[Intel-gfx] [PATCH] drm/i915/display/: Refactor hsw_crtc_enable for bigjoiner cleanup
Jani Nikula
jani.nikula at linux.intel.com
Thu Mar 17 19:15:56 UTC 2022
On Thu, 17 Mar 2022, "Navare, Manasi" <manasi.d.navare at intel.com> wrote:
> On Thu, Mar 17, 2022 at 11:28:03AM -0700, Navare, Manasi wrote:
>> On Thu, Mar 17, 2022 at 05:35:43PM +0200, Jani Nikula wrote:
>> > On Wed, 16 Mar 2022, "Navare, Manasi" <manasi.d.navare at intel.com> wrote:
>> > > On Wed, Mar 16, 2022 at 09:48:17AM +0200, Jani Nikula wrote:
>> > >> On Tue, 15 Mar 2022, Manasi Navare <manasi.d.navare at intel.com> wrote:
>> > >> > This patch abstracts pieces of hsw_crtc_enable corresponding to different
>> > >> > Bspec enable sequence steps into separate functions.
>> > >> > This helps to call them in a specific order for bigjoiner master/slave
>> > >> > in a cleaner fashion.
>> > >>
>> > >> So does this contain only refactoring or functional changes also? One or
>> > >> the other at a time, please, not both.
>> > >
>> > > No this is only refactor, no functional changes here
>> > >
>> > >>
>> > >> Also looks like hsw_crtc_* have accumulated just way too many checks for
>> > >> platforms instead of having a clean break at e.g. display 9 and/or 11.
>> > >
>> > > These checks were already part of hsw_crtc_enable() function that I have just moved to a separate
>> > > function. How do you recommend removing these checks?
>> >
>> > We use hsw_crtc_enable for all DDI platforms and later. We do have the
>> > difference between skl_display_funcs and ddi_display_funcs, but they
>> > both point to hsw_crtc_enable. Maybe it's time for them to have their
>> > own functions that don't have to take so many platform differences into
>> > account.
>>
>> Yes I could perhaps have a separate skl_crtc_enable() function which would then have all parts that apply to DISPLAy >=9
>> everything else can stay in hsw_crtc_enable
>>
>> That makes sense?
>
> Or actually we could have a separate one for >=11 starting ICL, since there are a lot of
> checks for >=11. Also bigjoiner support only from ICL, so then this bigjoiner sequence then only becomes part
> of icl_crtc_enable()
> Which one of the above 2 do you recommend?
Could be both! Depends on the improved clarity vs. amount of code
duplication.
BR,
Jani.
>
> Manasi
>
>>
>> Manasi
>>
>> >
>> > BR,
>> > Jani.
>> >
>> >
>> >
>> >
>> > >
>> > >>
>> > >> Adding references to "enable sequence step 8" is not helpful because
>> > >> it's platform specific. (Yeah, I know there are existing references like
>> > >> this, but they're also suspect.)
>> > >
>> > > Yes agree, may be I will add the comment for what actually the step 7/8 does?
>> > >
>> > > Manasi
>> > >
>> > >>
>> > >>
>> > >> BR,
>> > >> Jani.
