diff options
| -rw-r--r-- | drivers/gpu/drm/arc/arcpgu_crtc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/arc/arcpgu_crtc.c b/drivers/gpu/drm/arc/arcpgu_crtc.c index 1859dd3ad622..55c5d5bd74e1 100644 --- a/drivers/gpu/drm/arc/arcpgu_crtc.c +++ b/drivers/gpu/drm/arc/arcpgu_crtc.c @@ -69,12 +69,13 @@ static enum drm_mode_status arc_pgu_crtc_mode_valid(struct drm_crtc *crtc, { struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc); long rate, clk_rate = mode->clock * 1000; + long diff = clk_rate / 200; /* +-0.5% allowed by HDMI spec */ rate = clk_round_rate(arcpgu->clk, clk_rate); - if (rate != clk_rate) - return MODE_NOCLOCK; + if ((max(rate, clk_rate) - min(rate, clk_rate) < diff) && (rate > 0)) + return MODE_OK; - return MODE_OK; + return MODE_NOCLOCK; } static void arc_pgu_crtc_mode_set_nofb(struct drm_crtc *crtc) |