linux/drivers/gpu/drm/amd/pm, branch master

drm/amd/pm/smu7: Add SCLK cap for quirky Hawaii board

2026-03-30T20:49:01Z

On a specific Radeon R9 390X board, the GPU can "randomly" hang while gaming. Initially I thought this was a RADV bug and tried to work around this in Mesa: commit 8ea08747b86b ("radv: Mitigate GPU hang on Hawaii in Dota 2 and RotTR") However, I got some feedback from other users who are reporting that the above mitigation causes a significant performance regression for them, and they didn't experience the hang on their GPU in the first place. After some further investigation, it turns out that the problem is that the highest SCLK DPM level on this board isn't stable. Lowering SCLK to 1040 MHz (from 1070 MHz) works around the issue, and has a negligible impact on performance compared to the Mesa patch. (Note that increasing the voltage can also work around it, but we felt that lowering the SCLK is the safer option.) To solve the above issue, add an "sclk_cap" field to smu7_hwmgr and set this field for the affected board. The capped SCLK value correctly appears on the sysfs interface and shows up in GUI tools such as LACT. Fixes: 9f4b35411cfe ("drm/amd/powerplay: add CI asics support to smumgr (v3)") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm/ci: Fill DW8 fields from SMC

2026-03-30T20:48:50Z

In ci_populate_dw8() we currently just read a value from the SMU and then throw it away. Instead of throwing away the value, we should use it to fill other fields in DW8 (like radeon). Otherwise the value of the other fiels is just cleared when we copy this data to the SMU later. Fixes: 9f4b35411cfe ("drm/amd/powerplay: add CI asics support to smumgr (v3)") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm/ci: Clear EnabledForActivity field for memory levels

2026-03-30T20:48:41Z

Follow what radeon did and what amdgpu does for other GPUs with SMU7. Fixes: 9f4b35411cfe ("drm/amd/powerplay: add CI asics support to smumgr (v3)") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm/ci: Fix powertune defaults for Hawaii 0x67B0

2026-03-30T20:48:18Z

There is no AMD GPU with the ID 0x66B0, this looks like a typo. It should be 0x67B0 which is actually part of the PCI ID list, and should use the Hawaii XT powertune defaults according to the old radeon driver. Fixes: 9f4b35411cfe ("drm/amd/powerplay: add CI asics support to smumgr (v3)") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm/smu7: Remove non-functional SMU7 voltage dependency on DAL

2026-03-30T20:48:11Z

It looks like this was written for an old version of DC (DAL) and was never adapted afterwards. This was non-functional because it relied on the "dal_power_level" field which was never assigned anywhere in the code base. Also, it was not implemented for CI ASICs. Now superseded by the newer voltage dependency on display clock table added by the previous commit, let's remove. Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm/smu7: Fix SMU7 voltage dependency on display clock

2026-03-30T20:45:22Z

The DCE (display controller engine) requires a minimum voltage in order to function correctly, depending on which clock level it currently uses. Add a new table that contains display clock frequency levels and the corresponding required voltages. The clock frequency levels are taken from DC (and the old radeon driver's voltage dependency table for CI in cases where its values were lower). The voltage levels are taken from the following function: phm_initializa_dynamic_state_adjustment_rule_settings(). Furthermore, in case of CI, call smu7_patch_vddc() on the new table to account for leakage voltage (like in radeon). Use the display clock value from amd_pp_display_configuration to look up the voltage level needed by the DCE. Send the voltage to the SMU via the PPSMC_MSG_VddC_Request command. The previous implementation of this feature was non-functional because it relied on a "dal_power_level" field which was never assigned; and it was not at all implemented for CI ASICs. I verified this on a Radeon R9 M380 which previously booted to a black screen with DC enabled (default since Linux 6.19), but now works correctly. Fixes: 599a7e9fe1b6 ("drm/amd/powerplay: implement smu7 hwmgr to manager asics with smu ip version 7.") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm/ci: Disable MCLK DPM on problematic CI ASICs

2026-03-30T20:44:54Z

There are two known cases where MCLK DPM can causes issues: Radeon R9 M380 found in iMac computers from 2015. The SMU in this GPU just hangs as soon as we send it the PPSMC_MSG_MCLKDPM_Enable command, even when MCLK switching is disabled, and even when we only populate one MCLK DPM level. Apply workaround to all devices with the same subsystem ID. Radeon R7 260X due to old memory controller microcode. We only flash the MC ucode when it isn't set up by the VBIOS, therefore there is no way to make sure that it has the correct ucode version. I verified that this patch fixes the SMU hang on the R9 M380 which would previously fail to boot. This also fixes the UVD initialization error on that GPU which happened because the SMU couldn't ungate the UVD after it hung. Fixes: 86457c3b21cb ("drm/amd/powerplay: Add support for CI asics to hwmgr") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm/ci: Use highest MCLK on CI when MCLK DPM is disabled

2026-03-30T20:44:16Z

When MCLK DPM is disabled for any reason, populate the MCLK table with the highest MCLK DPM level, so that the ASIC can use the highest possible memory clock to get good performance even when MCLK DPM is disabled. Fixes: 9f4b35411cfe ("drm/amd/powerplay: add CI asics support to smumgr (v3)") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/pm: Unify version check in SMUv14

2026-03-30T19:14:38Z

Use common helper function for firmware version check and logging in SMUv14 Signed-off-by: Lijo Lazar Reviewed-by: Asad Kamal Signed-off-by: Alex Deucher

drm/amd/pm: Unify version check in SMUv12

2026-03-30T19:13:06Z

Use common helper function for firmware version check and logging in SMUv12. Signed-off-by: Lijo Lazar Reviewed-by: Asad Kamal Signed-off-by: Alex Deucher