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gpu: drm: bridge: analogix: analogix_dp_reg: Remove unused function 'analogix_dp_write_byte_to_dpcd'

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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
This commit is contained in:
Lee Jones 2020-11-05 14:45:10 +00:00 committed by Sam Ravnborg
parent 5d89045b33
commit 2f62f4990d
1 changed files with 0 additions and 88 deletions
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88
drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
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@ -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;