Komeda HW can support side by side, which splits the internal display processing to two single halves (LEFT/RIGHT) and handle them by two pipelines separately. komeda "side by side" is enabled by DT property: "side_by_side_master", once DT configured side by side, komeda need to verify it with HW's configuration, and assemble it for the further usage.
v3: Correct a typo.
Signed-off-by: James Qian Wang (Arm Technology China) james.qian.wang@arm.com --- .../gpu/drm/arm/display/komeda/komeda_crtc.c | 13 ++++- .../gpu/drm/arm/display/komeda/komeda_dev.c | 4 ++ .../gpu/drm/arm/display/komeda/komeda_dev.h | 9 ++++ .../gpu/drm/arm/display/komeda/komeda_kms.h | 3 ++ .../drm/arm/display/komeda/komeda_pipeline.c | 50 +++++++++++++++++-- .../drm/arm/display/komeda/komeda_pipeline.h | 1 + 6 files changed, 74 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c index 1c452ea75999..cee9a1692e71 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c @@ -561,21 +561,30 @@ int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms, kms->n_crtcs = 0;
for (i = 0; i < mdev->n_pipelines; i++) { + /* if sbs, one komeda_dev only can represent one CRTC */ + if (mdev->side_by_side && i != mdev->side_by_side_master) + continue; + crtc = &kms->crtcs[kms->n_crtcs]; master = mdev->pipelines[i];
crtc->master = master; crtc->slave = komeda_pipeline_get_slave(master); + crtc->side_by_side = mdev->side_by_side;
if (crtc->slave) sprintf(str, "pipe-%d", crtc->slave->id); else sprintf(str, "None");
- DRM_INFO("CRTC-%d: master(pipe-%d) slave(%s).\n", - kms->n_crtcs, master->id, str); + DRM_INFO("CRTC-%d: master(pipe-%d) slave(%s) sbs(%s).\n", + kms->n_crtcs, master->id, str, + crtc->side_by_side ? "On" : "Off");
kms->n_crtcs++; + + if (mdev->side_by_side) + break; }
return 0; diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c index 4e46f650fddf..0d0e8e4ebc9d 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c @@ -178,6 +178,10 @@ static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev) } }
+ /* this DT node is experimental hence undocumented */ + mdev->side_by_side = !of_property_read_u32(np, "side_by_side_master", + &mdev->side_by_side_master); + return ret; }
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h index d406a4d83352..471604b42431 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h @@ -183,6 +183,15 @@ struct komeda_dev {
/** @irq: irq number */ int irq; + /** + * @side_by_side: + * + * on sbs the whole display frame will be split to two halves (1:2), + * master pipeline handles the left part, slave for the right part + */ + bool side_by_side; + /** @side_by_side_master: master pipe id for side by side */ + int side_by_side_master;
/** @lock: used to protect dpmode */ struct mutex lock; diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h index 456f3c435719..ae6654fe95e2 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h @@ -76,6 +76,9 @@ struct komeda_crtc { */ struct komeda_pipeline *slave;
+ /** @side_by_side: if the master and slave works on side by side mode */ + bool side_by_side; + /** @slave_planes: komeda slave planes mask */ u32 slave_planes;
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c index 452e505a1fd3..104e27cc1dc3 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c @@ -326,14 +326,56 @@ static void komeda_pipeline_assemble(struct komeda_pipeline *pipe) struct komeda_pipeline * komeda_pipeline_get_slave(struct komeda_pipeline *master) { - struct komeda_component *slave; + struct komeda_dev *mdev = master->mdev; + struct komeda_component *comp, *slave; + u32 avail_inputs; + + /* on SBS, slave pipeline merge to master via image processor */ + if (mdev->side_by_side) { + comp = &master->improc->base; + avail_inputs = KOMEDA_PIPELINE_IMPROCS; + } else { + comp = &master->compiz->base; + avail_inputs = KOMEDA_PIPELINE_COMPIZS; + }
- slave = komeda_component_pickup_input(&master->compiz->base, - KOMEDA_PIPELINE_COMPIZS); + slave = komeda_component_pickup_input(comp, avail_inputs);
return slave ? slave->pipeline : NULL; }
+static int komeda_assemble_side_by_side(struct komeda_dev *mdev) +{ + struct komeda_pipeline *master, *slave; + int i; + + if (!mdev->side_by_side) + return 0; + + if (mdev->side_by_side_master >= mdev->n_pipelines) { + DRM_ERROR("DT configured side by side master-%d is invalid.\n", + mdev->side_by_side_master); + return -EINVAL; + } + + master = mdev->pipelines[mdev->side_by_side_master]; + slave = komeda_pipeline_get_slave(master); + if (!slave || slave->n_layers != master->n_layers) { + DRM_ERROR("Current HW doesn't support side by side.\n"); + return -EINVAL; + } + + if (!master->dual_link) { + DRM_DEBUG_ATOMIC("SBS can not work without dual link.\n"); + return -EINVAL; + } + + for (i = 0; i < master->n_layers; i++) + master->layers[i]->sbs_slave = slave->layers[i]; + + return 0; +} + int komeda_assemble_pipelines(struct komeda_dev *mdev) { struct komeda_pipeline *pipe; @@ -346,7 +388,7 @@ int komeda_assemble_pipelines(struct komeda_dev *mdev) komeda_pipeline_dump(pipe); }
- return 0; + return komeda_assemble_side_by_side(mdev); }
void komeda_pipeline_dump_register(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 ac8725e24853..20a076cce635 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h @@ -237,6 +237,7 @@ struct komeda_layer { * not the source buffer. */ struct komeda_layer *right; + struct komeda_layer *sbs_slave; };
struct komeda_layer_state {