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    Subject[PATCH 3.16 070/114] drm/radeon: make sure vertical front porch is at least 1
    3.16.36-rc1 review patch.  If anyone has any objections, please let me know.

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

    From: Alex Deucher <alexander.deucher@amd.com>

    commit 3104b8128d4d646a574ed9d5b17c7d10752cd70b upstream.

    hw doesn't like a 0 value.

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    [bwh: Backported to 3.16: adjust context]
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    drivers/gpu/drm/radeon/atombios_encoders.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/drivers/gpu/drm/radeon/atombios_encoders.c
    +++ b/drivers/gpu/drm/radeon/atombios_encoders.c
    @@ -332,6 +332,10 @@ static bool radeon_atom_mode_fixup(struc
    && (mode->crtc_vsync_start < (mode->crtc_vdisplay + 2)))
    adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vdisplay + 2;

    + /* vertical FP must be at least 1 */
    + if (mode->crtc_vsync_start == mode->crtc_vdisplay)
    + adjusted_mode->crtc_vsync_start++;
    +
    /* get the native mode for LVDS */
    if (radeon_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT))
    radeon_panel_mode_fixup(encoder, adjusted_mode);
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