[PATCH v5 03/11] drm/rockchip: return a true clock rate to adjusted_mode

Chris Zhong
2015-11-26T07:50:17Z

Since the mipi dsi driver need to use the clock of vop to make the
calculation of Blanking. But sometimes the clock driver can not set a
accurate clock_rate for vop, get it by clk_round_rate before mode_set,
so we can get the true value.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Acked-by: Mark Yao <mark.yao@rock-chips.com>

---

Changes in v5: None
Changes in v4:
- use clk_round_rate to check the clock rate in vop_crtc_mode_fixup

Changes in v3: None
Changes in v2: None

drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 5d8ae5e..eff545b 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1136,9 +1136,14 @@ static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
+ struct vop *vop = to_vop(crtc);
+
if (adjusted_mode->htotal == 0 || adjusted_mode->vtotal == 0)
return false;

+ adjusted_mode->clock =
+ clk_round_rate(vop->dclk, mode->clock * 1000) / 1000;
+
return true;
}

--
2.6.3