On Thursday, 14 November 2019 08:37:31 GMT james qian wang (Arm Technology China) wrote:
> On side by side mode, The full display frame will be split into two parts
> (Left/Right), and each part will be handled by a single pipeline separately
> master pipeline for left part, slave for right.
>
> To simplify the usage and implementation, komeda use the following scheme
> to do the side by side split
> 1. The planes also have been grouped into two classes:
> master-planes and slave-planes.
> 2. The master plane can display its image on any location of the final/full
> display frame, komeda will help to split the plane configuration to two
> parts and fed them into master and slave pipelines.
> 3. The slave plane only can put its display rect on the right part of the
> final display frame, and its data is only can be fed into the slave
> pipeline.
>
> From the perspective of resource usage and assignment:
> The master plane can use the resources from the master pipeline and slave
> pipeline both, but slave plane only can use the slave pipeline resources.
>
> With such scheme, the usage of master planes are same as the none
> side_by_side mode. user can easily skip the slave planes and no need to
> consider side_by_side for them.
>
> Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@xxxxxxx>
> ---
> .../drm/arm/display/komeda/komeda_pipeline.h | 33 ++-
> .../display/komeda/komeda_pipeline_state.c | 188 ++++++++++++++++++
> .../gpu/drm/arm/display/komeda/komeda_plane.c | 7 +-
> 3 files changed, 220 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> index 20a076cce635..4c0946fbaac1 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> @@ -521,6 +521,20 @@ komeda_component_pickup_output(struct komeda_component *c, u32 avail_comps)
> return komeda_pipeline_get_first_component(c->pipeline, avail_inputs);
> }
>
> +static inline const char *
> +komeda_data_flow_msg(struct komeda_data_flow_cfg *config)
> +{
> + static char str[128];
> +
> + snprintf(str, sizeof(str),
> + "rot: %x src[x/y:%d/%d, w/h:%d/%d] disp[x/y:%d/%d, w/h:%d/%d]",
> + config->rot,
> + config->in_x, config->in_y, config->in_w, config->in_h,
> + config->out_x, config->out_y, config->out_w, config->out_h);
> +
> + return str;
> +}
> +
> struct komeda_plane_state;
> struct komeda_crtc_state;
> struct komeda_crtc;
> @@ -532,22 +546,27 @@ int komeda_build_layer_data_flow(struct komeda_layer *layer,
> struct komeda_plane_state *kplane_st,
> struct komeda_crtc_state *kcrtc_st,
> struct komeda_data_flow_cfg *dflow);
> -int komeda_build_wb_data_flow(struct komeda_layer *wb_layer,
> - struct drm_connector_state *conn_st,
> - struct komeda_crtc_state *kcrtc_st,
> - struct komeda_data_flow_cfg *dflow);
> -int komeda_build_display_data_flow(struct komeda_crtc *kcrtc,
> - struct komeda_crtc_state *kcrtc_st);
> -
> int komeda_build_layer_split_data_flow(struct komeda_layer *left,
> struct komeda_plane_state *kplane_st,
> struct komeda_crtc_state *kcrtc_st,
> struct komeda_data_flow_cfg *dflow);
> +int komeda_build_layer_sbs_data_flow(struct komeda_layer *layer,
> + struct komeda_plane_state *kplane_st,
> + struct komeda_crtc_state *kcrtc_st,
> + struct komeda_data_flow_cfg *dflow);
> +
> +int komeda_build_wb_data_flow(struct komeda_layer *wb_layer,
> + struct drm_connector_state *conn_st,
> + struct komeda_crtc_state *kcrtc_st,
> + struct komeda_data_flow_cfg *dflow);
> int komeda_build_wb_split_data_flow(struct komeda_layer *wb_layer,
> struct drm_connector_state *conn_st,
> struct komeda_crtc_state *kcrtc_st,
> struct komeda_data_flow_cfg *dflow);
>
> +int komeda_build_display_data_flow(struct komeda_crtc *kcrtc,
> + struct komeda_crtc_state *kcrtc_st);
> +
> int komeda_release_unclaimed_resources(struct komeda_pipeline *pipe,
> struct komeda_crtc_state *kcrtc_st);
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> index 0930234abb9d..5de0d231a1c3 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> @@ -1130,6 +1130,194 @@ int komeda_build_layer_split_data_flow(struct komeda_layer *left,
> return err;
> }
>
> +/* split func will split configuration of master plane to two layer data
> + * flows, which will be fed into master and slave pipeline then.
