > + intel_power_domain_mask_t domains, new_domains;
> >
> > - domains = get_crtc_power_domains(crtc_state);
> > + get_crtc_power_domains(crtc_state, &domains);
> >
> > - new_domains = domains & ~crtc->enabled_power_domains.mask;
> > - old_domains = crtc->enabled_power_domains.mask & ~domains;
> > + bitmap_andnot(new_domains.bits,
> > + domains.bits,
> > + crtc->enabled_power_domains.mask.bits,
> > + POWER_DOMAIN_NUM);
> > + bitmap_andnot(old_domains->bits,
> > + crtc->enabled_power_domains.mask.bits,
> > + domains.bits,
> > + POWER_DOMAIN_NUM);
> >
> > - for_each_power_domain(domain, new_domains)
> > + for_each_power_domain(domain, &new_domains)
> > intel_display_power_get_in_set(dev_priv,
> > &crtc->enabled_power_domains,
> > domain);
> > -
> > - return old_domains;
> > }
> >
> > static void modeset_put_crtc_power_domains(struct intel_crtc *crtc,
> > - u64 domains)
> > + intel_power_domain_mask_t *domains)
> > {
> > intel_display_power_put_mask_in_set(to_i915(crtc->base.dev),
> > &crtc->enabled_power_domains,
> > @@ -8628,7 +8633,7 @@ static void intel_atomic_commit_tail(struct
> > intel_atomic_state *state)
> > struct drm_i915_private *dev_priv = to_i915(dev);
> > struct intel_crtc_state *new_crtc_state, *old_crtc_state;
> > struct intel_crtc *crtc;
> > - u64 put_domains[I915_MAX_PIPES] = {};
> > + intel_power_domain_mask_t put_domains[I915_MAX_PIPES] = {};
> > intel_wakeref_t wakeref = 0;
> > int i;
> >
> > @@ -8645,9 +8650,7 @@ static void intel_atomic_commit_tail(struct
> > intel_atomic_state *state)
> > new_crtc_state, i) {
> > if (intel_crtc_needs_modeset(new_crtc_state) ||
> > new_crtc_state->update_pipe) {
> > -
> > - put_domains[crtc->pipe] =
> > - modeset_get_crtc_power_domains(new_crtc_state);
> > + modeset_get_crtc_power_domains(new_crtc_state,
> > &put_domains[crtc->pipe]);
> > }
> > }
> >
> > @@ -8746,7 +8749,7 @@ static void intel_atomic_commit_tail(struct
> > intel_atomic_state *state)
> > for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> > new_crtc_state, i) {
> > intel_post_plane_update(state, crtc);
> >
> > - modeset_put_crtc_power_domains(crtc, put_domains[crtc->pipe]);
> > + modeset_put_crtc_power_domains(crtc, &put_domains[crtc->pipe]);
> >
> > intel_modeset_verify_crtc(crtc, state, old_crtc_state,
> > new_crtc_state);
> >
> > @@ -10702,11 +10705,11 @@ intel_modeset_setup_hw_state(struct drm_device
> > *dev,
> > for_each_intel_crtc(dev, crtc) {
> > struct intel_crtc_state *crtc_state =
> > to_intel_crtc_state(crtc->base.state);
> > - u64 put_domains;
> > + intel_power_domain_mask_t put_domains;
> >
> > - put_domains = modeset_get_crtc_power_domains(crtc_state);
> > - if (drm_WARN_ON(dev, put_domains))
> > - modeset_put_crtc_power_domains(crtc, put_domains);
> > + modeset_get_crtc_power_domains(crtc_state, &put_domains);
> > + if (drm_WARN_ON(dev, !bitmap_empty(put_domains.bits,
> > POWER_DOMAIN_NUM)))
> > + modeset_put_crtc_power_domains(crtc, &put_domains);
> > }
> >
> > intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c
> > b/drivers/gpu/drm/i915/display/intel_display_power.c
> > index a370ef8376410..cf014d79682ca 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> > @@ -38,13 +38,13 @@
> > (__power_well) - (__dev_priv)->power_domains.power_wells >= 0;
