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    Subject[PATCH 5.8 002/148] drm/panel-simple: Fix inverted V/H SYNC for Frida FRD350H54004 panel
    Date
    From: Paul Cercueil <paul@crapouillou.net>

    [ Upstream commit bad20a2dbfdfaf01560026909506b6ed69d65ba2 ]

    The FRD350H54004 panel was marked as having active-high VSYNC and HSYNC
    signals, which sorts-of worked, but resulted in the picture fading out
    under certain circumstances.

    Fix this issue by marking VSYNC and HSYNC signals active-low.

    v2: Rebase on drm-misc-next

    Fixes: 7b6bd8433609 ("drm/panel: simple: Add support for the Frida FRD350H54004 panel")
    Cc: stable@vger.kernel.org # v5.5
    Signed-off-by: Paul Cercueil <paul@crapouillou.net>
    Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
    Link: https://patchwork.freedesktop.org/patch/msgid/20200716125647.10964-1-paul@crapouillou.net
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/panel/panel-simple.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
    index 444b77490a42a..7debf2ca42522 100644
    --- a/drivers/gpu/drm/panel/panel-simple.c
    +++ b/drivers/gpu/drm/panel/panel-simple.c
    @@ -1717,7 +1717,7 @@ static const struct drm_display_mode frida_frd350h54004_mode = {
    .vsync_end = 240 + 2 + 6,
    .vtotal = 240 + 2 + 6 + 2,
    .vrefresh = 60,
    - .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
    + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
    };

    static const struct panel_desc frida_frd350h54004 = {
    --
    2.25.1


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