> + * NOTE: @m_dflow is first used as input argument to pass the configuration of
> + * master_plane. when the split is done, @*m_dflow @*s_dflow are the
> + * output data flow for pipeline.
> + */
> +static int
> +komeda_split_sbs_master_data_flow(struct komeda_crtc_state *kcrtc_st,
> + struct komeda_data_flow_cfg **m_dflow,
> + struct komeda_data_flow_cfg **s_dflow)
> +{
> + struct komeda_data_flow_cfg *master = *m_dflow;
> + struct komeda_data_flow_cfg *slave = *s_dflow;
> + u32 disp_end = master->out_x + master->out_w;
> + u16 boundary;
> +
> + pipeline_composition_size(kcrtc_st, &boundary, NULL);
> +
> + if (disp_end <= boundary) {
> + /* the master viewport only located in master side, no need
> + * slave anymore
> + */
> + *s_dflow = NULL;
> + } else if ((master->out_x < boundary) && (disp_end > boundary)) {
> + /* the master viewport across two pipelines, split it */
> + bool flip_h = has_flip_h(master->rot);
> + bool r90 = drm_rotation_90_or_270(master->rot);
> + u32 src_x = master->in_x;
> + u32 src_y = master->in_y;
> + u32 src_w = master->in_w;
> + u32 src_h = master->in_h;
> +
> + if (master->en_scaling || master->en_img_enhancement) {
> + DRM_DEBUG_ATOMIC("sbs doesn't support to split a scaling image.\n");
> + return -EINVAL;
> + }
> +
> + memcpy(slave, master, sizeof(*master));
> +
> + /* master for left part of display, slave for the right part */
> + /* split the disp_rect */
> + master->out_w = boundary - master->out_x;
> + slave->out_w = disp_end - boundary;
> + slave->out_x = 0;
> +
> + if (r90) {
> + master->in_h = master->out_w;
> + slave->in_h = slave->out_w;
> +
> + if (flip_h)
> + master->in_y = src_y + src_h - master->in_h;
> + else
> + slave->in_y = src_y + src_h - slave->in_h;
> + } else {
> + master->in_w = master->out_w;
> + slave->in_w = slave->out_w;
> +
> + /* on flip_h, the left display content from the right-source */
> + if (flip_h)
> + master->in_x = src_w + src_x - master->in_w;
> + else
> + slave->in_x = src_w + src_x - slave->in_w;
It really bugs me that the order here is w/x/w but in the block above
it's y/h/h.
> + }
> + } else if (master->out_x >= boundary) {
> + /* disp_rect only locate in right part, move the dflow to slave */
> + master->out_x -= boundary;
> + *s_dflow = master;
> + *m_dflow = NULL;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +komeda_split_sbs_slave_data_flow(struct komeda_crtc_state *kcrtc_st,
> + struct komeda_data_flow_cfg *slave)
> +{
> + u16 boundary;
> +
> + pipeline_composition_size(kcrtc_st, &boundary, NULL);
> +
> + if (slave->out_x < boundary) {
> + DRM_DEBUG_ATOMIC("SBS Slave plane is only allowed to configure the right part frame.\n");
> + return -EINVAL;
> + }
> +
> + /* slave->disp_rect locate in the right part */
> + slave->out_x -= boundary;
> +
> + return 0;
> +}
> +
> +/* On side by side mode, The full display frame will be split to two parts
> + * (Left/Right), and each part will be handled by a single pipeline separately,
> + * master pipeline for left part, slave for right.
> + *
> + * To simplify the usage and implementation, komeda use the following scheme
> + * to do the side by side split
> + * 1. The planes also have been grouped into two classes:
> + * master-planes and slave-planes.
> + * 2. The master plane can display its image on any location of the final/full
> + * display frame, komeda will help to split the plane configuration to two
> + * parts and fed them into master and slave pipelines.
> + * 3. The slave plane only can put its display rect on the right part of the
> + * final display frame, and its data is only can be fed into the slave
> + * pipeline.
> + *
> + * From the perspective of resource usage and assignment:
> + * The master plane can use the resources from the master pipeline and slave
> + * pipeline both, but slave plane only can use the slave pipeline resources.
> + *
> + * With such scheme, the usage of master planes are same as the none
> + * side_by_side mode. user can easily skip the slave planes and no need to
> + * consider side_by_side for them.
