From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <skomatineni@nvidia.com>, <thierry.reding@gmail.com>,
<jonathanh@nvidia.com>, <frankc@nvidia.com>, <hverkuil@xs4all.nl>,
<sakari.ailus@iki.fi>, <robh+dt@kernel.org>,
<helen.koike@collabora.com>
Cc: <digetx@gmail.com>, <sboyd@kernel.org>,
<gregkh@linuxfoundation.org>, <linux-media@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-i2c@vger.kernel.org>
Subject: [RFC PATCH v3 15/18] gpu: host1x: mipi: Use readl_relaxed_poll_timeout in tegra_mipi_wait
Date: Tue, 14 Jul 2020 21:20:52 -0700 [thread overview]
Message-ID: <1594786855-26506-16-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1594786855-26506-1-git-send-email-skomatineni@nvidia.com>
Use readl_relaxed_poll_timeout() in tegra_mipi_wait() to simplify
the code.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/gpu/host1x/mipi.c | 20 ++++++++------------
1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
index 762d349..259e70c 100644
--- a/drivers/gpu/host1x/mipi.c
+++ b/drivers/gpu/host1x/mipi.c
@@ -21,9 +21,9 @@
*/
#include <linux/clk.h>
-#include <linux/delay.h>
#include <linux/host1x.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -295,19 +295,15 @@ EXPORT_SYMBOL(tegra_mipi_disable);
static int tegra_mipi_wait(struct tegra_mipi *mipi)
{
- unsigned long timeout = jiffies + msecs_to_jiffies(250);
+ void __iomem *status_reg = mipi->regs + (MIPI_CAL_STATUS << 2);
u32 value;
+ int err;
- while (time_before(jiffies, timeout)) {
- value = tegra_mipi_readl(mipi, MIPI_CAL_STATUS);
- if ((value & MIPI_CAL_STATUS_ACTIVE) == 0 &&
- (value & MIPI_CAL_STATUS_DONE) != 0)
- return 0;
-
- usleep_range(10, 50);
- }
-
- return -ETIMEDOUT;
+ err = readl_relaxed_poll_timeout(status_reg, value,
+ !(value & MIPI_CAL_STATUS_ACTIVE) &&
+ (value & MIPI_CAL_STATUS_DONE), 50,
+ 250000);
+ return err;
}
int tegra_mipi_calibrate(struct tegra_mipi_device *device)
--
2.7.4
next prev parent reply other threads:[~2020-07-15 4:20 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-15 4:20 [RFC PATCH v3 00/18] Support for Tegra video capture from external sensor Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 01/18] dt-bindings: i2c: tegra: Document Tegra210 VI I2C clocks and power-domains Sowjanya Komatineni
2020-07-16 13:25 ` Thierry Reding
2020-07-15 4:20 ` [RFC PATCH v3 02/18] arm64: tegra: Add missing clocks and power-domains to Tegra210 VI I2C Sowjanya Komatineni
2020-07-16 13:25 ` Thierry Reding
2020-07-15 4:20 ` [RFC PATCH v3 03/18] i2c: tegra: Don't mark VI I2C as IRQ safe runtime PM Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 04/18] i2c: tegra: Remove NULL pointer check before clk_enable/disable/prepare/unprepare Sowjanya Komatineni
2020-07-16 20:25 ` Dmitry Osipenko
2020-07-15 4:20 ` [RFC PATCH v3 05/18] i2c: tegra: Fix the error path in tegra_i2c_runtime_resume Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 06/18] i2c: tegra: Fix runtime resume to re-init VI I2C Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 07/18] i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 08/18] media: tegra-video: Fix channel format alignment Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 09/18] media: tegra-video: Enable TPG based on kernel config Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 10/18] media: tegra-video: Update format lookup to offset based Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 11/18] dt-bindings: tegra: Update VI and CSI bindings with port info Sowjanya Komatineni
2020-07-16 19:09 ` Rob Herring
2020-07-15 4:20 ` [RFC PATCH v3 12/18] media: tegra-video: Add support for external sensor capture Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 13/18] media: tegra-video: Add support for selection ioctl ops Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 14/18] gpu: host1x: mipi: Update tegra_mipi_request() to be node based Sowjanya Komatineni
2020-07-16 20:26 ` Dmitry Osipenko
2020-07-15 4:20 ` Sowjanya Komatineni [this message]
2020-07-15 4:20 ` [RFC PATCH v3 16/18] gpu: host1x: mipi: Split tegra_mipi_calibrate and tegra_mipi_wait Sowjanya Komatineni
2020-07-16 20:38 ` Dmitry Osipenko
2020-07-16 21:09 ` Sowjanya Komatineni
2020-07-16 21:18 ` Dmitry Osipenko
2020-07-16 22:49 ` Sowjanya Komatineni
2020-07-16 23:01 ` Dmitry Osipenko
2020-07-16 23:06 ` Sowjanya Komatineni
2020-07-16 23:09 ` Sowjanya Komatineni
2020-07-16 23:47 ` Dmitry Osipenko
2020-07-17 0:16 ` Sowjanya Komatineni
2020-07-17 4:46 ` Sowjanya Komatineni
2020-07-17 15:01 ` Dmitry Osipenko
2020-07-17 15:41 ` Sowjanya Komatineni
2020-07-17 20:14 ` Dmitry Osipenko
2020-07-15 4:20 ` [RFC PATCH v3 17/18] media: tegra-video: Add CSI MIPI pads calibration Sowjanya Komatineni
2020-07-15 4:20 ` [RFC PATCH v3 18/18] media: tegra-video: Compute settle times based on the clock rate Sowjanya Komatineni
2020-07-17 10:54 ` [RFC PATCH v3 00/18] Support for Tegra video capture from external sensor Hans Verkuil
2020-07-17 16:34 ` Sowjanya Komatineni
2020-07-17 17:08 ` Hans Verkuil
2020-07-17 17:23 ` Sowjanya Komatineni
2020-07-17 17:38 ` Sowjanya Komatineni
2020-07-17 17:48 ` Sowjanya Komatineni
2020-07-20 4:41 ` Sowjanya Komatineni
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