[PATCH 12/19] gpu: drm: bridge: analogix: analogix_dp_reg: Remove unused function 'analogix_dp_write_byte_to_dpcd'

[Lee Jones]

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c:571:5: warning: no previous prototype for ‘analogix_dp_write_byte_to_dpcd’ [-Wmissing-prototypes]

Cc: Andrzej Hajda <a.hajda at samsung.com>
Cc: Neil Armstrong <narmstrong at baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
Cc: Jonas Karlman <jonas at kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec at siol.net>
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Jason Yan <yanaijie at huawei.com>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Jingoo Han <jg1.han at samsung.com>
Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones at linaro.org>
---
 .../gpu/drm/bridge/analogix/analogix_dp_reg.c | 44 -------------------
 1 file changed, 44 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
index fafb4b492ea04..9ce45c757f8c8 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -568,50 +568,6 @@ static int analogix_dp_start_aux_transaction(struct analogix_dp_device *dp)
 	return retval;
 }
 
-int analogix_dp_write_byte_to_dpcd(struct analogix_dp_device *dp,
-				   unsigned int reg_addr,
-				   unsigned char data)
-{
-	u32 reg;
-	int i;
-	int retval;
-
-	for (i = 0; i < 3; i++) {
-		/* Clear AUX CH data buffer */
-		reg = BUF_CLR;
-		writel(reg, dp->reg_base + ANALOGIX_DP_BUFFER_DATA_CTL);
-
-		/* Select DPCD device address */
-		reg = AUX_ADDR_7_0(reg_addr);
-		writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_7_0);
-		reg = AUX_ADDR_15_8(reg_addr);
-		writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_15_8);
-		reg = AUX_ADDR_19_16(reg_addr);
-		writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_19_16);
-
-		/* Write data buffer */
-		reg = (unsigned int)data;
-		writel(reg, dp->reg_base + ANALOGIX_DP_BUF_DATA_0);
-
-		/*
-		 * Set DisplayPort transaction and write 1 byte
-		 * If bit 3 is 1, DisplayPort transaction.
-		 * If Bit 3 is 0, I2C transaction.
-		 */
-		reg = AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_WRITE;
-		writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_1);
-
-		/* Start AUX transaction */
-		retval = analogix_dp_start_aux_transaction(dp);
-		if (retval == 0)
-			break;
-
-		dev_dbg(dp->dev, "%s: Aux Transaction fail!\n", __func__);
-	}
-
-	return retval;
-}
-
 void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype)
 {
 	u32 reg;
-- 
2.25.1