Manikanta Maddireddy
2b7a4256cc
Programmed bits of register RP_VEND_XP_PAD_PWRDN are defined as follows, L1(bit[0]): This bit, when set, causes the analog pads to power down when we're in L1. When clear, the LTSSM still enters L1 as required, but the analog pads are left at full power. DYNAMIC(bit[1]): This bit, when set, causes unused analog pads to power down after "Dynamic Link Width Re-negotiation" takes place. When clear, all analog pads remain powered up, even those that are no longer being used after "Dynamic Link Width Re-negotiation" down-sizes the link. DISABLED(bit[2]): This bit, when set, causes the analog pads to power down when we're in the DISABLED_DOWN state. When clear, the LTSSM still enters DISBLED_DOWN as required, but the analog pads are left at full power. L1_CLKREQ(bit[15]): This bit, when set, causes the analog pads to power down to SLEEP_MODE_L1_REQ when clkreq signal is deasserted in L1. (NV_PROJ__PCIE2_RP_VEND_XP_PAD_PWRDN_L1 needs to be set in order to power down pad in L1.) Also, when clkreq is asserted in L1, ltssm will exit L1 immediately. When clear, the clkreq signal doesn't affect the power management. SLEEP_MODE_L1(bits[4:3]): It defines the 2-bit sleep-mode coding in the pad when LTSSM is in the L1 state or DISABLED state. SLEEP_MODE_DYNAMIC(bits[6:5]): It defines the 2-bit sleep-mode coding in the pad when the lane shut down due to dynamic link downsizing. SLEEP_MODE_L1_CLKREQ(bits[17:16]): It defines the 2-bit sleep-mode coding when clkreq is deasserted in L1. The 2-bit sleep-mode encoding is defined as: - L0 (0x0): Normal power-up mode - L1 (0x1): L1 power-down mode; Tx common mode on, Rx e-idle detect on - L1P (0x2): L1 power-down mode; Tx common mode off, Rx e-idle detect on - L1PP (0x3): L1 power-down mode; Tx common mode off, Rx e-idle detect off bug 200420606 Change-Id: I74aa9c1460d882084b1ecccb9c0168dd667c9d84 Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1786547 (cherry picked from commit d7899c186f89ecf503812003b743adbae07c4cbe) Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.9/+/2407873 Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
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.