On Fri, Sep 15, 2023 at 09:34:26PM +0300, Ville Syrjälä wrote:
> On Thu, Sep 14, 2023 at 10:26:40PM +0300, Imre Deak wrote:
> > Add intel_modeset_pipes_in_mask_early() to modeset a provided set of
> > pipes, used in a follow-up patch.
> >
> > While at it add _late suffix to intel_modeset_all_pipes() for clarity
> > and add DocBook descriptions for the two exported functions.
> >
> > v2:
> > - Add a flag controlling if active planes are force updated as well.
> > - Add DockBook descriptions.
> > v3:
> > - For clarity use _early/_late suffixes for the exported functions
> > instead of the update_active_planes parameter. (Ville)
> >
> > Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
> > Signed-off-by: Imre Deak <imre.d...@intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_cdclk.c | 2 +-
> > drivers/gpu/drm/i915/display/intel_display.c | 45 ++++++++++++++++++--
> > drivers/gpu/drm/i915/display/intel_display.h | 6 ++-
> > drivers/gpu/drm/i915/display/skl_watermark.c | 2 +-
> > 4 files changed, 47 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c
> > b/drivers/gpu/drm/i915/display/intel_cdclk.c
> > index ad5251ba6fe13..a2e20b25d6361 100644
> > --- a/drivers/gpu/drm/i915/display/intel_cdclk.c
> > +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
> > @@ -3139,7 +3139,7 @@ int intel_modeset_calc_cdclk(struct
> > intel_atomic_state *state)
> > } else if (intel_cdclk_needs_modeset(&old_cdclk_state->actual,
> > &new_cdclk_state->actual)) {
> > /* All pipes must be switched off while we change the cdclk. */
> > - ret = intel_modeset_all_pipes(state, "CDCLK change");
> > + ret = intel_modeset_all_pipes_late(state, "CDCLK change");
> > if (ret)
> > return ret;
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index 6bbc9069754c4..27e6ea21e0a91 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -5407,8 +5407,9 @@ intel_verify_planes(struct intel_atomic_state *state)
> > plane_state->uapi.visible);
> > }
> >
> > -int intel_modeset_all_pipes(struct intel_atomic_state *state,
> > - const char *reason)
> > +static int intel_modeset_pipes_in_mask(struct intel_atomic_state *state,
> > + const char *reason, u8 mask,
> > + bool update_active_planes)
> > {
> > struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > struct intel_crtc *crtc;
> > @@ -5417,7 +5418,7 @@ int intel_modeset_all_pipes(struct intel_atomic_state
> > *state,
> > * Add all pipes to the state, and force
> > * a modeset on all the active ones.
> > */
> > - for_each_intel_crtc(&dev_priv->drm, crtc) {
> > + for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc, mask) {
> > struct intel_crtc_state *crtc_state;
> > int ret;
> >
> > @@ -5448,7 +5449,9 @@ int intel_modeset_all_pipes(struct intel_atomic_state
> > *state,
> > if (ret)
> > return ret;
> >
> > - crtc_state->update_planes |= crtc_state->active_planes;
> > + if (update_active_planes)
> > + crtc_state->update_planes |= crtc_state->active_planes;
>
> This thing still confuses me. We have a bunch of other "late modeset"
> stuff in there (async flip handling and clearing of fastset flag at
> least). I still think a clean split would be better than a confusing
> parameter.
Ok, makes sense. The rest of the flags start out as cleared, but the
only relevant thing for early modeset is setting uapi.mode_changed
(IIUC).
Also, adding hw.enable && !hw.active CRTCs to the state could be
done only during an early modeset.
> > +
> > crtc_state->async_flip_planes = 0;
> > crtc_state->do_async_flip = false;
> > }
> > @@ -5456,6 +5459,40 @@ int intel_modeset_all_pipes(struct
> > intel_atomic_state *state,
> > return 0;
> > }
> >
> > +/**
> > + * intel_modeset_pipes_in_mask_early - force a full modeset on a set of
> > pipes
> > + * @state: intel atomic state
> > + * @reason: the reason for the full modeset
> > + * @mask: mask of pipes to modeset
> > + *
> > + * Force a full modeset on pipes in @mask due to the description in
> > @reason.
> > + * This function can be called only before new plane states are computed.
> > + *
> > + * Returns 0 in case of success, negative error code otherwise.
> > + */
> > +int intel_modeset_pipes_in_mask_early(struct intel_atomic_state *state,
> > + const char *reason, u8 mask)
> > +{
> > + return intel_modeset_pipes_in_mask(state, reason, mask, false);
> > +}
> > +
> > +/**
> > + * intel_modeset_all_pipes_late - force a full modeset on all pipes
> > + * @state: intel atomic state
> > + * @reason: the reason for the full modeset
> > + *
> > + * Force a full modeset on all pipes due to the description in @reason.
> > + * This function can be called only after new plane states are computed
> > + * already.
> > + *
> > + * Returns 0 in case of success, negative error code otherwise.
> > + */
> > +int intel_modeset_all_pipes_late(struct intel_atomic_state *state,
> > + const char *reason)
> > +{
> > + return intel_modeset_pipes_in_mask(state, reason, -1, true);
> > +}
> > +
> > /*
> > * This implements the workaround described in the "notes" section of the
> > mode
> > * set sequence documentation. When going from no pipes or single pipe to
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.h
> > b/drivers/gpu/drm/i915/display/intel_display.h
> > index 49ac8473b988b..64a5be7859331 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display.h
> > @@ -513,8 +513,10 @@ void intel_plane_fixup_bitmasks(struct
> > intel_crtc_state *crtc_state);
> > void intel_update_watermarks(struct drm_i915_private *i915);
> >
> > /* modesetting */
> > -int intel_modeset_all_pipes(struct intel_atomic_state *state,
> > - const char *reason);
> > +int intel_modeset_pipes_in_mask_early(struct intel_atomic_state *state,
> > + const char *reason, u8 pipe_mask);
> > +int intel_modeset_all_pipes_late(struct intel_atomic_state *state,
> > + const char *reason);
> > void intel_modeset_get_crtc_power_domains(struct intel_crtc_state
> > *crtc_state,
> > struct intel_power_domain_mask
> > *old_domains);
> > void intel_modeset_put_crtc_power_domains(struct intel_crtc *crtc,
> > diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c
> > b/drivers/gpu/drm/i915/display/skl_watermark.c
> > index 063929a42a42f..a29d9b717deed 100644
> > --- a/drivers/gpu/drm/i915/display/skl_watermark.c
> > +++ b/drivers/gpu/drm/i915/display/skl_watermark.c
> > @@ -2616,7 +2616,7 @@ skl_compute_ddb(struct intel_atomic_state *state)
> >
> > if (old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus)
> > {
> > /* TODO: Implement vblank synchronized MBUS joining
> > changes */
> > - ret = intel_modeset_all_pipes(state, "MBUS joining
> > change");
> > + ret = intel_modeset_all_pipes_late(state, "MBUS joining
> > change");
> > if (ret)
> > return ret;
> > }
> > --
> > 2.37.2
>
> --
> Ville Syrjälä
> Intel
