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Linux kernel source tree
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It is impossible to add each and every possible DDP path combination for each and every possible combination of SoC and board: right now, this driver hardcodes configuration for 10 SoCs and this is going to grow larger and larger, and with new hacks like the introduction of mtk_drm_route which is anyway not enough for all final routes as the DSI cannot be connected to MERGE if it's not a dual-DSI, or enabling DSC preventively doesn't work if the display doesn't support it, or others. Since practically all display IPs in MediaTek SoCs support being interconnected with different instances of other, or the same, IPs or with different IPs and in different combinations, the final DDP pipeline is effectively a board specific configuration. Implement OF graphs support to the mediatek-drm drivers, allowing to stop hardcoding the paths, and preventing this driver to get a huge amount of arrays for each board and SoC combination, also paving the way to share the same mtk_mmsys_driver_data between multiple SoCs, making it more straightforward to add support for new chips. Note that the OVL_ADAPTOR software component driver needs relatively big changes in order to fully support OF Graphs (and more SoCs anyway) and such changes will come at a later time. As of now, the mtk_disp_ovl_adaptor driver takes the MERGE components (for example, on mt8195, merge 1 to 4) dynamically so, even though later updates to the ovl-adaptor driver will *not* require bindings changes, the merge1-4 will be temporarily omitted in the graph for the MT8195 SoC. This means that an example graph for this SoC looks like: mdp_rdma (0 ~ 7) -> padding (0 ~ 7) -> ethdr -> merge5 and the resulting path in this driver will be `ovl_adaptor -> merge5` Later updates to the ovl adaptor will expand it to support more SoCs and, in turn, to also fully support graphs. Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com> Tested-by: Alexandre Mergnat <amergnat@baylibre.com> Acked-by: Sui Jingfeng <sui.jingfeng@linux.dev> Tested-by: Michael Walle <mwalle@kernel.org> # on kontron-sbc-i1200 Reviewed-by: CK Hu <ck.hu@mediatek.com> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://patchwork.kernel.org/project/dri-devel/patch/20241017103809.156056-4-angelogioacchino.delregno@collabora.com/ Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org> |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.