From: Hiago De Franco <hiago.fra...@toradex.com> This patch series depends on Ulf's patches that are currently under review, "pmdomain: Add generic ->sync_state() support to genpd" [1]. Without them, this series is not going to work.
For the i.MX8X and i.MX8 family SoCs, currently when the remotecore is started by the bootloader and the M core and A core are in the same partition, the driver is not capable to detect the remote core and report the correct state of it. This patch series implement a new function, dev_pm_genpd_is_on(), which returns the power status of a given power domain (M core power domains IMX_SC_R_M4_0_PID0 and IMX_SC_R_M4_0_MU_1A in this case). If it is already powered on, the driver will attach to it. Finally, the imx_rproc_clk_enable() function was also changed to make it return before dev_clk_get() is called, as it currently generates an SCU fault reset if the remote core is already running and the kernel tries to enable the clock again. These changes are a follow up from a v1 sent to imx_rproc [2] and from a reported regression [3]. [1] https://lore.kernel.org/all/20250523134025.75130-1-ulf.hans...@linaro.org/ [2] https://lore.kernel.org/lkml/20250423155131.101473-1-hiagofra...@gmail.com/ [3] https://lore.kernel.org/lkml/20250404141713.ac2ntcsjsf7epdfa@hiago-nb/ v4: - dev_pm_genpd_is_on() introduced to drivers/pmdomain/core.c - imx_rproc.c updated to use the generic power domains instead of the SCU API call, which depends on Ulf's patch series. v3: - https://lore.kernel.org/all/20250519171514.61974-1-hiagofra...@gmail.com/ v2: - https://lore.kernel.org/lkml/20250507160056.11876-1-hiagofra...@gmail.com/ v1: - https://lore.kernel.org/lkml/20250505154849.64889-1-hiagofra...@gmail.com/ Hiago De Franco (3): pmdomain: core: introduce dev_pm_genpd_is_on remoteproc: imx_rproc: skip clock enable when M-core is managed by the SCU remoteproc: imx_rproc: detect and attach to pre-booted remote cores drivers/pmdomain/core.c | 27 +++++++++++++++++++++++++++ drivers/remoteproc/imx_rproc.c | 33 ++++++++++++++++++++++++++------- include/linux/pm_domain.h | 6 ++++++ 3 files changed, 59 insertions(+), 7 deletions(-) -- 2.39.5
