From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>,
Archit Taneja <architt@codeaurora.org>,
Andrzej Hajda <a.hajda@samsung.com>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Chris Healy <cphealy@gmail.com>,
Lucas Stach <l.stach@pengutronix.de>,
linux-kernel@vger.kernel.org
Subject: [PATCH 5/9] drm/bridge: tc358767: Simplify polling in tc_link_training()
Date: Tue, 26 Feb 2019 11:36:05 -0800 [thread overview]
Message-ID: <20190226193609.9862-6-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190226193609.9862-1-andrew.smirnov@gmail.com>
Replace explicit polling in tc_link_training() with equivalent call to
regmap_read_poll_timeout() for simplicity. No functional change
intended (not including slightly altered debug output).
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
---
drivers/gpu/drm/bridge/tc358767.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 6455e6484722..ea30cec4a0c3 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -735,7 +735,6 @@ static int tc_link_training(struct tc_data *tc, int pattern)
const char * const *errors;
u32 srcctrl = tc_srcctrl(tc) | DP0_SRCCTRL_SCRMBLDIS |
DP0_SRCCTRL_AUTOCORRECT;
- int timeout;
int retry;
u32 value;
int ret;
@@ -765,20 +764,17 @@ static int tc_link_training(struct tc_data *tc, int pattern)
tc_write(DP0CTL, DP_EN);
/* wait */
- timeout = 1000;
- do {
- tc_read(DP0_LTSTAT, &value);
- udelay(1);
- } while ((!(value & LT_LOOPDONE)) && (--timeout));
- if (timeout == 0) {
+ ret = regmap_read_poll_timeout(tc->regmap, DP0_LTSTAT, value,
+ value & LT_LOOPDONE, 1, 1000);
+ if (ret) {
dev_err(tc->dev, "Link training timeout!\n");
} else {
int pattern = (value >> 11) & 0x3;
int error = (value >> 8) & 0x7;
dev_dbg(tc->dev,
- "Link training phase %d done after %d uS: %s\n",
- pattern, 1000 - timeout, errors[error]);
+ "Link training phase %d done: %s\n",
+ pattern, errors[error]);
if (pattern == DP_TRAINING_PATTERN_1 && error == 0)
break;
if (pattern == DP_TRAINING_PATTERN_2) {
--
2.20.1
next prev parent reply other threads:[~2019-02-26 19:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-26 19:36 [PATCH 0/9] tc358767 driver improvements Andrey Smirnov
2019-02-26 19:36 ` [PATCH 1/9] drm/bridge: tc358767: Simplify tc_poll_timeout() Andrey Smirnov
2019-03-04 9:28 ` Andrzej Hajda
2019-03-04 12:17 ` Laurent Pinchart
2019-02-26 19:36 ` [PATCH 2/9] drm/bridge: tc358767: Simplify tc_stream_clock_calc() Andrey Smirnov
2019-03-04 9:42 ` Andrzej Hajda
2019-03-04 12:20 ` Laurent Pinchart
2019-03-11 17:51 ` Andrey Smirnov
2019-02-26 19:36 ` [PATCH 3/9] drm/bridge: tc358767: Simplify tc_set_video_mode() Andrey Smirnov
2019-03-04 12:25 ` Laurent Pinchart
2019-03-11 17:56 ` Andrey Smirnov
2019-02-26 19:36 ` [PATCH 4/9] drm/bridge: tc358767: Simplify polling in tc_main_link_setup() Andrey Smirnov
2019-03-04 12:28 ` Laurent Pinchart
2019-02-26 19:36 ` Andrey Smirnov [this message]
2019-03-04 12:30 ` [PATCH 5/9] drm/bridge: tc358767: Simplify polling in tc_link_training() Laurent Pinchart
2019-03-11 18:26 ` Andrey Smirnov
2019-03-12 15:15 ` Laurent Pinchart
2019-02-26 19:36 ` [PATCH 6/9] drm/bridge: tc358767: Simplify error check in tc_aux_linx_setup() Andrey Smirnov
2019-03-04 12:33 ` Laurent Pinchart
2019-03-11 18:32 ` Andrey Smirnov
2019-02-26 19:36 ` [PATCH 7/9] drm/bridge: tc358767: Introduce tc_set_syspllparam() Andrey Smirnov
2019-03-04 12:34 ` Laurent Pinchart
2019-02-26 19:36 ` [PATCH 8/9] drm/bridge: tc358767: Introduce tc_pllupdate_pllen() Andrey Smirnov
2019-03-04 12:37 ` Laurent Pinchart
2019-02-26 19:36 ` [PATCH 9/9] drm/bridge: tc358767: Drop tc_read() macro Andrey Smirnov
2019-03-04 12:39 ` Laurent Pinchart
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