From: Pratyush Yadav <p.yadav@ti.com>
To: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Vignesh Raghavendra <vigneshr@ti.com>,
Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,
Nikhil Devshatwar <nikhil.nd@ti.com>,
Pratyush Yadav <p.yadav@ti.com>,
Maxime Ripard <mripard@kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-media@vger.kernel.org>
Subject: [PATCH v3 04/11] media: cadence: csi2rx: Soft reset the streams before starting capture
Date: Fri, 25 Jun 2021 00:51:53 +0530 [thread overview]
Message-ID: <20210624192200.22559-5-p.yadav@ti.com> (raw)
In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com>
This resets the stream state machines and FIFOs, giving them a clean
slate. On J721E if the streams are not reset before starting the
capture, the captured frame gets wrapped around vertically on every run
after the first.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
(no changes since v1)
drivers/media/platform/cadence/cdns-csi2rx.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index d86be917135b..379bc163d4c1 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -39,6 +39,7 @@
#define CSI2RX_STREAM_BASE(n) (((n) + 1) * 0x100)
#define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000)
+#define CSI2RX_STREAM_CTRL_SOFT_RST BIT(4)
#define CSI2RX_STREAM_CTRL_START BIT(0)
#define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008)
@@ -135,12 +136,22 @@ struct csi2rx_priv *v4l2_subdev_to_csi2rx(struct v4l2_subdev *subdev)
static void csi2rx_reset(struct csi2rx_priv *csi2rx)
{
+ int i;
+
writel(CSI2RX_SOFT_RESET_PROTOCOL | CSI2RX_SOFT_RESET_FRONT,
csi2rx->base + CSI2RX_SOFT_RESET_REG);
udelay(10);
writel(0, csi2rx->base + CSI2RX_SOFT_RESET_REG);
+
+ /* Reset individual streams. */
+ for (i = 0; i < csi2rx->max_streams; i++) {
+ writel(CSI2RX_STREAM_CTRL_SOFT_RST,
+ csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+ usleep_range(10, 20);
+ writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+ }
}
static int csi2rx_configure_external_dphy(struct csi2rx_priv *csi2rx)
--
2.30.0
next prev parent reply other threads:[~2021-06-24 19:22 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-24 19:21 [PATCH v3 00/11] CSI2RX support on J721E Pratyush Yadav
2021-06-24 19:21 ` [PATCH v3 01/11] media: ov5640: Use runtime PM to control sensor power Pratyush Yadav
2021-07-07 20:37 ` Sakari Ailus
2021-07-07 21:00 ` Laurent Pinchart
2021-07-07 21:44 ` Sakari Ailus
2021-07-07 21:51 ` Laurent Pinchart
2021-07-08 10:28 ` Sakari Ailus
2021-06-24 19:21 ` [PATCH v3 02/11] media: cadence: csi2rx: Unregister v4l2 async notifier Pratyush Yadav
2021-06-24 19:21 ` [PATCH v3 03/11] media: cadence: csi2rx: Add external DPHY support Pratyush Yadav
2021-06-24 19:21 ` Pratyush Yadav [this message]
2021-06-24 19:21 ` [PATCH v3 05/11] media: cadence: csi2rx: Set the STOP bit when stopping a stream Pratyush Yadav
2021-06-24 19:21 ` [PATCH v3 06/11] media: cadence: csi2rx: Fix stream data configuration Pratyush Yadav
2021-06-24 19:21 ` [PATCH v3 07/11] media: cadence: csi2rx: Populate subdev devnode Pratyush Yadav
2021-06-24 19:21 ` [PATCH v3 08/11] media: Re-structure TI platform drivers Pratyush Yadav
2021-06-24 19:21 ` [PATCH v3 09/11] media: ti: Add CSI2RX support for J721E Pratyush Yadav
2021-06-24 19:21 ` [PATCH v3 10/11] media: dt-bindings: Add DT bindings for TI J721E CSI2RX driver Pratyush Yadav
2021-07-01 14:02 ` Rob Herring
2021-06-24 19:22 ` [PATCH v3 11/11] media: dt-bindings: Convert Cadence CSI2RX binding to YAML Pratyush Yadav
2021-07-01 18:55 ` Rob Herring
2021-07-07 18:45 ` Pratyush Yadav
2021-07-01 7:56 ` [PATCH v3 00/11] CSI2RX support on J721E Tomi Valkeinen
2021-07-07 18:56 ` Pratyush Yadav
2021-07-08 8:19 ` Jacopo Mondi
2021-07-08 8:43 ` Tomi Valkeinen
2021-07-08 11:25 ` Pratyush Yadav
2021-09-09 18:11 ` Pratyush Yadav
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