[PATCH 14/28] drm/amd/display: Allow 0 dtbclk for DCN35 and above

[Ray Wu]

From: Leo Li <sunpeng.li at amd.com>

[Why & How]

0 dtbclk is supported by ASICs with DCN35 and above, so allow it during
driver init.

Reviewed-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
Signed-off-by: Leo Li <sunpeng.li at amd.com>
Signed-off-by: Ray Wu <ray.wu at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++++
 1 file changed, 4 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 bd71f911e279..cd6e7aa91040 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2106,6 +2106,10 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 
 	init_data.flags.disable_ips_in_vpb = 0;
 
+	/* DCN35 and above supports dtb clk disable */
+	if (amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(3, 5, 0))
+		init_data.flags.allow_0_dtb_clk = true;
+
 	/* Enable DWB for tested platforms only */
 	if (amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(3, 0, 0))
 		init_data.num_virtual_links = 1;
-- 
2.43.0