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Subject[PATCH v2 1/2] drm/komeda: Add slave pipeline support
Date
From: "Lowry Li (Arm Technology China)" <Lowry.Li@arm.com>

One crtc can use two komeda_pipeline, and one works as master and as
slave. the slave pipeline doesn't have its own output and timing
ctrlr, but pre-composite the input layer data flow and then feed the
result to master. the pipeline configuration like:

slave-layer-0 \
... slave->CU
slave-layer-4 / \
\
master-layer-0 --------> master->CU -> ...
... /
master-layer-4 ------>

Since komeda Compiz doesn't output alpha, so the slave->CU result
only can be used as bottom input when blend it with master input data
flows.

Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@arm.com>
---
drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 41 ++++++++++++++++++++--
drivers/gpu/drm/arm/display/komeda/komeda_kms.c | 10 ++++++
drivers/gpu/drm/arm/display/komeda/komeda_kms.h | 9 +++++
.../gpu/drm/arm/display/komeda/komeda_pipeline.c | 22 ++++++++++++
.../gpu/drm/arm/display/komeda/komeda_pipeline.h | 2 ++
.../drm/arm/display/komeda/komeda_pipeline_state.c | 15 ++++++++
drivers/gpu/drm/arm/display/komeda/komeda_plane.c | 32 ++++++++++++++++-
7 files changed, 128 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index a2d656f..cafb445 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -64,6 +64,10 @@ static void komeda_crtc_update_clock_ratio(struct komeda_crtc_state *kcrtc_st)
}

/* release unclaimed pipeline resources */
+ err = komeda_release_unclaimed_resources(kcrtc->slave, kcrtc_st);
+ if (err)
+ return err;
+
err = komeda_release_unclaimed_resources(kcrtc->master, kcrtc_st);
if (err)
return err;
@@ -226,6 +230,7 @@ void komeda_crtc_handle_event(struct komeda_crtc *kcrtc,
struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc->state);
struct komeda_dev *mdev = kcrtc->base.dev->dev_private;
struct komeda_pipeline *master = kcrtc->master;
+ struct komeda_pipeline *slave = kcrtc->slave;
struct komeda_wb_connector *wb_conn = kcrtc->wb_conn;
struct drm_connector_state *conn_st;

@@ -237,6 +242,9 @@ void komeda_crtc_handle_event(struct komeda_crtc *kcrtc,
if (has_bit(master->id, kcrtc_st->affected_pipes))
komeda_pipeline_update(master, old->state);

+ if (slave && has_bit(slave->id, kcrtc_st->affected_pipes))
+ komeda_pipeline_update(slave, old->state);
+
conn_st = wb_conn ? wb_conn->base.base.state : NULL;
if (conn_st && conn_st->writeback_job)
drm_writeback_queue_job(&wb_conn->base, conn_st);
@@ -262,6 +270,7 @@ void komeda_crtc_handle_event(struct komeda_crtc *kcrtc,
struct komeda_crtc_state *old_st = to_kcrtc_st(old);
struct komeda_dev *mdev = crtc->dev->dev_private;
struct komeda_pipeline *master = kcrtc->master;
+ struct komeda_pipeline *slave = kcrtc->slave;
struct completion *disable_done = &crtc->state->commit->flip_done;
struct completion temp;
int timeout;
@@ -270,6 +279,9 @@ void komeda_crtc_handle_event(struct komeda_crtc *kcrtc,
drm_crtc_index(crtc),
old_st->active_pipes, old_st->affected_pipes);

+ if (slave && has_bit(slave->id, old_st->active_pipes))
+ komeda_pipeline_disable(slave, old->state);
+
if (has_bit(master->id, old_st->active_pipes))
komeda_pipeline_disable(master, old->state);

@@ -414,6 +426,7 @@ static void komeda_crtc_reset(struct drm_crtc *crtc)

new->affected_pipes = old->active_pipes;
new->clock_ratio = old->clock_ratio;
+ new->max_slave_zorder = old->max_slave_zorder;

return &new->base;
}
@@ -488,7 +501,7 @@ int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms,
master = mdev->pipelines[i];

crtc->master = master;
- crtc->slave = NULL;
+ crtc->slave = komeda_pipeline_get_slave(master);

if (crtc->slave)
sprintf(str, "pipe-%d", crtc->slave->id);
@@ -522,6 +535,26 @@ static int komeda_crtc_create_clock_ratio_property(struct komeda_crtc *kcrtc)
return 0;
}

