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drm/amd/display: Enable Dynamic DTBCLK Switch

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[WHAT]
Since dcn35, DTBCLK can be disabled when no DP2 sink connected for
power saving purpose.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Fangzhi Zuo
2025-09-24 14:37:01 -04:00
committed by Alex Deucher
parent 2e97663760
commit 5949e7c489
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -2000,6 +2000,10 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
init_data.flags.disable_ips_in_vpb = 0;
/* DCN35 and above supports dynamic DTBCLK switch */
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;