On Fri, Sep 09, 2022 at 12:14:24PM +0300, Dmitry Baryshkov wrote: > Programming of QMP PCIe PHYs slightly differs between RC and EP modes. > > Currently both qcom and qcom-ep PCIe controllers setup the PHY in the > default mode, making it impossible to select at runtime whether the PHY > should be running in RC or in EP modes. Usually this is not an issue, > since for most devices only the RC mode is used. Some devices (SDX55) > currently support only the EP mode without supporting the RC mode (at > this moment). > > Nevertheless some of the Qualcomm platforms (e.g. the aforementioned > SDX55) would still benefit from being able to switch between RC and EP > depending on the driver being used. While it is possible to use > different compat strings for the PHY depending on the mode, it seems > like an incorrect approach, since the PHY doesn't differ between > usecases. It's the PCIe controller, who should decide how to configure > the PHY. > > This patch series implements the ability to select between RC and EP > modes, by allowing the PCIe QMP PHY driver to switch between > programming tables. > > Unlike previous iterations, this series brings in the dependecy from > PCI parts onto the first patch. Merging of PHY and PCI parts should be > coordinated by the maintainers (e.g. by putting the first patch into the > immutable branch). > > Changes since v2: > - Added PHY_SUBMODE_PCIE_RC/EP defines (Vinod), > - Changed `primary' table name to `main', added extra comments > describing that `secondary' are the additional tables, not required in > most of the cases (following the suggestion by Johan to rename > `primary' table), This wasn't really what I suggested. "main" is in itself is no more understandable than "primary". Please take another look at: https://lore.kernel.org/all/Yw2+aVbqBfMSUcWq@xxxxxxxxxxxxxxxxxxxx/ Johan
