Hdmi or DisplayPort request a accurate clock,
reject the display mode if clock is not good.
Signed-off-by: Mark Yao <mark....@rock-chips.com>
---
drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 7ec5d7f..a7c118e 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -868,14 +868,24 @@ static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
{
struct vop *vop = to_vop(crtc);
const struct vop_data *vop_data = vop->data;
+ struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc->state);
+ int clock;
if (mode->hdisplay > vop_data->max_output.width)
return false;
if (mode->vdisplay > vop_data->max_output.height)
return false;
- adjusted_mode->clock =
- clk_round_rate(vop->dclk, mode->clock * 1000) / 1000;
+ clock = clk_round_rate(vop->dclk, mode->clock * 1000) / 1000;
+ /*
+ * Hdmi or DisplayPort request a Accurate clock.
+ */
+ if (s->output_type == DRM_MODE_CONNECTOR_HDMIA ||
+ s->output_type == DRM_MODE_CONNECTOR_DisplayPort)
+ if (clock != mode->clock)
+ return false;
+
+ adjusted_mode->clock = clock;
return true;
}
--
1.9.1
