[Intel-gfx] [PATCH] drm/i915: Remove begin/finish_crtc_commit, v3.
Ville Syrjälä
ville.syrjala at linux.intel.com
Thu Sep 26 16:22:59 UTC 2019
On Thu, Sep 26, 2019 at 11:47:25AM +0200, Maarten Lankhorst wrote:
> This can all be done from the intel_update_crtc function. Split out the
> pipe update into a separate function, just like is done for the planes.
> Pull in all the changes done during fastset as well. It makes no sense
> for it to still exist as a separate function.
>
> Changes since v1:
> - Inline intel_update_pipe_config()
> Changes since v2:
> - Add comments suggested by matt.
> - Reorder commit_pipe_config() to remove all nesting. (Ville, Matt)
> - Use intel_set_pipe_src_size((). (Matt)
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 206 +++++++++----------
> 1 file changed, 95 insertions(+), 111 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index b77574cda648..239e0ca3e3ec 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -136,8 +136,6 @@ static void vlv_prepare_pll(struct intel_crtc *crtc,
> const struct intel_crtc_state *pipe_config);
> static void chv_prepare_pll(struct intel_crtc *crtc,
> const struct intel_crtc_state *pipe_config);
> -static void intel_begin_crtc_commit(struct intel_atomic_state *, struct intel_crtc *);
> -static void intel_finish_crtc_commit(struct intel_atomic_state *, struct intel_crtc *);
> static void intel_crtc_init_scalers(struct intel_crtc *crtc,
> struct intel_crtc_state *crtc_state);
> static void skylake_pfit_enable(const struct intel_crtc_state *crtc_state);
> @@ -4409,45 +4407,6 @@ static void icl_set_pipe_chicken(struct intel_crtc *crtc)
> I915_WRITE(PIPE_CHICKEN(pipe), tmp);
> }
>
> -static void intel_update_pipe_config(const struct intel_crtc_state *old_crtc_state,
> - const struct intel_crtc_state *new_crtc_state)
> -{
> - struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
> - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> -
> - /* drm_atomic_helper_update_legacy_modeset_state might not be called. */
> - crtc->base.mode = new_crtc_state->uapi.mode;
> -
> - /*
> - * Update pipe size and adjust fitter if needed: the reason for this is
> - * that in compute_mode_changes we check the native mode (not the pfit
> - * mode) to see if we can flip rather than do a full mode set. In the
> - * fastboot case, we'll flip, but if we don't update the pipesrc and
> - * pfit state, we'll end up with a big fb scanned out into the wrong
> - * sized surface.
> - */
> -
> - I915_WRITE(PIPESRC(crtc->pipe),
> - ((new_crtc_state->pipe_src_w - 1) << 16) |
> - (new_crtc_state->pipe_src_h - 1));
> -
> - /* on skylake this is done by detaching scalers */
> - if (INTEL_GEN(dev_priv) >= 9) {
> - skl_detach_scalers(new_crtc_state);
> -
> - if (new_crtc_state->pch_pfit.enabled)
> - skylake_pfit_enable(new_crtc_state);
> - } else if (HAS_PCH_SPLIT(dev_priv)) {
> - if (new_crtc_state->pch_pfit.enabled)
> - ironlake_pfit_enable(new_crtc_state);
> - else if (old_crtc_state->pch_pfit.enabled)
> - ironlake_pfit_disable(old_crtc_state);
> - }
> -
> - if (INTEL_GEN(dev_priv) >= 11)
> - icl_set_pipe_chicken(crtc);
> -}
> -
> static void intel_fdi_normal_train(struct intel_crtc *crtc)
> {
> struct drm_device *dev = crtc->base.dev;
> @@ -13739,13 +13698,91 @@ u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
> return crtc->base.funcs->get_vblank_counter(&crtc->base);
> }
>
> +void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc,
> + struct intel_crtc_state *crtc_state)
> +{
> + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> +
> + if (!IS_GEN(dev_priv, 2))
> + intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
> +
> + if (crtc_state->has_pch_encoder) {
> + enum pipe pch_transcoder =
> + intel_crtc_pch_transcoder(crtc);
> +
> + intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder, true);
> + }
> +}
> +
> +static void commit_pipe_config(struct intel_atomic_state *state,
> + struct intel_crtc_state *old_crtc_state,
> + struct intel_crtc_state *new_crtc_state)
> +{
> + struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
> + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> + bool modeset = needs_modeset(new_crtc_state);
> +
> + if (dev_priv->display.atomic_update_watermarks)
> + dev_priv->display.atomic_update_watermarks(state,
> + new_crtc_state);
Moving this here widens the gap between programming the FIFO split and
programming the planes on VLV/CHV. I'd prefer to keep this at the end
to keep it as close to the plane programming as possible.
> +
> + /*
> + * During modesets pipe configuration was programmed as the
> + * CRTC was enabled.
> + */
> + if (modeset)
> + return;
> +
> + if (INTEL_GEN(dev_priv) >= 9)
> + skl_detach_scalers(new_crtc_state);
Similarly I'd move this downwards past the next two things to get
it a bit closer to the pfit/plane programming.
> +
> + if (new_crtc_state->uapi.color_mgmt_changed ||
> + new_crtc_state->update_pipe)
> + intel_color_commit(new_crtc_state);
> +
> + if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
> + bdw_set_pipemisc(new_crtc_state);
> +
> + if (!new_crtc_state->update_pipe)
> + return;
> +
> + /* drm_atomic_helper_update_legacy_modeset_state might not be called. */
> + crtc->base.mode = new_crtc_state->uapi.mode;
> +
> + /*
> + * Update pipe size and adjust fitter if needed: the reason for this is
> + * that in compute_mode_changes we check the native mode (not the pfit
> + * mode) to see if we can flip rather than do a full mode set. In the
> + * fastboot case, we'll flip, but if we don't update the pipesrc and
> + * pfit state, we'll end up with a big fb scanned out into the wrong
> + * sized surface.