> > \
> > (__power_well)--)
> >
> > -#define for_each_power_domain_well(__dev_priv, __power_well,
> > __domain_mask) \
> > +#define for_each_power_domain_well(__dev_priv, __power_well, __domain)
> > \
> > for_each_power_well(__dev_priv, __power_well)
> > \
> > - for_each_if((__power_well)->domains & (__domain_mask))
> > + for_each_if(test_bit((__domain), (__power_well)->domains.bits))
> >
> > -#define for_each_power_domain_well_reverse(__dev_priv, __power_well,
> > __domain_mask) \
> > +#define for_each_power_domain_well_reverse(__dev_priv, __power_well,
> > __domain) \
> > for_each_power_well_reverse(__dev_priv, __power_well)
> > \
> > - for_each_if((__power_well)->domains & (__domain_mask))
> > + for_each_if(test_bit((__domain), (__power_well)->domains.bits))
> >
> > struct i915_power_well_regs {
> > i915_reg_t bios;
> > @@ -141,7 +141,7 @@ bool __intel_display_power_is_enabled(struct
> > drm_i915_private *dev_priv,
> >
> > is_enabled = true;
> >
> > - for_each_power_domain_well_reverse(dev_priv, power_well,
> > BIT_ULL(domain)) {
> > + for_each_power_domain_well_reverse(dev_priv, power_well, domain) {
> > if (power_well->desc->always_on)
> > continue;
> >
> > @@ -460,13 +460,18 @@ icl_combo_phy_aux_power_well_disable(struct
> > drm_i915_private *dev_priv,
> >
> > #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
> >
> > -static u64 async_put_domains_mask(struct i915_power_domains
> > *power_domains);
> > +static void async_put_domains_mask(struct i915_power_domains
> > *power_domains,
> > + intel_power_domain_mask_t *mask);
> >
> > static int power_well_async_ref_count(struct drm_i915_private *dev_priv,
> > struct i915_power_well *power_well)
> > {
> > - int refs = hweight64(power_well->domains &
> > - async_put_domains_mask(&dev_priv->power_domains));
> > + intel_power_domain_mask_t domain_mask;
> > + int refs;
> > +
> > + async_put_domains_mask(&dev_priv->power_domains, &domain_mask);
> > + bitmap_and(domain_mask.bits, domain_mask.bits,
> > power_well->domains.bits, POWER_DOMAIN_NUM);
> > + refs = bitmap_weight(domain_mask.bits, POWER_DOMAIN_NUM);
> >
> > drm_WARN_ON(&dev_priv->drm, refs > power_well->count);
> >
> > @@ -1869,10 +1874,13 @@ static void chv_pipe_power_well_disable(struct
> > drm_i915_private *dev_priv,
> > chv_set_pipe_power_well(dev_priv, power_well, false);
> > }
> >
> > -static u64 __async_put_domains_mask(struct i915_power_domains
> > *power_domains)
> > +static void __async_put_domains_mask(struct i915_power_domains
> > *power_domains,
> > + intel_power_domain_mask_t *mask)
> > {
> > - return power_domains->async_put_domains[0] |
> > - power_domains->async_put_domains[1];
> > + bitmap_or(mask->bits,
> > + power_domains->async_put_domains[0].bits,
> > + power_domains->async_put_domains[1].bits,
> > + POWER_DOMAIN_NUM);
> > }
> >
> > #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
> > @@ -1883,8 +1891,11 @@ assert_async_put_domain_masks_disjoint(struct
> > i915_power_domains *power_domains)
> > struct drm_i915_private *i915 = container_of(power_domains,
> > struct drm_i915_private,
> > power_domains);
> > - return !drm_WARN_ON(&i915->drm, power_domains->async_put_domains[0] &
> > - power_domains->async_put_domains[1]);
> > +
