nvidia-tegra-modules.git/drivers/cpufreq, branch gpu-paging

cpufreq: t194: set req. to Fmin when CPU offline

2021-04-14T17:39:55+00:00

Since offline CPU should not join cluster frequency
judgement, set cpufreq request to Fmin during cpu_down
to let cluster frequency judgement logic won't take
offline CPUs into account.

During cpu_up the cpufreq request value need to restored
as latest requested level (from cpufreq governor).
Add an per-CPU array 'latest_freq_req' to memorize
latest request level.

Register CPUHP_AP_TEGRA_CPUFREQ cpuhp callback
to do related ndiv operations due to following reasons
- The ndiv of a CPU can only be accessed by the same CPU.
- ndiv restore need to be handled as soon as possible
  since cluster PLL frequency = Fmin during cpu_up() of
  1st core in a cluster until ndiv value restored.

Bug 200610512

Change-Id: I60fe3f3aca58f51357b1e2a10a639427049b8b67
Signed-off-by: Aaron Tian 
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2467766
(cherry picked from commit e2cb988601c600d3f5c4fdbe19821bc1392dfbce)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2513653
Reviewed-by: svcacv 
Reviewed-by: svc-mobile-coverity 
Reviewed-by: Bibek Basu 
Reviewed-by: mobile promotions 
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions

cpufreq: do not access devd_pub in hv mode

2020-12-08T10:09:22+00:00

Because edvd_pub is not initialized
if "nvidia,tegra18x-cpufreq-hv" is enabled in device tree,
function accessing edvd_pub like get_hint/get_hint
should not be used in hv mode.

Bug 3192088

Change-Id: Ia29fd1c57688732d7d28310081b4eb676fc3944f
Signed-off-by: Alvin Park 
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2453230
Reviewed-by: automaticguardword 
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Hardik T Shah 
Reviewed-by: Phoenix Jung 
Reviewed-by: mobile promotions 
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions

cpufreq: t194: set req. to Fmin when CPU offline

2020-05-15T09:38:55+00:00

Offlined CPU should not join cluster frequency judgement.

Set cpufreq request to Fmin when a CPU offline, so
cluster frequency judgement logic won't take offlined CPUs
into account.

Bug 200610512

Change-Id: Id93b57c22971725b66385258642149f8d0051f0d
Signed-off-by: Aaron Tian 
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2339622
Reviewed-by: automaticguardword 
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Rajkumar Kasirajan 
Reviewed-by: Sumit Gupta 
Reviewed-by: Puneet Saxena 
Reviewed-by: Bibek Basu 
Reviewed-by: mobile promotions 
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions

cpufreq: tegra186: fix hv mode error path

2020-01-22T17:10:07+00:00

If tegra_cpufreq_hv_mode is true and parse_hv_dt_data fails, we
shouldn't go to err_free_res as platform resources are not
allocated/mapped in case of hv mode. Also, we have not reached to the
point to register_with_emc_bwmgr or get_lut_from_bpmp, so branching to
err_free_res and ending up calling free_resources as well as
free_shared_lut is incorrect.

Bug 200512604

Change-Id: Ifb30e44c67b9eef22d2ef2e46fac33da7df5dc13
Signed-off-by: Leon Yu 
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2275514
GVS: Gerrit_Virtual_Submit
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sumit Gupta 
Reviewed-by: Puneet Saxena 
Reviewed-by: Bibek Basu 
Reviewed-by: mobile promotions 
Tested-by: mobile promotions

cpufreq: t194: use CPU to EMC freq mapping helpers

2019-10-11T15:35:07+00:00

This CL replaces existing CPU to EMC mapping related code with common
helpers to eliminate inconsistencies between cpufreq drivers including:

1) different implementations of same functionality
2) different formats of CPU to EMC freq. mapping table

This change also prevents one potential bug that existing code only
works for mapping table which is sorted in descending order (won't
work in ascending order). The helper function to be used don't have
such constrain.

Bug 200551611
Bug 200512604

Change-Id: I199219b9a9b0bda10f1f6b941101e7ca24f878ac
Signed-off-by: Leon Yu 
Reviewed-on: https://git-master.nvidia.com/r/2198539
Reviewed-by: Aaron Tian 
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bo Yan 
Reviewed-by: mobile promotions 
Tested-by: mobile promotions

cpufreq: consolidate cpufreq_cpu_emc_table

2019-10-09T15:39:54+00:00

tegra_cpufreq_cpu_emc_map_dt_init() didn't consider the case that
cpu_emc_map provided in DT can be incomplete, e.g. like this:

cpu_emc_map = <2112000  2133000>,
                <1881600 800000>,
                <1574400 665000>,
                <1267200>;

We should strip incomplete entry as we already do for tegra194_cpufreq
so that driver won't have unknown/undefined behavior.

Bug 200512604
Bug 200551611

Change-Id: Ifad5e8a987bbd92b83cfd4cb1a649c3b61dfd072
Signed-off-by: Leon Yu 
Reviewed-on: https://git-master.nvidia.com/r/2212825
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Bo Yan 
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu 
Reviewed-by: mobile promotions 
Tested-by: mobile promotions

cpufreq: tegra186: allow CPU EMC table from DT

2019-09-11T16:10:35+00:00

Currently T186 cpufreq driver uses only preset CPU to EMC frequency
mapping table embedded in the driver and therefore makes it difficult
to use custom table tuned for different platforms or needs. This
change enables the driver to use mapping table from device tree and
also creates a debugfs entry to show mapping table being used by the
driver. Doing so will align with what have been done for T194.

Bug 200512604

Change-Id: I018e5903782024175071a779a6e00d1be21fe6e2
Signed-off-by: Leon Yu 
Reviewed-on: https://git-master.nvidia.com/r/2178285
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu 
Reviewed-by: mobile promotions 
Tested-by: mobile promotions

cpufreq: tegra186: use tegra_cpu_to_emc_freq helper

2019-09-10T09:23:52+00:00

This changes existing hard-coded logic to a helper with lookup table,
while keeps previous mapping table unchanged as default.

Bug 200512604

Change-Id: I70b1fcd46ee6ebfc5853c78e9ab8248e20f4ecb8
Signed-off-by: Leon Yu 
Reviewed-on: https://git-master.nvidia.com/r/2178284
Reviewed-by: Puneet Saxena 
Reviewed-by: Bibek Basu 
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions 
Tested-by: mobile promotions

cpufreq: introduce CPU EMC mapping table helper

2019-09-10T09:23:43+00:00

We've been using duplicate code and incompatible format/name/type for
CPU to EMC frequency mapping table related stuffs on different SoCs.
This not only confuses users but also makes it difficult to customize
and maintain these mapping tables.

This change aims to provide unified interfaces and structures that can
be used by existing (and also future) cpufreq drivers.

Bug 200512604

Change-Id: I380235c05ac045fe09ecdf4bd313e8c40286260a
Signed-off-by: Leon Yu 
Reviewed-on: https://git-master.nvidia.com/r/2183389
Reviewed-by: Puneet Saxena 
Reviewed-by: Bibek Basu 
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions 
Tested-by: mobile promotions

cpufreq: t194: add debugfs to show CPU/EMC mapping table

2019-07-30T00:57:22+00:00

Add 'cpu_emc_map' debugfs node to show current CPU/EMC mapping.

Bug 200533301

Change-Id: I0b4e9c4d4f230f09fc7de942377cde41337c88b9
Signed-off-by: Aaron Tian 
Reviewed-on: https://git-master.nvidia.com/r/2160378
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu 
Reviewed-by: mobile promotions 
Tested-by: mobile promotions