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drm/amdgpu/display: add quirk handling for stutter mode

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[ Upstream commit 3ce51649cdf23ab463494df2bd6d1e9529ebdc6a ]

Stutter mode is a power saving feature on GPUs, however at
least one early raven system exhibits stability issues with
it.  Add a quirk to disable it for that system.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214417
Fixes: 005440066f ("drm/amdgpu: enable gfxoff again on raven series (v2)")
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Deucher
2021-10-20 16:45:00 -04:00
committed by Greg Kroah-Hartman
parent 43128b3eee
commit fb6031203e
1 changed files with 33 additions and 0 deletions
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33
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -922,6 +922,37 @@ static void amdgpu_check_debugfs_connector_property_change(struct amdgpu_device
}
}
struct amdgpu_stutter_quirk {
u16 chip_vendor;
u16 chip_device;
u16 subsys_vendor;
u16 subsys_device;
u8 revision;
};
static const struct amdgpu_stutter_quirk amdgpu_stutter_quirk_list[] = {
/* https://bugzilla.kernel.org/show_bug.cgi?id=214417 */
{ 0x1002, 0x15dd, 0x1002, 0x15dd, 0xc8 },
{ 0, 0, 0, 0, 0 },
};
static bool dm_should_disable_stutter(struct pci_dev *pdev)
{
const struct amdgpu_stutter_quirk *p = amdgpu_stutter_quirk_list;
while (p && p->chip_device != 0) {
if (pdev->vendor == p->chip_vendor &&
pdev->device == p->chip_device &&
pdev->subsystem_vendor == p->subsys_vendor &&
pdev->subsystem_device == p->subsys_device &&
pdev->revision == p->revision) {
return true;
}
++p;
}
return false;
}
static int amdgpu_dm_init(struct amdgpu_device *adev)
{
struct dc_init_data init_data;
@@ -1014,6 +1045,8 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
if (adev->asic_type != CHIP_CARRIZO && adev->asic_type != CHIP_STONEY)
adev->dm.dc->debug.disable_stutter = amdgpu_pp_feature_mask & PP_STUTTER_MODE ? false : true;
if (dm_should_disable_stutter(adev->pdev))
adev->dm.dc->debug.disable_stutter = true;
if (amdgpu_dc_debug_mask & DC_DISABLE_STUTTER)
adev->dm.dc->debug.disable_stutter = true;