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    Subject[PATCH 4.9 014/241] drm/sun4i: Set drm_crtc.port to the underlying TCONs output port node
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Chen-Yu Tsai <wens@csie.org>


    [ Upstream commit 7544860733d158e3edbf309f27e79e258c8f66bd ]

    The way drm_of_find_possible_crtcs works is it tries to match the
    remote-endpoint of the given node's various endpoints to all the
    crtc's .port field. Thus we need to set drm_crtc.port to the output
    port node of the underlying TCON.

    Signed-off-by: Chen-Yu Tsai <wens@csie.org>
    Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/gpu/drm/sun4i/sun4i_crtc.c | 5 +++++
    1 file changed, 5 insertions(+)

    --- a/drivers/gpu/drm/sun4i/sun4i_crtc.c
    +++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
    @@ -19,6 +19,7 @@
    #include <linux/clk-provider.h>
    #include <linux/ioport.h>
    #include <linux/of_address.h>
    +#include <linux/of_graph.h>
    #include <linux/of_irq.h>
    #include <linux/regmap.h>

    @@ -136,5 +137,9 @@ struct sun4i_crtc *sun4i_crtc_init(struc

    drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs);

    + /* Set crtc.port to output port node of the tcon */
    + scrtc->crtc.port = of_graph_get_port_by_id(drv->tcon->dev->of_node,
    + 1);
    +
    return scrtc;
    }

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