[PATCH v3 03/12] drm/rockchip: return a true clock rate to adjusted_mode

Chris Zhong
2015-11-19T03:37:19Z

Sometimes the clock driver can not set a accurate clock_rate for vop,
get the true rate of vop_dclk and set it back to adjusted_mode, since
the mipi dsi driver need to use the clock to make the calculation of
Blanking.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 5d8ae5e..9986b311ed 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1232,6 +1232,12 @@ static int vop_crtc_mode_set(struct drm_crtc *crtc,
reset_control_deassert(vop->dclk_rst);

clk_set_rate(vop->dclk, adjusted_mode->clock * 1000);
+
+ /*
+ * Sometimes the clock driver can not set a accurate clock_rate for vop,
+ * get the true rate of vop_dclk and set it back to adjusted_mode.
+ */
+ adjusted_mode->clock = clk_get_rate(vop->dclk) / 1000;
out:
ret_clk = clk_enable(vop->dclk);
if (ret_clk < 0) {
--
2.6.3