[PATCH] drm/komeda: Adds more check in mode_valid

[Lowry Li (Arm Technology China)]

This patch adds the checks for vrefresh, crtc_hdisplay and crtc_vdisplay.

Signed-off-by: Lowry Li (Arm Technology China) <lowry...@arm.com>
---
 drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 28 +++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c 
b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index 2fed1f6..017f6b6 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -403,11 +403,37 @@ unsigned long komeda_crtc_get_aclk(struct 
komeda_crtc_state *kcrtc_st)
        struct komeda_dev *mdev = crtc->dev->dev_private;
        struct komeda_crtc *kcrtc = to_kcrtc(crtc);
        struct komeda_pipeline *master = kcrtc->master;
-       unsigned long min_pxlclk, min_aclk;
+       struct komeda_compiz *compiz = master->compiz;
+       unsigned long min_pxlclk, min_aclk, delta, full_frame;
+       int hdisplay = m->hdisplay;
 
        if (m->flags & DRM_MODE_FLAG_INTERLACE)
                return MODE_NO_INTERLACE;
 
+       full_frame = m->htotal * m->vtotal;
+       delta = abs(m->clock * 1000 - m->vrefresh * full_frame);
+       if (m->vrefresh && (delta > full_frame)) {
+               DRM_DEBUG_ATOMIC("mode clock check error!\n");
+               return MODE_CLOCK_RANGE;
+       }
+
+       if (kcrtc->side_by_side)
+               hdisplay /= 2;
+
+       if (!in_range(&compiz->hsize, hdisplay)) {
+               DRM_DEBUG_ATOMIC("hdisplay[%u] is out of range[%u, %u]!\n",
+                                hdisplay, compiz->hsize.start,
+                                compiz->hsize.end);
+               return MODE_BAD_HVALUE;
+       }
+
+       if (!in_range(&compiz->vsize, m->vdisplay)) {
+               DRM_DEBUG_ATOMIC("vdisplay[%u] is out of range[%u, %u]!\n",
+                                m->vdisplay, compiz->vsize.start,
+                                compiz->vsize.end);
+               return MODE_BAD_VVALUE;
+       }
+
        min_pxlclk = m->clock * 1000;
        if (master->dual_link)
                min_pxlclk /= 2;
-- 
1.9.1