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0288a345f1
ISP mfd child devices are using genpd and the system suspend-resume operations between genpd and amdgpu parent device which uses only runtime suspend-resume are not in sync. Linux power manager during suspend-resume resuming the genpd devices earlier than the amdgpu parent device. This is resulting in the below warning as SMU is in suspended state when genpd attempts to resume ISP. WARNING: CPU: 13 PID: 5435 at drivers/gpu/drm/amd/amdgpu/../pm/swsmu/amdgpu_smu.c:398 smu_dpm_set_power_gate+0x36f/0x380 [amdgpu] To fix this warning isp suspend-resume is handled as part of amdgpu parent device suspend-resume instead of genpd sequence. Each ISP MFD child device is marked as dev_pm_syscore_device to skip genpd suspend-resume and use pm_runtime_force api's to suspend-resume the devices when callbacks from amdgpu are received. Co-developed-by: Gjorgji Rosikopulos <grosikop@amd.com> Signed-off-by: Gjorgji Rosikopulos <grosikop@amd.com> Signed-off-by: Bin Du <bin.du@amd.com> Signed-off-by: Pratap Nirujogi <pratap.nirujogi@amd.com> Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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.