lkml.org 
[lkml]   [2022]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 6.0 742/862] drm/admgpu: Skip CG/PG on SOC21 under SRIOV VF
    Date
    From: Yifan Zha <Yifan.Zha@amd.com>

    [ Upstream commit 828418259254863e0af5805bd712284e2bd88e3b ]

    [Why]
    There is no CG(Clock Gating)/PG(Power Gating) requirement on SRIOV VF.
    For multi VF, VF should not enable any CG/PG features.
    For one VF, PF will program CG/PG related registers.

    [How]
    Do not set any cg/pg flag bit at early init under sriov.

    Acked-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
    Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/amdgpu/soc21.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c b/drivers/gpu/drm/amd/amdgpu/soc21.c
    index 276ff6709881..9c3463b48139 100644
    --- a/drivers/gpu/drm/amd/amdgpu/soc21.c
    +++ b/drivers/gpu/drm/amd/amdgpu/soc21.c
    @@ -583,6 +583,10 @@ static int soc21_common_early_init(void *handle)
    AMD_PG_SUPPORT_JPEG |
    AMD_PG_SUPPORT_ATHUB |
    AMD_PG_SUPPORT_MMHUB;
    + if (amdgpu_sriov_vf(adev)) {
    + adev->cg_flags = 0;
    + adev->pg_flags = 0;
    + }
    adev->external_rev_id = adev->rev_id + 0x1; // TODO: need update
    break;
    case IP_VERSION(11, 0, 2):
    --
    2.35.1


    \
     
     \ /
      Last update: 2022-10-19 11:33    [W:4.052 / U:0.148 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site