+static int komeda_crtc_create_slave_planes_property(struct komeda_crtc *kcrtc)
+{
+ struct drm_crtc *crtc = &kcrtc->base;
+ struct drm_property *prop;
+
+ if (kcrtc->slave_planes == 0)
+ return 0;
+
+ prop = drm_property_create_range(crtc->dev, DRM_MODE_PROP_IMMUTABLE,
+ "slave_planes", 0, U32_MAX);
+ if (!prop)
+ return -ENOMEM;
+
+ drm_object_attach_property(&crtc->base, prop, kcrtc->slave_planes);
+
+ kcrtc->slave_planes_property = prop;
+
+ return 0;
+}
+
static struct drm_plane *
get_crtc_primary(struct komeda_kms_dev *kms, struct komeda_crtc *crtc)
{
@@ -562,7 +595,11 @@ static int komeda_crtc_add(struct komeda_kms_dev *kms,
if (err)
return err;

- return 0;
+ err = komeda_crtc_create_slave_planes_property(kcrtc);
+ if (err)
+ return err;
+
+ return err;
}

int komeda_kms_add_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
index 5d10c55..8543860 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
@@ -143,6 +143,8 @@ static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
struct drm_crtc_state *crtc_st)
{
struct drm_atomic_state *state = crtc_st->state;
+ struct komeda_crtc *kcrtc = to_kcrtc(crtc);
+ struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
struct komeda_plane_state *kplane_st;
struct drm_plane_state *plane_st;
struct drm_framebuffer *fb;
@@ -167,6 +169,8 @@ static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
return err;
}

+ kcrtc_st->max_slave_zorder = 0;
+
list_for_each_entry(kplane_st, &zorder_list, zlist_node) {
plane_st = &kplane_st->base;
fb = plane_st->fb;
@@ -185,6 +189,12 @@ static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] zpos:%d, normalized zpos: %d\n",
plane->base.id, plane->name,
plane_st->zpos, plane_st->normalized_zpos);
+
+ /* calculate max slave zorder */
+ if (has_bit(drm_plane_index(plane), kcrtc->slave_planes))
+ kcrtc_st->max_slave_zorder =
+ max(plane_st->normalized_zpos,
+ kcrtc_st->max_slave_zorder);
}

crtc_st->zpos_changed = true;
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
index 9dcfe5a..219fa3f 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
@@ -86,6 +86,9 @@ struct komeda_crtc {
*/
struct komeda_pipeline *slave;

+ /** @slave_planes: komeda slave planes mask */
+ u32 slave_planes;
+
/** @wb_conn: komeda write back connector */
struct komeda_wb_connector *wb_conn;

@@ -94,6 +97,9 @@ struct komeda_crtc {

/** @clock_ratio_property: property for ratio of (aclk << 32)/pxlclk */
struct drm_property *clock_ratio_property;
+
+ /** @slave_planes_property: property for slaves of the planes */
+ struct drm_property *slave_planes_property;
};

/**
@@ -119,6 +125,9 @@ struct komeda_crtc_state {

/** @clock_ratio: ratio of (aclk << 32)/pxlclk */
u64 clock_ratio;
+
+ /** @max_slave_zorder: the maximum of slave zorder */
+ u32 max_slave_zorder;
};

/** struct komeda_kms_dev - for gather KMS related things */
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
index eb9e0c0..a3d90d8 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
@@ -142,6 +142,14 @@ struct komeda_component *
return c;
}

+static struct komeda_component *
+komeda_component_pickup_input(struct komeda_component *c, u32 avail_comps)
+{
+ u32 avail_inputs = c->supported_inputs & (avail_comps);
+
+ return komeda_pipeline_get_first_component(c->pipeline, avail_inputs);
+}
+
/** komeda_component_add - Add a component to &komeda_pipeline */
struct komeda_component *
komeda_component_add(struct komeda_pipeline *pipe,
@@ -296,6 +304,20 @@ static void komeda_pipeline_assemble(struct komeda_pipeline *pipe)
}
}

