gpu: drm: bridge: analogix: analogix_dp_reg: Remove unused function 'analogix_dp_writ...

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@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Jason Yan <yanaijie@huawei.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105144517.1826692-13-lee.jones@linaro.org

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
index fafb4b492ea047666afc30c11ebfbe1aaf85c3c9..cab6c8b92efd4030d42e630ba1f6b8162056b983 100644 (file)
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -524,94 +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;
-}
-
-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;