>> > >>
>> > >>
>> > >> >
>> > >> > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
>> > >> > Cc: Animesh Manna <animesh.manna at intel.com>
>> > >> > Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
>> > >> > ---
>> > >> > drivers/gpu/drm/i915/display/intel_display.c | 125 ++++++++++---------
>> > >> > 1 file changed, 66 insertions(+), 59 deletions(-)
>> > >> >
>> > >> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
>> > >> > index eb49973621f0..d8e6466c9fa0 100644
>> > >> > --- a/drivers/gpu/drm/i915/display/intel_display.c
>> > >> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
>> > >> > @@ -1865,24 +1865,6 @@ static void hsw_set_frame_start_delay(const struct intel_crtc_state *crtc_state)
>> > >> > intel_de_write(dev_priv, reg, val);
>> > >> > }
>> > >> >
>> > >> > -static void icl_ddi_bigjoiner_pre_enable(struct intel_atomic_state *state,
>> > >> > - const struct intel_crtc_state *crtc_state)
>> > >> > -{
>> > >> > - struct intel_crtc *master_crtc = intel_master_crtc(crtc_state);
>> > >> > -
>> > >> > - /*
>> > >> > - * Enable sequence steps 1-7 on bigjoiner master
>> > >> > - */
>> > >> > - if (intel_crtc_is_bigjoiner_slave(crtc_state))
>> > >> > - intel_encoders_pre_pll_enable(state, master_crtc);
>> > >> > -
>> > >> > - if (crtc_state->shared_dpll)
>> > >> > - intel_enable_shared_dpll(crtc_state);
>> > >> > -
>> > >> > - if (intel_crtc_is_bigjoiner_slave(crtc_state))
>> > >> > - intel_encoders_pre_enable(state, master_crtc);
>> > >> > -}
>> > >> > -
>> > >> > static void hsw_configure_cpu_transcoder(const struct intel_crtc_state *crtc_state)
>> > >> > {
>> > >> > struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>> > >> > @@ -1910,70 +1892,73 @@ static void hsw_configure_cpu_transcoder(const struct intel_crtc_state *crtc_sta
>> > >> > hsw_set_transconf(crtc_state);
>> > >> > }
>> > >> >
>> > >> > -static void hsw_crtc_enable(struct intel_atomic_state *state,
>> > >> > - struct intel_crtc *crtc)
>> > >> > +static void hsw_crtc_pre_pll_enable(struct intel_atomic_state *state,
>> > >> > + const struct intel_crtc_state *crtc_state)
>> > >> > {
>> > >> > - const struct intel_crtc_state *new_crtc_state =
>> > >> > - intel_atomic_get_new_crtc_state(state, crtc);
>> > >> > - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>> > >> > - enum pipe pipe = crtc->pipe, hsw_workaround_pipe;
>> > >> > - enum transcoder cpu_transcoder = new_crtc_state->cpu_transcoder;
>> > >> > - bool psl_clkgate_wa;
>> > >> > -
>> > >> > - if (drm_WARN_ON(&dev_priv->drm, crtc->active))
>> > >> > - return;
>> > >> > + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>> > >> >
>> > >> > - if (!new_crtc_state->bigjoiner_pipes) {
>> > >> > - intel_encoders_pre_pll_enable(state, crtc);
>> > >> > + /*
>> > >> > + * Enable sequence steps 1 - 7 on all pipes
>> > >> > + */
>> > >> > + intel_encoders_pre_pll_enable(state, crtc);
>> > >> > + if (crtc_state->shared_dpll)
>> > >> > + intel_enable_shared_dpll(crtc_state);
>> > >> >
>> > >> > - if (new_crtc_state->shared_dpll)
>> > >> > - intel_enable_shared_dpll(new_crtc_state);
>> > >> > + intel_encoders_pre_enable(state, crtc);
>> > >> > +}
>> > >> >
>> > >> > - intel_encoders_pre_enable(state, crtc);
>> > >> > - } else {
>> > >> > - icl_ddi_bigjoiner_pre_enable(state, new_crtc_state);
>> > >> > - }
