drm/mediatek: mark symbols static where possible

We get 4 warnings when building kernel with W=1:
drivers/gpu/drm/mediatek/mtk_hdmi.c:1089:6: warning: no previous prototype for 'mtk_hdmi_audio_enable' [-Wmissing-prototypes]
drivers/gpu/drm/mediatek/mtk_hdmi.c:1095:6: warning: no previous prototype for 'mtk_hdmi_audio_disable' [-Wmissing-prototypes]
drivers/gpu/drm/mediatek/mtk_hdmi.c:1101:5: warning: no previous prototype for 'mtk_hdmi_audio_set_param' [-Wmissing-prototypes]
drivers/gpu/drm/mediatek/mtk_hdmi.c:1627:5: warning: no previous prototype for 'mtk_hdmi_audio_digital_mute' [-Wmissing-prototypes]

In fact, both functions are only used in the file in which they are
declared and don't need a declaration, but can be made static.
So this patch marks both functions with 'static'.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
[seanpaul fixed checkpatch warning for argument alignment]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1474789109-22010-2-git-send-email-baoyou.xie@linaro.org

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 334562d..71227de 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1086,20 +1086,20 @@ static int mtk_hdmi_output_init(struct mtk_hdmi *hdmi)
        return 0;
 }
 
-void mtk_hdmi_audio_enable(struct mtk_hdmi *hdmi)
+static void mtk_hdmi_audio_enable(struct mtk_hdmi *hdmi)
 {
        mtk_hdmi_aud_enable_packet(hdmi, true);
        hdmi->audio_enable = true;
 }
 
-void mtk_hdmi_audio_disable(struct mtk_hdmi *hdmi)
+static void mtk_hdmi_audio_disable(struct mtk_hdmi *hdmi)
 {
        mtk_hdmi_aud_enable_packet(hdmi, false);
        hdmi->audio_enable = false;
 }
 
-int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi,
-                            struct hdmi_audio_param *param)
+static int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi,
+                                   struct hdmi_audio_param *param)
 {
        if (!hdmi->audio_enable) {
                dev_err(hdmi->dev, "hdmi audio is in disable state!\n");
@@ -1624,7 +1624,8 @@ static void mtk_hdmi_audio_shutdown(struct device *dev, void *data)
        mtk_hdmi_audio_disable(hdmi);
 }
 
-int mtk_hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
+static int
+mtk_hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
 {
        struct mtk_hdmi *hdmi = dev_get_drvdata(dev);