+/* if pipeline_A accept another pipeline_B's component as input, treat
+ * pipeline_B as slave of pipeline_A.
+ */
+struct komeda_pipeline *
+komeda_pipeline_get_slave(struct komeda_pipeline *master)
+{
+ struct komeda_component *slave;
+
+ slave = komeda_component_pickup_input(&master->compiz->base,
+ KOMEDA_PIPELINE_COMPIZS);
+
+ return slave ? slave->pipeline : NULL;
+}
+
int komeda_assemble_pipelines(struct komeda_dev *mdev)
{
struct komeda_pipeline *pipe;
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
index f6a4a51..2a67c8a 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
@@ -452,6 +452,8 @@ struct komeda_pipeline *
const struct komeda_pipeline_funcs *funcs);
void komeda_pipeline_destroy(struct komeda_dev *mdev,
struct komeda_pipeline *pipe);
+struct komeda_pipeline *
+komeda_pipeline_get_slave(struct komeda_pipeline *master);
int komeda_assemble_pipelines(struct komeda_dev *mdev);
struct komeda_component *
komeda_pipeline_get_component(struct komeda_pipeline *pipe, int id);
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 23182ed..6c35afd 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -1032,10 +1032,25 @@ int komeda_build_display_data_flow(struct komeda_crtc *kcrtc,
struct komeda_crtc_state *kcrtc_st)
{
struct komeda_pipeline *master = kcrtc->master;
+ struct komeda_pipeline *slave = kcrtc->slave;
struct komeda_data_flow_cfg m_dflow; /* master data flow */
+ struct komeda_data_flow_cfg s_dflow; /* slave data flow */
int err;

memset(&m_dflow, 0, sizeof(m_dflow));
+ memset(&s_dflow, 0, sizeof(s_dflow));
+
+ if (slave && has_bit(slave->id, kcrtc_st->active_pipes)) {
+ err = komeda_compiz_validate(slave->compiz, kcrtc_st, &s_dflow);
+ if (err)
+ return err;
+
+ /* merge the slave dflow into master pipeline */
+ err = komeda_compiz_set_input(master->compiz, kcrtc_st,
+ &s_dflow);
+ if (err)
+ return err;
+ }

err = komeda_compiz_validate(master->compiz, kcrtc_st, &m_dflow);
if (err)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index d1c58a8..04b122f 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -14,15 +14,27 @@

static int
komeda_plane_init_data_flow(struct drm_plane_state *st,
+ struct komeda_crtc_state *kcrtc_st,
struct komeda_data_flow_cfg *dflow)
{
+ struct komeda_plane *kplane = to_kplane(st->plane);
struct komeda_plane_state *kplane_st = to_kplane_st(st);
struct drm_framebuffer *fb = st->fb;
const struct komeda_format_caps *caps = to_kfb(fb)->format_caps;
+ struct komeda_pipeline *pipe = kplane->layer->base.pipeline;

memset(dflow, 0, sizeof(*dflow));

dflow->blending_zorder = st->normalized_zpos;
+ if (pipe == to_kcrtc(st->crtc)->master)
+ dflow->blending_zorder -= kcrtc_st->max_slave_zorder;
+ if (dflow->blending_zorder < 0) {
+ DRM_DEBUG_ATOMIC("%s zorder:%d < max_slave_zorder: %d.\n",
+ st->plane->name, st->normalized_zpos,
+ kcrtc_st->max_slave_zorder);
+ return -EINVAL;
+ }
+
dflow->pixel_blend_mode = st->pixel_blend_mode;
dflow->layer_alpha = st->alpha >> 8;

@@ -88,7 +100,7 @@

kcrtc_st = to_kcrtc_st(crtc_st);

- err = komeda_plane_init_data_flow(state, &dflow);
+ err = komeda_plane_init_data_flow(state, kcrtc_st, &dflow);
if (err)
return err;

@@ -288,6 +300,22 @@ static u32 get_possible_crtcs(struct komeda_kms_dev *kms,
return possible_crtcs;
}

+static void
+komeda_set_crtc_plane_mask(struct komeda_kms_dev *kms,
+ struct komeda_pipeline *pipe,
+ struct drm_plane *plane)
+{
+ struct komeda_crtc *kcrtc;
+ int i;
+
+ for (i = 0; i < kms->n_crtcs; i++) {
+ kcrtc = &kms->crtcs[i];
+
+ if (pipe == kcrtc->slave)
+ kcrtc->slave_planes |= BIT(drm_plane_index(plane));
+ }
+}
+
/* use Layer0 as primary */
static u32 get_plane_type(struct komeda_kms_dev *kms,
struct komeda_component *c)
@@ -366,6 +394,8 @@ static int komeda_plane_add(struct komeda_kms_dev *kms,
if (err)
goto cleanup;

+ komeda_set_crtc_plane_mask(kms, c->pipeline, plane);
+
return 0;
cleanup:
komeda_plane_destroy(plane);
--
1.9.1
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