mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 04:04:43 +01:00
Linux kernel source tree
eddb5ba91b
The Rockchip RK3588 SoC can also support LPDDR5 memory. This type of memory needs some special case handling in the rockchip-dfi driver. Add support for it in rockchip-dfi, as well as the needed GRF register definitions. This has been tested as returning both the right cycle count and bandwidth on a LPDDR5 board where the CKR bit is 1. I couldn't test whether the values are correct on a system where CKR is 0, as I'm not savvy enough with the Rockchip tooling to know whether this can be set in the DDR init blob. Downstream has some special case handling for a hardware version where not just the control bits differ, but also the register. Since I don't know whether that hardware version is in any production silicon, it's left unimplemented for now, with an error message urging users to report if they have such a system. There is a slight change of behaviour for non-LPDDR5 systems: instead of writing 0 as the control flags to the control register and pretending everything is alright if the memory type is unknown, we now explicitly return an error. Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Link: https://patchwork.kernel.org/project/linux-pm/patch/20250530-rk3588-dfi-improvements-v1-2-6e077c243a95@collabora.com/ |
||
|---|---|---|
| arch | ||
| block | ||
| 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 | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .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.