kernel/linux.git/drivers/gpu/drm/amd/pm, branch v7.2-rc1

drm/amd/pm: re-enable MC access after PrepareMp1ForUnload on SMU V15 APUs

2026-06-17T22:07:31+00:00

During smu_v15_0_0_system_features_control(), the driver sends a PrepareMp1ForUnload message to PMFW. PMFW then performs nBIF and SYSHUB function-level resets (FLR), disabling PCIe CFG space reset, which clears the framebuffer enable bit to zero and disables MC (memory controller) access from the host. Re-enable MC access via the nbio mc_access_enable callback right after PrepareMp1ForUnload completes in smu_v15_0_0_system_features_control(). Signed-off-by: Shubhankar Milind Sardeshpande Signed-off-by: Suresh Guttula Signed-off-by: Alex Deucher (cherry picked from commit 840a3c5aeae779a3bc75d7f747c3ed18b1af6507) Cc: stable@vger.kernel.org

drm/amd/pm: Use strscpy in profile mode parsing

2026-06-04T19:27:55+00:00

Use strscpy to copy the buffer which makes it explicit that a valid NULL terminated string gets copied. Also, make it explicit that the source buffer can be copied safely to the temporary buffer by checking against its size. Signed-off-by: Lijo Lazar Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amd/pm: bound OD parameter parsing to stack array size

2026-06-04T19:26:01+00:00

Reject inputs once parameter_size reaches the array limit, and pass ARRAY_SIZE(parameter) into parse_input_od_command_lines() for defense in depth. Signed-off-by: Candice Li Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amd/pm: Stop pp_od_clk_voltage emit at PAGE_SIZE

2026-06-04T19:25:58+00:00

Stop appending OD sections in amdgpu_get_pp_od_clk_voltage() once the sysfs page is full, instead of checking every sysfs_emit_at() in SMU helpers. This is purely defensive hardening. v2: Drop the prior series that checked sysfs_emit_at() return values in every SMU *_emit_clk_levels() helper and smu_cmn_print_*().(Kevin) v3: Update description, remove all clamping Signed-off-by: Asad Kamal Reviewed-by: Yang Wang Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amd/pm: smu_v14_0_0: use SoftMin for gfxclk in set_soft_freq_limited_range

2026-06-03T18:02:35+00:00

In smu_v14_0_0_set_soft_freq_limited_range(), the gfxclk floor is programmed via SetHardMinGfxClk together with SetSoftMaxGfxClk. Under power_dpm_force_performance_level=high this pins HardMin to peak gfxclk. In PMFW arbitration HardMin has higher priority than SoftMax, so the firmware thermal/PPT throttler cannot clamp gfxclk via SoftMax once HardMin is set to peak. Replace SetHardMinGfxClk with SetSoftMinGfxclk so the driver still requests peak performance but the firmware throttler retains the ability to clamp gfxclk under thermal/PPT pressure. SoftMax handling is unchanged and no other clock domains are affected. Signed-off-by: Priya Hosur Acked-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amd/pm: zero unused SMU argument registers

2026-06-03T17:53:42+00:00

SMU messages may use fewer arguments than the available argument registers, the previous code only wrote used registers and left the rest unchanged, so stale values from a prior message could persist. Write all argument registers for each message and zero the unused tail to keep command arguments deterministic and avoid unintended carry-over. Signed-off-by: Yang Wang Reviewed-by: Asad Kamal Signed-off-by: Alex Deucher

drm/amd/pm: mark metrics.energy_accumulator is invalid for smu 14.0.2

2026-06-03T17:53:34+00:00

EnergyAccumulator is unsupported on SMU 14.0.2, mark it invalid. Signed-off-by: Yang Wang Reviewed-by: Asad Kamal Signed-off-by: Alex Deucher

drm/amd/pm: fix smu13 power limit default/cap calculation

2026-06-03T17:53:25+00:00

smu_v13_0_0_get_power_limit() and smu_v13_0_7_get_power_limit() mix runtime power_limit with PP table limits when reporting default/min/max. When current power limit query succeeds, default_power_limit was set to the runtime value instead of the PP table default, and min/max could be derived from inconsistent bases (MsgLimits/runtime), leading to incorrect cap info. Use SocketPowerLimitAc/Dc as the PP default base (pp_limit), keep current_power_limit as runtime value, and derive min/max from pp_limit with OD percentages. Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5227 Signed-off-by: Yang Wang Reviewed-by: Kenneth Feng Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amd/pm: apply SMU 13.0.10 workaround during MP1 unload

2026-06-03T17:53:11+00:00

On SMU v13.0.10, sending PrepareMp1ForUnload with the default parameter may leave the device in an inaccessible state. This can affect runtime power management and partial PnP flows. e.g: kexec, driver unload, boco/d3cold. Pass the required workaround parameter 0x55, when preparing MP1 for unload on SMU v13.0.10, keep the existing behavior for other SMU versions. Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5133 Signed-off-by: Yang Wang Reviewed-by: Kenneth Feng Signed-off-by: Alex Deucher

drm/amd/pm: use kcalloc in phm table copy helpers

2026-06-03T17:53:03+00:00

Use kcalloc() so multiplication overflow is detected and allocation fails safely for phm table copy helpers. Signed-off-by: Candice Li Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher