On Wed, Dec 18, 2019 at 10:59:09AM -0800, José Roberto de Souza wrote:
> Check if fastset is allowed by external dependencies like other pipes
> and transcoders.
>
> Right now this patch only forces a fullmodeset in MST slaves of MST
> masters that needs a fullmodeset but it will be needed for port sync
> as well.
>
> v3:
> - moved handling to intel_atomic_check() this way is guarantee that
> all pipes will have its state computed
>
> v4:
> - added a function to return if MST master neeeds modeset to simply
> code in intel_atomic_check()
>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Cc: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 53 +++++++++++++++-----
> drivers/gpu/drm/i915/display/intel_dp_mst.c | 14 ++++++
> drivers/gpu/drm/i915/display/intel_dp_mst.h | 3 ++
> 3 files changed, 57 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index a4f252d05b37..2a406891567b 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -13903,19 +13903,6 @@ static void intel_crtc_check_fastset(const struct intel_crtc_state *old_crtc_sta
>
> new_crtc_state->uapi.mode_changed = false;
> new_crtc_state->update_pipe = true;
> -
> - /*
> - * If we're not doing the full modeset we want to
> - * keep the current M/N values as they may be
> - * sufficiently different to the computed values
> - * to cause problems.
> - *
> - * FIXME: should really copy more fuzzy state here
> - */
> - new_crtc_state->fdi_m_n = old_crtc_state->fdi_m_n;
> - new_crtc_state->dp_m_n = old_crtc_state->dp_m_n;
> - new_crtc_state->dp_m2_n2 = old_crtc_state->dp_m2_n2;
> - new_crtc_state->has_drrs = old_crtc_state->has_drrs;
> }
>
> static int intel_crtc_add_planes_to_state(struct intel_atomic_state *state,
> @@ -14083,6 +14070,46 @@ static int intel_atomic_check(struct drm_device *dev,
> any_ms = true;
> }
>
> + /**
> + * Check if fastset is allowed by external dependencies like other
> + * pipes and transcoders.
> + *
> + * Right now it only forces a fullmodeset when the MST master
> + * transcoder did not changed but the pipe of the master transcoder
> + * needs a fullmodeset so all slaves also needs to do a fullmodeset.
> + */
> + for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
> + enum transcoder master = new_crtc_state->mst_master_transcoder;
> +
> + if (!intel_dp_mst_is_slave_trans(new_crtc_state) ||
> + needs_modeset(new_crtc_state))
> + continue;
> +
> + if (intel_dp_mst_master_trans_needs_modeset(state, master)) {
> + new_crtc_state->uapi.mode_changed = true;
> + new_crtc_state->update_pipe = false;
> + }
> + }
> +
> + for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> + new_crtc_state, i) {
> + if (needs_modeset(new_crtc_state))
> + continue;
> +
> + /*
> + * If we're not doing the full modeset we want to
> + * keep the current M/N values as they may be
> + * sufficiently different to the computed values
> + * to cause problems.
> + *
> + * FIXME: should really copy more fuzzy state here
> + */
> + new_crtc_state->fdi_m_n = old_crtc_state->fdi_m_n;
> + new_crtc_state->dp_m_n = old_crtc_state->dp_m_n;
> + new_crtc_state->dp_m2_n2 = old_crtc_state->dp_m2_n2;
> + new_crtc_state->has_drrs = old_crtc_state->has_drrs;
> + }
Jose, Ville, this is exactly how i would need to modeset all port synced crtcs
after the fastset check?
Ville had suggsted adding mdoeset_synced_crtcs() even before the compute_config or before the call
where port sync assignments happen, so in that function, it would look at the modeset_synced_old_crtc_states ?
Manasi
Manasi
> +
> if (any_ms && !check_digital_port_conflicts(state)) {
> DRM_DEBUG_KMS("rejecting conflicting digital port configuration\n");
> ret = EINVAL;
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index efd14b0b507b..4aba1d702a83 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -854,3 +854,17 @@ bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state)
> return crtc_state->mst_master_transcoder != INVALID_TRANSCODER &&
> crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder;
> }
> +
> +bool intel_dp_mst_master_trans_needs_modeset(struct intel_atomic_state *state,
> + enum transcoder master)
> +{
> + struct intel_crtc_state *new_crtc_state;
> + struct intel_crtc *crtc;
> + int i;
> +
> + for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i)
> + if (new_crtc_state->mst_master_transcoder == master)
> + return drm_atomic_crtc_needs_modeset(&new_crtc_state->uapi);
> +
> + return false;
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.h b/drivers/gpu/drm/i915/display/intel_dp_mst.h
> index 854724f68f09..72cb486f32ab 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.h
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.h
> @@ -8,6 +8,7 @@
>
> #include <linux/types.h>
>
> +struct intel_atomic_state;
> struct intel_digital_port;
> struct intel_crtc_state;
>
> @@ -16,5 +17,7 @@ void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port);
> int intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port);
> bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state);
> bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state);
> +bool intel_dp_mst_master_trans_needs_modeset(struct intel_atomic_state *state,
> + enum transcoder master);
>
> #endif /* __INTEL_DP_MST_H__ */
> --
> 2.24.1
>
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