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drm/amdgpu/display: add dc feature mask for psr enablement

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[Why]
Adding psr mask to dc features allows selectively disable/enable psr.
Current psr implementation may not work with non-pageflipping application.
Until resolved it should be disabled by default.

[How]
Add dcfeaturemask for psr enablement. Disable by default.
To enable set amdgpu.dcfeaturemask=0x8 in grub kernel command line.

Signed-off-by: Roman Li <Roman.Li@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roman Li 2019-10-01 09:45:38 -04:00 committed by Alex Deucher
parent 6c45e480fe
commit 397a9bc588
2 changed files with 3 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -2424,7 +2424,8 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
} else if (dc_link_detect(link, DETECT_REASON_BOOT)) {
amdgpu_dm_update_connector_after_detect(aconnector);
register_backlight_device(dm, link);
amdgpu_dm_set_psr_caps(link);
if (amdgpu_dc_feature_mask & DC_PSR_MASK)
amdgpu_dm_set_psr_caps(link);
}

1
drivers/gpu/drm/amd/include/amd_shared.h
View File

@ -143,6 +143,7 @@ enum PP_FEATURE_MASK {
enum DC_FEATURE_MASK {
DC_FBC_MASK = 0x1,
DC_MULTI_MON_PP_MCLK_SWITCH_MASK = 0x2,
DC_PSR_MASK = 0x8,
};
enum amd_dpm_forced_level;