drm/komeda: Add writeback support
authorjames qian wang (Arm Technology China) <james.qian.wang@arm.com>
Thu, 23 May 2019 09:36:38 +0000 (10:36 +0100)
committerLiviu Dudau <Liviu.Dudau@arm.com>
Wed, 19 Jun 2019 10:42:16 +0000 (11:42 +0100)
commit5d51f6c0da1b563e2f8eb5022a4d7748aa687be4
tree5b64db60a37ddf437a493d5b96096f9648fed90c
parent52d2d44eee8091e740d0d275df1311fb8373c9a9
drm/komeda: Add writeback support

Komeda driver uses a individual component to describe the HW's writeback
caps, but drivers doesn't define a new structure and still uses the
existing "struct komeda_layer" to describe this new component.
The detailed changes as follow:

1. Initialize wb_layer according to HW and report it to CORE.
2. CORE exposes wb_layer as a resource to KMS by private_obj.
3. Report writeback supporting by add a wb_connector to KMS, and then
   wb_connector will take act as a component resources user,
   so the func komeda_wb_encoder_atomic_check claims komeda resources
   (scaler and wb_layer) accroding to its state configuration to the
   wb_connector. and the wb_state configuration will be validated on the
   specific component resources to see if the caps of component can
   meet the requirement of wb_connector. if not check failed.
4. Update irq_handler to notify the completion of writeback.

NOTE:
This change doesn't add scaling writeback support, that support will
be added in the future after the scaler support.

v2: Rebase
v3: Rebase and constify the d71_wb_layer_funcs
v4: Addressed Ayan's comments

Depends on:
- https://patchwork.freedesktop.org/series/59915/

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Acked-by: Ayan Kumar Halder <ayan.halder@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
drivers/gpu/drm/arm/display/komeda/Makefile
drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.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.h
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c
drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c [new file with mode: 0644]