Using a destination width that is more then 3840 pixels
is not supported in scl_vop_cal_scl_fac().

Work around this limitation by filtering all modes with
a width above 3840 pixels.

Signed-off-by: Jonas Karlman <[email protected]>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c 
b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index d04b3492bdac..f181897cbfad 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1036,6 +1036,15 @@ static void vop_crtc_disable_vblank(struct drm_crtc 
*crtc)
        spin_unlock_irqrestore(&vop->irq_lock, flags);
 }
 
+enum drm_mode_status vop_crtc_mode_valid(struct drm_crtc *crtc,
+                                        const struct drm_display_mode *mode)
+{
+       if (mode->hdisplay > 3840)
+               return MODE_BAD_HVALUE;
+
+       return MODE_OK;
+}
+
 static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
                                const struct drm_display_mode *mode,
                                struct drm_display_mode *adjusted_mode)
@@ -1377,6 +1386,7 @@ static void vop_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs vop_crtc_helper_funcs = {
+       .mode_valid = vop_crtc_mode_valid,
        .mode_fixup = vop_crtc_mode_fixup,
        .atomic_check = vop_crtc_atomic_check,
        .atomic_begin = vop_crtc_atomic_begin,
-- 
2.17.1

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