Op 16-03-17 om 08:10 schreef Dhinakaran Pandiyan:
> From: "Pandiyan, Dhinakaran" <dhinakaran.pandi...@intel.com>
>
> Use the added helpers to track MST link bandwidth for atomic modesets.
> Link bw is acquired in the ->atomic_check() phase when CRTCs are being
> enabled with drm_atomic_find_vcpi_slots() instead of drm_find_vcpi_slots().
> Similarly, link bw is released during ->atomic_check() with the connector
> helper callback ->atomic_release() when CRTCs are disabled.
>
> v2:
> Squashed atomic_release() implementation and caller (Daniel)
> Fixed logic for connector-crtc switching case (Daniel)
> Fixed logic for suspend-resume case.
>
> Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
> Cc: Archit Taneja <arch...@codeaurora.org>
> Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Cc: Chris Wilson <ch...@chris-wilson.co.uk>
> Cc: Harry Wentland <harry.wentl...@amd.com>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_dp_mst.c | 38
> ++++++++++++++++++++++++++++++-------
> 1 file changed, 31 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c
> b/drivers/gpu/drm/i915/intel_dp_mst.c
> index c1f62eb..a8f40fa 100644
> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> @@ -39,9 +39,9 @@ static bool intel_dp_mst_compute_config(struct
> intel_encoder *encoder,
> struct intel_dp *intel_dp = &intel_dig_port->dp;
> struct intel_connector *connector =
> to_intel_connector(conn_state->connector);
> - struct drm_atomic_state *state;
> + struct drm_atomic_state *state = pipe_config->base.state;
> int bpp;
> - int lane_count, slots;
> + int lane_count, slots = 0;
> const struct drm_display_mode *adjusted_mode =
> &pipe_config->base.adjusted_mode;
> int mst_pbn;
>
> @@ -57,30 +57,53 @@ static bool intel_dp_mst_compute_config(struct
> intel_encoder *encoder,
> * seem to suggest we should do otherwise.
> */
> lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
> -
> pipe_config->lane_count = lane_count;
>
> pipe_config->pipe_bpp = bpp;
> pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
>
> - state = pipe_config->base.state;
> -
> if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
> pipe_config->has_audio = true;
> - mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
>
> + mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
> pipe_config->pbn = mst_pbn;
> - slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
>
> intel_link_compute_m_n(bpp, lane_count,
> adjusted_mode->crtc_clock,
> pipe_config->port_clock,
> &pipe_config->dp_m_n);
>
> + if (pipe_config->base.active) {
> + slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
> + connector->port, mst_pbn);
> + if (slots < 0) {
> + DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
> + return false;
> + }
> + }
> pipe_config->dp_m_n.tu = slots;
>
> return true;
> +}
> +
> +static void intel_dp_mst_atomic_release(struct drm_connector *connector,
> + struct drm_connector_state *conn_state)
> +{
> + struct intel_dp_mst_encoder *intel_mst;
> + struct drm_dp_mst_topology_mgr *mgr;
> + struct drm_encoder *encoder;
> + struct intel_connector *intel_connector = to_intel_connector(connector);
> + struct drm_atomic_state *state = conn_state->state;
> + int slots;
> +
> + encoder = connector->state->best_encoder;
> + intel_mst = enc_to_mst(encoder);
> + mgr = &intel_mst->primary->dp.mst_mgr;
>
> + slots = drm_dp_atomic_release_vcpi_slots(state, mgr,
> + intel_connector->port);
> + if (slots < 0)
> + DRM_DEBUG_KMS("failed releasing vcpi slots:%d\n", slots);
> }
>
> static void intel_mst_disable_dp(struct intel_encoder *encoder,
> @@ -387,6 +410,7 @@ static const struct drm_connector_helper_funcs
> intel_dp_mst_connector_helper_fun
> .mode_valid = intel_dp_mst_mode_valid,
> .atomic_best_encoder = intel_mst_atomic_best_encoder,
> .best_encoder = intel_mst_best_encoder,
> + .atomic_release = intel_dp_mst_atomic_release,
> };
>
> static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
Is there any issue into attempting to release vcpi slots when they're already
released? If not, for patches 1-3 5-8
Reviewed-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
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