From: Roman Li <roman...@amd.com>
[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...@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++-
drivers/gpu/drm/amd/include/amd_shared.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 1cf4beb..0f08879 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -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);
}
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h
b/drivers/gpu/drm/amd/include/amd_shared.h
index 8889aac..1daa221 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -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;
--
2.7.4
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