drm/komeda: Add slave pipeline support
authorLowry Li (Arm Technology China) <Lowry.Li@arm.com>
Tue, 11 Jun 2019 11:13:39 +0000 (12:13 +0100)
committerLiviu Dudau <Liviu.Dudau@arm.com>
Wed, 19 Jun 2019 10:42:17 +0000 (11:42 +0100)
commit3b9dfa4ef28c7dfb847cd3f8f97e7b92686c3e76
tree4c7c5598a3950cf1cb8d22d1107d552d84eeb114
parenta407a65093937f6ced4a2ae30d3290088b41df87
drm/komeda: Add slave pipeline support

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>
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
drivers/gpu/drm/arm/display/komeda/komeda_kms.c
drivers/gpu/drm/arm/display/komeda/komeda_kms.h
drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
drivers/gpu/drm/arm/display/komeda/komeda_plane.c