[PATCH] drm/mediatek: mark symbols static where possible

From: Baoyou Xie
Date: Sun Sep 18 2016 - 10:03:41 EST

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@xxxxxxxxxx>
drivers/gpu/drm/mediatek/mtk_hdmi.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 334562d..be4e19c 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1086,19 +1086,19 @@ 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,
+static int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi,
struct hdmi_audio_param *param)
if (!hdmi->audio_enable) {
@@ -1624,7 +1624,8 @@ static void mtk_hdmi_audio_shutdown(struct device *dev, void *data)

-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);