== Description ==
Scnprintf use within the kernel is not recommended, but simple sysfs_emit
replacement has
not been successful due to the page alignment requirement of the function. This
patch
set implements a new api "emit_clock_levels" to facilitate passing both the
base and
offset to the device rather than just the write pointer.
This patch is only implemented for navi10 for some clocks to seek comment on the
implementation before extending the implementation to other clock values and
devices.
Needs to be verified on a platform that supports the overclocking
== Patch Summary ==
linux: (g...@gitlab.freedesktop.org:agd5f) origin/amd-staging-drm-next @
be0118f90e18
+ 351ae7734898 amdgpu/pm: Implement new API function "emit" that accepts
buffer base and write offset
+ 76c13c49fc6b amdgpu/pm: insert attempt to call emit_clock_levels into
amdgpu_get_pp_od_clk_voltage
+ 28c533371023 amdgpu/pm: Add Error Handling to emit_clocks stack
== System Summary ==
* DESKTOP(AMD FX-8350 + NAVI10(731F/ca), BIOS: F2)
+ ISO(Ubuntu 20.04.3 LTS)
+ Kernel(5.13.0-20211128-be0118f90e18-fdoagd5f)
== Test ==
LOGFILE=pp_clk.test.log
AMDGPU_PCI_ADDR=`lspci -nn | grep "VGA\|Display" | cut -d " " -f 1`
AMDGPU_HWMON=`ls -la /sys/class/hwmon | grep $AMDGPU_PCI_ADDR | awk '{print
$9}'`
HWMON_DIR=/sys/class/hwmon/${AMDGPU_HWMON}
lspci -nn | grep "VGA\|Display" > $LOGFILE
FILES="pp_od_clk_voltage
pp_dpm_sclk
pp_dpm_mclk
pp_dpm_pcie
pp_dpm_socclk
pp_dpm_fclk
pp_dpm_dcefclk
pp_dpm_vclk
pp_dpm_dclk "
for f in $FILES
do
echo === $f === >> $LOGFILE
cat $HWMON_DIR/device/$f >> $LOGFILE
done
cat $LOGFILE
Darren Powell (3):
amdgpu/pm: Implement new API function "emit" that accepts buffer base
and write offset
amdgpu/pm: insert attempt to call emit_clock_levels into
amdgpu_get_pp_od_clk_voltage
amdgpu/pm: Add Error Handling to emit_clocks stack
.../gpu/drm/amd/include/kgd_pp_interface.h | 1 +
drivers/gpu/drm/amd/pm/amdgpu_pm.c | 65 ++++--
drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h | 3 +
drivers/gpu/drm/amd/pm/inc/amdgpu_smu.h | 18 ++
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 49 ++++-
.../gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 188 ++++++++++++++++++
6 files changed, 301 insertions(+), 23 deletions(-)
base-commit: be0118f90e18e3fb8191f17f51a9addc93d0f185
--
2.34.1
