kernel/drivers/soc/qcom/qcom_stats.c, branch linux-6.2.y

soc: qcom: stats: Populate all subsystem debugfs files

2023-03-11T12:50:27Z

[ Upstream commit acdbf5f9b2c492505145f6e50c65418521a547c4 ] This driver relies on SMEM to populate items for each subsystem before the device probes. The items in SMEM that are being looked for are populated by the subsystems lazily, and therefore may not exist until the device has booted. For example, if I build this driver into the kernel on Trogdor Lazor and boot up, I don't see a 'modem' debugfs file populated, because the modem boots and populates the SMEM item after this driver probes. Always populate the files for the subsystems if they're in SMEM, and make the qcom_subsystem_sleep_stats_show() function return 0 if the SMEM items still isn't there. This way we can run a simple command like grep ^ /sys/kernel/debug/qcom_stats/* and collect the subsystem sleep stats without interspersed errors or missing details entirely because this driver probed first. Fixes: 1d7724690344 ("soc: qcom: Add Sleep stats driver") Cc: Matthias Kaehlcke Signed-off-by: Stephen Boyd Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20230119032329.2909383-1-swboyd@chromium.org Signed-off-by: Sasha Levin

soc: qcom: stats: Mark device as having no PM support

2022-10-17T22:58:15Z

This driver purely exposes information from memory to the kernel. Let's mark it as not having any device PM functionality, so that during suspend we skip even trying to call a suspend function on this device. This clears up suspend logs more than anything else, but it also shaves a few cycles off suspend. Cc: Konrad Dybcio Signed-off-by: Stephen Boyd Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20221015004934.3930651-2-swboyd@chromium.org

soc: qcom: stats: Add SDM845 stats config and compatible

2022-08-29T21:38:52Z

SDM845 is a special case compared to the other platforms that use RPMh stats, since it only has 2 stats (aosd and cxsd), while the others have a 3rd one (ddr). So lets add dedicated stats config and compatible for SDM845 to make the driver aware of this num_records difference. Signed-off-by: Abel Vesa Reviewed-by: Krzysztof Kozlowski Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20220812101240.1869605-2-abel.vesa@linaro.org

soc: qcom: stats: Add fixed sleep stats offset for older RPM firmwares

2021-12-21T01:10:09Z

Not all RPM firmware versions have the dynamic sleep stats offset available. Most older versions use a fixed offset of 0xdba0. Add support for this using new SoC-specific compatibles for APQ8084, MSM8226, MSM8916 and MSM8974. Even older SoCs seem to use a different offset and stats format. If needed those could be supported in the future by adding separate compatibles for those with a different stats_config. Cc: Maulik Shah Signed-off-by: Stephan Gerhold Reviewed-by: Bjorn Andersson Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20211119213953.31970-3-stephan@gerhold.net

soc: qcom: qcom_stats: Fix client votes offset

2021-10-24T04:35:42Z

Client votes starts at 0x20 offset. Correct the offset. Reported-and-suggested-by: Shawn Guo Fixes: 1d7724690344 ("soc: qcom: Add Sleep stats driver") Signed-off-by: Maulik Shah Reviewed-by: Shawn Guo Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/1634719753-26064-1-git-send-email-mkshah@codeaurora.org

soc: qcom: Add Sleep stats driver

2021-10-16T23:23:30Z

Let's add a driver to read the stats from remote processor and export to debugfs. The driver creates "qcom_sleep_stats" directory in debugfs and adds files for various low power mode available. Below is sample output with command cat /sys/kernel/debug/qcom_sleep_stats/ddr count = 0 Last Entered At = 0 Last Exited At = 0 Accumulated Duration = 0 Signed-off-by: Mahesh Sivasubramanian Signed-off-by: Lina Iyer [mkshah: add subsystem sleep stats, create one file for each stat] Signed-off-by: Maulik Shah Tested-by: Shawn Guo Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/1634107104-22197-3-git-send-email-mkshah@codeaurora.org