drm/exynos: Prepare/Unprepare HDMI subsystem clocks

Change the clk_enable/clk_disable calls in mixer and hdmi drivers into
clk_prepare_enable/clk_disable_unprepare, respectively.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_hdmi.c

@@ -1111,9 +1111,9 @@ static void hdmi_v13_mode_apply(struct hdmi_context *hdata)
 		hdmi_regs_dump(hdata, "timing apply");
 	}
 
-	clk_disable(hdata->res.sclk_hdmi);
+	clk_disable_unprepare(hdata->res.sclk_hdmi);
 	clk_set_parent(hdata->res.sclk_hdmi, hdata->res.sclk_hdmiphy);
-	clk_enable(hdata->res.sclk_hdmi);
+	clk_prepare_enable(hdata->res.sclk_hdmi);
 
 	/* enable HDMI and timing generator */
 	hdmi_reg_writemask(hdata, HDMI_CON_0, ~0, HDMI_EN);
@@ -1278,9 +1278,9 @@ static void hdmi_v14_mode_apply(struct hdmi_context *hdata)
 		hdmi_regs_dump(hdata, "timing apply");
 	}
 
-	clk_disable(hdata->res.sclk_hdmi);
+	clk_disable_unprepare(hdata->res.sclk_hdmi);
 	clk_set_parent(hdata->res.sclk_hdmi, hdata->res.sclk_hdmiphy);
-	clk_enable(hdata->res.sclk_hdmi);
+	clk_prepare_enable(hdata->res.sclk_hdmi);
 
 	/* enable HDMI and timing generator */
 	hdmi_reg_writemask(hdata, HDMI_CON_0, ~0, HDMI_EN);
@@ -1304,9 +1304,9 @@ static void hdmiphy_conf_reset(struct hdmi_context *hdata)
 	u8 buffer[2];
 	u32 reg;
 
-	clk_disable(hdata->res.sclk_hdmi);
+	clk_disable_unprepare(hdata->res.sclk_hdmi);
 	clk_set_parent(hdata->res.sclk_hdmi, hdata->res.sclk_pixel);
-	clk_enable(hdata->res.sclk_hdmi);
+	clk_prepare_enable(hdata->res.sclk_hdmi);
 
 	/* operation mode */
 	buffer[0] = 0x1f;
@@ -1683,9 +1683,9 @@ static void hdmi_poweron(struct hdmi_context *hdata)
 	if (regulator_bulk_enable(res->regul_count, res->regul_bulk))
 		DRM_DEBUG_KMS("failed to enable regulator bulk\n");
 
-	clk_enable(res->hdmiphy);
-	clk_enable(res->hdmi);
-	clk_enable(res->sclk_hdmi);
+	clk_prepare_enable(res->hdmiphy);
+	clk_prepare_enable(res->hdmi);
+	clk_prepare_enable(res->sclk_hdmi);
 
 	hdmiphy_poweron(hdata);
 }
@@ -1706,9 +1706,9 @@ static void hdmi_poweroff(struct hdmi_context *hdata)
 	hdmiphy_conf_reset(hdata);
 	hdmiphy_poweroff(hdata);
 
-	clk_disable(res->sclk_hdmi);
-	clk_disable(res->hdmi);
-	clk_disable(res->hdmiphy);
+	clk_disable_unprepare(res->sclk_hdmi);
+	clk_disable_unprepare(res->hdmi);
+	clk_disable_unprepare(res->hdmiphy);
 	regulator_bulk_disable(res->regul_count, res->regul_bulk);
 
 	mutex_lock(&hdata->hdmi_mutex);

drivers/gpu/drm/exynos/exynos_mixer.c

@@ -892,10 +892,10 @@ static void mixer_poweron(struct mixer_context *ctx)
 	ctx->powered = true;
 	mutex_unlock(&ctx->mixer_mutex);
 
-	clk_enable(res->mixer);
+	clk_prepare_enable(res->mixer);
 	if (ctx->vp_enabled) {
-		clk_enable(res->vp);
-		clk_enable(res->sclk_mixer);
+		clk_prepare_enable(res->vp);
+		clk_prepare_enable(res->sclk_mixer);
 	}
 
 	mixer_reg_write(res, MXR_INT_EN, ctx->int_en);
@@ -917,10 +917,10 @@ static void mixer_poweroff(struct mixer_context *ctx)
 
 	ctx->int_en = mixer_reg_read(res, MXR_INT_EN);
 
-	clk_disable(res->mixer);
+	clk_disable_unprepare(res->mixer);
 	if (ctx->vp_enabled) {
-		clk_disable(res->vp);
-		clk_disable(res->sclk_mixer);
+		clk_disable_unprepare(res->vp);
+		clk_disable_unprepare(res->sclk_mixer);
 	}
 
 	mutex_lock(&ctx->mixer_mutex);