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

[Lee Jones]

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

 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c:527:12: warning: ‘analogix_dp_start_aux_transaction’ defined but not used [-Wunused-function]

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: Lee Jones <lee.jones at linaro.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 9ce45c757f8c8..cab6c8b92efd4 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -524,50 +524,6 @@ void analogix_dp_enable_sw_function(struct analogix_dp_device *dp)
 	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
 }
 
-static int analogix_dp_start_aux_transaction(struct analogix_dp_device *dp)
-{
-	int reg;
-	int retval = 0;
-	int timeout_loop = 0;
-
-	/* Enable AUX CH operation */
-	reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2);
-	reg |= AUX_EN;
-	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2);
-
-	/* Is AUX CH command reply received? */
-	reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
-	while (!(reg & RPLY_RECEIV)) {
-		timeout_loop++;
-		if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
-			dev_err(dp->dev, "AUX CH command reply failed!\n");
-			return -ETIMEDOUT;
-		}
-		reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
-		usleep_range(10, 11);
-	}
-
-	/* Clear interrupt source for AUX CH command reply */
-	writel(RPLY_RECEIV, dp->reg_base + ANALOGIX_DP_INT_STA);
-
-	/* Clear interrupt source for AUX CH access error */
-	reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
-	if (reg & AUX_ERR) {
-		writel(AUX_ERR, dp->reg_base + ANALOGIX_DP_INT_STA);
-		return -EREMOTEIO;
-	}
-
-	/* Check AUX CH error access status */
-	reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA);
-	if ((reg & AUX_STATUS_MASK) != 0) {
-		dev_err(dp->dev, "AUX CH error happens: %d\n\n",
-			reg & AUX_STATUS_MASK);
-		return -EREMOTEIO;
-	}
-
-	return retval;
-}
-
 void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype)
 {
 	u32 reg;
-- 
2.25.1