>> > >> > +static void hsw_crtc_post_pll_enable(struct intel_atomic_state *state,
>> > >> > + const struct intel_crtc_state *crtc_state)
>> > >> > +{
>> > >> > + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>> > >> > + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>> > >> > + enum pipe pipe = crtc->pipe, hsw_workaround_pipe;
>> > >> > + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
>> > >> > + bool psl_clkgate_wa;
>> > >> >
>> > >> > - intel_dsc_enable(new_crtc_state);
>> > >> > + /*
>> > >> > + * Enable sequence step 8
>> > >> > + */
>> > >> > + intel_dsc_enable(crtc_state);
>> > >> >
>> > >> > if (DISPLAY_VER(dev_priv) >= 13)
>> > >> > - intel_uncompressed_joiner_enable(new_crtc_state);
>> > >> > + intel_uncompressed_joiner_enable(crtc_state);
>> > >> >
>> > >> > - intel_set_pipe_src_size(new_crtc_state);
>> > >> > + intel_set_pipe_src_size(crtc_state);
>> > >> > if (DISPLAY_VER(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
>> > >> > - bdw_set_pipemisc(new_crtc_state);
>> > >> > + bdw_set_pipemisc(crtc_state);
>> > >> >
>> > >> > - if (!intel_crtc_is_bigjoiner_slave(new_crtc_state) &&
>> > >> > + if (!intel_crtc_is_bigjoiner_slave(crtc_state) &&
>> > >> > !transcoder_is_dsi(cpu_transcoder))
>> > >> > - hsw_configure_cpu_transcoder(new_crtc_state);
>> > >> > + hsw_configure_cpu_transcoder(crtc_state);
>> > >> >
>> > >> > crtc->active = true;
>> > >> >
>> > >> > /* Display WA #1180: WaDisableScalarClockGating: glk */
>> > >> > psl_clkgate_wa = DISPLAY_VER(dev_priv) == 10 &&
>> > >> > - new_crtc_state->pch_pfit.enabled;
>> > >> > + crtc_state->pch_pfit.enabled;
>> > >> > if (psl_clkgate_wa)
>> > >> > glk_pipe_scaler_clock_gating_wa(dev_priv, pipe, true);
>> > >> >
>> > >> > if (DISPLAY_VER(dev_priv) >= 9)
>> > >> > - skl_pfit_enable(new_crtc_state);
>> > >> > + skl_pfit_enable(crtc_state);
>> > >> > else
>> > >> > - ilk_pfit_enable(new_crtc_state);
>> > >> > + ilk_pfit_enable(crtc_state);
>> > >> >
>> > >> > /*
>> > >> > * On ILK+ LUT must be loaded before the pipe is running but with
>> > >> > * clocks enabled
>> > >> > */
>> > >> > - intel_color_load_luts(new_crtc_state);
>> > >> > - intel_color_commit(new_crtc_state);
>> > >> > + intel_color_load_luts(crtc_state);
>> > >> > + intel_color_commit(crtc_state);
>> > >> > /* update DSPCNTR to configure gamma/csc for pipe bottom color */
>> > >> > if (DISPLAY_VER(dev_priv) < 9)
>> > >> > - intel_disable_primary_plane(new_crtc_state);
>> > >> > + intel_disable_primary_plane(crtc_state);
>> > >> >
>> > >> > - hsw_set_linetime_wm(new_crtc_state);
>> > >> > + hsw_set_linetime_wm(crtc_state);
>> > >> >
>> > >> > if (DISPLAY_VER(dev_priv) >= 11)
>> > >> > - icl_set_pipe_chicken(new_crtc_state);
>> > >> > + icl_set_pipe_chicken(crtc_state);
>> > >> >
>> > >> > intel_initial_watermarks(state, crtc);
>> > >> >
>> > >> > @@ -1984,8 +1969,8 @@ static void hsw_crtc_enable(struct intel_atomic_state *state,
>> > >> > icl_pipe_mbus_enable(crtc, dbuf_state->joined_mbus);
>> > >> > }
>> > >> >
>> > >> > - if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
>> > >> > - intel_crtc_vblank_on(new_crtc_state);
>> > >> > + if (intel_crtc_is_bigjoiner_slave(crtc_state))
>> > >> > + intel_crtc_vblank_on(crtc_state);
>> > >> >
>> > >> > intel_encoders_enable(state, crtc);
>> > >> >