> > + return !drm_WARN_ON(&i915->drm,
> > +
> > bitmap_intersects(power_domains->async_put_domains[0].bits,
> > +
> > power_domains->async_put_domains[1].bits,
> > + POWER_DOMAIN_NUM));
> > }
> >
> > static bool
> > @@ -1893,14 +1904,17 @@ __async_put_domains_state_ok(struct
> > i915_power_domains *power_domains)
> > struct drm_i915_private *i915 = container_of(power_domains,
> > struct drm_i915_private,
> > power_domains);
> > + intel_power_domain_mask_t async_put_mask;
> > enum intel_display_power_domain domain;
> > bool err = false;
> >
> > err |= !assert_async_put_domain_masks_disjoint(power_domains);
> > - err |= drm_WARN_ON(&i915->drm, !!power_domains->async_put_wakeref !=
> > - !!__async_put_domains_mask(power_domains));
> > + __async_put_domains_mask(power_domains, &async_put_mask);
> > + err |= drm_WARN_ON(&i915->drm,
> > + !!power_domains->async_put_wakeref !=
> > + !bitmap_empty(async_put_mask.bits,
> > POWER_DOMAIN_NUM));
> >
> > - for_each_power_domain(domain, __async_put_domains_mask(power_domains))
> > + for_each_power_domain(domain, &async_put_mask)
> > err |= drm_WARN_ON(&i915->drm,
> > power_domains->domain_use_count[domain] !=
> > 1);
> >
> > @@ -1908,14 +1922,14 @@ __async_put_domains_state_ok(struct
> > i915_power_domains *power_domains)
> > }
> >
> > static void print_power_domains(struct i915_power_domains *power_domains,
> > - const char *prefix, u64 mask)
> > + const char *prefix, intel_power_domain_mask_t
> > *mask)
> > {
> > struct drm_i915_private *i915 = container_of(power_domains,
> > struct drm_i915_private,
> > power_domains);
> > enum intel_display_power_domain domain;
> >
> > - drm_dbg(&i915->drm, "%s (%lu):\n", prefix, hweight64(mask));
> > + drm_dbg(&i915->drm, "%s (%d):\n", prefix, bitmap_weight(mask->bits,
> > POWER_DOMAIN_NUM));
> > for_each_power_domain(domain, mask)
> > drm_dbg(&i915->drm, "%s use_count %d\n",
> > intel_display_power_domain_str(domain),
> > @@ -1933,9 +1947,9 @@ print_async_put_domains_state(struct
> > i915_power_domains *power_domains)
> > power_domains->async_put_wakeref);
> >
> > print_power_domains(power_domains, "async_put_domains[0]",
> > - power_domains->async_put_domains[0]);
> > + &power_domains->async_put_domains[0]);
> > print_power_domains(power_domains, "async_put_domains[1]",
> > - power_domains->async_put_domains[1]);
> > + &power_domains->async_put_domains[1]);
> > }
> >
> > static void
> > @@ -1959,11 +1973,13 @@ verify_async_put_domains_state(struct
> > i915_power_domains *power_domains)
> >
> > #endif /* CONFIG_DRM_I915_DEBUG_RUNTIME_PM */
> >
> > -static u64 async_put_domains_mask(struct i915_power_domains *power_domains)
> > +static void async_put_domains_mask(struct i915_power_domains
> > *power_domains,
> > + intel_power_domain_mask_t *mask)
> > +
> > {
> > assert_async_put_domain_masks_disjoint(power_domains);
> >
> > - return __async_put_domains_mask(power_domains);
> > + __async_put_domains_mask(power_domains, mask);
> > }
> >
> > static void
> > @@ -1972,8 +1988,8 @@ async_put_domains_clear_domain(struct
> > i915_power_domains *power_domains,
> > {
> > assert_async_put_domain_masks_disjoint(power_domains);
> >
> > - power_domains->async_put_domains[0] &= ~BIT_ULL(domain);
