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    Subject[PATCH AUTOSEL 5.19 060/105] drm/amd/display: disable otg toggle w/a on boot
    Date
    From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>

    [ Upstream commit 8a077d9caa3a274de36ee2fe7b608041f5690343 ]

    This w/a has a bad interaction with seamless boot toggling an
    active stream. Most panels recover, however some fail leading
    to display corruption.

    Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
    Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
    Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
    Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    .../gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c | 7 +++++--
    1 file changed, 5 insertions(+), 2 deletions(-)

    diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c
    index f4381725b210..36b0cd47c1c7 100644
    --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c
    +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c
    @@ -173,11 +173,14 @@ static void dcn315_update_clocks(struct clk_mgr *clk_mgr_base,
    }

    if (should_set_clock(safe_to_lower, new_clocks->dispclk_khz, clk_mgr_base->clks.dispclk_khz)) {
    - dcn315_disable_otg_wa(clk_mgr_base, true);
    + /* No need to apply the w/a if we haven't taken over from bios yet */
    + if (clk_mgr_base->clks.dispclk_khz)
    + dcn315_disable_otg_wa(clk_mgr_base, true);

    clk_mgr_base->clks.dispclk_khz = new_clocks->dispclk_khz;
    dcn315_smu_set_dispclk(clk_mgr, clk_mgr_base->clks.dispclk_khz);
    - dcn315_disable_otg_wa(clk_mgr_base, false);
    + if (clk_mgr_base->clks.dispclk_khz)
    + dcn315_disable_otg_wa(clk_mgr_base, false);

    update_dispclk = true;
    }
    --
    2.35.1
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