> + *
> + * NOTE: side_by_side split is occurred on pipeline level which split the plane
> + * data flow into pipelines, but the layer split is a pipeline
> + * internal split which splits the data flow into pipeline layers.
> + * So komeda still supports to apply a further layer split to the sbs
> + * split data flow.
> + */
> +int komeda_build_layer_sbs_data_flow(struct komeda_layer *layer,
> + struct komeda_plane_state *kplane_st,
> + struct komeda_crtc_state *kcrtc_st,
> + struct komeda_data_flow_cfg *dflow)
> +{
> + struct komeda_crtc *kcrtc = to_kcrtc(kcrtc_st->base.crtc);
> + struct drm_plane *plane = kplane_st->base.plane;
> + struct komeda_data_flow_cfg temp, *master_dflow, *slave_dflow;
> + struct komeda_layer *master, *slave;
> + bool master_plane = layer->base.pipeline == kcrtc->master;
> + int err;
> +
> + DRM_DEBUG_ATOMIC("SBS prepare %s-[PLANE:%d:%s]: %s.\n",
> + master_plane ? "Master" : "Slave",
> + plane->base.id, plane->name,
> + komeda_data_flow_msg(dflow));
> +
> + if (master_plane) {
> + master = layer;
> + slave = layer->sbs_slave;
> + master_dflow = dflow;
> + slave_dflow = &temp;
> + err = komeda_split_sbs_master_data_flow(kcrtc_st,
> + &master_dflow, &slave_dflow);
> + } else {
> + master = NULL;
> + slave = layer;
> + master_dflow = NULL;
> + slave_dflow = dflow;
> + err = komeda_split_sbs_slave_data_flow(kcrtc_st, slave_dflow);
> + }
> +
> + if (err)
> + return err;
> +
> + if (master_dflow) {
> + DRM_DEBUG_ATOMIC("SBS Master-%s assigned: %s\n",
> + master->base.name, komeda_data_flow_msg(master_dflow));
> +
> + if (master_dflow->en_split)
> + err = komeda_build_layer_split_data_flow(master,
> + kplane_st, kcrtc_st, master_dflow);
> + else
> + err = komeda_build_layer_data_flow(master,
> + kplane_st, kcrtc_st, master_dflow);
> +
> + if (err)
> + return err;
> + }
> +
> + if (slave_dflow) {
> + DRM_DEBUG_ATOMIC("SBS Slave-%s assigned: %s\n",
> + slave->base.name, komeda_data_flow_msg(slave_dflow));
> +
> + if (slave_dflow->en_split)
> + err = komeda_build_layer_split_data_flow(slave,
> + kplane_st, kcrtc_st, slave_dflow);
> + else
> + err = komeda_build_layer_data_flow(slave,
> + kplane_st, kcrtc_st, slave_dflow);
> + if (err)
> + return err;
> + }
> +
> + return 0;
> +}
> +
> /* writeback data path: compiz -> scaler -> wb_layer -> memory */
> int komeda_build_wb_data_flow(struct komeda_layer *wb_layer,
> struct drm_connector_state *conn_st,
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> index 98e915e325dd..2644f0727570 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> @@ -77,6 +77,7 @@ komeda_plane_atomic_check(struct drm_plane *plane,
> struct komeda_plane_state *kplane_st = to_kplane_st(state);
> struct komeda_layer *layer = kplane->layer;
> struct drm_crtc_state *crtc_st;
> + struct komeda_crtc *kcrtc;
> struct komeda_crtc_state *kcrtc_st;
> struct komeda_data_flow_cfg dflow;
> int err;
> @@ -94,13 +95,17 @@ komeda_plane_atomic_check(struct drm_plane *plane,
> if (!crtc_st->active)
> return 0;
>
> + kcrtc = to_kcrtc(crtc_st->crtc);
> kcrtc_st = to_kcrtc_st(crtc_st);
>
> err = komeda_plane_init_data_flow(state, kcrtc_st, &dflow);
> if (err)
> return err;
>
> - if (dflow.en_split)
> + if (kcrtc->side_by_side)
> + err = komeda_build_layer_sbs_data_flow(layer,
> + kplane_st, kcrtc_st, &dflow);
> + else if (dflow.en_split)
> err = komeda_build_layer_split_data_flow(layer,
> kplane_st, kcrtc_st, &dflow);
> else
>
--
Mihail
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