> > - power_domains->async_put_domains[1] &= ~BIT_ULL(domain);
> > + clear_bit(domain, power_domains->async_put_domains[0].bits);
> > + clear_bit(domain, power_domains->async_put_domains[1].bits);
> > }
> >
> > static bool
> > @@ -1981,16 +1997,19 @@ intel_display_power_grab_async_put_ref(struct
> > drm_i915_private *dev_priv,
> > enum intel_display_power_domain domain)
> > {
> > struct i915_power_domains *power_domains = &dev_priv->power_domains;
> > + intel_power_domain_mask_t async_put_mask;
> > bool ret = false;
> >
> > - if (!(async_put_domains_mask(power_domains) & BIT_ULL(domain)))
> > + async_put_domains_mask(power_domains, &async_put_mask);
> > + if (!test_bit(domain, async_put_mask.bits))
> > goto out_verify;
> >
> > async_put_domains_clear_domain(power_domains, domain);
> >
> > ret = true;
> >
> > - if (async_put_domains_mask(power_domains))
> > + async_put_domains_mask(power_domains, &async_put_mask);
> > + if (!bitmap_empty(async_put_mask.bits, POWER_DOMAIN_NUM))
> > goto out_verify;
> >
> > cancel_delayed_work(&power_domains->async_put_work);
> > @@ -2012,7 +2031,7 @@ __intel_display_power_get_domain(struct
> > drm_i915_private *dev_priv,
> > if (intel_display_power_grab_async_put_ref(dev_priv, domain))
> > return;
> >
> > - for_each_power_domain_well(dev_priv, power_well, BIT_ULL(domain))
> > + for_each_power_domain_well(dev_priv, power_well, domain)
> > intel_power_well_get(dev_priv, power_well);
> >
> > power_domains->domain_use_count[domain]++;
> > @@ -2093,20 +2112,22 @@ __intel_display_power_put_domain(struct
> > drm_i915_private *dev_priv,
> > struct i915_power_domains *power_domains;
> > struct i915_power_well *power_well;
> > const char *name = intel_display_power_domain_str(domain);
> > + intel_power_domain_mask_t async_put_mask;
> >
> > power_domains = &dev_priv->power_domains;
> >
> > drm_WARN(&dev_priv->drm, !power_domains->domain_use_count[domain],
> > "Use count on domain %s is already zero\n",
> > name);
> > + async_put_domains_mask(power_domains, &async_put_mask);
> > drm_WARN(&dev_priv->drm,
> > - async_put_domains_mask(power_domains) & BIT_ULL(domain),
> > + test_bit(domain, async_put_mask.bits),
> > "Async disabling of domain %s is pending\n",
> > name);
> >
> > power_domains->domain_use_count[domain]--;
> >
> > - for_each_power_domain_well_reverse(dev_priv, power_well,
> > BIT_ULL(domain))
> > + for_each_power_domain_well_reverse(dev_priv, power_well, domain)
> > intel_power_well_put(dev_priv, power_well);
> > }
> >
> > @@ -2135,7 +2156,7 @@ queue_async_put_domains_work(struct
> > i915_power_domains *power_domains,
> > }
> >
> > static void
> > -release_async_put_domains(struct i915_power_domains *power_domains, u64
> > mask)
> > +release_async_put_domains(struct i915_power_domains *power_domains,
> > intel_power_domain_mask_t *mask)
> > {
> > struct drm_i915_private *dev_priv =
> > container_of(power_domains, struct drm_i915_private,
> > @@ -2183,12 +2204,15 @@ intel_display_power_put_async_work(struct
> > work_struct *work)
> > goto out_verify;
> >
> > release_async_put_domains(power_domains,
> > - power_domains->async_put_domains[0]);
> > + &power_domains->async_put_domains[0]);
> >
> > /* Requeue the work if more domains were async put meanwhile. */
