drm/exynos/hdmi: remove private lock code

Most of the code is called by drm core framework, so it is already synchronized.
The only async function is irq routine which only calls drm framework so it
does not need to be synchronized.

1 files changed, 1 insertions, 21 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index d9ce1c961d35..5ee71638ea76 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -21,7 +21,6 @@
 #include "regs-hdmi.h"
 
 #include <linux/kernel.h>
-#include <linux/spinlock.h>
 #include <linux/wait.h>
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
@@ -212,7 +211,6 @@ struct hdmi_context {
 	bool				hpd;
 	bool				powered;
 	bool				dvi_mode;
-	struct mutex			hdmi_mutex;
 
 	void __iomem			*regs;
 	int				irq;
@@ -1904,11 +1902,8 @@ static void hdmiphy_conf_apply(struct hdmi_context *hdata)
 
 static void hdmi_conf_apply(struct hdmi_context *hdata)
 {
-	mutex_lock(&hdata->hdmi_mutex);
 	hdmi_start(hdata, false);
 	hdmi_conf_init(hdata);
-	mutex_unlock(&hdata->hdmi_mutex);
-
 	hdmi_audio_init(hdata);
 
 	/* setting core registers */
@@ -2255,14 +2250,7 @@ static void hdmi_mode_set(struct exynos_drm_display *display,
 
 static void hdmi_poweron(struct hdmi_context *hdata)
 {
-	mutex_lock(&hdata->hdmi_mutex);
-	if (hdata->powered) {
-		mutex_unlock(&hdata->hdmi_mutex);
-		return;
-	}
-
 	hdata->powered = true;
-	mutex_unlock(&hdata->hdmi_mutex);
 	hdmi_conf_apply(hdata);
 }
 
@@ -2270,10 +2258,8 @@ static void hdmi_poweroff(struct hdmi_context *hdata)
 {
 	struct hdmi_resources *res = &hdata->res;
 
-	mutex_lock(&hdata->hdmi_mutex);
 	if (!hdata->powered)
-		goto out;
-	mutex_unlock(&hdata->hdmi_mutex);
+		return;
 
 	hdmi_set_refclk(hdata, SYSREG_HDMI_REFCLK_CLKI);
 
@@ -2296,11 +2282,7 @@ static void hdmi_poweroff(struct hdmi_context *hdata)
 
 	pm_runtime_put_sync(hdata->dev);
 
-	mutex_lock(&hdata->hdmi_mutex);
 	hdata->powered = false;
-
-out:
-	mutex_unlock(&hdata->hdmi_mutex);
 }
 
 static void hdmi_dpms(struct exynos_drm_display *display, int mode)
@@ -2583,8 +2565,6 @@ static int hdmi_probe(struct platform_device *pdev)
 	hdata->display.type = EXYNOS_DISPLAY_TYPE_HDMI;
 	hdata->display.ops = &hdmi_display_ops;
 
-	mutex_init(&hdata->hdmi_mutex);
-
 	platform_set_drvdata(pdev, hdata);
 
 	match = of_match_node(hdmi_match_types, dev->of_node);