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    Subject[PATCH 5.10 064/141] drm/mediatek: dsi: Add atomic {destroy,duplicate}_state, reset callbacks
    Date
    From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

    [ Upstream commit eeda05b5e92f51d9a09646ecb493f0a1e872a6ef ]

    Add callbacks for atomic_destroy_state, atomic_duplicate_state and
    atomic_reset to restore functionality of the DSI driver: this solves
    vblank timeouts when another bridge is present in the chain.

    Tested bridge chain: DSI <=> ANX7625 => aux-bus panel

    Fixes: 7f6335c6a258 ("drm/mediatek: Modify dsi funcs to atomic operations")
    Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
    Tested-by: Chen-Yu Tsai <wenst@chromium.org>
    Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
    Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
    Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20220721172727.14624-1-angelogioacchino.delregno@collabora.com/
    Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/mediatek/mtk_dsi.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
    index 7d37d2a01e3c..b8c1a3c1c517 100644
    --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
    +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
    @@ -791,10 +791,13 @@ static void mtk_dsi_bridge_atomic_post_disable(struct drm_bridge *bridge,

    static const struct drm_bridge_funcs mtk_dsi_bridge_funcs = {
    .attach = mtk_dsi_bridge_attach,
    + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
    .atomic_disable = mtk_dsi_bridge_atomic_disable,
    + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
    .atomic_enable = mtk_dsi_bridge_atomic_enable,
    .atomic_pre_enable = mtk_dsi_bridge_atomic_pre_enable,
    .atomic_post_disable = mtk_dsi_bridge_atomic_post_disable,
    + .atomic_reset = drm_atomic_helper_bridge_reset,
    .mode_set = mtk_dsi_bridge_mode_set,
    };

    --
    2.35.1


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