Komeda HW can support dual-link which splits display frame to two halves
(left/link0, right/link1) and output them by two output links.
Due to the halved pixel rate of each link, the pxlclk of dual-link can be
reduced two times compare with single-link.
For enabling dual-link:
- The DT need to configure two output-links for the pipeline node.
- Komeda enable dual-link when both link0 and link1 have been connected.
Example of how the pipeline node will look like for dual-link setup
pipe0: pipeline@0 {
clocks = <&fpgaosc2>;
clock-names = "pxclk";
reg = <0>;
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
#address-cells = <1>;
#size-cells = <0>;
dp0_pipe0_link0: endpoint@0 {
reg = <0>;
remote-endpoint = <&dlink_connector_in0>;
};
dp0_pipe0_link1: endpoint@1 {
reg = <1>;
remote-endpoint = <&dlink_connector_in1>;
};
};
};
James Qian Wang (Arm Technology China) (2):
drm/komeda: Use drm_display_mode "crtc_" prefixed hardware timings
drm/komeda: Enable dual-link support
.../arm/display/komeda/d71/d71_component.c | 42 +++++----
.../gpu/drm/arm/display/komeda/komeda_crtc.c | 89 +++++++++++++------
.../gpu/drm/arm/display/komeda/komeda_dev.c | 5 +-
.../gpu/drm/arm/display/komeda/komeda_drv.c | 8 +-
.../gpu/drm/arm/display/komeda/komeda_kms.h | 4 +-
.../drm/arm/display/komeda/komeda_pipeline.c | 19 +++-
.../drm/arm/display/komeda/komeda_pipeline.h | 6 +-
.../display/komeda/komeda_pipeline_state.c | 2 +-
8 files changed, 118 insertions(+), 57 deletions(-)
--
2.17.1
