video: exynos_dp: use usleep_range instead of delay
This patch replaces udelay and mdelay with usleep_range to remove
the busy loop waiting.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 0f3a64b..c6c016a 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -47,7 +47,7 @@
exynos_dp_init_hpd(dp);
- udelay(200);
+ usleep_range(200, 210);
while (exynos_dp_get_plug_in_status(dp) != 0) {
timeout_loop++;
@@ -55,7 +55,7 @@
dev_err(dp->dev, "failed to get hpd plug status\n");
return -ETIMEDOUT;
}
- udelay(10);
+ usleep_range(10, 11);
}
return 0;
@@ -486,7 +486,7 @@
u8 pre_emphasis;
u8 training_lane;
- udelay(100);
+ usleep_range(100, 101);
exynos_dp_read_bytes_from_dpcd(dp, DPCD_ADDR_LANE0_1_STATUS,
6, link_status);
@@ -571,7 +571,7 @@
u8 adjust_request[2];
- udelay(400);
+ usleep_range(400, 401);
exynos_dp_read_bytes_from_dpcd(dp, DPCD_ADDR_LANE0_1_STATUS,
6, link_status);
@@ -739,7 +739,7 @@
if (retval == 0)
break;
- udelay(100);
+ usleep_range(100, 110);
}
return retval;
@@ -773,7 +773,7 @@
return -ETIMEDOUT;
}
- udelay(1);
+ usleep_range(1, 2);
}
/* Set to use the register calculated M/N video */
@@ -807,7 +807,7 @@
return -ETIMEDOUT;
}
- mdelay(1);
+ usleep_range(1000, 1001);
}
if (retval != 0)