kernel/linux.git/drivers/soc/qcom/qcom_stats.c, branch linux-7.0.y

soc: qcom: qcom_stats: Add QMP support for syncing ddr stats

2025-06-17T14:12:08+00:00

Recent SoCs (SM8450 onwards) require QMP command to be sent before reading ddr stats. The duration field of ddr stats will get populated only if QMP command is sent. Add support to send ddr stats freqsync QMP command. Signed-off-by: Maulik Shah Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20250611-ddr_stats_-v5-2-24b16dd67c9c@oss.qualcomm.com Signed-off-by: Bjorn Andersson

soc: qcom: qcom_stats: Add support to read DDR statistic

2025-06-17T14:12:08+00:00

DDR statistic provide different DDR LPM and DDR frequency statistic. Add support to read from MSGRAM and display via debugfs. Reviewed-by: Konrad Dybcio Reviewed-by: Dmitry Baryshkov Signed-off-by: Maulik Shah Link: https://lore.kernel.org/r/20250611-ddr_stats_-v5-1-24b16dd67c9c@oss.qualcomm.com Signed-off-by: Bjorn Andersson

soc: Switch back to struct platform_driver::remove()

2024-11-01T16:08:57+00:00

After commit 0edb555a65d1 ("platform: Make platform_driver::remove() return void") .remove() is (again) the right callback to implement for platform drivers. Convert all platform drivers below drivers/soc to use .remove(), with the eventual goal to drop struct platform_driver::remove_new(). As .remove() and .remove_new() have the same prototypes, conversion is done by just changing the structure member name in the driver initializer. On the way do a few whitespace changes to make indention consistent. Signed-off-by: Uwe Kleine-König Acked-by: Heiko Stuebner Acked-by: Herve Codina # for fsl/qe/{qmc,tsa}.c Acked-by: Bjorn Andersson # qcom parts Acked-by: Gabriel Somlo Acked-by: Andrew Jeffery # aspeed Link: https://lore.kernel.org/r/20241029074859.509587-2-u.kleine-koenig@baylibre.com Signed-off-by: Arnd Bergmann

soc: qcom: qcom_stats: Add DSPs and apss subsystem stats

2024-03-18T03:19:08+00:00

Add SMEM items for compute, general purpose DSPs and application processor subsystem stats. Signed-off-by: Maulik Shah Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20240215-qcom_stats-v1-1-4a2cf83d0bdd@quicinc.com Signed-off-by: Bjorn Andersson

soc: qcom: qcom_stats: Convert to platform remove callback returning void

2023-10-02T18:30:22+00:00

The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König Acked-by: Konrad Dybcio # qcom Link: https://lore.kernel.org/r/20230925095532.1984344-25-u.kleine-koenig@pengutronix.de Signed-off-by: Bjorn Andersson

soc: qcom: stats: Populate all subsystem debugfs files

2023-02-06T20:13:30+00:00

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

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

2022-10-17T22:58:15+00:00

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

2022-08-29T21:38:52+00:00

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

2021-12-21T01:10:09+00:00

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

2021-10-24T04:35:42+00:00

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