[PATCH 0/4] Add ISP Generic PM Domain (genpd) support

[Mario Limonciello]

On 6/18/2025 5:17 PM, Pratap Nirujogi wrote:
> This patch series adds support to control ISP power and clocks using the
> Generic PM Domain (genpd). Its required to control the ISP HW power from
> external I2C driver to successfully probe the sensor device. Instead of
> using an exported symbols from ISP driver, enabling Generic PM Domain (genpd)
> support in amdgpu_isp device allows its child devices (amd_isp_capture,
> amd_isp_i2c_designware) to set power and clocks directly using PM method.
> 
> We need to add support in amdgpu_smu as well for amdgpu_isp device to set
> power / clocks when invoked from genpd. Though the below SMU messages are
> defined, the actual support to configure ISP is missing in SMU interface.
> 
> PPSMC_MSG_PowerDownIspByTile
> PPSMC_MSG_PowerUpIspByTile
> PPSMC_MSG_SetHardMinIspiclkByFreq
> PPSMC_MSG_SetHardMinIspxclkByFreq
> 
> Added support in SMU to control ISP power / clocks by updating the existing
> amdgpu_dpm_set_powergating_by_smu() and amdgpu_dpm_set_soft_freq_range(); and
> the underlying SOC specific SMU implementation for isp v4.1.
> 
> Pratap Nirujogi (4):
>    drm/amd/pm: Add support to set ISP Power
>    drm/amd/pm: Add support to set min ISP clocks
>    drm/amd/amdgpu: Add ISP Generic PM Domain (genpd) support
>    drm/amd/amdgpu: Refine isp_v4_1_1 logging
> 
>   drivers/gpu/drm/amd/amdgpu/amdgpu_isp.h       |   3 +
>   drivers/gpu/drm/amd/amdgpu/isp_v4_1_1.c       | 173 ++++++++++++++++--
>   .../gpu/drm/amd/include/kgd_pp_interface.h    |   2 +
>   drivers/gpu/drm/amd/pm/amdgpu_dpm.c           |  15 +-
>   drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c     |  41 ++++-
>   drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h |   9 +-
>   .../inc/pmfw_if/smu14_driver_if_v14_0_0.h     |   1 +
>   drivers/gpu/drm/amd/pm/swsmu/inc/smu_types.h  |   2 +
>   .../drm/amd/pm/swsmu/smu14/smu_v14_0_0_ppt.c  |  60 ++++--
>   9 files changed, 264 insertions(+), 42 deletions(-)
> 

Reviewed-by: Mario Limonciello <mario.limonciello at amd.com>