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    Subject[PATCH 5.7 108/376] drm/amd/display: Correct updating logic of dcn21s pipe VM flags
    Date
    From: Dale Zhao <dale.zhao@amd.com>

    [ Upstream commit 2a28fe92220a116735ef45939b7edcfee83cc6b0 ]

    [Why]:
    Renoir's pipe VM flags are not correctly updated if pipe strategy has
    changed during some scenarios. It will result in watermarks mistakenly
    calculation, thus underflow and garbage appear.

    [How]:
    Correctly update pipe VM flags to pipes which have been populated.

    Signed-off-by: Dale Zhao <dale.zhao@amd.com>
    Signed-off-by: Sung Lee <sung.lee@amd.com>
    Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
    Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 6 +-----
    1 file changed, 1 insertion(+), 5 deletions(-)

    diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
    index a721bb401ef0..6d1736cf5c12 100644
    --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
    +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
    @@ -1694,12 +1694,8 @@ static int dcn21_populate_dml_pipes_from_context(
    {
    uint32_t pipe_cnt = dcn20_populate_dml_pipes_from_context(dc, context, pipes);
    int i;
    - struct resource_context *res_ctx = &context->res_ctx;

    - for (i = 0; i < dc->res_pool->pipe_count; i++) {
    -
    - if (!res_ctx->pipe_ctx[i].stream)
    - continue;
    + for (i = 0; i < pipe_cnt; i++) {

    pipes[i].pipe.src.hostvm = 1;
    pipes[i].pipe.src.gpuvm = 1;
    --
    2.25.1


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