> > - if (power_domains->async_put_domains[1]) {
> > - power_domains->async_put_domains[0] =
> > - fetch_and_zero(&power_domains->async_put_domains[1]);
> > + if (!bitmap_empty(power_domains->async_put_domains[1].bits,
> > POWER_DOMAIN_NUM)) {
> > + bitmap_copy(power_domains->async_put_domains[0].bits,
> > + power_domains->async_put_domains[1].bits,
> > + POWER_DOMAIN_NUM);
> > + bitmap_zero(power_domains->async_put_domains[1].bits,
> > + POWER_DOMAIN_NUM);
> > queue_async_put_domains_work(power_domains,
> > fetch_and_zero(&new_work_wakeref));
> > } else {
> > @@ -2240,9 +2264,9 @@ void __intel_display_power_put_async(struct
> > drm_i915_private *i915,
> >
> > /* Let a pending work requeue itself or queue a new one. */
> > if (power_domains->async_put_wakeref) {
> > - power_domains->async_put_domains[1] |= BIT_ULL(domain);
> > + set_bit(domain, power_domains->async_put_domains[1].bits);
> > } else {
> > - power_domains->async_put_domains[0] |= BIT_ULL(domain);
> > + set_bit(domain, power_domains->async_put_domains[0].bits);
> > queue_async_put_domains_work(power_domains,
> > fetch_and_zero(&work_wakeref));
> > }
> > @@ -2273,6 +2297,7 @@ void __intel_display_power_put_async(struct
> > drm_i915_private *i915,
> > void intel_display_power_flush_work(struct drm_i915_private *i915)
> > {
> > struct i915_power_domains *power_domains = &i915->power_domains;
> > + intel_power_domain_mask_t async_put_mask;
> > intel_wakeref_t work_wakeref;
> >
> > mutex_lock(&power_domains->lock);
> > @@ -2281,8 +2306,8 @@ void intel_display_power_flush_work(struct
> > drm_i915_private *i915)
> > if (!work_wakeref)
> > goto out_verify;
> >
> > - release_async_put_domains(power_domains,
> > - async_put_domains_mask(power_domains));
> > + async_put_domains_mask(power_domains, &async_put_mask);
> > + release_async_put_domains(power_domains, &async_put_mask);
> > cancel_delayed_work(&power_domains->async_put_work);
> >
> > out_verify:
> > @@ -2361,13 +2386,13 @@ intel_display_power_get_in_set(struct
> > drm_i915_private *i915,
> > {
> > intel_wakeref_t __maybe_unused wf;
> >
> > - drm_WARN_ON(&i915->drm, power_domain_set->mask & BIT_ULL(domain));
> > + drm_WARN_ON(&i915->drm, test_bit(domain, power_domain_set->mask.bits));
> >
> > wf = intel_display_power_get(i915, domain);
> > #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
> > power_domain_set->wakerefs[domain] = wf;
> > #endif
> > - power_domain_set->mask |= BIT_ULL(domain);
> > + set_bit(domain, power_domain_set->mask.bits);
> > }
> >
> > bool
> > @@ -2377,7 +2402,7 @@ intel_display_power_get_in_set_if_enabled(struct
> > drm_i915_private *i915,
> > {
> > intel_wakeref_t wf;
> >
> > - drm_WARN_ON(&i915->drm, power_domain_set->mask & BIT_ULL(domain));
> > + drm_WARN_ON(&i915->drm, test_bit(domain, power_domain_set->mask.bits));
> >
> > wf = intel_display_power_get_if_enabled(i915, domain);
> > if (!wf)
> > @@ -2386,7 +2411,7 @@ intel_display_power_get_in_set_if_enabled(struct
> > drm_i915_private *i915,
> > #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
> > power_domain_set->wakerefs[domain] = wf;
> > #endif
> > - power_domain_set->mask |= BIT_ULL(domain);
> > + set_bit(domain, power_domain_set->mask.bits);
> >
> > return true;
> > }
