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| author | Mario Limonciello <mario.limonciello@amd.com> | 2022-02-01 19:26:33 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-02-24 00:31:06 +0300 |
| commit | 7294863a6f01248d72b61d38478978d638641bee (patch) | |
| tree | f58122b25f8a2bf67bcb5da3ca54af16e6e57ca8 /drivers/firmware | |
| parent | 4d22336f903930eb94588b939c310743a3640276 (diff) | |
| download | linux-7294863a6f01248d72b61d38478978d638641bee.tar.xz | |
drm/amd: Check if ASPM is enabled from PCIe subsystem
commit 0064b0ce85bb ("drm/amd/pm: enable ASPM by default") enabled ASPM
by default but a variety of hardware configurations it turns out that this
caused a regression.
* PPC64LE hardware does not support ASPM at a hardware level.
CONFIG_PCIEASPM is often disabled on these architectures.
* Some dGPUs on ALD platforms don't work with ASPM enabled and PCIe subsystem
disables it
Check with the PCIe subsystem to see that ASPM has been enabled
or not.
Fixes: 0064b0ce85bb ("drm/amd/pm: enable ASPM by default")
Link: https://wiki.raptorcs.com/w/images/a/ad/P9_PHB_version1.0_27July2018_pub.pdf
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1723
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1739
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1885
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1907
Tested-by: koba.ko@canonical.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/firmware')
0 files changed, 0 insertions, 0 deletions