drm/exynos/hdmi: simplify clock re-parenting

Driver tries to disable sclk_hdmi during re-parenting, to avoid possible
glitches. It is ineffective as the clock is used also by other devices (mixer).
Anyway driver works without disabling sclk_hdmi.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 583dd5e..475341f 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1569,9 +1569,7 @@ static void hdmi_mode_apply(struct hdmi_context *hdata)
 
        hdmiphy_wait_for_pll(hdata);
 
-       clk_disable_unprepare(hdata->res.sclk_hdmi);
        clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_hdmiphy);
-       clk_prepare_enable(hdata->res.sclk_hdmi);
 
        /* enable HDMI and timing generator */
        hdmi_start(hdata, true);
@@ -1579,9 +1577,7 @@ static void hdmi_mode_apply(struct hdmi_context *hdata)
 
 static void hdmiphy_conf_reset(struct hdmi_context *hdata)
 {
-       clk_disable_unprepare(hdata->res.sclk_hdmi);
        clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_pixel);
-       clk_prepare_enable(hdata->res.sclk_hdmi);
 
        /* reset hdmiphy */
        hdmi_reg_writemask(hdata, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);