> > @@ -2394,11 +2419,11 @@ intel_display_power_get_in_set_if_enabled(struct
> > drm_i915_private *i915,
> > void
> > intel_display_power_put_mask_in_set(struct drm_i915_private *i915,
> > struct intel_display_power_domain_set
> > *power_domain_set,
> > - u64 mask)
> > + intel_power_domain_mask_t *mask)
> > {
> > enum intel_display_power_domain domain;
> >
> > - drm_WARN_ON(&i915->drm, mask & ~power_domain_set->mask);
> > + drm_WARN_ON(&i915->drm, !bitmap_subset(mask->bits,
> > power_domain_set->mask.bits, POWER_DOMAIN_NUM));
> >
> > for_each_power_domain(domain, mask) {
> > intel_wakeref_t __maybe_unused wf = -1;
> > @@ -2407,7 +2432,7 @@ intel_display_power_put_mask_in_set(struct
> > drm_i915_private *i915,
> > wf = fetch_and_zero(&power_domain_set->wakerefs[domain]);
> > #endif
> > intel_display_power_put(i915, domain, wf);
> > - power_domain_set->mask &= ~BIT_ULL(domain);
> > + clear_bit(domain, power_domain_set->mask.bits);
> > }
> > }
> >
> > @@ -2711,8 +2736,6 @@ int intel_power_domains_init(struct drm_i915_private
> > *dev_priv)
> > dev_priv->dmc.target_dc_state =
> > sanitize_target_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
> >
> > - BUILD_BUG_ON(POWER_DOMAIN_NUM > 64);
> > -
> > mutex_init(&power_domains->lock);
> >
> > INIT_DELAYED_WORK(&power_domains->async_put_work,
> > @@ -3805,7 +3828,7 @@ static void intel_power_domains_dump_info(struct
> > drm_i915_private *i915)
> > drm_dbg(&i915->drm, "%-25s %d\n",
> > power_well->desc->name, power_well->count);
> >
> > - for_each_power_domain(domain, power_well->domains)
> > + for_each_power_domain(domain, &power_well->domains)
> > drm_dbg(&i915->drm, " %-23s %d\n",
> > intel_display_power_domain_str(domain),
> > power_domains->domain_use_count[domain]);
> > @@ -3847,7 +3870,7 @@ static void intel_power_domains_verify_state(struct
> > drm_i915_private *i915)
> > power_well->count, enabled);
> >
> > domains_count = 0;
> > - for_each_power_domain(domain, power_well->domains)
> > + for_each_power_domain(domain, &power_well->domains)
> > domains_count +=
> > power_domains->domain_use_count[domain];
> >
> > if (power_well->count != domains_count) {
> > @@ -3962,7 +3985,7 @@ void intel_display_power_debug(struct
> > drm_i915_private *i915, struct seq_file *m
> > seq_printf(m, "%-25s %d\n", power_well->desc->name,
> > power_well->count);
> >
> > - for_each_power_domain(power_domain, power_well->domains)
> > + for_each_power_domain(power_domain, &power_well->domains)
> > seq_printf(m, " %-23s %d\n",
> > intel_display_power_domain_str(power_domain),
> >
> > power_domains->domain_use_count[power_domain]);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h
> > b/drivers/gpu/drm/i915/display/intel_display_power.h
> > index c3232809b95f9..c7155801f9bc6 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_power.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_power.h
> > @@ -164,6 +164,8 @@ enum i915_power_well_id {
> > ((tran) == TRANSCODER_EDP ? POWER_DOMAIN_TRANSCODER_EDP : \
> > (tran) + POWER_DOMAIN_TRANSCODER_A)
> >
> > +typedef struct { DECLARE_BITMAP(bits, POWER_DOMAIN_NUM); }
> > intel_power_domain_mask_t;
>
> I think the typedef is overkill here, and they should only be used for
> totally opaque objects anyway per coding style.
