From: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Some monitors flicker when subvp is enabled which maybe related to
an uncommon timing they use. To isolate such issues, add a debug
option to help isolate this the issue for debugging.
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
drivers/gpu/drm/amd/include/amd_shared.h | 5 +++++
2 files changed, 8 insertions(+)
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 e0c977e28626..fe75fbced027 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2033,6 +2033,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
if (amdgpu_dc_debug_mask & DC_FORCE_SUBVP_MCLK_SWITCH)
adev->dm.dc->debug.force_subvp_mclk_switch = true;
+ if (amdgpu_dc_debug_mask & DC_DISABLE_SUBVP)
+ adev->dm.dc->debug.force_disable_subvp = true;
+
if (amdgpu_dc_debug_mask & DC_ENABLE_DML2) {
adev->dm.dc->debug.using_dml2 = true;
adev->dm.dc->debug.using_dml21 = true;
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 05bdb4e020ae..c3e6dd4f4e00 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -349,6 +349,11 @@ enum DC_DEBUG_MASK {
* @DC_DISABLE_HDMI_CEC: If set, disable HDMI-CEC feature in amdgpu driver.
*/
DC_DISABLE_HDMI_CEC = 0x10000,
+
+ /*
+ * @DC_DISABLE_SUBVP: If set, disable DCN Sub-Viewport feature in amdgpu driver.
+ */
+ DC_DISABLE_SUBVP = 0x20000,
};
enum amd_dpm_forced_level;
--
2.48.0
