From: Jingoo Han <jg1.han@samsung.com>
To: linux-fbdev@vger.kernel.org
Subject: [PATCH] video: exynos_dp: use usleep_range instead of delay
Date: Wed, 18 Jul 2012 09:50:59 +0000 [thread overview]
Message-ID: <002201cd64ca$d5bbabb0$81330310$%han@samsung.com> (raw)
This patch replaces udelay and mdelay with usleep_range to remove
the busy loop waiting.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
---
drivers/video/exynos/exynos_dp_core.c | 14 +++++++-------
drivers/video/exynos/exynos_dp_reg.c | 4 ++--
2 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 9db7b9f..25907f4 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -47,7 +47,7 @@ static int exynos_dp_detect_hpd(struct exynos_dp_device *dp)
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 @@ static int exynos_dp_detect_hpd(struct exynos_dp_device *dp)
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 @@ static int exynos_dp_process_clock_recovery(struct exynos_dp_device *dp)
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 @@ static int exynos_dp_process_equalizer_training(struct exynos_dp_device *dp)
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 @@ static int exynos_dp_set_link_train(struct exynos_dp_device *dp,
if (retval = 0)
break;
- udelay(100);
+ usleep_range(100, 110);
}
return retval;
@@ -773,7 +773,7 @@ static int exynos_dp_config_video(struct exynos_dp_device *dp,
return -ETIMEDOUT;
}
- udelay(1);
+ usleep_range(1, 2);
}
/* Set to use the register calculated M/N video */
@@ -807,7 +807,7 @@ static int exynos_dp_config_video(struct exynos_dp_device *dp,
return -ETIMEDOUT;
}
- mdelay(1);
+ usleep_range(1000, 1001);
}
if (retval != 0)
diff --git a/drivers/video/exynos/exynos_dp_reg.c b/drivers/video/exynos/exynos_dp_reg.c
index 6ce76d5..ce401c8 100644
--- a/drivers/video/exynos/exynos_dp_reg.c
+++ b/drivers/video/exynos/exynos_dp_reg.c
@@ -122,7 +122,7 @@ void exynos_dp_reset(struct exynos_dp_device *dp)
LS_CLK_DOMAIN_FUNC_EN_N;
writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2);
- udelay(20);
+ usleep_range(20, 30);
exynos_dp_lane_swap(dp, 0);
@@ -988,7 +988,7 @@ void exynos_dp_reset_macro(struct exynos_dp_device *dp)
writel(reg, dp->reg_base + EXYNOS_DP_PHY_TEST);
/* 10 us is the minimum reset time. */
- udelay(10);
+ usleep_range(10, 20);
reg &= ~MACRO_RST;
writel(reg, dp->reg_base + EXYNOS_DP_PHY_TEST);
--
1.7.1
next reply other threads:[~2012-07-18 9:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-18 9:50 Jingoo Han [this message]
2012-07-26 17:22 ` [PATCH] video: exynos_dp: use usleep_range instead of delay Florian Tobias Schandinat
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