>
> I guess having the struct makes it easier to manage it in parameters and
> declarations, so it would be:
>
> struct intel_power_domain_mask {
> DECLARE_BITMAP(bits, POWER_DOMAIN_NUM);
> };
Ok. Btw, I found having a struct useful after forgetting to convert
if (domains) ...
to
if (!bitmap_empty(domains)) ...
--Imre
>
>
> BR,
> Jani.
>
> > +
> > struct i915_power_domains {
> > /*
> > * Power wells needed for initialization at driver init and suspend
> > @@ -181,21 +183,21 @@ struct i915_power_domains {
> >
> > struct delayed_work async_put_work;
> > intel_wakeref_t async_put_wakeref;
> > - u64 async_put_domains[2];
> > + intel_power_domain_mask_t async_put_domains[2];
> >
> > struct i915_power_well *power_wells;
> > };
> >
> > struct intel_display_power_domain_set {
> > - u64 mask;
> > + intel_power_domain_mask_t mask;
> > #ifdef CONFIG_DRM_I915_DEBUG_RUNTIME_PM
> > intel_wakeref_t wakerefs[POWER_DOMAIN_NUM];
> > #endif
> > };
> >
> > -#define for_each_power_domain(domain, mask)
> > \
> > - for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++) \
> > - for_each_if(BIT_ULL(domain) & (mask))
> > +#define for_each_power_domain(__domain, __mask)
> > \
> > + for ((__domain) = 0; (__domain) < POWER_DOMAIN_NUM; (__domain)++)
> > \
> > + for_each_if(test_bit((__domain), (__mask)->bits))
> >
> > /* intel_display_power.c */
> > int intel_power_domains_init(struct drm_i915_private *dev_priv);
> > @@ -278,13 +280,13 @@ intel_display_power_get_in_set_if_enabled(struct
> > drm_i915_private *i915,
> > void
> > intel_display_power_put_mask_in_set(struct drm_i915_private *i915,
> > struct intel_display_power_domain_set
> > *power_domain_set,
> > - u64 mask);
> > + intel_power_domain_mask_t *mask);
> >
> > static inline void
> > intel_display_power_put_all_in_set(struct drm_i915_private *i915,
> > struct intel_display_power_domain_set
> > *power_domain_set)
> > {
> > - intel_display_power_put_mask_in_set(i915, power_domain_set,
> > power_domain_set->mask);
> > + intel_display_power_put_mask_in_set(i915, power_domain_set,
> > &power_domain_set->mask);
> > }
> >
> > void intel_display_power_debug(struct drm_i915_private *i915, struct
> > seq_file *m);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_power_internal.h
> > b/drivers/gpu/drm/i915/display/intel_display_power_internal.h
> > index 49f6155e62c47..c4167ac2f21f8 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_power_internal.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_power_internal.h
> > @@ -68,7 +68,7 @@ struct i915_power_well_desc {
> >
> > struct i915_power_well {
> > const struct i915_power_well_desc *desc;
> > - u64 domains;
> > + intel_power_domain_mask_t domains;
> > /* power well enable/disable usage count */
> > int count;
> > /* cached hw enabled state */
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c
> > b/drivers/gpu/drm/i915/display/intel_display_power_map.c
> > index 42f5541c5ecc8..7ec4cafec6ba5 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_power_map.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c
> > @@ -2220,13 +2220,13 @@ static void init_power_well_domains(const struct
> > i915_power_well_desc *desc,
> > return;
> >
> > if (desc->domain_list->count == 0) {
> > - power_well->domains = GENMASK_ULL(POWER_DOMAIN_NUM - 1, 0);
> > + bitmap_fill(power_well->domains.bits, POWER_DOMAIN_NUM);
> >
> > return;
> > }
> >
> > for (j = 0; j < desc->domain_list->count; j++)
> > - power_well->domains |= BIT_ULL(desc->domain_list->list[j]);
> > + set_bit(desc->domain_list->list[j], power_well->domains.bits);
> > }
> >
> > static int
>
> --
> Jani Nikula, Intel Open Source Graphics Center
