drm/exynos/hdmi: expose HDMI-PHY clock as pipeline clock

HDMI-PHY clock should be accessible from other components in the pipeline.

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 0f87acb4cf21020be72cd9e3366e3b7cdc3299ef..7de4dd5ab6e5e9859f41aab96cd3e77a8c0a1c5e 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -146,6 +146,7 @@ struct hdmi_context {
        struct clk                      **clk_muxes;
        struct regulator_bulk_data      regul_bulk[ARRAY_SIZE(supply)];
        struct regulator                *reg_hdmi_en;
+       struct exynos_drm_clk           phy_clk;
 };
 
 static inline struct hdmi_context *encoder_to_hdmi(struct drm_encoder *e)
@@ -1445,7 +1446,6 @@ static void hdmiphy_conf_apply(struct hdmi_context *hdata)
 
 static void hdmi_conf_apply(struct hdmi_context *hdata)
 {
-       hdmiphy_conf_apply(hdata);
        hdmi_start(hdata, false);
        hdmi_conf_init(hdata);
        hdmi_audio_init(hdata);
@@ -1478,10 +1478,8 @@ static void hdmi_set_refclk(struct hdmi_context *hdata, bool on)
                           SYSREG_HDMI_REFCLK_INT_CLK, on ? ~0 : 0);
 }
 
-static void hdmi_enable(struct drm_encoder *encoder)
+static void hdmiphy_enable(struct hdmi_context *hdata)
 {
-       struct hdmi_context *hdata = encoder_to_hdmi(encoder);
-
        if (hdata->powered)
                return;
 
@@ -1497,11 +1495,40 @@ static void hdmi_enable(struct drm_encoder *encoder)
 
        hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, 0, HDMI_PHY_POWER_OFF_EN);
 
-       hdmi_conf_apply(hdata);
+       hdmiphy_conf_apply(hdata);
 
        hdata->powered = true;
 }
 
+static void hdmiphy_disable(struct hdmi_context *hdata)
+{
+       if (!hdata->powered)
+               return;
+
+       hdmi_reg_writemask(hdata, HDMI_CON_0, 0, HDMI_EN);
+
+       hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, ~0, HDMI_PHY_POWER_OFF_EN);
+
+       hdmi_set_refclk(hdata, false);
+
+       regmap_update_bits(hdata->pmureg, PMU_HDMI_PHY_CONTROL,
+                       PMU_HDMI_PHY_ENABLE_BIT, 0);
+
+       regulator_bulk_disable(ARRAY_SIZE(supply), hdata->regul_bulk);
+
+       pm_runtime_put_sync(hdata->dev);
+
+       hdata->powered = false;
+}
+
+static void hdmi_enable(struct drm_encoder *encoder)
+{
+       struct hdmi_context *hdata = encoder_to_hdmi(encoder);
+
+       hdmiphy_enable(hdata);
+       hdmi_conf_apply(hdata);
+}
+
 static void hdmi_disable(struct drm_encoder *encoder)
 {
        struct hdmi_context *hdata = encoder_to_hdmi(encoder);
@@ -1525,22 +1552,9 @@ static void hdmi_disable(struct drm_encoder *encoder)
        if (funcs && funcs->disable)
                (*funcs->disable)(crtc);
 
-       hdmi_reg_writemask(hdata, HDMI_CON_0, 0, HDMI_EN);
-
        cancel_delayed_work(&hdata->hotplug_work);
 
-       hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, ~0, HDMI_PHY_POWER_OFF_EN);
-
-       hdmi_set_refclk(hdata, false);
-
-       regmap_update_bits(hdata->pmureg, PMU_HDMI_PHY_CONTROL,
-                       PMU_HDMI_PHY_ENABLE_BIT, 0);
-
-       regulator_bulk_disable(ARRAY_SIZE(supply), hdata->regul_bulk);
-
-       pm_runtime_put_sync(hdata->dev);
-
-       hdata->powered = false;
+       hdmiphy_disable(hdata);
 }
 
 static const struct drm_encoder_helper_funcs exynos_hdmi_encoder_helper_funcs = {
@@ -1625,6 +1639,17 @@ static int hdmi_clk_init(struct hdmi_context *hdata)
 }
 
 
+static void hdmiphy_clk_enable(struct exynos_drm_clk *clk, bool enable)
+{
+       struct hdmi_context *hdata = container_of(clk, struct hdmi_context,
+                                                 phy_clk);
+
+       if (enable)
+               hdmiphy_enable(hdata);
+       else
+               hdmiphy_disable(hdata);
+}
+
 static int hdmi_resources_init(struct hdmi_context *hdata)
 {
        struct device *dev = hdata->dev;
@@ -1710,6 +1735,10 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
        if (pipe < 0)
                return pipe;
 
+       hdata->phy_clk.enable = hdmiphy_clk_enable;
+
+       exynos_drm_crtc_from_pipe(drm_dev, pipe)->pipe_clk = &hdata->phy_clk;
+
        encoder->possible_crtcs = 1 << pipe;
 
        DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);