> + */
> + intel_set_pipe_src_size(new_crtc_state);
> +
> + if (INTEL_GEN(dev_priv) >= 9) {
> + /*
> + * enable pipe scaler here if needed, if
> + * it's disabled, that's done by
> + * skl_detach_scalers() above.
> + */
> + skylake_pfit_enable(new_crtc_state);
> + } else if (HAS_PCH_SPLIT(dev_priv)) {
> + if (!new_crtc_state->pch_pfit.enabled)
> + ironlake_pfit_disable(old_crtc_state);
> + else
> + ironlake_pfit_enable(new_crtc_state);
> + }
> +
> + if (INTEL_GEN(dev_priv) >= 11)
> + icl_set_pipe_chicken(crtc);
> +}
> +
> static void intel_update_crtc(struct intel_crtc *crtc,
> struct intel_atomic_state *state,
> struct intel_crtc_state *old_crtc_state,
> struct intel_crtc_state *new_crtc_state)
> {
> - struct drm_device *dev = state->base.dev;
> - struct drm_i915_private *dev_priv = to_i915(dev);
> + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> bool modeset = needs_modeset(new_crtc_state);
> struct intel_plane_state *new_plane_state =
> intel_atomic_get_new_plane_state(state,
> @@ -13769,14 +13806,27 @@ static void intel_update_crtc(struct intel_crtc *crtc,
> else if (new_plane_state)
> intel_fbc_enable(crtc, new_crtc_state, new_plane_state);
>
> - intel_begin_crtc_commit(state, crtc);
> + /* Perform vblank evasion around commit operation */
> + intel_pipe_update_start(new_crtc_state);
> +
> + commit_pipe_config(state, old_crtc_state, new_crtc_state);
>
> if (INTEL_GEN(dev_priv) >= 9)
> skl_update_planes_on_crtc(state, crtc);
> else
> i9xx_update_planes_on_crtc(state, crtc);
>
> - intel_finish_crtc_commit(state, crtc);
> + intel_pipe_update_end(new_crtc_state);
> +
> + /*
> + * We usually enable FIFO underrun interrupts as part of the
> + * CRTC enable sequence during modesets. But when we inherit a
> + * valid pipe configuration from the BIOS we need to take care
> + * of enabling them on the CRTC's first fastset.
> + */
> + if (new_crtc_state->update_pipe && !modeset &&
> + old_crtc_state->hw.mode.private_flags & I915_MODE_FLAG_INHERITED)
> + intel_crtc_arm_fifo_underrun(crtc, new_crtc_state);
> }
>
> static void intel_old_crtc_state_disables(struct intel_atomic_state *state,
> @@ -14573,72 +14623,6 @@ skl_max_scale(const struct intel_crtc_state *crtc_state,
> return max_scale;
> }
>
> -static void intel_begin_crtc_commit(struct intel_atomic_state *state,
> - struct intel_crtc *crtc)
> -{
> - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> - struct intel_crtc_state *old_crtc_state =
> - intel_atomic_get_old_crtc_state(state, crtc);
> - struct intel_crtc_state *new_crtc_state =
> - intel_atomic_get_new_crtc_state(state, crtc);
> - bool modeset = needs_modeset(new_crtc_state);
> -
> - /* Perform vblank evasion around commit operation */
> - intel_pipe_update_start(new_crtc_state);
> -
> - if (modeset)
> - goto out;
> -
> - if (new_crtc_state->uapi.color_mgmt_changed ||
> - new_crtc_state->update_pipe)
> - intel_color_commit(new_crtc_state);
> -
> - if (new_crtc_state->update_pipe)
> - intel_update_pipe_config(old_crtc_state, new_crtc_state);
> - else if (INTEL_GEN(dev_priv) >= 9)
> - skl_detach_scalers(new_crtc_state);
> -
> - if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
> - bdw_set_pipemisc(new_crtc_state);
> -
> -out:
> - if (dev_priv->display.atomic_update_watermarks)
> - dev_priv->display.atomic_update_watermarks(state,
> - new_crtc_state);
> -}
> -
> -void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc,
> - struct intel_crtc_state *crtc_state)
> -{
> - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> -
> - if (!IS_GEN(dev_priv, 2))
> - intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
> -
> - if (crtc_state->has_pch_encoder) {
> - enum pipe pch_transcoder =
> - intel_crtc_pch_transcoder(crtc);
> -
> - intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder, true);
> - }
> -}
> -
> -static void intel_finish_crtc_commit(struct intel_atomic_state *state,
> - struct intel_crtc *crtc)
> -{
> - struct intel_crtc_state *old_crtc_state =
> - intel_atomic_get_old_crtc_state(state, crtc);
> - struct intel_crtc_state *new_crtc_state =
> - intel_atomic_get_new_crtc_state(state, crtc);
> -
> - intel_pipe_update_end(new_crtc_state);
> -
> - if (new_crtc_state->update_pipe &&
> - !needs_modeset(new_crtc_state) &&
> - old_crtc_state->hw.mode.private_flags & I915_MODE_FLAG_INHERITED)
> - intel_crtc_arm_fifo_underrun(crtc, new_crtc_state);
> -}
> -
> /**
> * intel_plane_destroy - destroy a plane
> * @plane: plane to destroy
> --
> 2.20.1
--
Ville Syrjälä
Intel
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