>> > >> > @@ -1996,7 +1981,7 @@ static void hsw_crtc_enable(struct intel_atomic_state *state,
>> > >> >
>> > >> > /* If we change the relative order between pipe/planes enabling, we need
>> > >> > * to change the workaround. */
>> > >> > - hsw_workaround_pipe = new_crtc_state->hsw_workaround_pipe;
>> > >> > + hsw_workaround_pipe = crtc_state->hsw_workaround_pipe;
>> > >> > if (IS_HASWELL(dev_priv) && hsw_workaround_pipe != INVALID_PIPE) {
>> > >> > struct intel_crtc *wa_crtc;
>> > >> >
>> > >> > @@ -2007,6 +1992,29 @@ static void hsw_crtc_enable(struct intel_atomic_state *state,
>> > >> > }
>> > >> > }
>> > >> >
>> > >> > +static void hsw_crtc_enable(struct intel_atomic_state *state,
>> > >> > + struct intel_crtc *crtc)
>> > >> > +{
>> > >> > + const struct intel_crtc_state *new_crtc_state =
>> > >> > + intel_atomic_get_new_crtc_state(state, crtc);
>> > >> > + struct intel_crtc *slave_crtc;
>> > >> > + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>> > >> > +
>> > >> > + if (drm_WARN_ON(&dev_priv->drm, crtc->active))
>> > >> > + return;
>> > >> > +
>> > >> > + hsw_crtc_pre_pll_enable(state, new_crtc_state);
>> > >> > +
>> > >> > + for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, slave_crtc,
>> > >> > + intel_crtc_bigjoiner_slave_pipes(new_crtc_state)) {
>> > >> > + struct intel_crtc_state *slave_crtc_state =
>> > >> > + intel_atomic_get_new_crtc_state(state, slave_crtc);
>> > >> > +
>> > >> > + hsw_crtc_post_pll_enable(state, slave_crtc_state);
>> > >> > + }
>> > >> > + hsw_crtc_post_pll_enable(state, new_crtc_state);
>> > >> > +}
>> > >> > +
>> > >> > void ilk_pfit_disable(const struct intel_crtc_state *old_crtc_state)
>> > >> > {
>> > >> > struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
>> > >> > @@ -8122,11 +8130,11 @@ static void intel_enable_crtc(struct intel_atomic_state *state,
>> > >> >
>> > >> > intel_crtc_update_active_timings(new_crtc_state);
>> > >> >
>> > >> > - dev_priv->display->crtc_enable(state, crtc);
>> > >> > -
>> > >> > if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
>> > >> > return;
>> > >> >
>> > >> > + dev_priv->display->crtc_enable(state, crtc);
>> > >> > +
>> > >> > intel_drrs_enable(new_crtc_state);
>> > >> >
>> > >> > /* vblanks work again, re-enable pipe CRC. */
>> > >> > @@ -8360,8 +8368,7 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
>> > >> > continue;
>> > >> >
>> > >> > if (intel_dp_mst_is_slave_trans(new_crtc_state) ||
>> > >> > - is_trans_port_sync_master(new_crtc_state) ||
>> > >> > - intel_crtc_is_bigjoiner_master(new_crtc_state))
>> > >> > + is_trans_port_sync_master(new_crtc_state))
>> > >> > continue;
>> > >> >
>> > >> > modeset_pipes &= ~BIT(pipe);
>> > >> > @@ -8371,7 +8378,7 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
>> > >> >
>> > >> > /*
>> > >> > * Then we enable all remaining pipes that depend on other
>> > >> > - * pipes: MST slaves and port sync masters, big joiner master
>> > >> > + * pipes: MST slaves and port sync masters
>> > >> > */
>> > >> > for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
>> > >> > enum pipe pipe = crtc->pipe;
>> > >>
>> > >> --
>> > >> Jani Nikula, Intel Open Source Graphics Center
>> >
>> > --
>> > Jani Nikula, Intel Open Source Graphics Center
--
Jani Nikula, Intel Open Source Graphics Center
More information about the Intel-gfx
mailing list