linux-stable.git/drivers/gpu/drm/amd/include, branch master

drm/amdgpu/gfx6: Add IP block soft reset implementation

2026-08-06T16:47:46+00:00

Update the register definition for GRBM_SOFT_RESET
to match what was in the old radeon driver and use
these bits in the soft reset implementation.

For the soft reset, use basically the same
implementation as GFX7-8, the main difference being
the GRBM_SOFT_RESET bit fields and the fact that
GFX6 doesn't have MQD/HQD. Reset every block using
the GRBM, then proceed to reset the GRBM and SEM blocks
using the SRBM.

The soft reset also calls the clock and powergating
functions of the IP block. This is necessary for
correct operation, otherwise the GPU might fall
off the PCIe bus.

Add a gfx_v6_0_late_init() function for consistency
with other GPU generations. This function will
later serve the same purpose as it does on GFX7+
when we get around to enable more IRQs on GFX6.

Signed-off-by: Timur Kristóf 
Signed-off-by: Alex Deucher

drm/amd: Add DCN6 register headers

2026-08-06T13:46:28+00:00

Add new headers for:
- dcn 6.0.0
- dpcs 6.0.0
- mmhub 5.0.1

Signed-off-by: Aurabindo Pillai 
Signed-off-by: Roman Li 
Reviewed-by: Ivan Lipski 
Tested-by: Dan Wheeler 
Signed-off-by: Alex Deucher

drm/amd/pm: use milliwatts for GPU power sensors

2026-07-28T23:17:33+00:00

GPU average and input power backends report a mix of whole watts,
milliwatts, Q24.8 watts and decimal-packed fractions. Q24.8 is inherited
from the legacy PowerPlay sensor format. Milliwatts are a more natural unit
for the hwmon and pm_info consumers in amdgpu_pm.c. A common decoder cannot
distinguish these formats, and converting native milliwatts through Q24.8
also loses precision.

Use milliwatts as the internal unit across all PPT and PowerPlay backends.
Decode Q24.8 only at the legacy smu7 input boundary and encode it only for
the raw amdgpu_sensors debugfs interface. This gives hwmon, pm_info and the
sensor ioctl one unambiguous unit while preserving the format used by UMR.

Fixes: 5b79d0482f3c ("drm/amd/pp: Remove struct pp_gpu_power")
Fixes: 01992b121fb6 ("drm/amd/pm: fix amdgpu_pm_info power display units")
Signed-off-by: Yang Wang 
Reviewed-by: Kenneth Feng 
Reported-by: Lars Nieradzik 
Signed-off-by: Alex Deucher

drm/amdgpu: convert ptl_hw_supported to enum

2026-07-28T22:52:30+00:00

Convert ptl_hw_supported to enum with three states:
- AMDGPU_PTL_HW_UNINIT: not yet initialized
- AMDGPU_PTL_HW_SUPPORTED: initialized and supported
- AMDGPU_PTL_HW_NOT_SUPPORTED: initialized and not supported

This allows skipping PTL initialization attempts when hardware is
known to not support it, avoiding repeated initialization failures
after GPU resets.

v2:move ptl_hw_supported_state to AMDGPU_PTL_HW_NOT_SUPPORTED regardless
of error code during first time initialization. Print init fail log when
error code is not EOPNOTSUPP.

Signed-off-by: Victor Zhao 
Reviewed-by: Lijo Lazar 
Signed-off-by: Alex Deucher

drm/amdgpu: add mes gang contex alloc/free helper

2026-07-15T13:15:43+00:00

Implement the MES gang contex alloc and free heplers.

Signed-off-by: Prike Liang 
Reviewed-by: Michael Chen 
Signed-off-by: Alex Deucher

drm/amdgpu: drop kernel-doc for deleted struct fields

2026-07-15T13:15:42+00:00

3 fields in struct amd_ip_funcs have been deleted, so also delete the
kernel-doc comments for them to avoid warnings:

WARNING: ../drivers/gpu/drm/amd/include/amd_shared.h:481 Excess struct member 'check_soft_reset' description in 'amd_ip_funcs'
WARNING: ../drivers/gpu/drm/amd/include/amd_shared.h:481 Excess struct member 'pre_soft_reset' description in 'amd_ip_funcs'
WARNING: ../drivers/gpu/drm/amd/include/amd_shared.h:481 Excess struct member 'post_soft_reset' description in 'amd_ip_funcs'

Fixes: 947e46eb2fb9 ("drm/amdgpu: Delete check_soft_reset() from amd_ip_funcs")
Fixes: b7500532e12b ("drm/amdgpu: Delete pre/post_soft_reset() from amd_ip_funcs")
Signed-off-by: Randy Dunlap 
Signed-off-by: Alex Deucher

drm/amdgpu/mes11: get MES process/gang contex size

2026-07-15T13:15:42+00:00

Setup the MES_API_QUERY_MES__GET_CTX_ARRAY_SIZE MES firmware
command request, and get the MES11 process/gang contex size.

Signed-off-by: Prike Liang 
Reviewed-by: Michael Chen 
Signed-off-by: Alex Deucher

drm/amdgpu/mes11: set doorbell offset for suspending userq

2026-07-01T15:54:18+00:00

Updating the union MESAPI__SUSPEND and union MESAPI__RESUME to
add the doorbell offset for suspending userq.

Signed-off-by: Prike Liang 
Acked-by: Christian König 
Signed-off-by: Alex Deucher

drm/amdgpu: Delete pre/post_soft_reset() from amd_ip_funcs

2026-07-01T15:14:03+00:00

These functions were largely redundant with the respective
suspend() and resume() functions, the main difference being
that they were less used and therefore less likely to be
tested and correct.

Move anything relevant from pre/post_soft_reset()
that is not already done by suspend()/resume()
into the soft_reset() functions.

Note that future uses of soft_reset() will need to call
the suspend() / resume() functions and the necessary clock
and power gating functions.

Reviewed-by: Alex Deucher 
Signed-off-by: Timur Kristóf 
Acked-by: Christian König 
Signed-off-by: Alex Deucher

drm/amdgpu: Delete check_soft_reset() from amd_ip_funcs

2026-07-01T15:11:52+00:00

This function is not called from anywhere anymore and
every implementation was bogus.

Some implementations checked busy flags of the IP blocks,
which are not really indicative of whether the block is
hung and needs to be reset. For example the blocks
could be busy just normally executing submissions,
and not need to be reset.

Other implementations checked IB tests, which is actually
more useful, but could still just indicate that an IP block
is executing submissions normally.

It is also unnecessary because the GPU recovery code path
already knows which ring is hung so we know exactly what
we need to reset.

Just delete check_soft_reset() entirely.

Reviewed-by: Alex Deucher 
Signed-off-by: Timur Kristóf 
Reviewed-by: Christian König 
Signed-off-by: Alex Deucher